├── .gitignore ├── LICENSE ├── README.md ├── components └── twc-controller │ ├── __init__.py │ ├── functions.cpp │ ├── functions.h │ ├── io.h │ ├── twc_connector.cpp │ ├── twc_connector.h │ ├── twc_controller.cpp │ ├── twc_controller.h │ ├── twc_protocol.cpp │ └── twc_protocol.h └── twc.yaml /.gitignore: -------------------------------------------------------------------------------- 1 | __pycache__/ 2 | 3 | # Ignore vim recovery files 4 | .*.swp 5 | 6 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # TWC Controller 2 | 3 | This is an [esphome](https://esphome.io) external component of the Tesla Wall Connector Gen2 controller which was previously a standalone Arduino application (https://github.com/jnicolson/twc-controller). The change to esphome means no more worrying about the boilerplate type setup of Wifi, Over the air updates, MQTT connections, etc. Instead the focus just becomes on the Tesla load sharing protocol. 4 | 5 | Credit goes to [WinterDragoness](https://teslamotorsclub.com/tmc/members/winterdragoness.40930/) from the Tesla Motor Club forums for figuring out the protocol (with many others in the forum also giving help) and [Craig 128](https://teslamotorsclub.com/tmc/members/craig-128.113283/) for the original C code I used as a reference. Both their projects are linked in the links section below - without both of them this wouldn't have been possible. 6 | 7 | ## Features 8 | 9 | This is designed to work with Home Assistant by exposing a single controllable number - the current to make available to the charger. This can be automated in Home Assistant based on whatever data is available in Home Assistant (i.e. time of day, solar availability). 10 | 11 | The charger also exposes many sensors for Voltage, Current, kWh provided over the lifetime, serial number, connected VIN. These are all visible in the example YAML file twc.yaml. 12 | 13 | ## Hardware 14 | 15 | This should run on any ESP32 based board with an RS485 transceiver which supports reading and writing. This code is tested on a custom board with hardware design available at https://github.com/jnicolson/TWCController 16 | 17 | ## Installation 18 | 19 | Included in this repository is an example esphome yaml file. This assumes: 20 | * Secondary UART connected to GPIO5 and GPIO19 (update as required) 21 | * RS485 Receive Enable connected to GPIO18 22 | 23 | ## Other Projects 24 | 25 | * [TWC](https://github.com/craigpeacock/TWC) 26 | * [TWCManager](https://github.com/ngardiner/TWCManager) 27 | * [TWCManager (original)](https://github.com/dracoventions/TWCManager) 28 | -------------------------------------------------------------------------------- /components/twc-controller/__init__.py: -------------------------------------------------------------------------------- 1 | import esphome.codegen as cg 2 | import esphome.config_validation as cv 3 | from esphome.cpp_helpers import gpio_pin_expression 4 | from esphome import pins 5 | from esphome.components import ( 6 | number, 7 | sensor, 8 | text_sensor, 9 | uart, 10 | ) 11 | 12 | from esphome.const import ( 13 | CONF_ID, 14 | CONF_NAME, 15 | CONF_STEP, 16 | CONF_RESTORE_VALUE, 17 | CONF_UNIT_OF_MEASUREMENT, 18 | CONF_CURRENT, 19 | CONF_STATE, 20 | CONF_FLOW_CONTROL_PIN, 21 | 22 | UNIT_AMPERE, 23 | UNIT_KILOWATT_HOURS, 24 | UNIT_VOLT, 25 | 26 | DEVICE_CLASS_CURRENT, 27 | DEVICE_CLASS_ENERGY, 28 | DEVICE_CLASS_VOLTAGE, 29 | 30 | STATE_CLASS_MEASUREMENT, 31 | STATE_CLASS_TOTAL_INCREASING, 32 | ) 33 | 34 | CONF_MAX_ALLOWABLE_CURRENT = "max_allowable_current" 35 | CONF_TOTAL_KWH = "total_kwh_delivered" 36 | CONF_SERIAL = "serial" 37 | CONF_PHASE_1_VOLTAGE = "phase_1_voltage" 38 | CONF_PHASE_2_VOLTAGE = "phase_2_voltage" 39 | CONF_PHASE_3_VOLTAGE = "phase_3_voltage" 40 | CONF_PHASE_1_CURRENT = "phase_1_current" 41 | CONF_PHASE_2_CURRENT = "phase_2_current" 42 | CONF_PHASE_3_CURRENT = "phase_3_current" 43 | CONF_FIRMWARE_VERSION = "firmware_version" 44 | CONF_ACTUAL_CURRENT = "actual_current" 45 | CONF_VIN = "connected_vin" 46 | CONF_PASSIVE_MODE = "passive_mode" 47 | 48 | CONF_MIN_CURRENT = "min_current" 49 | CONF_MAX_CURRENT = "max_current" 50 | CONF_SET_CURRENT = "set_current" 51 | CONF_TWCID = "twc_id" 52 | 53 | ICON_CURRENT_AC = "mdi:current-ac" 54 | ICON_CAR = "mdi:car" 55 | ICON_NUMERIC = "mdi:numeric" 56 | ICON_LIGHTNING_BOLT = "mdi:lightning-bolt" 57 | 58 | AUTO_LOAD = ["number", "sensor", "text_sensor"] 59 | DEPENDENCIES = ["uart"] 60 | 61 | TEXT_TYPES = [ 62 | CONF_SERIAL, 63 | CONF_FIRMWARE_VERSION, 64 | CONF_VIN 65 | ] 66 | 67 | TYPES = [ 68 | CONF_MAX_ALLOWABLE_CURRENT, 69 | CONF_CURRENT, 70 | CONF_STATE, 71 | CONF_TOTAL_KWH, 72 | CONF_PHASE_1_VOLTAGE, 73 | CONF_PHASE_2_VOLTAGE, 74 | CONF_PHASE_3_VOLTAGE, 75 | CONF_PHASE_1_CURRENT, 76 | CONF_PHASE_2_CURRENT, 77 | CONF_PHASE_3_CURRENT, 78 | CONF_ACTUAL_CURRENT, 79 | ] 80 | 81 | twc_controller_ns = cg.esphome_ns.namespace("twc_controller") 82 | TWCController = twc_controller_ns.class_( 83 | "TWCController", number.Number, cg.Component, uart.UARTDevice 84 | ) 85 | 86 | def validate_min_max(config): 87 | if config[CONF_MAX_CURRENT] <= config[CONF_MIN_CURRENT]: 88 | raise cv.Invalid(f"{CONF_MAX_CURRENT} must be greater than {CONF_MIN_CURRENT}") 89 | 90 | if CONF_SET_CURRENT in config: 91 | if (config[CONF_SET_CURRENT] > config[CONF_MAX_CURRENT]) or (config[CONF_SET_CURRENT] < config[CONF_MIN_CURRENT]): 92 | raise cv.Invalid(f"{CONF_SET_CURRENT} must be between {CONF_MIN_CURRENT} and {CONF_MAX_CURRENT}") 93 | 94 | return config 95 | 96 | CONFIG_SCHEMA = cv.All( 97 | number.number_schema(TWCController).extend( 98 | { 99 | cv.Optional(CONF_NAME, default="Set Current"): cv.string, 100 | cv.Optional(CONF_MIN_CURRENT, default=6): cv.int_range(min=6, max=32), 101 | cv.Optional(CONF_MAX_CURRENT, default=32): cv.int_range(min=6, max=32), 102 | cv.Optional(CONF_TWCID, default=0xABCD): cv.hex_int_range(0, 65535), 103 | cv.Optional(CONF_SET_CURRENT): cv.positive_int, 104 | cv.Optional(CONF_STEP, default=1): cv.positive_int, 105 | cv.Optional(CONF_RESTORE_VALUE, default=True): cv.boolean, 106 | cv.Optional(CONF_UNIT_OF_MEASUREMENT, default=UNIT_AMPERE): cv.one_of(UNIT_AMPERE), 107 | cv.Optional(CONF_PASSIVE_MODE, default=0): cv.int_range(min=0, max=1), 108 | cv.Required(CONF_FLOW_CONTROL_PIN): pins.gpio_output_pin_schema, 109 | cv.Optional(CONF_CURRENT): sensor.sensor_schema( 110 | unit_of_measurement=UNIT_AMPERE, 111 | icon=ICON_CURRENT_AC, 112 | accuracy_decimals=0, 113 | device_class=DEVICE_CLASS_CURRENT, 114 | state_class=STATE_CLASS_MEASUREMENT, 115 | ), 116 | cv.Optional(CONF_MAX_ALLOWABLE_CURRENT): sensor.sensor_schema( 117 | unit_of_measurement=UNIT_AMPERE, 118 | icon=ICON_CURRENT_AC, 119 | accuracy_decimals=0, 120 | device_class=DEVICE_CLASS_CURRENT, 121 | state_class=STATE_CLASS_MEASUREMENT, 122 | ), 123 | cv.Optional(CONF_TOTAL_KWH): sensor.sensor_schema( 124 | unit_of_measurement=UNIT_KILOWATT_HOURS, 125 | icon=ICON_CURRENT_AC, 126 | accuracy_decimals=0, 127 | device_class=DEVICE_CLASS_ENERGY, 128 | state_class=STATE_CLASS_TOTAL_INCREASING, 129 | ), 130 | cv.Optional(CONF_SERIAL): text_sensor.text_sensor_schema( 131 | icon=ICON_CURRENT_AC, 132 | ), 133 | cv.Optional(CONF_PHASE_1_VOLTAGE): sensor.sensor_schema( 134 | unit_of_measurement=UNIT_VOLT, 135 | icon=ICON_LIGHTNING_BOLT, 136 | accuracy_decimals=0, 137 | device_class=DEVICE_CLASS_VOLTAGE, 138 | state_class=STATE_CLASS_MEASUREMENT, 139 | ), 140 | cv.Optional(CONF_PHASE_2_VOLTAGE): sensor.sensor_schema( 141 | unit_of_measurement=UNIT_VOLT, 142 | icon=ICON_LIGHTNING_BOLT, 143 | accuracy_decimals=0, 144 | device_class=DEVICE_CLASS_VOLTAGE, 145 | state_class=STATE_CLASS_MEASUREMENT, 146 | ), 147 | cv.Optional(CONF_PHASE_3_VOLTAGE): sensor.sensor_schema( 148 | unit_of_measurement=UNIT_VOLT, 149 | icon=ICON_LIGHTNING_BOLT, 150 | accuracy_decimals=0, 151 | device_class=DEVICE_CLASS_VOLTAGE, 152 | state_class=STATE_CLASS_MEASUREMENT, 153 | ), 154 | cv.Optional(CONF_PHASE_1_CURRENT): sensor.sensor_schema( 155 | unit_of_measurement=UNIT_AMPERE, 156 | icon=ICON_CURRENT_AC, 157 | accuracy_decimals=0, 158 | device_class=DEVICE_CLASS_CURRENT, 159 | state_class=STATE_CLASS_MEASUREMENT, 160 | ), 161 | cv.Optional(CONF_PHASE_2_CURRENT): sensor.sensor_schema( 162 | unit_of_measurement=UNIT_AMPERE, 163 | icon=ICON_CURRENT_AC, 164 | accuracy_decimals=0, 165 | device_class=DEVICE_CLASS_CURRENT, 166 | state_class=STATE_CLASS_MEASUREMENT, 167 | ), 168 | cv.Optional(CONF_PHASE_3_CURRENT): sensor.sensor_schema( 169 | unit_of_measurement=UNIT_AMPERE, 170 | icon=ICON_CURRENT_AC, 171 | accuracy_decimals=0, 172 | device_class=DEVICE_CLASS_CURRENT, 173 | state_class=STATE_CLASS_MEASUREMENT, 174 | ), 175 | cv.Optional(CONF_FIRMWARE_VERSION): text_sensor.text_sensor_schema( 176 | icon=ICON_NUMERIC, 177 | ), 178 | cv.Optional(CONF_VIN): text_sensor.text_sensor_schema( 179 | icon=ICON_CAR, 180 | ), 181 | cv.Optional(CONF_ACTUAL_CURRENT): sensor.sensor_schema( 182 | unit_of_measurement=UNIT_AMPERE, 183 | icon=ICON_CURRENT_AC, 184 | accuracy_decimals=0, 185 | device_class=DEVICE_CLASS_CURRENT, 186 | state_class=STATE_CLASS_MEASUREMENT, 187 | ), 188 | cv.Optional(CONF_STATE): sensor.sensor_schema( 189 | icon=ICON_CURRENT_AC, 190 | accuracy_decimals=0, 191 | ), 192 | } 193 | ) 194 | .extend(uart.UART_DEVICE_SCHEMA) 195 | .extend(cv.COMPONENT_SCHEMA), 196 | validate_min_max 197 | ) 198 | 199 | async def setup_sensor(config, key, hub): 200 | if sensor_config := config.get(key): 201 | sens = await sensor.new_sensor(sensor_config) 202 | cg.add(getattr(hub, f"set_{key}_sensor")(sens)) 203 | 204 | async def setup_text_sensor(config, key, hub): 205 | if sensor_config := config.get(key): 206 | sens = await text_sensor.new_text_sensor(sensor_config) 207 | cg.add(getattr(hub, f"set_{key}_text_sensor")(sens)) 208 | 209 | async def to_code(config): 210 | num_var = await number.new_number( 211 | config, 212 | min_value=config[CONF_MIN_CURRENT], 213 | max_value=config[CONF_MAX_CURRENT], 214 | step=config[CONF_STEP], 215 | ) 216 | 217 | await cg.register_component(num_var, config) 218 | await uart.register_uart_device(num_var, config) 219 | 220 | cg.add(num_var.set_min_current(config[CONF_MIN_CURRENT])) 221 | cg.add(num_var.set_max_current(config[CONF_MAX_CURRENT])) 222 | cg.add(num_var.set_twcid(config[CONF_TWCID])) 223 | cg.add(num_var.set_passive_mode(config[CONF_PASSIVE_MODE])) 224 | 225 | for key in TYPES: 226 | await setup_sensor(config, key, num_var) 227 | 228 | for key in TEXT_TYPES: 229 | await setup_text_sensor(config, key, num_var) 230 | 231 | pin = await gpio_pin_expression(config[CONF_FLOW_CONTROL_PIN]) 232 | cg.add(num_var.set_flow_control_pin(pin)) 233 | -------------------------------------------------------------------------------- /components/twc-controller/functions.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | 3 | #include "functions.h" 4 | 5 | namespace esphome { 6 | namespace twc_controller { 7 | uint8_t hexCharacterStringToBytes(uint8_t *byteArray, const uint8_t *hexString, size_t length) 8 | { 9 | //bool oddLength = strlen(hexString) & 1; 10 | bool oddLength = length & 1; 11 | 12 | std::uint8_t currentByte = 0; 13 | std::uint8_t byteIndex = 0; 14 | 15 | for (uint8_t charIndex = 0; charIndex < length; charIndex++) 16 | { 17 | bool oddCharIndex = charIndex & 1; 18 | 19 | if (oddLength) 20 | { 21 | // If the length is odd 22 | if (oddCharIndex) 23 | { 24 | // odd characters go in high nibble 25 | currentByte = nibble(hexString[charIndex]) << 4; 26 | } 27 | else 28 | { 29 | // Even characters go into low nibble 30 | currentByte |= nibble(hexString[charIndex]); 31 | byteArray[byteIndex++] = currentByte; 32 | currentByte = 0; 33 | } 34 | } 35 | else 36 | { 37 | // If the length is even 38 | if (!oddCharIndex) 39 | { 40 | // Odd characters go into the high nibble 41 | currentByte = nibble(hexString[charIndex]) << 4; 42 | } 43 | else 44 | { 45 | // Odd characters go into low nibble 46 | currentByte |= nibble(hexString[charIndex]); 47 | byteArray[byteIndex++] = currentByte; 48 | currentByte = 0; 49 | } 50 | } 51 | } 52 | return byteIndex; 53 | } 54 | 55 | uint8_t nibble(uint8_t c) { 56 | if (c >= '0' && c <= '9') 57 | return c - '0'; 58 | 59 | if (c >= 'a' && c <= 'f') 60 | return c - 'a' + 10; 61 | 62 | if (c >= 'A' && c <= 'F') 63 | return c - 'A' + 10; 64 | 65 | return 0; // Not a valid hexadecimal character 66 | } 67 | 68 | long random(long lower, long upper) { 69 | if(lower >= upper) { 70 | return lower; 71 | } 72 | return random_uint32()%(upper - lower) + lower; 73 | } 74 | 75 | 76 | } 77 | } -------------------------------------------------------------------------------- /components/twc-controller/functions.h: -------------------------------------------------------------------------------- 1 | #pragma once 2 | 3 | #include 4 | 5 | #include "esphome/core/helpers.h" 6 | 7 | namespace esphome { 8 | namespace twc_controller { 9 | uint8_t hexCharacterStringToBytes(uint8_t*, const uint8_t*, size_t); 10 | uint8_t nibble(uint8_t); 11 | long random(long, long); 12 | } 13 | } 14 | -------------------------------------------------------------------------------- /components/twc-controller/io.h: -------------------------------------------------------------------------------- 1 | /* 2 | TWC Manager for ESP32 3 | Copyright (C) 2023 Jarl Nicolson 4 | This program is free software; you can redistribute it and/or 5 | modify it under the terms of the GNU General Public License 6 | as published by the Free Software Foundation; either version 3 7 | of the License, or (at your option) any later version. 8 | This program is distributed in the hope that it will be useful, 9 | but WITHOUT ANY WARRANTY; without even the implied warranty of 10 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 | GNU General Public License for more details. 12 | You should have received a copy of the GNU General Public License 13 | along with this program. If not, see . 14 | */ 15 | 16 | #pragma once 17 | 18 | namespace esphome { 19 | namespace twc_controller { 20 | class TeslaControllerIO { 21 | public: 22 | virtual ~TeslaControllerIO() {}; 23 | virtual void resetIO(uint16_t); 24 | virtual void writeActualCurrent(uint8_t) = 0; 25 | virtual void writeCharger(uint16_t, uint8_t) = 0; 26 | virtual void writeChargerCurrent(uint16_t, uint8_t, uint8_t) = 0; 27 | virtual void writeChargerSerial(uint16_t, std::string) = 0; 28 | virtual void writeChargerTotalKwh(uint16_t, uint32_t) = 0; 29 | virtual void writeChargerVoltage(uint16_t, uint16_t, uint8_t) = 0; 30 | virtual void writeTotalConnectedChargers(uint8_t) = 0; 31 | virtual void writeChargerFirmware(uint16_t, std::string) = 0; 32 | virtual void writeChargerActualCurrent(uint16_t, uint8_t) = 0; 33 | virtual void writeChargerTotalPhaseCurrent(uint8_t, uint8_t) = 0; 34 | virtual void writeChargerConnectedVin(uint16_t, std::string) = 0; 35 | virtual void writeChargerState(uint16_t, uint8_t) = 0; 36 | virtual void writeTotalConnectedCars(uint8_t) = 0; 37 | virtual void writeRaw(uint8_t*, size_t) = 0; 38 | virtual void writeRawPacket(uint8_t *data, size_t length) = 0; 39 | virtual void onCurrentMessage(std::function) = 0; 40 | }; 41 | } 42 | } 43 | -------------------------------------------------------------------------------- /components/twc-controller/twc_connector.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | TWC Manager for ESP32 3 | Copyright (C) 2020 Jarl Nicolson 4 | This program is free software; you can redistribute it and/or 5 | modify it under the terms of the GNU General Public License 6 | as published by the Free Software Foundation; either version 3 7 | of the License, or (at your option) any later version. 8 | This program is distributed in the hope that it will be useful, 9 | but WITHOUT ANY WARRANTY; without even the implied warranty of 10 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 | GNU General Public License for more details. 12 | You should have received a copy of the GNU General Public License 13 | along with this program. If not, see . 14 | */ 15 | 16 | 17 | 18 | #include "twc_connector.h" 19 | 20 | 21 | namespace esphome { 22 | namespace twc_controller { 23 | static const char *TAG = "twc-controller.connector"; 24 | 25 | TeslaConnector::TeslaConnector(uint16_t twcid, uint8_t max_allowable_current) : 26 | twcid(twcid), 27 | max_allowable_current(max_allowable_current) 28 | { 29 | // Fill array with null. That way when the VIN 30 | // has been fully populated (by 3 different calls), 31 | // strlen(vin_) will return 17. 32 | memset(vin_, '\0', sizeof(uint8_t) * 18); 33 | } 34 | 35 | uint8_t * TeslaConnector::GetVin() { 36 | return vin_; 37 | } 38 | 39 | void TeslaConnector::SetActualCurrent(uint8_t current) { 40 | actual_current_ = current; 41 | } 42 | 43 | uint8_t TeslaConnector::GetActualCurrent() { 44 | return actual_current_; 45 | } 46 | 47 | uint8_t TeslaConnector::GetPhaseCurrent(uint8_t phase) { 48 | switch (phase) { 49 | case 1: 50 | return phase1_current; 51 | break; 52 | case 2: 53 | return phase2_current; 54 | break; 55 | case 3: 56 | return phase3_current; 57 | break; 58 | default: 59 | ESP_LOGE(TAG, "Request for phase >3 - ignored"); 60 | return 0; 61 | } 62 | } 63 | } 64 | } -------------------------------------------------------------------------------- /components/twc-controller/twc_connector.h: -------------------------------------------------------------------------------- 1 | /* 2 | TWC Manager for ESP32 3 | Copyright (C) 2023 Jarl Nicolson 4 | This program is free software; you can redistribute it and/or 5 | modify it under the terms of the GNU General Public License 6 | as published by the Free Software Foundation; either version 3 7 | of the License, or (at your option) any later version. 8 | This program is distributed in the hope that it will be useful, 9 | but WITHOUT ANY WARRANTY; without even the implied warranty of 10 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 | GNU General Public License for more details. 12 | You should have received a copy of the GNU General Public License 13 | along with this program. If not, see . 14 | */ 15 | 16 | #pragma once 17 | 18 | #include 19 | #include 20 | 21 | #include "esphome/core/log.h" 22 | 23 | namespace esphome { 24 | namespace twc_controller { 25 | // Encapsulate some information specific to a single wall connector. This is to allow multiple connectors to be added 26 | class TeslaConnector { 27 | public: 28 | TeslaConnector(uint16_t twcid, uint8_t max_charge_rate); 29 | void SetVin(uint8_t* upperVin); 30 | uint8_t* GetVin(); 31 | void SetActualCurrent(uint8_t current); 32 | uint8_t GetActualCurrent(); 33 | uint8_t GetPhaseCurrent(uint8_t phase); 34 | 35 | uint16_t twcid; 36 | uint8_t state; 37 | uint8_t firmware_version[4]; 38 | 39 | uint8_t serial_number[11]; 40 | 41 | uint32_t total_kwh; 42 | uint16_t phase1_voltage; 43 | uint16_t phase2_voltage; 44 | uint16_t phase3_voltage; 45 | 46 | uint8_t phase1_current; 47 | uint8_t phase2_current; 48 | uint8_t phase3_current; 49 | 50 | uint8_t max_allowable_current; 51 | private: 52 | uint8_t vin_[18]; 53 | uint8_t actual_current_; 54 | 55 | }; 56 | } 57 | } -------------------------------------------------------------------------------- /components/twc-controller/twc_controller.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | TWC Manager for ESP32 3 | Copyright (C) 2023 Jarl Nicolson 4 | This program is free software; you can redistribute it and/or 5 | modify it under the terms of the GNU General Public License 6 | as published by the Free Software Foundation; either version 3 7 | of the License, or (at your option) any later version. 8 | This program is distributed in the hope that it will be useful, 9 | but WITHOUT ANY WARRANTY; without even the implied warranty of 10 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 | GNU General Public License for more details. 12 | You should have received a copy of the GNU General Public License 13 | along with this program. If not, see . 14 | */ 15 | 16 | #include "esphome/core/log.h" 17 | 18 | #include "twc_controller.h" 19 | 20 | namespace esphome { 21 | namespace twc_controller { 22 | static const char *TAG = "twc"; 23 | 24 | void TWCController::setup() { 25 | if (this->flow_control_pin_ != nullptr) { 26 | this->flow_control_pin_->setup(); 27 | } 28 | 29 | this->publish_state(this->min_current_); 30 | 31 | teslaController_ = new TeslaController(this->parent_, this, twcid_, flow_control_pin_, passive_mode_); 32 | 33 | teslaController_->SetMinCurrent(this->min_current_); 34 | teslaController_->SetMaxCurrent(this->max_current_); 35 | 36 | teslaController_->Begin(); 37 | teslaController_->Startup(); 38 | } 39 | 40 | void TWCController::loop() { 41 | teslaController_->Handle(); 42 | 43 | } 44 | 45 | /* IO Functions */ 46 | void TWCController::resetIO(uint16_t twcid) { 47 | // Write 0's to MQTT for each topic which has 0 as a valid value. This is because 48 | // we compare the old and new values and by default everything is 0 so it never writes 49 | // anything. This way we start at 0 and immediately update to the real value if there is 50 | // one, or stay at 0 (which is correct) if there isn't. 51 | writeChargerVoltage(twcid, 0, 1); 52 | writeChargerVoltage(twcid, 0, 2); 53 | writeChargerVoltage(twcid, 0, 3); 54 | 55 | writeChargerCurrent(twcid, 0, 1); 56 | writeChargerCurrent(twcid, 0, 2); 57 | writeChargerCurrent(twcid, 0, 3); 58 | 59 | writeChargerActualCurrent(twcid, 0); 60 | 61 | writeChargerConnectedVin(twcid, "0"); 62 | 63 | writeChargerState(twcid, 0); 64 | writeTotalConnectedCars(0); 65 | } 66 | 67 | void TWCController::writeActualCurrent(uint8_t actualCurrent) { 68 | this->current_sensor_->publish_state((float)actualCurrent); 69 | } 70 | 71 | void TWCController::writeCharger(uint16_t twcid, uint8_t max_allowable_current) { 72 | this->max_allowable_current_sensor_->publish_state((float)max_allowable_current); 73 | } 74 | 75 | void TWCController::writeChargerCurrent(uint16_t twcid, uint8_t current, uint8_t phase) { 76 | switch (phase) { 77 | case 1: 78 | this->phase_1_current_sensor_->publish_state((float)current); 79 | break; 80 | case 2: 81 | this->phase_2_current_sensor_->publish_state((float)current); 82 | break; 83 | case 3: 84 | this->phase_3_current_sensor_->publish_state((float)current); 85 | break; 86 | default: 87 | ESP_LOGE(TAG, "Phase should be 3 or less"); 88 | return; 89 | } 90 | }; 91 | 92 | void TWCController::writeChargerSerial(uint16_t twcid, std::string serial) { 93 | this->serial_text_sensor_->publish_state(serial); 94 | } 95 | 96 | void TWCController::writeChargerTotalKwh(uint16_t twcid, uint32_t total_kwh) { 97 | this->total_kwh_delivered_sensor_->publish_state((float)total_kwh); 98 | } 99 | 100 | void TWCController::writeChargerVoltage(uint16_t twcid, uint16_t voltage, uint8_t phase) { 101 | switch (phase) { 102 | case 1: 103 | this->phase_1_voltage_sensor_->publish_state((float)voltage); 104 | break; 105 | case 2: 106 | this->phase_2_voltage_sensor_->publish_state((float)voltage); 107 | break; 108 | case 3: 109 | this->phase_3_voltage_sensor_->publish_state((float)voltage); 110 | break; 111 | default: 112 | ESP_LOGE(TAG, "Phase should be 3 or less"); 113 | return; 114 | } 115 | } 116 | 117 | void TWCController::writeTotalConnectedChargers(uint8_t connected_chargers) { 118 | 119 | }; 120 | 121 | void TWCController::writeChargerFirmware(uint16_t twcid, std::string firmware_version) { 122 | this->firmware_version_text_sensor_->publish_state(firmware_version); 123 | }; 124 | 125 | void TWCController::writeChargerActualCurrent(uint16_t twcid, uint8_t current) { 126 | this->actual_current_sensor_->publish_state((float)current); 127 | } 128 | 129 | void TWCController::writeChargerTotalPhaseCurrent(uint8_t current, uint8_t phase) { 130 | 131 | } 132 | 133 | void TWCController::writeChargerConnectedVin(uint16_t twcid, std::string vin) { 134 | this->connected_vin_text_sensor_->publish_state(vin); 135 | } 136 | 137 | void TWCController::writeChargerState(uint16_t twcid, uint8_t state) { 138 | this->state_sensor_->publish_state((float)state); 139 | } 140 | 141 | void TWCController::writeTotalConnectedCars(uint8_t connected_cars) { 142 | 143 | } 144 | 145 | void TWCController::writeRaw(uint8_t *data, size_t length) { 146 | 147 | } 148 | 149 | void TWCController::writeRawPacket(uint8_t *data, size_t length) { 150 | 151 | } 152 | 153 | void TWCController::onCurrentMessage(std::function callback) { 154 | onCurrentMessageCallback_ = callback; 155 | } 156 | 157 | 158 | /* End IO Functions */ 159 | 160 | void TWCController::dump_config() { 161 | ESP_LOGCONFIG(TAG, "TWC Controller:"); 162 | this->print_params_(); 163 | } 164 | 165 | void TWCController::print_params_() { 166 | ESP_LOGCONFIG(TAG," TWC ID: 0x%s", format_hex(this->twcid_).c_str()); 167 | ESP_LOGCONFIG(TAG," Min Current: %d", this->min_current_); 168 | ESP_LOGCONFIG(TAG," Max Current: %d", this->max_current_); 169 | LOG_PIN(" Flow Control Pin: ", this->flow_control_pin_); 170 | } 171 | 172 | void TWCController::set_min_current(uint8_t current) { 173 | ESP_LOGD(TAG, "Set min current"); 174 | this->min_current_ = current; 175 | } 176 | 177 | void TWCController::set_max_current(uint8_t current) { 178 | ESP_LOGD(TAG, "Set max current"); 179 | this->max_current_ = current; 180 | } 181 | 182 | void TWCController::set_twcid(uint16_t twcid) { 183 | ESP_LOGD(TAG, "Set TWC ID"); 184 | this->twcid_ = twcid; 185 | } 186 | 187 | void TWCController::control(float value) { 188 | this->onCurrentMessageCallback_(round(value)); 189 | this->publish_state(value); 190 | } 191 | } 192 | } 193 | -------------------------------------------------------------------------------- /components/twc-controller/twc_controller.h: -------------------------------------------------------------------------------- 1 | /* 2 | TWC Manager for ESP32 3 | Copyright (C) 2023 Jarl Nicolson 4 | This program is free software; you can redistribute it and/or 5 | modify it under the terms of the GNU General Public License 6 | as published by the Free Software Foundation; either version 3 7 | of the License, or (at your option) any later version. 8 | This program is distributed in the hope that it will be useful, 9 | but WITHOUT ANY WARRANTY; without even the implied warranty of 10 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 | GNU General Public License for more details. 12 | You should have received a copy of the GNU General Public License 13 | along with this program. If not, see . 14 | */ 15 | 16 | #pragma once 17 | 18 | #include "esphome/core/component.h" 19 | #include "esphome/core/entity_base.h" 20 | #include "esphome/components/api/custom_api_device.h" 21 | #include "esphome/components/sensor/sensor.h" 22 | #include "esphome/components/text_sensor/text_sensor.h" 23 | #include "esphome/components/uart/uart.h" 24 | 25 | #include "twc_protocol.h" 26 | #include "io.h" 27 | 28 | namespace esphome { 29 | namespace twc_controller { 30 | 31 | class TWCController : public number::Number, public uart::UARTDevice, public Component, public TeslaControllerIO { 32 | public: 33 | void setup() override; 34 | void loop() override; 35 | void dump_config() override; 36 | 37 | float get_setup_priority() const override { 38 | return esphome::setup_priority::AFTER_CONNECTION; 39 | } 40 | 41 | void set_min_current(uint8_t current); 42 | void set_max_current(uint8_t current); 43 | void set_twcid(uint16_t); 44 | 45 | void set_passive_mode(int passive_mode) { this->passive_mode_ = passive_mode; } 46 | void set_flow_control_pin(GPIOPin *flow_control_pin) { this->flow_control_pin_ = flow_control_pin; } 47 | 48 | SUB_SENSOR(current) 49 | SUB_SENSOR(max_allowable_current) 50 | SUB_SENSOR(total_kwh_delivered) 51 | SUB_SENSOR(phase_1_voltage) 52 | SUB_SENSOR(phase_2_voltage) 53 | SUB_SENSOR(phase_3_voltage) 54 | SUB_SENSOR(phase_1_current) 55 | SUB_SENSOR(phase_2_current) 56 | SUB_SENSOR(phase_3_current) 57 | SUB_SENSOR(actual_current) 58 | SUB_SENSOR(state) 59 | 60 | SUB_TEXT_SENSOR(serial) 61 | SUB_TEXT_SENSOR(firmware_version) 62 | SUB_TEXT_SENSOR(connected_vin) 63 | 64 | /* IO Functions */ 65 | void resetIO(uint16_t); 66 | void writeActualCurrent(uint8_t actualCurrent); 67 | void writeCharger(uint16_t, uint8_t); 68 | void writeChargerCurrent(uint16_t, uint8_t, uint8_t); 69 | void writeChargerSerial(uint16_t, std::string); 70 | void writeChargerTotalKwh(uint16_t, uint32_t); 71 | void writeChargerVoltage(uint16_t, uint16_t, uint8_t); 72 | void writeTotalConnectedChargers(uint8_t); 73 | void writeChargerFirmware(uint16_t, std::string); 74 | void writeChargerActualCurrent(uint16_t, uint8_t); 75 | void writeChargerTotalPhaseCurrent(uint8_t, uint8_t); 76 | void writeChargerConnectedVin(uint16_t, std::string); 77 | void writeChargerState(uint16_t, uint8_t); 78 | void writeTotalConnectedCars(uint8_t); 79 | void writeRaw(uint8_t*, size_t); 80 | void writeRawPacket(uint8_t *data, size_t length); 81 | void onCurrentMessage(std::function); 82 | 83 | /* End IO Functions */ 84 | protected: 85 | GPIOPin *flow_control_pin_{nullptr}; 86 | void print_params_(); 87 | void control(float value); 88 | 89 | TeslaController *teslaController_; 90 | std::function onCurrentMessageCallback_=nullptr; 91 | uint8_t min_current_; 92 | uint8_t max_current_; 93 | uint16_t twcid_; 94 | uint8_t passive_mode_; 95 | }; 96 | 97 | } 98 | } 99 | -------------------------------------------------------------------------------- /components/twc-controller/twc_protocol.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | TWC Manager for ESP32 3 | Copyright (C) 2020 Craig Peacock 4 | Copyright (C) 2020 Jarl Nicolson 5 | This program is free software; you can redistribute it and/or 6 | modify it under the terms of the GNU General Public License 7 | as published by the Free Software Foundation; either version 3 8 | of the License, or (at your option) any later version. 9 | This program is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU General Public License for more details. 13 | You should have received a copy of the GNU General Public License 14 | along with this program. If not, see . 15 | */ 16 | 17 | //#include 18 | 19 | #include 20 | #include 21 | 22 | #include "twc_controller.h" 23 | #include "twc_protocol.h" 24 | #include "functions.h" 25 | 26 | namespace esphome { 27 | namespace twc_controller { 28 | static const char *TAG = "twc.protocol"; 29 | 30 | TeslaController::TeslaController(uart::UARTComponent* serial, TeslaControllerIO *io, uint16_t twcid, GPIOPin *flow_control_pin, int passive_mode) : 31 | serial_(serial), 32 | flow_control_pin_(flow_control_pin), 33 | controller_io_(io), 34 | num_connected_chargers_(0), 35 | twcid_(twcid), 36 | sign_(0x77), 37 | max_current_(0), 38 | min_current_(0), 39 | stopstart_delay_(0), 40 | debug_(false), 41 | passive_mode_(passive_mode) 42 | { 43 | } 44 | 45 | void TeslaController::Begin() { 46 | ESP_LOGD(TAG, "Starting Tesla Controller... "); 47 | 48 | // Register callbacks for IO 49 | controller_io_->onCurrentMessage([this](uint8_t current){ this->SetCurrent(current); }); 50 | 51 | receive_index_ = 0; 52 | if (this->flow_control_pin_ != nullptr) 53 | this->flow_control_pin_->digital_write(false); 54 | } 55 | 56 | 57 | // This method is called in arduino setup() to start the main controller loop (a FreeRTOS task) 58 | void TeslaController::Startup() { 59 | ESP_LOGD(TAG, "Starting up Tesla Controller task as primary... "); 60 | xTaskCreate(this->startupTask_, "TeslaControllerTask", 2048, this, 1, NULL); 61 | } 62 | 63 | // This is a static method which is just used as the FreeRTOS task which sends 64 | // the presence startup messages (5 * Presence 1, 5 * Presence 2) 65 | void TeslaController::startupTask_(void *pvParameter) { 66 | 67 | TeslaController* twc = static_cast(pvParameter); 68 | 69 | while (twc->passive_mode_) 70 | vTaskDelay(1000+random(100,200)/portTICK_PERIOD_MS); 71 | 72 | 73 | for (uint8_t i = 0; i < 5; i++) { 74 | twc->SendPresence(); 75 | vTaskDelay(1000/portTICK_PERIOD_MS); 76 | }; 77 | 78 | for (uint8_t i = 0; i < 5; i++) { 79 | twc->SendPresence2(); 80 | vTaskDelay(1000/portTICK_PERIOD_MS); 81 | }; 82 | 83 | uint8_t commandNumber = 0; 84 | 85 | for (;;) { 86 | if (twc->ChargersConnected() > 0) { 87 | for (uint8_t i = 0; i < twc->ChargersConnected(); i++) { 88 | twc->SendHeartbeat(twc->chargers[i]->twcid); 89 | if (twc->current_changed_ == true) { twc->current_changed_ = false; }; 90 | 91 | vTaskDelay(500+random(50,100)/portTICK_PERIOD_MS); 92 | 93 | switch (commandNumber) { 94 | case 0: 95 | twc->SendCommand(GET_VIN_FIRST, twc->chargers[i]->twcid); 96 | break; 97 | case 1: 98 | twc->SendCommand(GET_VIN_MIDDLE, twc->chargers[i]->twcid); 99 | break; 100 | case 2: 101 | twc->SendCommand(GET_VIN_LAST, twc->chargers[i]->twcid); 102 | break; 103 | case 3: 104 | twc->SendCommand(GET_SERIAL_NUMBER, twc->chargers[i]->twcid); 105 | break; 106 | case 4: 107 | twc->SendCommand(GET_PWR_STATE, twc->chargers[i]->twcid); 108 | break; 109 | case 5: 110 | twc->SendCommand(GET_FIRMWARE_VER_EXT, twc->chargers[i]->twcid); 111 | break; 112 | } 113 | vTaskDelay(1000+random(100,200)/portTICK_PERIOD_MS); 114 | } 115 | 116 | if (commandNumber >= 5) { 117 | commandNumber = 0; 118 | } else { 119 | commandNumber++; 120 | }; 121 | 122 | } else { 123 | vTaskDelay(1000+random(100,200)/portTICK_PERIOD_MS); 124 | } 125 | } 126 | 127 | // This should never be reached, but just in case, make sure the task is cleaned up 128 | vTaskDelete(NULL); 129 | } 130 | 131 | // This is run via the main arduino loop() to actually receive data and do something with it 132 | void TeslaController::Handle() { 133 | uint8_t receivedChar; 134 | 135 | while (serial_->available()) { 136 | serial_->read_byte(&receivedChar); 137 | 138 | if (receive_index_ > MAX_PACKET_LENGTH-1) { 139 | ESP_LOGE(TAG, "Packet length exceeded"); 140 | receive_index_ = 0; 141 | return; 142 | } 143 | 144 | switch (receivedChar) { 145 | case SLIP_END: 146 | if (message_started_) { 147 | if (receive_index_ <= 2) { 148 | // TODO: can this be improved? It seems a bit arbitary to just try and 149 | // detect small packets as errors. The byte after the end frame always seems 150 | // to be a fairly high number (>= 0xFC). I'm guessing it's meant to be 0xFF but 151 | // the last 1-2 bits are being dropped. Maybe a better way would be to see if there is a 152 | // byte > 0xF0 but this could be caught out by data corruption too. 153 | 154 | // It's likely there was a corrupt start frame and so we're flipped 155 | // and thinking that the end is the start instead. Reset this to be the start 156 | receive_index_ = 0; 157 | break; 158 | } 159 | ProcessPacket(receive_buffer_, receive_index_); 160 | 161 | message_started_ = false; 162 | receive_index_ = 0; 163 | break; 164 | } else { 165 | message_started_ = true; 166 | receive_index_ = 0; 167 | } 168 | break; 169 | 170 | case SLIP_ESC: 171 | // Use readBytes rather than read so that this blocks. Previously using 172 | // read, it would try to read too fast before the secondary had sent the next 173 | // byte and this would fall through to default. This meant bytes were not being 174 | // decoded and the next character was appearing in the packet rather than the 175 | // decoded character. 176 | 177 | // Check if readBytes returned 1 character. If it didn't, it means 178 | // the timeout was hit and therefore this should be discarded (dropping) 179 | // the whole packet 180 | if (serial_->read_array(&receivedChar, 1) != 1) { 181 | ESP_LOGE(TAG, "Error while receiving packet data for a packet"); 182 | return; 183 | } 184 | 185 | switch (receivedChar) { 186 | case SLIP_ESC_END: 187 | receive_buffer_[receive_index_++] = SLIP_END; 188 | break; 189 | 190 | case SLIP_ESC_ESC: 191 | receive_buffer_[receive_index_++] = SLIP_ESC; 192 | break; 193 | 194 | default: 195 | break; 196 | // TODO: This should be an error 197 | } 198 | break; 199 | 200 | default: 201 | if (message_started_) { 202 | receive_buffer_[receive_index_++] = receivedChar; 203 | } // else disgard - probably corruption or started receiving 204 | // in the middle of a message 205 | } 206 | } 207 | } 208 | 209 | void TeslaController::Debug(bool enabled) { 210 | if (enabled) { 211 | ESP_LOGD(TAG, "Enabling Debug"); 212 | } else { 213 | ESP_LOGD(TAG, "Disabling Debug"); 214 | } 215 | debug_ = enabled; 216 | } 217 | 218 | void TeslaController::GetSerial(uint16_t secondary_twcid) { 219 | SendCommand(GET_SERIAL_NUMBER, secondary_twcid); 220 | } 221 | 222 | void TeslaController::GetFirmwareVer(uint16_t secondary_twcid) { 223 | SendCommand(GET_FIRMWARE_VER, secondary_twcid); 224 | } 225 | 226 | void TeslaController::GetPowerStatus(uint16_t secondary_twcid) { 227 | SendCommand(GET_FIRMWARE_VER, secondary_twcid); 228 | }; 229 | 230 | void TeslaController::GetVin(uint16_t secondary_twcid) { 231 | SendCommand(GET_VIN_FIRST, secondary_twcid); 232 | SendCommand(GET_VIN_MIDDLE, secondary_twcid); 233 | SendCommand(GET_VIN_LAST, secondary_twcid); 234 | } 235 | 236 | void TeslaController::SetCurrent(uint8_t current) { 237 | if (available_current_ != current) { 238 | ESP_LOGD(TAG, "Received current change message, new current %d\r\n", current); 239 | current_changed_ = true; 240 | } 241 | 242 | // If the available current is higher than the maximum for our charger, 243 | // clamp it to the maximum 244 | available_current_ = clamp(current, min_current_, max_current_); 245 | /*if (current <= MAX_CURRENT & current >= MIN_CURRENT) { 246 | available_current_ = current; 247 | } else if (current > MAX_CURRENT) { 248 | available_current_ = MAX_CURRENT; 249 | } else if (current < MIN_CURRENT) { 250 | available_current_ = MIN_CURRENT; 251 | }*/ 252 | } 253 | 254 | void TeslaController::SendPresence(bool presence2) { 255 | RESP_PACKET_T presence; 256 | PRESENCE_PAYLOAD_T *presence_payload = (PRESENCE_PAYLOAD_T *)&presence.payload; 257 | 258 | presence.command = presence2 ? htons(PRIMARY_PRESENCE2) : htons(PRIMARY_PRESENCE); 259 | presence.twcid = twcid_; 260 | presence_payload->sign = sign_; 261 | presence_payload->max_allowable_current = 0x0C80; // TODO: Repalce this with something not hard coded. 262 | for (uint8_t i = 0; i <= 7; i++) { 263 | presence_payload->padding[i] = 0x00; 264 | } 265 | presence.checksum = CalculateChecksum((uint8_t*)&presence, sizeof(presence)); 266 | 267 | SendData((uint8_t*)&presence, sizeof(presence)); 268 | } 269 | 270 | bool TeslaController::IsCharging() { 271 | if (total_current_ > 0) { 272 | return true; 273 | } else { 274 | return false; 275 | } 276 | } 277 | 278 | void TeslaController::SendPresence2() { 279 | SendPresence(true); 280 | } 281 | 282 | uint8_t TeslaController::ChargersConnected() { 283 | return num_connected_chargers_; 284 | } 285 | 286 | void TeslaController::SendHeartbeat(uint16_t secondary_twcid) { 287 | P_HEARTBEAT_T heartbeat; 288 | heartbeat.command = htons(PRIMARY_HEARTBEAT); 289 | heartbeat.src_twcid = twcid_; 290 | heartbeat.dst_twcid = secondary_twcid; 291 | 292 | if (current_changed_) { 293 | uint16_t encodedMax = available_current_ * 100; 294 | heartbeat.state = 0x09; // Limit power to the value from the next two bytes 295 | 296 | // current * 100 (to get it to a whole number) 297 | heartbeat.max_current = htons(encodedMax); 298 | } else { 299 | heartbeat.state = 0x00; 300 | heartbeat.max_current = 0x00; 301 | } 302 | 303 | heartbeat.plug_inserted = 0x00; 304 | 305 | for (uint8_t i = 0; i < 5; i++) { 306 | heartbeat.padding[i] = 0x00; 307 | } 308 | 309 | heartbeat.checksum = CalculateChecksum((uint8_t*)&heartbeat, sizeof(heartbeat)); 310 | 311 | SendData((uint8_t*)&heartbeat, sizeof(heartbeat)); 312 | } 313 | 314 | void TeslaController::SendCommand(uint16_t command, uint16_t send_to) { 315 | PACKET_T packet; 316 | packet.command = htons(command); 317 | packet.twcid = twcid_; 318 | packet.secondary_twcid = send_to; 319 | for (uint8_t i = 0; i < 6; i++) { 320 | packet.payload[i] = 0x00; 321 | } 322 | packet.checksum = CalculateChecksum((uint8_t*)&packet, sizeof(packet)); 323 | SendData((uint8_t*)&packet, sizeof(packet)); 324 | } 325 | 326 | uint8_t TeslaController::CalculateChecksum(uint8_t *buffer, size_t length) { 327 | uint8_t i; 328 | uint8_t endByte = 0; 329 | uint8_t checksum = 0; 330 | 331 | for (i = 1; i < length; i++) { 332 | checksum = checksum + buffer[i]; 333 | } 334 | 335 | return checksum; 336 | } 337 | 338 | bool TeslaController::VerifyChecksum(uint8_t *buffer, size_t length) { 339 | uint8_t checksum = CalculateChecksum(buffer, length-1); 340 | if (buffer[length-1] == checksum) { 341 | return true; 342 | } 343 | 344 | return false; 345 | } 346 | 347 | void TeslaController::DecodeExtFirmwareVerison(RESP_PACKET_T *firmware_ver) { 348 | EXT_FIRMWARE_PAYLOAD_T *firmware_payload = (EXT_FIRMWARE_PAYLOAD_T *)firmware_ver->payload; 349 | 350 | TeslaConnector *c = GetConnector(firmware_ver->twcid); 351 | 352 | char buffer[10]; 353 | snprintf(buffer, 10, "%d.%d.%d.%d", 354 | firmware_payload->major, 355 | firmware_payload->minor, 356 | firmware_payload->revision, 357 | firmware_payload->extended 358 | ); 359 | 360 | if (memcmp(&c->firmware_version, &firmware_payload, 4) != 0) { 361 | memcpy(&c->firmware_version, &firmware_payload, 4); 362 | controller_io_->writeChargerFirmware(firmware_ver->twcid, std::string(buffer)); 363 | } 364 | 365 | if (debug_) { 366 | ESP_LOGD(TAG, "Decoded: ID: %04x, Firmware Ver: %d.%d.%d.%d\r\n", 367 | firmware_ver->twcid, 368 | firmware_payload->major, 369 | firmware_payload->minor, 370 | firmware_payload->revision, 371 | firmware_payload->extended 372 | ); 373 | } 374 | } 375 | 376 | void TeslaController::DecodeSerialNumber(EXTENDED_RESP_PACKET_T *serial) { 377 | SERIAL_PAYLOAD_T *serial_payload = (SERIAL_PAYLOAD_T *)serial->payload; 378 | 379 | TeslaConnector *c = GetConnector(serial->twcid); 380 | 381 | if (strcmp((const char*)c->serial_number, (const char*)serial_payload->serial) != 0) { 382 | strcpy((char *)&c->serial_number, (const char*)&serial_payload->serial); 383 | controller_io_->writeChargerSerial(serial->twcid, std::string((char*)&c->serial_number)); 384 | } 385 | 386 | 387 | if (debug_) { 388 | ESP_LOGD(TAG, "Decoded: ID: %04x, Serial Number: %s", serial->twcid, std::string((char*)&c->serial_number)); 389 | } 390 | } 391 | 392 | void TeslaController::DecodePowerState(EXTENDED_RESP_PACKET_T *power_state) { 393 | POWERSTATUS_PAYLOAD_T *power_state_payload = (POWERSTATUS_PAYLOAD_T *)power_state->payload; 394 | 395 | TeslaConnector *c = GetConnector(power_state->twcid); 396 | 397 | if (!c) { 398 | if (!passive_mode_) return; 399 | 400 | // Accept the fact that we've missed Primary's presence message. 401 | ESP_LOGD(TAG, "New charger seen - adding to controller. ID: %04x,Max Allowable Current: ?\r\n", 402 | power_state->twcid); 403 | 404 | uint8_t max_allowable_current = 99; 405 | 406 | c = new TeslaConnector(power_state->twcid, max_allowable_current); 407 | chargers[num_connected_chargers_++] = c; 408 | 409 | controller_io_->writeCharger(c->twcid, c->max_allowable_current); 410 | controller_io_->writeTotalConnectedChargers(num_connected_chargers_); 411 | 412 | controller_io_->resetIO(power_state->twcid); 413 | } 414 | 415 | uint32_t total_kwh = ntohl(power_state_payload->total_kwh); 416 | if (total_kwh != c->total_kwh) { 417 | c->total_kwh = total_kwh; 418 | controller_io_->writeChargerTotalKwh(power_state->twcid, total_kwh); 419 | }; 420 | 421 | uint16_t voltage = ntohs(power_state_payload->phase1_voltage); 422 | if (voltage != c->phase1_voltage) { 423 | c->phase1_voltage = voltage; 424 | controller_io_->writeChargerVoltage(power_state->twcid, voltage, 1); 425 | }; 426 | 427 | voltage = ntohs(power_state_payload->phase2_voltage); 428 | if (voltage != c->phase2_voltage) { 429 | c->phase2_voltage = voltage; 430 | controller_io_->writeChargerVoltage(power_state->twcid, voltage, 2); 431 | }; 432 | 433 | voltage = ntohs(power_state_payload->phase3_voltage); 434 | if (voltage != c->phase3_voltage) { 435 | c->phase3_voltage = voltage; 436 | controller_io_->writeChargerVoltage(power_state->twcid, voltage, 3); 437 | }; 438 | 439 | uint8_t current = power_state_payload->phase1_current/2; 440 | if (current != c->phase1_current) { 441 | c->phase1_current = current; 442 | controller_io_->writeChargerCurrent(power_state->twcid, current, 1); 443 | UpdateTotalPhaseCurrent(1); 444 | }; 445 | 446 | current = power_state_payload->phase2_current/2; 447 | if (current != c->phase2_current) { 448 | c->phase2_current = current; 449 | controller_io_->writeChargerCurrent(power_state->twcid, current, 2); 450 | UpdateTotalPhaseCurrent(2); 451 | }; 452 | 453 | current = power_state_payload->phase3_current/2; 454 | if (current != c->phase3_current) { 455 | c->phase3_current = current; 456 | controller_io_->writeChargerCurrent(power_state->twcid, current, 3); 457 | UpdateTotalPhaseCurrent(3); 458 | }; 459 | 460 | if (debug_) { 461 | ESP_LOGD(TAG, "Decoded: ID: %04x, Power State Total kWh %d, Phase Voltages: %d, %d, %d, Phase Currents: %d, %d, %d\r\n", 462 | power_state->twcid, 463 | ntohl(power_state_payload->total_kwh), 464 | ntohs(power_state_payload->phase1_voltage), 465 | ntohs(power_state_payload->phase2_voltage), 466 | ntohs(power_state_payload->phase3_voltage), 467 | power_state_payload->phase1_current, 468 | power_state_payload->phase2_current, 469 | power_state_payload->phase3_current); 470 | } 471 | } 472 | 473 | void TeslaController::DecodePrimaryPresence(RESP_PACKET_T *presence, uint8_t num) { 474 | PRESENCE_PAYLOAD_T *presence_payload = (PRESENCE_PAYLOAD_T *)presence->payload; 475 | 476 | // in case we're passively listening we have to handle primary presence like a secondary 477 | // one.. beacuse we will still get the power status 478 | TeslaConnector *connector = GetConnector(presence->twcid); 479 | 480 | if (!connector) { 481 | ESP_LOGD(TAG, "New charger seen - adding to controller. ID: %04x, Sign: %02x, Max Allowable Current: %d\r\n", 482 | presence->twcid, 483 | presence_payload->sign, 484 | ntohs(presence_payload->max_allowable_current) 485 | ); 486 | 487 | uint8_t max_allowable_current = (uint8_t)(ntohs(presence_payload->max_allowable_current)/100); 488 | 489 | connector = new TeslaConnector(presence->twcid, max_allowable_current); 490 | chargers[num_connected_chargers_++] = connector; 491 | 492 | controller_io_->writeCharger(connector->twcid, connector->max_allowable_current); 493 | controller_io_->writeTotalConnectedChargers(num_connected_chargers_); 494 | 495 | controller_io_->resetIO(presence->twcid); 496 | } 497 | 498 | 499 | if (debug_) { 500 | ESP_LOGD(TAG, "Decoded: Primary Presence %d - ID: %02x, Sign: %02x\r\n", 501 | num, 502 | presence->twcid, 503 | presence_payload->sign 504 | ); 505 | } 506 | } 507 | 508 | void TeslaController::DecodePrimaryHeartbeat(P_HEARTBEAT_T *heartbeat) { 509 | if (debug_) { 510 | ESP_LOGD(TAG, "Decoded: Primary Heartbeat - ID: %02x, To %02x, State %02x, Max Current: %d, Plug Inserted: %02x\r\n", 511 | heartbeat->src_twcid, 512 | heartbeat->dst_twcid, 513 | heartbeat->state, 514 | ntohs(heartbeat->max_current), 515 | heartbeat->plug_inserted 516 | ); 517 | } 518 | 519 | /*S_HEARTBEAT_T reply; 520 | reply.command = SECONDARY_HEARTBEAT; 521 | reply.src_twcid = twcid_ 522 | reply.dst_twcid = heartbeat->src_twcid; 523 | reply.status = 524 | reply.max_current = 525 | reply.actual_current = 526 | for (uint8_t i = 0; i < 4; i++) { 527 | reply.padding[i] = 0x00; 528 | } 529 | 530 | reply.checksum = CalculateChecksum(reply); 531 | 532 | SendData((uint8_t*)&reply, sizeof(reply));*/ 533 | } 534 | 535 | void TeslaController::DecodeSecondaryHeartbeat(S_HEARTBEAT_T *heartbeat) { 536 | if (debug_) { 537 | ESP_LOGD(TAG, "Decoded: Secondary Heartbeat: ID: %02x, To: %02x, Status: %02x, Max Current: %d, Actual Current: %d\r\n", 538 | heartbeat->src_twcid, 539 | heartbeat->dst_twcid, 540 | heartbeat->state, 541 | ntohs(heartbeat->max_current), 542 | ntohs(heartbeat->actual_current) 543 | ); 544 | } 545 | 546 | TeslaConnector *c = GetConnector(heartbeat->src_twcid); 547 | 548 | // If the secondary changes it's state to 4, it's most likely because 549 | // it's about to start charging. Set the current changed flag 550 | // so that we send the max current to the secondary again. 551 | if (c->state != heartbeat->state) { 552 | if (heartbeat->state == 4) { 553 | current_changed_ = true; 554 | } 555 | 556 | c->state = heartbeat->state; 557 | UpdateTotalConnectedCars(); 558 | controller_io_->writeChargerState(heartbeat->src_twcid, c->state); 559 | } 560 | 561 | 562 | // Check whether the current the secondary is charging at has changed. If it has 563 | // force an udpate of the total current being used and update the internal state 564 | uint8_t newCurrent = ntohs(heartbeat->actual_current)/100; 565 | if (newCurrent != c->GetActualCurrent()) { 566 | c->SetActualCurrent(newCurrent); 567 | UpdateTotalActualCurrent(); 568 | controller_io_->writeChargerActualCurrent(heartbeat->src_twcid, newCurrent); 569 | } 570 | } 571 | 572 | void TeslaController::UpdateTotalConnectedCars() { 573 | uint8_t connected_cars = 0; 574 | 575 | for (uint8_t i = 0; i < num_connected_chargers_; i++) { 576 | if (chargers[i]->state != 0) { 577 | connected_cars++; 578 | } 579 | } 580 | 581 | controller_io_->writeTotalConnectedCars(connected_cars); 582 | } 583 | 584 | TeslaConnector * TeslaController::GetConnector(uint16_t twcid) { 585 | for (uint8_t i = 0; i < num_connected_chargers_; i++) { 586 | if (chargers[i]->twcid == twcid) { 587 | return chargers[i]; 588 | } 589 | } 590 | return nullptr; 591 | } 592 | 593 | void TeslaController::DecodeSecondaryPresence(RESP_PACKET_T *presence) { 594 | PRESENCE_PAYLOAD_T *presence_payload = (PRESENCE_PAYLOAD_T *)presence->payload; 595 | 596 | TeslaConnector *connector = GetConnector(presence->twcid); 597 | 598 | if (!connector) { 599 | ESP_LOGD(TAG, "New charger seen - adding to controller. ID: %04x, Sign: %02x, Max Allowable Current: %d\r\n", 600 | presence->twcid, 601 | presence_payload->sign, 602 | ntohs(presence_payload->max_allowable_current) 603 | ); 604 | 605 | uint8_t max_allowable_current = (uint8_t)(ntohs(presence_payload->max_allowable_current)/100); 606 | 607 | connector = new TeslaConnector(presence->twcid, max_allowable_current); 608 | chargers[num_connected_chargers_++] = connector; 609 | 610 | controller_io_->writeCharger(connector->twcid, connector->max_allowable_current); 611 | controller_io_->writeTotalConnectedChargers(num_connected_chargers_); 612 | 613 | controller_io_->resetIO(presence->twcid); 614 | } 615 | } 616 | 617 | void TeslaController::UpdateTotalActualCurrent() { 618 | total_current_ = 0; 619 | for (uint8_t i = 0; i < num_connected_chargers_; i++) { 620 | total_current_ += chargers[i]->GetActualCurrent(); 621 | } 622 | 623 | if (debug_) { 624 | ESP_LOGD(TAG, "Updating actual current to %f\r\n", total_current_); 625 | } 626 | controller_io_->writeActualCurrent(total_current_); 627 | } 628 | 629 | void TeslaController::UpdateTotalPhaseCurrent(uint8_t phase) { 630 | uint8_t phase_current_ = 0; 631 | 632 | for (uint8_t i = 0; i < num_connected_chargers_; i++) { 633 | phase_current_ += chargers[i]->GetPhaseCurrent(phase); 634 | } 635 | 636 | controller_io_->writeChargerTotalPhaseCurrent(phase_current_, phase); 637 | }; 638 | 639 | void TeslaController::DecodeVin(EXTENDED_RESP_PACKET_T *vin_data) { 640 | VIN_PAYLOAD_T *vin_payload = (VIN_PAYLOAD_T *)vin_data->payload; 641 | 642 | TeslaConnector *c = GetConnector(vin_data->twcid); 643 | uint8_t *vin = c->GetVin(); 644 | 645 | bool changed = false; 646 | 647 | switch (ntohs(vin_data->command)) { 648 | case RESP_VIN_FIRST: 649 | if (memcmp(&vin[0], &vin_payload->vin, sizeof(vin_payload->vin)) != 0) { 650 | changed = true; 651 | memcpy(&vin[0], &vin_payload->vin, sizeof(vin_payload->vin)); 652 | } 653 | break; 654 | case RESP_VIN_MIDDLE: 655 | if (memcmp(&vin[7], &vin_payload->vin, sizeof(vin_payload->vin)) != 0) { 656 | changed = true; 657 | memcpy(&vin[7], &vin_payload->vin, sizeof(vin_payload->vin)); 658 | } 659 | break; 660 | case RESP_VIN_LAST: 661 | if (memcmp(&vin[14], &vin_payload->vin, 3) != 0) { 662 | changed = true; 663 | memcpy(&vin[14], &vin_payload->vin, 3); 664 | } 665 | break; 666 | } 667 | 668 | if (changed && (strlen((const char*)vin) == 17)) { 669 | controller_io_->writeChargerConnectedVin(vin_data->twcid, std::string((char *)vin)); 670 | } else if (changed && strlen((const char*)vin) == 0) { 671 | controller_io_->writeChargerConnectedVin(vin_data->twcid, "0"); 672 | } 673 | 674 | if (debug_) { 675 | if (strlen((const char*)vin_payload->vin) == 0) { 676 | ESP_LOGD(TAG, "No Car Connected"); 677 | } else { 678 | ESP_LOGD(TAG, "VIN: %s", std::string((char *)vin_payload->vin)); 679 | } 680 | 681 | } 682 | 683 | } 684 | 685 | // Process a fully received packet (i.e. data with C0 on each end) 686 | void TeslaController::ProcessPacket(uint8_t *packet, size_t length) { 687 | if (debug_) { 688 | ESP_LOGD(TAG, "Recieved Packet: "); 689 | controller_io_->writeRawPacket(packet, length); 690 | } 691 | 692 | if (!VerifyChecksum(packet, length)) { 693 | ESP_LOGD(TAG, "Error processing packet - checksum verify failed. Full packet: "); 694 | 695 | std::string res; 696 | 697 | char buf[5]; 698 | for (uint8_t i = 0; i < length; i++) { 699 | if (i > 0) { 700 | res += ":"; 701 | } 702 | sprintf(buf, "%02X", packet[i]); 703 | res += buf; 704 | } 705 | 706 | ESP_LOGD(TAG, "%s", res.c_str()); 707 | return; 708 | } 709 | 710 | uint16_t command = ((uint16_t)packet[0]<<8) | packet[1]; 711 | 712 | switch (command) { 713 | case PRIMARY_PRESENCE: 714 | DecodePrimaryPresence((RESP_PACKET_T *)packet, 1); 715 | break; 716 | case PRIMARY_PRESENCE2: 717 | DecodePrimaryPresence((RESP_PACKET_T *)packet, 2); 718 | break; 719 | case SECONDARY_PRESENCE: 720 | DecodeSecondaryPresence((RESP_PACKET_T *)packet); 721 | break; 722 | case SECONDARY_HEARTBEAT: 723 | DecodeSecondaryHeartbeat((S_HEARTBEAT_T *)packet); 724 | break; 725 | case RESP_VIN_FIRST: 726 | case RESP_VIN_MIDDLE: 727 | case RESP_VIN_LAST: 728 | DecodeVin((EXTENDED_RESP_PACKET_T *)packet); 729 | break; 730 | case RESP_PWR_STATUS: 731 | DecodePowerState((EXTENDED_RESP_PACKET_T *)packet); 732 | break; 733 | case RESP_FIRMWARE_VER_EXT: 734 | DecodeExtFirmwareVerison((RESP_PACKET_T *)packet); 735 | break; 736 | case RESP_SERIAL_NUMBER: 737 | DecodeSerialNumber((EXTENDED_RESP_PACKET_T *)packet); 738 | break; 739 | // The next commands would normally be sent by a primary so we won't receive them 740 | // unless we're pretending to be a secondary (i.e. for debugging) 741 | case PRIMARY_HEARTBEAT: 742 | DecodePrimaryHeartbeat((P_HEARTBEAT_T *)packet); 743 | break; 744 | case GET_VIN_FIRST: 745 | case GET_VIN_MIDDLE: 746 | case GET_VIN_LAST: 747 | //DecodeGetVin((PACKET_T*)packet) 748 | break; 749 | default: 750 | ESP_LOGD(TAG, "Unknown packet type received: %#02x: 0x", command); 751 | break; 752 | } 753 | } 754 | 755 | void TeslaController::SendDataFromString(const uint8_t *dataString, size_t length) { 756 | uint8_t buffer[MAX_PACKET_LENGTH]; 757 | uint8_t packetSize = hexCharacterStringToBytes(buffer, dataString, length); 758 | 759 | SendData(buffer, packetSize); 760 | } 761 | 762 | void TeslaController::SendData(uint8_t *packet, size_t length) { 763 | uint8_t outputBuffer[MAX_PACKET_LENGTH]; 764 | uint8_t i; 765 | uint8_t j = 0; 766 | 767 | if (length > MAX_PACKET_LENGTH) { 768 | ESP_LOGD(TAG, "Error - packet larger than maximum allowable size!"); 769 | return; 770 | } 771 | 772 | uint16_t command = ((uint16_t)packet[0]<<8) | packet[1]; 773 | switch (command) { 774 | case WRITE_ID_DATE: 775 | case WRITE_MODEL_NO: 776 | ESP_LOGD(TAG, "WARNING! WRITE COMMANDS ATTEMPTED! THESE CAN PERMANENTLY BREAK YOUR TWC. COMMANDS BLOCKED!"); 777 | return; 778 | } 779 | 780 | // Could probably get rid of the buffer and write directly to the serial port 781 | // but this way lets the value of the buffer be printed for debugging more easily 782 | outputBuffer[j++] = SLIP_END; 783 | for (i = 0; i < length; i++) { 784 | switch (packet[i]) { 785 | case SLIP_END: 786 | outputBuffer[j++] = SLIP_ESC; 787 | outputBuffer[j++] = SLIP_ESC_END; 788 | break; 789 | case SLIP_ESC: 790 | outputBuffer[j++] = SLIP_ESC; 791 | outputBuffer[j++] = SLIP_ESC_ESC; 792 | break; 793 | default: 794 | outputBuffer[j++] = packet[i]; 795 | } 796 | } 797 | outputBuffer[j++] = SLIP_END; 798 | outputBuffer[j++] = 0xFF; 799 | 800 | if (debug_) { 801 | ESP_LOGV(TAG, "Sent packet: "); 802 | for (uint8_t i = 0; i < j; i++) { 803 | ESP_LOGD(TAG, "%02x", outputBuffer[i]); 804 | } 805 | 806 | } 807 | 808 | if (this->flow_control_pin_ != nullptr) 809 | this->flow_control_pin_->digital_write(true); 810 | 811 | serial_->write_array(outputBuffer, j); 812 | serial_->flush(); // Make sure the serial data has finished sending before putting the RS485 transceiver back into receive mode 813 | 814 | if (this->flow_control_pin_ != nullptr) 815 | this->flow_control_pin_->digital_write(false); 816 | } 817 | 818 | void TeslaController::SetMaxCurrent(uint8_t max_current) { 819 | ESP_LOGD(TAG, "Setting maximum current to %d\r\n", max_current); 820 | max_current_ = max_current; 821 | } 822 | 823 | void TeslaController::SetMinCurrent(uint8_t min_current) { 824 | ESP_LOGD(TAG, "Setting minimum current to %d\r\n", min_current); 825 | min_current_ = min_current; 826 | }; 827 | } 828 | } 829 | -------------------------------------------------------------------------------- /components/twc-controller/twc_protocol.h: -------------------------------------------------------------------------------- 1 | /* 2 | TWC Manager for ESP32 3 | Copyright (C) 2020 Craig Peacock 4 | Copyright (C) 2020 Jarl Nicolson 5 | This program is free software; you can redistribute it and/or 6 | modify it under the terms of the GNU General Public License 7 | as published by the Free Software Foundation; either version 3 8 | of the License, or (at your option) any later version. 9 | This program is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU General Public License for more details. 13 | You should have received a copy of the GNU General Public License 14 | along with this program; if not, write to the Free Software 15 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 16 | */ 17 | 18 | #pragma once 19 | 20 | #include "esphome/core/log.h" 21 | #include "esphome/core/helpers.h" 22 | 23 | #include "esphome/components/uart/uart_component.h" 24 | 25 | #include "twc_connector.h" 26 | #include "io.h" 27 | 28 | #define MAX_PACKET_LENGTH 32 29 | 30 | #define GET_SERIAL_NUMBER_OLD 0xFB19 31 | #define GET_MODEL_NUMBER 0xFB1A 32 | #define GET_FIRMWARE_VER 0xFB1B 33 | #define GET_PLUG_STATE 0xFBB4 34 | 35 | #define PRIMARY_HEARTBEAT 0xFBE0 36 | #define PRIMARY_PRESENCE2 0xFBE2 37 | 38 | #define GET_PWR_STATE 0xFBEB 39 | #define GET_FIRMWARE_VER_EXT 0xFBEC 40 | #define GET_SERIAL_NUMBER 0xFBED 41 | #define GET_VIN_FIRST 0xFBEE 42 | #define GET_VIN_MIDDLE 0xFBEF 43 | #define GET_VIN_LAST 0xFBF1 44 | 45 | // The next two commands are ** DANGEROUS ** ! 46 | // DO NOT USE THESE! They are defined so that 47 | // they can be blocked. 48 | #define WRITE_ID_DATE 0xFC19 49 | #define WRITE_MODEL_NO 0xFC1A 50 | 51 | // Commands without responses (0xFC) 52 | #define IDLE_MESSAGE 0xFC1D 53 | #define START_CHARGING 0xFCB1 54 | #define STOP_CHARGING 0xFCB2 55 | #define PRIMARY_PRESENCE 0xFCE1 56 | 57 | // Responses (0xFD) 58 | #define RESP_SERIAL_NUMBER_OLD 0xFD19 59 | #define RESP_MODEL_NUMBER 0xFD1A 60 | #define RESP_FIRMWARE_VER 0xFD1B 61 | #define RESP_PLUG_STATE 0xFDB4 62 | 63 | #define SECONDARY_HEARTBEAT 0xFDE0 64 | 65 | #define SECONDARY_PRESENCE 0xFDE2 // Sent by secondary on reset 66 | #define RESP_PWR_STATUS 0xFDEB // Sent by primary on reset 67 | #define RESP_FIRMWARE_VER_EXT 0xFDEC 68 | #define RESP_SERIAL_NUMBER 0xFDED 69 | #define RESP_VIN_FIRST 0xFDEE 70 | #define RESP_VIN_MIDDLE 0xFDEF 71 | #define RESP_VIN_LAST 0xFDF1 72 | 73 | // Commands are SLIP encoded on the wire - need the SLIP constants 74 | #define SLIP_END 0xC0 75 | #define SLIP_ESC 0xDB 76 | #define SLIP_ESC_END 0xDC 77 | #define SLIP_ESC_ESC 0xDD 78 | 79 | namespace esphome { 80 | namespace twc_controller { 81 | 82 | struct PACKET_T { 83 | uint16_t command; 84 | uint16_t twcid; 85 | uint16_t secondary_twcid; 86 | uint8_t payload[6]; 87 | uint8_t checksum; 88 | } PACKED; 89 | 90 | struct RESP_PACKET_T { 91 | uint16_t command; 92 | uint16_t twcid; 93 | uint8_t payload[11]; 94 | uint8_t checksum; 95 | } PACKED; 96 | 97 | struct EXTENDED_RESP_PACKET_T { 98 | uint16_t command; 99 | uint16_t twcid; 100 | uint8_t payload[15]; 101 | uint8_t checksum; 102 | } PACKED; 103 | 104 | struct S_HEARTBEAT_T { 105 | uint16_t command; 106 | uint16_t src_twcid; 107 | uint16_t dst_twcid; 108 | uint8_t state; 109 | uint16_t max_current; 110 | uint16_t actual_current; 111 | uint8_t padding[4]; 112 | uint8_t checksum; 113 | } PACKED; 114 | 115 | struct P_HEARTBEAT_T { 116 | uint16_t command; 117 | uint16_t src_twcid; 118 | uint16_t dst_twcid; 119 | uint8_t state; 120 | uint16_t max_current; 121 | uint8_t plug_inserted; 122 | uint8_t padding[5]; 123 | uint8_t checksum; 124 | } PACKED; 125 | 126 | // Standard response packet payload 127 | struct PRESENCE_PAYLOAD_T { 128 | uint8_t sign; 129 | uint16_t max_allowable_current; 130 | uint8_t padding[8]; 131 | } PACKED; 132 | 133 | // Extended response packet payload 134 | struct POWERSTATUS_PAYLOAD_T { 135 | uint32_t total_kwh; 136 | uint16_t phase1_voltage; 137 | uint16_t phase2_voltage; 138 | uint16_t phase3_voltage; 139 | uint8_t phase1_current; 140 | uint8_t phase2_current; 141 | uint8_t phase3_current; 142 | uint8_t padding[2]; 143 | } PACKED; 144 | 145 | // Extended response packet payload 146 | struct VIN_PAYLOAD_T { 147 | uint8_t vin[7]; 148 | uint8_t padding[8]; 149 | } PACKED; 150 | 151 | // Extended response packet payload 152 | struct SERIAL_PAYLOAD_T { 153 | uint8_t serial[11]; 154 | uint8_t padding[4]; 155 | } PACKED; 156 | 157 | // Standard response packet Payload 158 | struct EXT_FIRMWARE_PAYLOAD_T { 159 | uint8_t major; 160 | uint8_t minor; 161 | uint8_t revision; 162 | uint8_t extended; 163 | uint8_t padding[7]; 164 | } PACKED; 165 | 166 | class TeslaController { 167 | public: 168 | TeslaController(uart::UARTComponent* serial, TeslaControllerIO *io, uint16_t twcid, GPIOPin *flow_control_pin, int passive_mode); 169 | 170 | void Begin(); 171 | void GetPowerStatus(uint16_t secondary_twcid); 172 | void GetFirmware(uint16_t secondary_twcid); 173 | void GetSerial(uint16_t secondary_twcid); 174 | void GetFirmwareVer(uint16_t secondary_twcid); 175 | void GetVin(uint16_t secondary_twcid); 176 | void Handle(); 177 | void SendCommand(uint16_t command, uint16_t send_to); 178 | void SendPresence(bool presence2 = false); 179 | void SendPresence2(); 180 | void SendHeartbeat(uint16_t secondary_twcid); 181 | void SendIdle(); 182 | void Startup(); 183 | void SendData(uint8_t *packet, size_t length); 184 | void DecodePowerState(EXTENDED_RESP_PACKET_T *power_state); 185 | void DecodePrimaryPresence(RESP_PACKET_T *presence, uint8_t num); 186 | void DecodePrimaryHeartbeat(P_HEARTBEAT_T *heartbeat); 187 | void DecodeSecondaryPresence(RESP_PACKET_T *presence); 188 | void DecodeSecondaryHeartbeat(S_HEARTBEAT_T *heartbeat); 189 | void DecodeVin(EXTENDED_RESP_PACKET_T *vin); 190 | void DecodeExtFirmwareVerison(RESP_PACKET_T *firmware_ver); 191 | void DecodeSerialNumber(EXTENDED_RESP_PACKET_T *serial); 192 | void SetCurrent(uint8_t current); 193 | void SetMaxCurrent(uint8_t maxCurrent); 194 | void SetMinCurrent(uint8_t mincurrent); 195 | void SetStopStartDelay(uint16_t stopstart_delay); 196 | uint8_t ChargersConnected(); 197 | TeslaConnector * GetConnector(uint16_t twcid); 198 | void UpdateTotalActualCurrent(); 199 | void UpdateTotalPhaseCurrent(uint8_t phase); 200 | void UpdateTotalConnectedCars(); 201 | void StopCharging(uint16_t twcid); 202 | void StartCharging(uint16_t twcid); 203 | bool IsCharging(); 204 | 205 | private: 206 | uint8_t CalculateChecksum(uint8_t *buffer, size_t length); 207 | bool VerifyChecksum(uint8_t *buffer, size_t length); 208 | void DecodeLinkReady(); 209 | void DecodePrimaryHeartbeat(); 210 | void DecodeSecondaryHeartbeat(); 211 | void ProcessPacket(uint8_t *packet, size_t length); 212 | static void startupTask_(void *pvParameter); 213 | void Debug(bool enabled); 214 | void SendDataFromString(const uint8_t* dataString, size_t length); 215 | 216 | private: 217 | uart::UARTComponent *serial_; 218 | GPIOPin *flow_control_pin_{nullptr}; 219 | TeslaControllerIO *controller_io_; 220 | uint8_t num_connected_chargers_; 221 | uint16_t twcid_; 222 | uint8_t sign_; 223 | uint8_t receive_buffer_[MAX_PACKET_LENGTH]; 224 | uint8_t receive_index_; 225 | bool message_started_ = false; 226 | uint8_t available_current_; 227 | uint8_t max_current_; 228 | uint8_t min_current_; 229 | uint16_t stopstart_delay_; 230 | bool current_changed_; 231 | bool debug_; 232 | uint8_t passive_mode_; 233 | uint8_t total_current_; 234 | TeslaConnector* chargers[3]; 235 | }; 236 | } 237 | } 238 | -------------------------------------------------------------------------------- /twc.yaml: -------------------------------------------------------------------------------- 1 | esphome: 2 | name: twc 3 | friendly_name: Tesla Wall Connector 4 | 5 | esp32: 6 | board: esp32dev 7 | 8 | wifi: 9 | ssid: !secret wifi_ssid 10 | password: !secret wifi_password 11 | 12 | logger: 13 | level: DEBUG 14 | 15 | ota: 16 | 17 | api: 18 | 19 | uart: 20 | id: twc_uart 21 | tx_pin: 5 22 | rx_pin: 19 23 | baud_rate: 9600 24 | data_bits: 8 25 | parity: NONE 26 | stop_bits: 1 27 | 28 | external_components: 29 | - source: github://jnicolson/esphome-twc-controller 30 | components: [twc-controller] 31 | 32 | twc-controller: 33 | id: twc 34 | uart_id: twc_uart 35 | min_current: 6 36 | max_current: 32 37 | set_current: 6 38 | twc_id: 0xAB32 39 | flow_control_pin: 18 40 | current: 41 | name: "Charging Current" 42 | max_allowable_current: 43 | name: "Maximum Allowable Current" 44 | total_kwh_delivered: 45 | name: "Total kWh Delivered" 46 | serial: 47 | name: "Serial" 48 | phase_1_voltage: 49 | name: "Phase 1 Voltage" 50 | phase_2_voltage: 51 | name: "Phase 2 Voltage" 52 | phase_3_voltage: 53 | name: "Phase 3 Voltage" 54 | phase_1_current: 55 | name: "Phase 1 Current" 56 | phase_2_current: 57 | name: "Phase 2 Current" 58 | phase_3_current: 59 | name: "Phase 3 Current" 60 | firmware_version: 61 | name: "Firmware Version" 62 | actual_current: 63 | name: "Actual Current" 64 | connected_vin: 65 | name: "Connected VIN" 66 | state: 67 | name: "State" 68 | --------------------------------------------------------------------------------