├── Example implementation Node-RED.png ├── LICENSE ├── README.md ├── main ├── BLE.ino ├── BMS_process_data.ino ├── EasyFunctions.ino ├── MqttFunctions.ino ├── datatypes.h └── main.ino └── programmer-config.png /Example implementation Node-RED.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/BeaverUI/ESP32-BluetoothBMS2MQTT/adcbf2d802fbd48049dd4d92c862aab2d0da0c33/Example implementation Node-RED.png -------------------------------------------------------------------------------- /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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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 | # ESP32-BluetoothBMS2MQTT 2 | 3 | *Use Releases (right side of this page) to download the latest version.* 4 | 5 | Connects to Xiaoxiang BMS (www.lithiumbatterypcb.com) via Bluetooth and sends its status to an MQTT server over WiFi. 6 | 7 | 8 | This work is based on https://github.com/kolins-cz/Smart-BMS-Bluetooth-ESP32, with several enhancements/fixes: 9 | * various bugfixes and protocol improvements (fixes for memory leaks, reboots and reconnect problems) 10 | * more advanced timeout and connection-related features, saving energy of the BMS 11 | * added MQTT functionality 12 | * removed the display routines (uses MQTT instead) 13 | 14 | ## Required stuff 15 | * ESP32 (with Bluetooth and WiFi). This code was tested on TTGO-Energy (https://github.com/LilyGO/LILYGO-T-Energy) and T-Koala (https://github.com/LilyGO/T-Koala) boards, but should work with any ESP32. 16 | * Raspberry Pi or other Linux server, running an MQTT server (e.g. mosquitto) and something to display the data (e.g. Node-RED). 17 | * In Node-RED, I recommend to use the "node-red-dashboard" library to display status on a nice web-based dashboard. 18 | 19 | Note: some ESP boards experience brownouts (resets) with this code due to the high consumption of WiFi + Bluetooth which causes power supply stability issues. This can be fixed by removing the diode that is in series with the USB connector, and adding a 220uF (or similar) electrolytic capacitor between +5V and GND, and another one between +3V3 and GND (these pins are typically available on the headers, so they are easy to add). When adding one, mind the polarity of the capacitor. 20 | 21 | ## Programming the ESP 22 | * Install the Arduino IDE 23 | * Configure the IDE (see code for more info): 24 | * In preferences, add the board manager URL 25 | * Install the required libraries 26 | * Open main.ino 27 | * Configure the programmer: 28 | * Connect the ESP32 board via USB, select the correct COM port 29 | * See programmer-config.png for the other settings 30 | 31 | ## Configuring 32 | To configure the module, change the following in main.ino: 33 | * configure your MQTT server and set the node name 34 | * configure your WiFi (SSID + password) 35 | * program the code, check the MQTT messages for the correct BMS device name and device address 36 | * configure the BLE name and address to the detected BMS name and addres 37 | 38 | ## Example output in Node-RED 39 |
40 | -------------------------------------------------------------------------------- /main/BLE.ino: -------------------------------------------------------------------------------- 1 | BLEScan* pBLEScan = nullptr; 2 | BLEClient* pClient = nullptr; 3 | BLEAdvertisedDevice* pRemoteDevice = nullptr; 4 | BLERemoteService* pRemoteService = nullptr; 5 | BLERemoteCharacteristic* pRemoteCharacteristic_rx = nullptr; 6 | BLERemoteCharacteristic* pRemoteCharacteristic_tx = nullptr; 7 | 8 | // 0000ff01-0000-1000-8000-00805f9b34fb 9 | // Notifications from this characteristic is received data from BMS 10 | // NOTIFY, READ 11 | 12 | // 0000ff02-0000-1000-8000-00805f9b34fb 13 | // Write this characteristic to send data to BMS 14 | // READ, WRITE, WRITE NO RESPONSE 15 | 16 | boolean doScan = false; // becomes true when BLE is initialized and scanning is allowed 17 | boolean doConnect = false; // becomes true when correct ID is found during scanning 18 | 19 | boolean ble_client_connected = false; // true when fully connected 20 | 21 | unsigned int ble_packets_requested = 0b00; // keeps track of requested packets 22 | unsigned int ble_packets_received = 0b00; // keeps track of received packets 23 | 24 | 25 | // ======= CALLBACKS ========= 26 | 27 | void MyEndOfScanCallback(BLEScanResults pBLEScanResult){ 28 | bms_status=false; // BMS not found 29 | 30 | if(BLE_CALLBACK_DEBUG){ 31 | MqttDebug("BLE: scan finished"); 32 | Serial.println("Scan finished."); 33 | } 34 | } 35 | 36 | class MyAdvertisedDeviceCallbacks : public BLEAdvertisedDeviceCallbacks{ 37 | // called for each advertising BLE server 38 | 39 | void onResult(BLEAdvertisedDevice advertisedDevice){ 40 | // found a device 41 | 42 | 43 | if(BLE_CALLBACK_DEBUG){ 44 | MqttDebug( 45 | String("BLE: found ") + 46 | String(advertisedDevice.getName().c_str()) + 47 | String(" with address ") + 48 | String(advertisedDevice.getAddress().toString().c_str()) + 49 | String(" and RSSI ") + 50 | String(advertisedDevice.getRSSI()) 51 | ); 52 | 53 | Serial.print("BLE: found "); 54 | Serial.println(advertisedDevice.toString().c_str()); 55 | } 56 | 57 | 58 | 59 | // Check if found device is the one we are looking for 60 | if( 61 | strcmp(advertisedDevice.getName().c_str(), BLE_NAME)==0 && 62 | strcmp(advertisedDevice.getAddress().toString().c_str(), BLE_ADDRESS)==0 && 63 | advertisedDevice.haveServiceUUID() && 64 | advertisedDevice.isAdvertisingService(serviceUUID) 65 | ){ 66 | 67 | if(BLE_CALLBACK_DEBUG){ 68 | MqttDebug("BLE: target device found"); 69 | } 70 | 71 | pBLEScan->stop(); 72 | 73 | if(advertisedDevice.getRSSI() >= BLE_MIN_RSSI){ 74 | 75 | // delete old remote device, create new one 76 | if(pRemoteDevice != nullptr){ 77 | delete pRemoteDevice; 78 | } 79 | pRemoteDevice = new BLEAdvertisedDevice(advertisedDevice); 80 | 81 | doConnect = true; 82 | }else{ 83 | if(BLE_CALLBACK_DEBUG){ 84 | MqttDebug("BLE: RSSI of target device below minimum"); 85 | } 86 | } 87 | } 88 | } 89 | }; 90 | 91 | class MyClientCallback : public BLEClientCallbacks{ 92 | // called on connect/disconnect 93 | void onConnect(BLEClient* pclient){ 94 | 95 | if(BLE_CALLBACK_DEBUG){ 96 | MqttDebug(String("BLE: connecting to ") + String(pclient->getPeerAddress().toString().c_str())); 97 | } 98 | } 99 | 100 | void onDisconnect(BLEClient* pclient){ 101 | ble_client_connected = false; 102 | doConnect = false; 103 | 104 | if(BLE_CALLBACK_DEBUG){ 105 | MqttDebug(String("BLE: disconnected from ") + String(pclient->getPeerAddress().toString().c_str())); 106 | } 107 | 108 | } 109 | }; 110 | 111 | static void MyNotifyCallback(BLERemoteCharacteristic *pBLERemoteCharacteristic, uint8_t *pData, size_t length, bool isNotify){ 112 | //this is called when BLE server sents data via notification 113 | //hexDump((char*)pData, length); 114 | if(!bleCollectPacket((char *)pData, length)){ 115 | MqttDebug("ERROR: packet could not be collected."); 116 | } 117 | } 118 | 119 | 120 | 121 | 122 | 123 | // ======= OTHERS ========= 124 | 125 | void handleBLE(){ 126 | static unsigned long prev_millis_standby = 0; 127 | 128 | prev_millis_standby = millis(); 129 | 130 | while(true){ // loop until we hit a timeout or gathered all packets 131 | 132 | if((ble_packets_received == BLE_PACKETSRECEIVED_BEFORE_STANDBY) || (millis()>prev_millis_standby+BLE_TIMEOUT)){ 133 | if(ble_packets_received == BLE_PACKETSRECEIVED_BEFORE_STANDBY){ 134 | MqttDebug("BLE: all packets received"); 135 | bms_status=true; // BMS was connected, data up-to-date 136 | 137 | }else{ 138 | MqttDebug("BLE: connection timeout"); 139 | bms_status=false; // BMS not (fully) connected 140 | } 141 | 142 | break; // we're done with BLE, exit while loop 143 | } 144 | else if (doConnect){ 145 | 146 | // found the desired BLE server, now connect to it 147 | if (connectToServer()){ 148 | ble_client_connected = true; 149 | ble_packets_received=0; 150 | ble_packets_requested=0; 151 | 152 | }else{ 153 | ble_client_connected = false; 154 | MqttDebug("BLE: failed to connect"); 155 | } 156 | 157 | doConnect = false; 158 | } 159 | 160 | if (ble_client_connected){ 161 | // if connected to BLE server, request all data 162 | if((ble_packets_requested & 0b01)!=0b01){ 163 | // request packet 0b01 164 | MqttDebug("BLE: requesting packet 0b01"); 165 | delay(50); 166 | if(bmsRequestBasicInfo()){ 167 | ble_packets_requested |= 0b01; 168 | } 169 | 170 | }else if(((ble_packets_received & 0b01)==0b01) && ((ble_packets_requested & 0b10)!=0b10)){ 171 | // request packet 0b10 after 0b01 has been received 172 | MqttDebug("BLE: requesting packet 0b10"); 173 | delay(50); 174 | if(bmsRequestCellInfo()){ 175 | ble_packets_requested |= 0b10; 176 | } 177 | } 178 | 179 | }else if ((!doConnect)&&(doScan)){ 180 | // we are not connected, so we can scan for devices 181 | MqttDebug("BLE: not connected, starting scan"); 182 | Serial.print("BLE is not connected, starting scan"); 183 | 184 | // Disconnect client 185 | if((pClient != nullptr)&&(pClient->isConnected())){ 186 | pClient->disconnect(); 187 | } 188 | 189 | // stop scan (if running) and start a new one 190 | pBLEScan->setActiveScan(true); 191 | pBLEScan->setInterval(1 << 8); // 160 ms 192 | pBLEScan->setWindow(1 << 7); // 80 ms 193 | pBLEScan->start(BLE_SCAN_DURATION, MyEndOfScanCallback, false); // non-blocking, use a callback 194 | 195 | doScan=false; 196 | 197 | MqttDebug("BLE: scan started"); 198 | } 199 | } 200 | } 201 | 202 | void bleGatherPackets(){ 203 | bleStart(); 204 | handleBLE(); 205 | blePause(); 206 | BLEDevice::deinit(false); 207 | } 208 | 209 | void bleStart(){ 210 | Serial.print("Starting BLE... "); 211 | 212 | BLEDevice::init(""); 213 | //esp_bt_controller_mem_release(ESP_BT_MODE_CLASSIC_BT); // release some unused memory 214 | 215 | // Retrieve a BLE client 216 | pClient = BLEDevice::createClient(); 217 | pClient->setClientCallbacks(new MyClientCallback()); 218 | 219 | // Retrieve a BLE scanner 220 | pBLEScan = BLEDevice::getScan(); 221 | pBLEScan->setAdvertisedDeviceCallbacks(new MyAdvertisedDeviceCallbacks()); 222 | 223 | bleContinue(); 224 | Serial.println("done"); 225 | } 226 | 227 | void blePause(){ 228 | // stop scanning and disconnect from all devices 229 | doScan=false; 230 | 231 | // Disconnect client 232 | if((pClient != nullptr)&&(pClient->isConnected())){ 233 | pClient->disconnect(); 234 | } 235 | 236 | delay(50); 237 | 238 | pBLEScan->stop(); 239 | 240 | ble_client_connected=false; 241 | doConnect=false; 242 | ble_packets_received=0; 243 | ble_packets_requested=0; 244 | 245 | } 246 | 247 | 248 | void bleContinue(){ 249 | // Prepare for scanning 250 | ble_client_connected=false; 251 | doConnect=false; 252 | ble_packets_received=0; 253 | 254 | doScan=true; // start scanning for new devices 255 | } 256 | 257 | bool connectToServer(){ 258 | if(pRemoteDevice==nullptr){ 259 | Serial.println("Invalid remote device, can't connect"); 260 | return false; 261 | } 262 | 263 | // Disconnect client 264 | if((pClient != nullptr)&&(pClient->isConnected())){ 265 | pClient->disconnect(); 266 | } 267 | 268 | Serial.print("Forming a connection to "); 269 | Serial.println(pRemoteDevice->getAddress().toString().c_str()); 270 | 271 | delay(100); 272 | 273 | // Connect to the remote BLE Server. 274 | pClient->connect(pRemoteDevice); 275 | if(!(pClient->isConnected())){ 276 | MqttDebug(String("BLE: failed to connect")); 277 | Serial.println("Failed to connect to server"); 278 | pClient->disconnect(); 279 | return false; 280 | } 281 | 282 | Serial.println(" - Connected to server"); 283 | 284 | 285 | // Get remote service 286 | pRemoteService = pClient->getService(serviceUUID); 287 | if (pRemoteService == nullptr){ 288 | MqttDebug(String("BLE: failed to find service UUID")); 289 | Serial.print("Failed to find our service UUID: "); 290 | Serial.println(serviceUUID.toString().c_str()); 291 | pClient->disconnect(); 292 | return false; 293 | } 294 | Serial.println(" - Found our service"); 295 | 296 | 297 | // Get BMS receive characteristic 298 | pRemoteCharacteristic_rx = pRemoteService->getCharacteristic(charUUID_rx); 299 | if (pRemoteCharacteristic_rx == nullptr){ 300 | MqttDebug(String("BLE: failed to find RX UUID")); 301 | Serial.print("Failed to find rx UUID: "); 302 | Serial.println(charUUID_rx.toString().c_str()); 303 | pClient->disconnect(); 304 | return false; 305 | } 306 | Serial.println(" - Found RX characteristic"); 307 | 308 | 309 | // Register callback for remote characteristic (receive channel) 310 | if (pRemoteCharacteristic_rx->canNotify()){ 311 | pRemoteCharacteristic_rx->registerForNotify(MyNotifyCallback); 312 | }else{ 313 | MqttDebug(String("BLE: failed to register notification of remote characteristic")); 314 | Serial.println("Failed to register notification of remote characteristic"); 315 | pClient->disconnect(); 316 | return false; 317 | } 318 | Serial.println(" - Registered remote characteristic for notification"); 319 | 320 | 321 | // Get BMS transmit characteristic 322 | pRemoteCharacteristic_tx = pRemoteService->getCharacteristic(charUUID_tx); 323 | if (pRemoteCharacteristic_tx == nullptr){ 324 | MqttDebug(String("BLE: failed to find TX UUID")); 325 | Serial.print("Failed to find tx UUID: "); 326 | Serial.println(charUUID_tx.toString().c_str()); 327 | pClient->disconnect(); 328 | return false; 329 | } 330 | Serial.println(" - Found TX characteristic"); 331 | 332 | 333 | // Check whether tx is writeable 334 | if (!(pRemoteCharacteristic_tx->canWriteNoResponse())){ 335 | MqttDebug(String("BLE: failed TX remote characteristic is not writable")); 336 | Serial.println("Failed TX remote characteristic is not writable"); 337 | pClient->disconnect(); 338 | return false; 339 | } 340 | Serial.println(" - TX is writable"); 341 | 342 | 343 | delay(BLE_REQUEST_DELAY); // wait, otherwise writeValue doesn't work for some reason 344 | // to do: fix this ugly hack 345 | 346 | MqttDebug(String("BLE: connected")); 347 | 348 | return true; 349 | } 350 | 351 | bool sendCommand(uint8_t *data, uint32_t dataLen){ 352 | if((pClient!=nullptr)&&(pClient->isConnected())){ 353 | pRemoteCharacteristic_tx->writeValue(data, dataLen, false); 354 | return true; 355 | }else{ 356 | return false; 357 | } 358 | } 359 | -------------------------------------------------------------------------------- /main/BMS_process_data.ino: -------------------------------------------------------------------------------- 1 | bool isPacketValid(byte *packet) //check if packet is valid 2 | { 3 | if (packet == nullptr){ 4 | return false; 5 | } 6 | 7 | bmsPacketHeaderStruct *pHeader = (bmsPacketHeaderStruct *)packet; 8 | int checksumPos = pHeader->dataLen + 2; // status + data len + data 9 | 10 | int offset = 2; // header 0xDD and command type are not in data length 11 | 12 | if (packet[0] != 0xDD){ 13 | // start bit missing 14 | return false; 15 | } 16 | 17 | if (packet[offset + checksumPos + 2] != 0x77){ 18 | // stop bit missing 19 | return false; 20 | } 21 | 22 | byte checksum = 0; 23 | for (int i = 0; i < checksumPos; i++){ 24 | checksum += packet[offset + i]; 25 | } 26 | checksum = ((checksum ^ 0xFF) + 1) & 0xFF; 27 | 28 | if (checksum != packet[offset + checksumPos + 1]){ 29 | return false; 30 | } 31 | 32 | return true; 33 | } 34 | 35 | bool processBasicInfo(packBasicInfoStruct *output, byte *data, unsigned int dataLen) 36 | { 37 | // Expected data len 38 | if (dataLen != 0x1B) 39 | { 40 | return false; 41 | } 42 | 43 | output->Volts = ((uint32_t)two_ints_into16(data[0], data[1])) * 10; // Resolution 10 mV -> convert to milivolts eg 4895 > 48950mV 44 | output->Amps = ((int32_t)two_ints_into16(data[2], data[3])) * 10; // Resolution 10 mA -> convert to miliamps 45 | 46 | output->Watts = output->Volts * output->Amps / 1000000; // W 47 | 48 | output->CapacityRemainAh = ((uint16_t)two_ints_into16(data[4], data[5])) * 10; 49 | output->CapacityRemainPercent = ((uint8_t)data[19]); 50 | 51 | output->Temp1 = (((uint16_t)two_ints_into16(data[23], data[24])) - 2731); 52 | output->Temp2 = (((uint16_t)two_ints_into16(data[25], data[26])) - 2731); 53 | output->BalanceCodeLow = (two_ints_into16(data[12], data[13])); 54 | output->BalanceCodeHigh = (two_ints_into16(data[14], data[15])); 55 | output->MosfetStatus = ((byte)data[20]); 56 | 57 | return true; 58 | } 59 | 60 | bool processCellInfo(packCellInfoStruct *output, byte *data, unsigned int dataLen) 61 | { 62 | uint16_t _cellSum; 63 | uint16_t _cellMin = 5000; 64 | uint16_t _cellMax = 0; 65 | uint16_t _cellAvg; 66 | uint16_t _cellDiff; 67 | 68 | output->NumOfCells = dataLen / 2; // data contains 2 bytes per cell 69 | 70 | //go trough individual cells 71 | for (byte i = 0; i < dataLen / 2; i++) 72 | { 73 | output->CellVolt[i] = ((uint16_t)two_ints_into16(data[i * 2], data[i * 2 + 1])); // Resolution 1 mV 74 | _cellSum += output->CellVolt[i]; 75 | if (output->CellVolt[i] > _cellMax) 76 | { 77 | _cellMax = output->CellVolt[i]; 78 | } 79 | if (output->CellVolt[i] < _cellMin) 80 | { 81 | _cellMin = output->CellVolt[i]; 82 | } 83 | } 84 | 85 | output->CellMin = _cellMin; 86 | output->CellMax = _cellMax; 87 | output->CellDiff = _cellMax - _cellMin; 88 | output->CellAvg = _cellSum / output->NumOfCells; 89 | 90 | return true; 91 | } 92 | 93 | bool bmsProcessPacket(byte *packet) 94 | { 95 | bool isValid = isPacketValid(packet); 96 | 97 | if (isValid != true) 98 | { 99 | Serial.println("Invalid packer received"); 100 | return false; 101 | } 102 | 103 | bmsPacketHeaderStruct *pHeader = (bmsPacketHeaderStruct *)packet; 104 | byte *data = packet + sizeof(bmsPacketHeaderStruct); // TODO Fix this ugly hack 105 | unsigned int dataLen = pHeader->dataLen; 106 | 107 | bool result = false; 108 | 109 | // find packet type (basic info or cell info) 110 | switch (pHeader->type) 111 | { 112 | case cBasicInfo: 113 | { 114 | // Process basic info 115 | result = processBasicInfo(&packBasicInfo, data, dataLen); 116 | if(result==true){ 117 | ble_packets_received |= 0b01; 118 | bms_last_update_time=millis(); 119 | } 120 | 121 | break; 122 | } 123 | 124 | case cCellInfo: 125 | { 126 | // Process cell info 127 | result = processCellInfo(&packCellInfo, data, dataLen); 128 | if(result==true){ 129 | ble_packets_received |= 0b10; 130 | bms_last_update_time=millis(); 131 | } 132 | break; 133 | } 134 | 135 | default: 136 | result = false; 137 | Serial.printf("Unsupported packet type detected. Type: %d", pHeader->type); 138 | } 139 | 140 | return result; 141 | } 142 | 143 | bool bleCollectPacket(char *data, uint32_t dataSize) // reconstruct packet, called by notifyCallback function 144 | { 145 | static uint8_t packetstate = 0; //0 - empty, 1 - first half of packet received, 2- second half of packet received 146 | 147 | // packet sizes: 148 | // (packet ID 03) = 4 (header) + 23 + 2*N_NTCs + 2 (checksum) + 1 (stop) 149 | // (packet ID 04) = 4 (header) + 2*NUM_CELLS + 2 (checksum) + 1 (stop) 150 | static uint8_t packetbuff[4 + 2*25 + 2 + 1] = {0x0}; // buffer size suitable for up to 25 cells 151 | 152 | static uint32_t totalDataSize = 0; 153 | bool retVal = false; 154 | //hexDump(data,dataSize); 155 | 156 | if(totalDataSize + dataSize > sizeof(packetbuff)){ 157 | Serial.printf("ERROR: datasize is overlength."); 158 | 159 | MqttDebug( 160 | String("ERROR: datasize is overlength. ") + 161 | String("allocated=") + 162 | String(sizeof(packetbuff)) + 163 | String(", size=") + 164 | String(totalDataSize + dataSize) 165 | ); 166 | 167 | totalDataSize = 0; 168 | packetstate = 0; 169 | 170 | retVal = false; 171 | } 172 | else if (data[0] == 0xdd && packetstate == 0) // probably got 1st half of packet 173 | { 174 | packetstate = 1; 175 | for (uint8_t i = 0; i < dataSize; i++) 176 | { 177 | packetbuff[i] = data[i]; 178 | } 179 | totalDataSize = dataSize; 180 | retVal = true; 181 | } 182 | else if (data[dataSize - 1] == 0x77 && packetstate == 1) //probably got 2nd half of the packet 183 | { 184 | packetstate = 2; 185 | for (uint8_t i = 0; i < dataSize; i++) 186 | { 187 | packetbuff[i + totalDataSize] = data[i]; 188 | } 189 | totalDataSize += dataSize; 190 | retVal = true; 191 | } 192 | 193 | if (packetstate == 2) //got full packet 194 | { 195 | uint8_t packet[totalDataSize]; 196 | memcpy(packet, packetbuff, totalDataSize); 197 | 198 | bmsProcessPacket(packet); //pass pointer to retrieved packet to processing function 199 | packetstate = 0; 200 | totalDataSize = 0; 201 | retVal = true; 202 | } 203 | return retVal; 204 | } 205 | 206 | bool bmsRequestBasicInfo(){ 207 | // header status command length data checksum footer 208 | // DD A5 03 00 FF FD 77 209 | uint8_t data[7] = {0xdd, 0xa5, cBasicInfo, 0x0, 0xff, 0xfd, 0x77}; 210 | return sendCommand(data, sizeof(data)); 211 | } 212 | 213 | bool bmsRequestCellInfo(){ 214 | // header status command length data checksum footer 215 | // DD A5 04 00 FF FC 77 216 | uint8_t data[7] = {0xdd, 0xa5, cCellInfo, 0x0, 0xff, 0xfc, 0x77}; 217 | return sendCommand(data, sizeof(data)); 218 | } 219 | 220 | /* 221 | void printBasicInfo() //debug all data to uart 222 | { 223 | Serial.printf("Total voltage: %f\n", (float)packBasicInfo.Volts / 1000); 224 | Serial.printf("Amps: %f\n", (float)packBasicInfo.Amps / 1000); 225 | Serial.printf("CapacityRemainAh: %f\n", (float)packBasicInfo.CapacityRemainAh / 1000); 226 | Serial.printf("CapacityRemainPercent: %d\n", packBasicInfo.CapacityRemainPercent); 227 | Serial.printf("Temp1: %f\n", (float)packBasicInfo.Temp1 / 10); 228 | Serial.printf("Temp2: %f\n", (float)packBasicInfo.Temp2 / 10); 229 | Serial.printf("Balance Code Low: 0x%x\n", packBasicInfo.BalanceCodeLow); 230 | Serial.printf("Balance Code High: 0x%x\n", packBasicInfo.BalanceCodeHigh); 231 | Serial.printf("Mosfet Status: 0x%x\n", packBasicInfo.MosfetStatus); 232 | } 233 | 234 | void printCellInfo() //debug all data to uart 235 | { 236 | Serial.printf("Number of cells: %u\n", packCellInfo.NumOfCells); 237 | for (byte i = 1; i <= packCellInfo.NumOfCells; i++) 238 | { 239 | Serial.printf("Cell no. %u", i); 240 | Serial.printf(" %f\n", (float)packCellInfo.CellVolt[i - 1] / 1000); 241 | } 242 | Serial.printf("Max cell volt: %f\n", (float)packCellInfo.CellMax / 1000); 243 | Serial.printf("Min cell volt: %f\n", (float)packCellInfo.CellMin / 1000); 244 | Serial.printf("Difference cell volt: %f\n", (float)packCellInfo.CellDiff / 1000); 245 | Serial.printf("Average cell volt: %f\n", (float)packCellInfo.CellAvg / 1000); 246 | Serial.println(); 247 | } 248 | 249 | void constructBigString() //debug all data to uart 250 | { 251 | stringBuffer[0] = '\0'; //clear old data 252 | snprintf(stringBuffer, STRINGBUFFERSIZE, "Total voltage: %f\n", (float)packBasicInfo.Volts / 1000); 253 | snprintf(stringBuffer, STRINGBUFFERSIZE, "Amps: %f\n", (float)packBasicInfo.Amps / 1000); 254 | snprintf(stringBuffer, STRINGBUFFERSIZE, "CapacityRemainAh: %f\n", (float)packBasicInfo.CapacityRemainAh / 1000); 255 | snprintf(stringBuffer, STRINGBUFFERSIZE, "CapacityRemainPercent: %d\n", packBasicInfo.CapacityRemainPercent); 256 | snprintf(stringBuffer, STRINGBUFFERSIZE, "Temp1: %f\n", (float)packBasicInfo.Temp1 / 10); 257 | snprintf(stringBuffer, STRINGBUFFERSIZE, "Temp2: %f\n", (float)packBasicInfo.Temp2 / 10); 258 | snprintf(stringBuffer, STRINGBUFFERSIZE, "Balance Code Low: 0x%x\n", packBasicInfo.BalanceCodeLow); 259 | snprintf(stringBuffer, STRINGBUFFERSIZE, "Balance Code High: 0x%x\n", packBasicInfo.BalanceCodeHigh); 260 | snprintf(stringBuffer, STRINGBUFFERSIZE, "Mosfet Status: 0x%x\n", packBasicInfo.MosfetStatus); 261 | 262 | snprintf(stringBuffer, STRINGBUFFERSIZE, "Number of cells: %u\n", packCellInfo.NumOfCells); 263 | for (byte i = 1; i <= packCellInfo.NumOfCells; i++) 264 | { 265 | snprintf(stringBuffer, STRINGBUFFERSIZE, "Cell no. %u", i); 266 | snprintf(stringBuffer, STRINGBUFFERSIZE, " %f\n", (float)packCellInfo.CellVolt[i - 1] / 1000); 267 | } 268 | snprintf(stringBuffer, STRINGBUFFERSIZE, "Max cell volt: %f\n", (float)packCellInfo.CellMax / 1000); 269 | snprintf(stringBuffer, STRINGBUFFERSIZE, "Min cell volt: %f\n", (float)packCellInfo.CellMin / 1000); 270 | snprintf(stringBuffer, STRINGBUFFERSIZE, "Difference cell volt: %f\n", (float)packCellInfo.CellDiff / 1000); 271 | snprintf(stringBuffer, STRINGBUFFERSIZE, "Average cell volt: %f\n", (float)packCellInfo.CellAvg / 1000); 272 | snprintf(stringBuffer, STRINGBUFFERSIZE, "\n"); 273 | } 274 | 275 | void hexDump(const char *data, uint32_t dataSize) //debug function 276 | { 277 | Serial.println("HEX data:"); 278 | 279 | for (int i = 0; i < dataSize; i++) 280 | { 281 | Serial.printf("0x%x, ", data[i]); 282 | } 283 | Serial.println(""); 284 | } 285 | */ 286 | 287 | int16_t two_ints_into16(int highbyte, int lowbyte) // turns two bytes into a single long integer 288 | { 289 | int16_t result = (highbyte); 290 | result <<= 8; //Left shift 8 bits, 291 | result = (result | lowbyte); //OR operation, merge the two 292 | return result; 293 | } 294 | -------------------------------------------------------------------------------- /main/EasyFunctions.ino: -------------------------------------------------------------------------------- 1 | // EasyFunctions - some handy functions that I regularly use 2 | // by Bas Vermulst 3 | 4 | bool InterruptPending(unsigned long *prev_millis, unsigned int period, int mode){ 5 | // mode = 0: approximate mode without catch-up 6 | // mode = 1: exact mode without catch-up 7 | // mode = 2: exact mode with catch-up 8 | // note: overflow is handled correctly and exactly (tested) 9 | 10 | if( (millis()-(*prev_millis) > period) || (millis()-(*prev_millis) < 0)){ 11 | // trigger detected 12 | switch(mode){ 13 | default: 14 | case 0: 15 | // approximate mode without catch-up 16 | *prev_millis=millis(); 17 | break; 18 | 19 | case 1: 20 | // exact mode without catch-up 21 | while(millis()-(*prev_millis) > period){ // unwind 22 | *prev_millis=*prev_millis+period; 23 | } 24 | break; 25 | 26 | case 2: 27 | // exact mode with catch-up 28 | *prev_millis=*prev_millis+period; 29 | break; 30 | } 31 | 32 | return true; 33 | }else{ 34 | return false; 35 | } 36 | } 37 | 38 | 39 | String IPAddressString(IPAddress address){ 40 | return String(address[0]) + "." + String(address[1]) + "." + String(address[2]) + "." + String(address[3]); 41 | } 42 | 43 | 44 | String Float2SciStr(float number, int digits){ 45 | char char_buffer[40]; 46 | sprintf(char_buffer,"%.*E", digits, number); 47 | return String(char_buffer); 48 | } 49 | -------------------------------------------------------------------------------- /main/MqttFunctions.ino: -------------------------------------------------------------------------------- 1 | 2 | // connect and subscribe 3 | int MQTTconnect(void) { 4 | // Retry until connected 5 | static unsigned long prev_millis=0; 6 | 7 | while(!mqttclient.connected()){ 8 | Serial.print("Attempting MQTT connection..."); 9 | 10 | // Attempt to connect 11 | int retVal; 12 | if(strcmp(MQTT_USERNAME, "") == 0){ 13 | retVal=mqttclient.connect(NODE_NAME); 14 | }else{ 15 | retVal=mqttclient.connect(NODE_NAME,MQTT_USERNAME,MQTT_PASSWORD); 16 | } 17 | 18 | if (retVal) { 19 | Serial.println("connected"); 20 | return retVal; 21 | } else { 22 | Serial.print("failed"); 23 | } 24 | } 25 | 26 | return true; 27 | } 28 | 29 | void MqttDebug(const char* msg){ 30 | MqttDebug(String(msg)); 31 | } 32 | 33 | void MqttDebug(String msg){ 34 | debug_log_string += msg + "(|)"; 35 | } 36 | 37 | void MqttPublishDebug(){ 38 | if(debug_log_string!=""){ 39 | // spit out all debug messages that were stored 40 | int index_start=0; 41 | int index_end=0; 42 | unsigned int k=0; 43 | 44 | while(true){ 45 | index_end=debug_log_string.indexOf(String("(|)"), index_start+1); 46 | if((index_end<1)||(k++>20)){ // max 20 messages 47 | break; 48 | } 49 | 50 | mqttclient.publish(GetTopic("debug"), debug_log_string.substring(index_start,index_end)); 51 | 52 | index_start=index_end+3; 53 | } 54 | debug_log_string=""; // clear log string 55 | } 56 | } 57 | 58 | 59 | String GetTopic(String topic){ 60 | return String(NODE_NAME) + String("/") + String(topic); 61 | } 62 | -------------------------------------------------------------------------------- /main/datatypes.h: -------------------------------------------------------------------------------- 1 | #ifndef mydatatypes_H_ 2 | #define mydatatypes_H_ 3 | 4 | typedef struct 5 | { 6 | byte start; 7 | byte type; 8 | byte status; 9 | byte dataLen; 10 | } bmsPacketHeaderStruct; 11 | 12 | typedef struct 13 | { 14 | uint16_t Volts; // unit 1mV 15 | int32_t Amps; // unit 1mA 16 | int32_t Watts; // unit 1W 17 | uint16_t CapacityRemainAh; 18 | uint8_t CapacityRemainPercent; //unit 1% 19 | uint16_t Temp1; //unit 0.1C 20 | uint16_t Temp2; //unit 0.1C 21 | uint16_t BalanceCodeLow; 22 | uint16_t BalanceCodeHigh; 23 | uint8_t MosfetStatus; 24 | 25 | } packBasicInfoStruct; 26 | 27 | typedef struct 28 | { 29 | uint8_t NumOfCells; 30 | uint16_t CellVolt[BMS_MAX_CELLS]; //cell 1 has index 0 :-/ 31 | uint16_t CellMax; 32 | uint16_t CellMin; 33 | uint16_t CellDiff; // difference between highest and lowest 34 | uint16_t CellAvg; 35 | } packCellInfoStruct; 36 | 37 | /* 38 | struct packEepromStruct 39 | { 40 | uint16_t POVP; 41 | uint16_t PUVP; 42 | uint16_t COVP; 43 | uint16_t CUVP; 44 | uint16_t POVPRelease; 45 | uint16_t PUVPRelease; 46 | uint16_t COVPRelease; 47 | uint16_t CUVPRelease; 48 | uint16_t CHGOC; 49 | uint16_t DSGOC; 50 | }; 51 | 52 | #define STRINGBUFFERSIZE 300 53 | char stringBuffer[STRINGBUFFERSIZE]; 54 | */ 55 | 56 | #endif /* mydatatypes_H_ */ 57 | -------------------------------------------------------------------------------- /main/main.ino: -------------------------------------------------------------------------------- 1 | /* 2 | * Xiaoxiang BMS to MQTT via WiFi 3 | * by Bas Vermulst - https://github.com/BeaverUI/ESP32-BluetoothBMS2MQTT 4 | * 5 | * Based on original work from https://github.com/kolins-cz/Smart-BMS-Bluetooth-ESP32/blob/master/README.md 6 | * 7 | 8 | === configuring === 9 | Using the #define parameters in the CONFIGURATION section, do the following: 10 | 1) configure WiFi via WIFI_SSID and WIFI_PASSWORD 11 | 2) configure MQTT broker via MQTTSERVER 12 | 3) set unique node name via NODE_NAME 13 | 4) ensure the BMS settings are OK. You can verify the name and address using the "BLE Scanner" app on an Android phone. 14 | 15 | 16 | === compiling === 17 | 1) Add ESP-WROVER to the board manager: 18 | - File --> Preferences, add to board manager URLs: https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json 19 | - Then, Tools --> Board --> Board manager... --> install ESP32 package v2.0.3 or later. 20 | 21 | 22 | 2) Install required libraries: 23 | - MQTT (by Joel Gaehwiler) 24 | Install via "Manage Libraries..." under Tools. 25 | 26 | 3) Configure board: 27 | Select Tools --> Board --> "ESP32 Arduino" --> "ESP WRover module" 28 | 29 | 4) Connect board via USB. 30 | 31 | 5) Configure programming options: 32 | Select appropriate programming port under Tools --> Port 33 | Select correct partitioning: 1.9MB app (with OTA) or 2MB app with 2 MB SPIFFS - otherwise it won't fit 34 | 35 | 6) Program and go! 36 | 37 | */ 38 | 39 | // ==== CONFIGURATION ==== 40 | // BMS 41 | #define BMS_MAX_CELLS 15 // defines size of data types 42 | #define BMS_POLLING_INTERVAL 10*60*1000 // data output interval (shorter = connect more often = more battery consumption from BMS) in ms 43 | 44 | // BLE 45 | #define BLE_MIN_RSSI -75 // minimum signal strength before connection is attempted 46 | #define BLE_NAME "xiaoxiang" // name of BMS 47 | #define BLE_ADDRESS "a4:c1:38:1a:0c:49" // address of BMS 48 | 49 | #define BLE_SCAN_DURATION 1 // duration of scan in seconds 50 | #define BLE_REQUEST_DELAY 500 // package request delay after connecting - make this large enough to have the connection established in ms 51 | #define BLE_TIMEOUT 10*1000 // timeout of scan + gathering packets (too short will fail collecting all packets) in ms 52 | 53 | #define BLE_CALLBACK_DEBUG true // send debug messages via MQTT & serial in callbacks (handy for finding your BMS address, name, RSSI, etc) 54 | 55 | // MQTT 56 | #define MQTTSERVER "192.168.1.11" 57 | #define MQTT_USERNAME "" // leave empty if no credentials are needed 58 | #define MQTT_PASSWORD "" 59 | #define NODE_NAME "bms2mqtt" 60 | 61 | // WiFi 62 | #define WIFI_SSID "WIFI_SSID" 63 | #define WIFI_PASSWORD "WIFI_PASSWORD" 64 | 65 | // watchdog timeout 66 | #define WATCHDOG_TIMEOUT (BLE_TIMEOUT+10*1000) // go to sleep after x seconds 67 | 68 | 69 | 70 | 71 | 72 | // ==== MAIN CODE ==== 73 | #include "datatypes.h" // for brevity the BMS stuff is in this file 74 | #include // for WiFi 75 | #include // for BLE 76 | #include // for MQTT 77 | #include // for MQTT 78 | 79 | #include // to read ESP battery voltage 80 | #include // to get reset reason 81 | 82 | 83 | // Init BMS 84 | static BLEUUID serviceUUID("0000ff00-0000-1000-8000-00805f9b34fb"); //xiaoxiang bms service 85 | static BLEUUID charUUID_rx("0000ff01-0000-1000-8000-00805f9b34fb"); //xiaoxiang bms rx id 86 | static BLEUUID charUUID_tx("0000ff02-0000-1000-8000-00805f9b34fb"); //xiaoxiang bms tx id 87 | 88 | const byte cBasicInfo = 3; //datablock 3=basic info 89 | const byte cCellInfo = 4; //datablock 4=individual cell info 90 | packBasicInfoStruct packBasicInfo; 91 | packCellInfoStruct packCellInfo; 92 | unsigned long bms_last_update_time=0; 93 | bool bms_status; 94 | #define BLE_PACKETSRECEIVED_BEFORE_STANDBY 0b11 // packets to gather before disconnecting 95 | 96 | 97 | WiFiClient wificlient_mqtt; 98 | MQTTClient mqttclient; 99 | 100 | 101 | // Other stuff 102 | float battery_voltage=0; // internal battery voltage 103 | String debug_log_string=""; 104 | hw_timer_t * wd_timer = NULL; 105 | 106 | 107 | void setup(){ 108 | // use a watchdog to set the sleep timer, this avoids issues with the crashing BLE stack 109 | // at some point we should smash this bug, but for now this workaround ensures reliable operation 110 | enableWatchdogTimer(); 111 | 112 | Serial.begin(115200); 113 | 114 | // connect BLE, gather data from BMS, then disconnect and unload BLE 115 | bleGatherPackets(); 116 | 117 | 118 | // Start networking 119 | WiFi.mode(WIFI_STA); 120 | WiFi.begin(WIFI_SSID, WIFI_PASSWORD); 121 | // optional: fixed IP address, it is recommended to assign a fixed IP via the DHCP server instead 122 | // IPAddress ip(192,168,1,31); IPAddress gateway(192,168,1,1); IPAddress subnet(255,255,0,0); WiFi.config(ip, gateway, subnet); 123 | Serial.print("Attempting to connect to WiFi..."); 124 | while (WiFi.status() != WL_CONNECTED) {Serial.print("."); delay(1000);} Serial.println(""); 125 | Serial.println("Connected"); 126 | Serial.println("IP address: " + IPAddressString(WiFi.localIP())); 127 | 128 | 129 | getEspBatteryVoltage(); 130 | 131 | 132 | // Start MQTT 133 | mqttclient.begin(MQTTSERVER, wificlient_mqtt); 134 | mqttclient.onMessage(handleMQTTreceive); 135 | MQTTconnect(); 136 | handleMQTT(); 137 | 138 | MqttDebug("All done, disconnecting."); 139 | 140 | Serial.println("All done, disconnecting."); 141 | 142 | // reset error handling 143 | bool unexpected_error=false; 144 | if((GetResetReason(0) == String("SW_RESET")) || (GetResetReason(0) == String("SW_CPU_RESET"))) { 145 | MqttDebug("ERROR: Software-reset of CPU! Something messed up."); 146 | } 147 | 148 | MqttPublishDebug(); 149 | 150 | delay(1000); // give it 1 second to flush everything 151 | 152 | mqttclient.disconnect(); 153 | WiFi.disconnect(); 154 | Serial.flush(); 155 | 156 | // done, now we wait for the wdt timer interrupt that puts us in deep sleep 157 | } 158 | 159 | 160 | // === Main stuff ==== 161 | void loop(){ 162 | 163 | } 164 | 165 | 166 | // enable watchdog timer -- a very ugly hack to overcome crashes of the BLE stack 167 | // (desperate times ask for desperate measures) 168 | void enableWatchdogTimer(){ 169 | wd_timer = timerBegin(0, 80, true); 170 | timerAttachInterrupt(wd_timer, &WatchDogTimeoutHandler, true); 171 | timerAlarmWrite(wd_timer, WATCHDOG_TIMEOUT*1e3, false); 172 | timerAlarmEnable(wd_timer); 173 | } 174 | 175 | 176 | // WDT handler to put ESP in deep sleep after data has been obtained 177 | void ARDUINO_ISR_ATTR WatchDogTimeoutHandler() 178 | { 179 | esp_sleep_enable_timer_wakeup((BMS_POLLING_INTERVAL - WATCHDOG_TIMEOUT) * 1e3); // standby period is in ms, function accepts us 180 | esp_deep_sleep_start(); // sweet dreams 181 | } 182 | 183 | 184 | // read voltage of onboard battery 185 | void getEspBatteryVoltage(void){ 186 | adc1_config_width(ADC_WIDTH_BIT_12); 187 | adc1_config_channel_atten(ADC1_CHANNEL_7,ADC_ATTEN_DB_11); 188 | 189 | battery_voltage = ((float) 2*adc1_get_raw(ADC1_CHANNEL_7)*(3.3*1.06/4095)); 190 | } 191 | 192 | 193 | // ===== Handles for MQTT ===== 194 | // handle connection and send messages at intervals 195 | void handleMQTT(void){ 196 | if(WiFi.status() != WL_CONNECTED){ 197 | Serial.println("WiFi disconnected. Reconnecting."); 198 | } 199 | while(WiFi.status() != WL_CONNECTED) { 200 | Serial.print("."); 201 | delay(1000); 202 | } 203 | 204 | if (!mqttclient.connected()){ 205 | MQTTconnect(); 206 | } 207 | 208 | // Send MQTT message 209 | Serial.println("Sending MQTT update"); 210 | 211 | mqttclient.publish(GetTopic("ip"), IPAddressString(WiFi.localIP())); 212 | mqttclient.publish(GetTopic("free-heap"), String(ESP.getFreeHeap())); 213 | mqttclient.publish(GetTopic("maxalloc-heap"), String(xPortGetMinimumEverFreeHeapSize())); 214 | mqttclient.publish(GetTopic("ssid"), WiFi.SSID()); 215 | mqttclient.publish(GetTopic("rssi"), String(WiFi.RSSI())); 216 | 217 | mqttclient.publish(GetTopic("reset-reason"), String(GetResetReason(0)) + String(" | ") + String(GetResetReason(1))); 218 | 219 | mqttclient.publish(GetTopic("runtime"), String(millis()/1000)); 220 | mqttclient.publish(GetTopic("battery-voltage"), String(battery_voltage,2)); 221 | 222 | mqttclient.publish(GetTopic("bms-status"), String(bms_status)); 223 | mqttclient.publish(GetTopic("bms-status-age"), String( (millis()-bms_last_update_time)/1000 )); 224 | 225 | if(bms_status){ 226 | mqttclient.publish(GetTopic("number-of-cells"), String(packCellInfo.NumOfCells)); 227 | mqttclient.publish(GetTopic("current"), String((float)packBasicInfo.Amps / 1000,2)); 228 | mqttclient.publish(GetTopic("voltage"), String((float)packBasicInfo.Volts / 1000,2)); 229 | if(packCellInfo.NumOfCells != 0){ 230 | mqttclient.publish(GetTopic("cell-voltage"), String((float)packBasicInfo.Volts /(1000*packCellInfo.NumOfCells), 2)); 231 | } 232 | mqttclient.publish(GetTopic("cell-diff"), String((float)packCellInfo.CellDiff, 0)); 233 | mqttclient.publish(GetTopic("soc"), String((float)packBasicInfo.CapacityRemainPercent,1)); 234 | 235 | mqttclient.publish(GetTopic("temperature-1"), String((float)packBasicInfo.Temp1 / 10,1)); 236 | mqttclient.publish(GetTopic("temperature-2"), String((float)packBasicInfo.Temp2 / 10,1)); 237 | } 238 | 239 | MqttPublishDebug(); 240 | 241 | mqttclient.loop(); 242 | } 243 | 244 | 245 | // handler for incoming messages 246 | void handleMQTTreceive(String &topic, String &payload) { 247 | } 248 | 249 | 250 | // ===== Helper functions ===== 251 | String GetResetReason(int core) 252 | { 253 | RESET_REASON reason=rtc_get_reset_reason(core); 254 | switch (reason) 255 | { 256 | case 1 : return String("POWERON_RESET");break; /**<1, Vbat power on reset*/ 257 | case 3 : return String("SW_RESET");break; /**<3, Software reset digital core*/ 258 | case 4 : return String("OWDT_RESET");break; /**<4, Legacy watch dog reset digital core*/ 259 | case 5 : return String("DEEPSLEEP_RESET");break; /**<5, Deep Sleep reset digital core*/ 260 | case 6 : return String("SDIO_RESET");break; /**<6, Reset by SLC module, reset digital core*/ 261 | case 7 : return String("TG0WDT_SYS_RESET");break; /**<7, Timer Group0 Watch dog reset digital core*/ 262 | case 8 : return String("TG1WDT_SYS_RESET");break; /**<8, Timer Group1 Watch dog reset digital core*/ 263 | case 9 : return String("RTCWDT_SYS_RESET");break; /**<9, RTC Watch dog Reset digital core*/ 264 | case 10 : return String("INTRUSION_RESET");break; /**<10, Instrusion tested to reset CPU*/ 265 | case 11 : return String("TGWDT_CPU_RESET");break; /**<11, Time Group reset CPU*/ 266 | case 12 : return String("SW_CPU_RESET");break; /**<12, Software reset CPU*/ 267 | case 13 : return String("RTCWDT_CPU_RESET");break; /**<13, RTC Watch dog Reset CPU*/ 268 | case 14 : return String("EXT_CPU_RESET");break; /**<14, for APP CPU, reseted by PRO CPU*/ 269 | case 15 : return String("RTCWDT_BROWN_OUT_RESET");break;/**<15, Reset when the vdd voltage is not stable*/ 270 | case 16 : return String("RTCWDT_RTC_RESET");break; /**<16, RTC Watch dog reset digital core and rtc module*/ 271 | default : return String("NO_MEAN"); 272 | } 273 | } 274 | -------------------------------------------------------------------------------- /programmer-config.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/BeaverUI/ESP32-BluetoothBMS2MQTT/adcbf2d802fbd48049dd4d92c862aab2d0da0c33/programmer-config.png --------------------------------------------------------------------------------