├── .gitignore ├── LICENSE ├── Lora-TTNMapper-T-Beam.ino ├── README.md ├── device_config.h ├── gps.cpp └── gps.h /.gitignore: -------------------------------------------------------------------------------- 1 | # Prerequisites 2 | *.d 3 | 4 | # Object files 5 | *.o 6 | *.ko 7 | *.obj 8 | *.elf 9 | 10 | # Linker output 11 | *.ilk 12 | *.map 13 | *.exp 14 | 15 | # Precompiled Headers 16 | *.gch 17 | *.pch 18 | 19 | # Libraries 20 | *.lib 21 | *.a 22 | *.la 23 | *.lo 24 | 25 | # Shared objects (inc. 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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 | -------------------------------------------------------------------------------- /Lora-TTNMapper-T-Beam.ino: -------------------------------------------------------------------------------- 1 | // If you are in USA on a 915Mhz network instead of an european / 868 Mhz one, 2 | // you MUST modify the arduino lmic library "config.h" to enable CFG_us915 instead of CFG_eu868. 3 | // That "config.h" should be in the same folder as the "lmic.h" file in your arduino folders. 4 | #include 5 | #include 6 | 7 | // UPDATE our "device_config.h" file in the same folder WITH YOUR TTN KEYS AND ADDR. 8 | #include "device_config.h" 9 | #include "gps.h" 10 | 11 | #include 12 | #include 13 | 14 | // T-Beam specific hardware 15 | #undef BUILTIN_LED 16 | #define BUILTIN_LED 21 17 | 18 | char s[32]; // used to sprintf for Serial output 19 | uint8_t txBuffer[9]; 20 | gps gps; 21 | static osjob_t sendjob; 22 | 23 | // Those variables keep their values after software restart or wakeup from sleep, not after power loss or hard reset ! 24 | RTC_NOINIT_ATTR int RTCseqnoUp, RTCseqnoDn; 25 | #ifdef USE_OTAA 26 | RTC_NOINIT_ATTR u4_t otaaDevAddr; 27 | RTC_NOINIT_ATTR u1_t otaaNetwKey[16]; 28 | RTC_NOINIT_ATTR u1_t otaaApRtKey[16]; 29 | #endif 30 | 31 | // Schedule TX every this many seconds (might become longer due to duty cycle limitations). 32 | const unsigned TX_INTERVAL = 120; 33 | 34 | // Pin mapping for TBeams, might not suit the latest version > 1.0 ? 35 | const lmic_pinmap lmic_pins = { 36 | .nss = 18, 37 | .rxtx = LMIC_UNUSED_PIN, 38 | .rst = LMIC_UNUSED_PIN, // was "14," 39 | .dio = {26, 33, 32}, 40 | }; 41 | 42 | // These callbacks are only used in over-the-air activation. 43 | #ifdef USE_OTAA 44 | void os_getDevEui (u1_t* buf) { memcpy_P(buf, DEVEUI, 8);} 45 | void os_getArtEui (u1_t* buf) { memcpy_P(buf, APPEUI, 8);} 46 | void os_getDevKey (u1_t* buf) { memcpy_P(buf, APPKEY, 16);} 47 | #else 48 | void os_getArtEui (u1_t* buf) { } 49 | void os_getDevEui (u1_t* buf) { } 50 | void os_getDevKey (u1_t* buf) { } 51 | #endif 52 | 53 | void storeFrameCounters() 54 | { 55 | RTCseqnoUp = LMIC.seqnoUp; 56 | RTCseqnoDn = LMIC.seqnoDn; 57 | sprintf(s, "Counters stored as %d/%d", LMIC.seqnoUp, LMIC.seqnoDn); 58 | Serial.println(s); 59 | } 60 | 61 | void restoreFrameCounters() 62 | { 63 | LMIC.seqnoUp = RTCseqnoUp; 64 | LMIC.seqnoDn = RTCseqnoDn; 65 | sprintf(s, "Restored counters as %d/%d", LMIC.seqnoUp, LMIC.seqnoDn); 66 | Serial.println(s); 67 | } 68 | 69 | void setOrRestorePersistentCounters() 70 | { 71 | esp_reset_reason_t reason = esp_reset_reason(); 72 | if ((reason != ESP_RST_DEEPSLEEP) && (reason != ESP_RST_SW)) 73 | { 74 | Serial.println(F("Counters both set to 0")); 75 | LMIC.seqnoUp = 0; 76 | LMIC.seqnoDn = 0; 77 | } 78 | else 79 | { 80 | restoreFrameCounters(); 81 | } 82 | } 83 | 84 | void onEvent (ev_t ev) { 85 | switch (ev) { 86 | case EV_SCAN_TIMEOUT: 87 | Serial.println(F("EV_SCAN_TIMEOUT")); 88 | break; 89 | case EV_BEACON_FOUND: 90 | Serial.println(F("EV_BEACON_FOUND")); 91 | break; 92 | case EV_BEACON_MISSED: 93 | Serial.println(F("EV_BEACON_MISSED")); 94 | break; 95 | case EV_BEACON_TRACKED: 96 | Serial.println(F("EV_BEACON_TRACKED")); 97 | break; 98 | case EV_JOINING: 99 | Serial.println(F("EV_JOINING")); 100 | break; 101 | case EV_JOINED: 102 | Serial.println(F("EV_JOINED")); 103 | #ifdef USE_OTAA 104 | otaaDevAddr = LMIC.devaddr; 105 | memcpy_P(otaaNetwKey, LMIC.nwkKey, 16); 106 | memcpy_P(otaaApRtKey, LMIC.artKey, 16); 107 | sprintf(s, "got devaddr = 0x%X", LMIC.devaddr); 108 | Serial.println(s); 109 | #endif 110 | // Disable link check validation (automatically enabled 111 | // during join, but not supported by TTN at this time). 112 | LMIC_setLinkCheckMode(0); 113 | // TTN uses SF9 for its RX2 window. 114 | LMIC.dn2Dr = DR_SF9; 115 | break; 116 | case EV_RFU1: 117 | Serial.println(F("EV_RFU1")); 118 | break; 119 | case EV_JOIN_FAILED: 120 | Serial.println(F("EV_JOIN_FAILED")); 121 | break; 122 | case EV_REJOIN_FAILED: 123 | Serial.println(F("EV_REJOIN_FAILED")); 124 | break; 125 | case EV_TXCOMPLETE: 126 | Serial.println(F("EV_TXCOMPLETE (includes waiting for RX windows)")); 127 | digitalWrite(BUILTIN_LED, LOW); 128 | if (LMIC.txrxFlags & TXRX_ACK) { 129 | Serial.println(F("Received Ack")); 130 | } 131 | if (LMIC.dataLen) { 132 | sprintf(s, "Received %i bytes of payload", LMIC.dataLen); 133 | Serial.println(s); 134 | sprintf(s, "RSSI %d SNR %.1d", LMIC.rssi, LMIC.snr); 135 | Serial.println(s); 136 | } 137 | storeFrameCounters(); 138 | // Schedule next transmission 139 | Serial.println("Good night..."); 140 | esp_sleep_enable_timer_wakeup(TX_INTERVAL*1000000); 141 | esp_deep_sleep_start(); 142 | do_send(&sendjob); 143 | break; 144 | case EV_LOST_TSYNC: 145 | Serial.println(F("EV_LOST_TSYNC")); 146 | break; 147 | case EV_RESET: 148 | Serial.println(F("EV_RESET")); 149 | break; 150 | case EV_RXCOMPLETE: 151 | // data received in ping slot 152 | Serial.println(F("EV_RXCOMPLETE")); 153 | break; 154 | case EV_LINK_DEAD: 155 | Serial.println(F("EV_LINK_DEAD")); 156 | break; 157 | case EV_LINK_ALIVE: 158 | Serial.println(F("EV_LINK_ALIVE")); 159 | break; 160 | default: 161 | Serial.println(F("Unknown event")); 162 | break; 163 | } 164 | } 165 | 166 | void do_send(osjob_t* j) { 167 | 168 | // Check if there is not a current TX/RX job running 169 | if (LMIC.opmode & OP_TXRXPEND) 170 | { 171 | Serial.println(F("OP_TXRXPEND, not sending")); 172 | } 173 | else 174 | { 175 | if (gps.checkGpsFix()) 176 | { 177 | // Prepare upstream data transmission at the next possible time. 178 | gps.buildPacket(txBuffer); 179 | LMIC_setTxData2(1, txBuffer, sizeof(txBuffer), 0); 180 | Serial.println(F("Packet queued")); 181 | digitalWrite(BUILTIN_LED, HIGH); 182 | } 183 | else 184 | { 185 | //try again in 3 seconds 186 | os_setTimedCallback(&sendjob, os_getTime() + sec2osticks(3), do_send); 187 | } 188 | } 189 | // Next TX is scheduled after TX_COMPLETE event. 190 | } 191 | 192 | void setup() { 193 | Serial.begin(115200); 194 | Serial.println(F("TTN Mapper")); 195 | 196 | //Turn off WiFi and Bluetooth 197 | WiFi.mode(WIFI_OFF); 198 | btStop(); 199 | gps.init(); 200 | 201 | // LMIC init 202 | os_init(); 203 | // Reset the MAC state. Session and pending data transfers will be discarded. 204 | LMIC_reset(); 205 | 206 | 207 | #ifdef USE_OTAA 208 | esp_reset_reason_t reason = esp_reset_reason(); 209 | if ((reason == ESP_RST_DEEPSLEEP) || (reason == ESP_RST_SW)) 210 | { 211 | LMIC_setSession(0x1, otaaDevAddr, otaaNetwKey, otaaApRtKey); 212 | } 213 | #else // ABP 214 | LMIC_setSession (0x1, DEVADDR, NWKSKEY, APPSKEY); 215 | 216 | // TTN uses SF9 for its RX2 window. 217 | LMIC.dn2Dr = DR_SF9; 218 | 219 | // Disable link check validation 220 | LMIC_setLinkCheckMode(0); 221 | #endif 222 | 223 | // This must be done AFTER calling LMIC_setSession ! 224 | setOrRestorePersistentCounters(); 225 | 226 | #ifdef CFG_eu868 227 | LMIC_setupChannel(0, 868100000, DR_RANGE_MAP(DR_SF12, DR_SF7), BAND_CENTI); // g-band 228 | LMIC_setupChannel(1, 868300000, DR_RANGE_MAP(DR_SF12, DR_SF7B), BAND_CENTI); // g-band 229 | LMIC_setupChannel(2, 868500000, DR_RANGE_MAP(DR_SF12, DR_SF7), BAND_CENTI); // g-band 230 | LMIC_setupChannel(3, 867100000, DR_RANGE_MAP(DR_SF12, DR_SF7), BAND_CENTI); // g-band 231 | LMIC_setupChannel(4, 867300000, DR_RANGE_MAP(DR_SF12, DR_SF7), BAND_CENTI); // g-band 232 | LMIC_setupChannel(5, 867500000, DR_RANGE_MAP(DR_SF12, DR_SF7), BAND_CENTI); // g-band 233 | LMIC_setupChannel(6, 867700000, DR_RANGE_MAP(DR_SF12, DR_SF7), BAND_CENTI); // g-band 234 | LMIC_setupChannel(7, 867900000, DR_RANGE_MAP(DR_SF12, DR_SF7), BAND_CENTI); // g-band 235 | LMIC_setupChannel(8, 868800000, DR_RANGE_MAP(DR_FSK, DR_FSK), BAND_MILLI); // g2-band 236 | #endif 237 | 238 | #ifdef CFG_us915 239 | LMIC_selectSubBand(1); 240 | 241 | //Disable FSB2-8, channels 16-72 242 | for (int i = 16; i < 73; i++) { 243 | if (i != 10) 244 | LMIC_disableChannel(i); 245 | } 246 | #endif 247 | 248 | // Set data rate and transmit power for uplink (note: txpow seems to be ignored by the library) 249 | LMIC_setDrTxpow(DR_SF7,14); 250 | 251 | do_send(&sendjob); 252 | pinMode(BUILTIN_LED, OUTPUT); 253 | digitalWrite(BUILTIN_LED, LOW); 254 | 255 | } 256 | 257 | void loop() { 258 | os_runloop_once(); 259 | } 260 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | ## Intro 2 | 3 | This is a simple sketch demonstrating the capability of the [TTGO T-Beam](https://www.aliexpress.com/store/product/TTGO-T-Beam-ESP32-433-868-915Mhz-WiFi-wireless-Bluetooth-Module-ESP-32-GPS-NEO-6M/2090076_32875743018.html) as a [TTN Mapper](https://ttnmapper.org/) Node on [The Things Network](https://www.thethingsnetwork.org/) LoraWAN. 4 | 5 | Derived from [sbiermann/Lora-TTNMapper-ESP32](https://github.com/sbiermann/Lora-TTNMapper-ESP32) and with some information/inspiration from [cyberman54/ESP32-Paxcounter](https://github.com/cyberman54/ESP32-Paxcounter) and [Edzelf/LoRa](https://github.com/Edzelf/LoRa). 6 | 7 | ## Software dependencies 8 | 9 | Arduino IDE [ESP32 extension](https://github.com/espressif/arduino-esp32) 10 | 11 | [TinyGPS++](http://arduiniana.org/libraries/tinygpsplus/) 12 | 13 | [LMIC-Arduino](https://github.com/matthijskooijman/arduino-lmic) : Make sure to get the last version - *1.5.0+arduino-2* currently - because the arduino IDE library updater is getting confused by the versioning scheme of that library. 14 | If you are on a 915 Mhz - ie USA - network you must modify the lmic library "config.h" file accordingly ! 15 | 16 | ## Instructions 17 | 18 | *Only on the oldest versions of the board* you need to connect the [T-Beam](https://github.com/LilyGO/TTGO-T-Beam) DIO1 pin marked *Lora1* to the *pin 33* - So that the ESP32 can read that output from the Lora module. 19 | Optionally you can also connect the *Lora2* output to *GPIO 32*, but this is not needed here. 20 | 21 | You can program the T-Beam using the [Arduino ESP32](https://github.com/espressif/arduino-esp32) board 'T-Beam'. 22 | 23 | On The Things Network side, the settings needed are available [here](https://www.thethingsnetwork.org/docs/applications/ttnmapper/). 24 | 25 | Configure the Payload decoder for TTNv2 with: 26 | ```javascript 27 | function Decoder(bytes, port) { 28 | var decoded = {}; 29 | 30 | decoded.latitude = ((bytes[0]<<16)>>>0) + ((bytes[1]<<8)>>>0) + bytes[2]; 31 | decoded.latitude = (decoded.latitude / 16777215.0 * 180) - 90; 32 | 33 | decoded.longitude = ((bytes[3]<<16)>>>0) + ((bytes[4]<<8)>>>0) + bytes[5]; 34 | decoded.longitude = (decoded.longitude / 16777215.0 * 360) - 180; 35 | 36 | var altValue = ((bytes[6]<<8)>>>0) + bytes[7]; 37 | var sign = bytes[6] & (1 << 7); 38 | if(sign) 39 | { 40 | decoded.altitude = 0xFFFF0000 | altValue; 41 | } 42 | else 43 | { 44 | decoded.altitude = altValue; 45 | } 46 | 47 | decoded.hdop = bytes[8] / 10.0; 48 | 49 | return decoded; 50 | } 51 | ``` 52 | 53 | For TTNv3 you can use the following function: 54 | ```javascript 55 | function decodeUplink(input) { 56 | var decoded = {}; 57 | 58 | decoded.latitude = ((input.bytes[0]<<16)>>>0) + ((input.bytes[1]<<8)>>>0) + input.bytes[2]; 59 | decoded.latitude = (decoded.latitude / 16777215.0 * 180) - 90; 60 | 61 | decoded.longitude = ((input.bytes[3]<<16)>>>0) + ((input.bytes[4]<<8)>>>0) + input.bytes[5]; 62 | decoded.longitude = (decoded.longitude / 16777215.0 * 360) - 180; 63 | 64 | var altValue = ((input.bytes[6]<<8)>>>0) + input.bytes[7]; 65 | var sign = input.bytes[6] & (1 << 7); 66 | if(sign) 67 | { 68 | decoded.altitude = 0xFFFF0000 | altValue; 69 | } 70 | else 71 | { 72 | decoded.altitude = altValue; 73 | } 74 | 75 | decoded.hdop = input.bytes[8] / 10.0; 76 | 77 | return { 78 | data: decoded 79 | } 80 | } 81 | ``` 82 | 83 | Let me know if more detailed instructions are needed. 84 | 85 | ## Todolist 86 | 87 | * Switch to [the maintained version](https://github.com/mcci-catena/arduino-lmic) of the arduino-lmic library. 88 | * Manage and document the different T-Beam revisions/versions. 89 | * Save and reload the frame counter somewhere - GPS RTC data ? SPIFFS ? EEPROM ? - so I can check the "Frame Counter Checks" box as recommended on TTN. <== counter is stored in slow RTC memory so it's kept after deep sleep, thanks to [@christianwicke](https://github.com/christianwicke) - Still investigating the GPS module Battery Backed RAM for saving after power off. 90 | * Also save the GPS 'status' so that on next boot it gets a fix faster. 91 | * Adapt the data send frequency based on current velocity : When not moving, an update per hour should be enough. 92 | 93 | Let me know if you think anything else would make sense for a TTN mapper node : Open an issue, I will consider it. 94 | 95 | -------------------------------------------------------------------------------- /device_config.h: -------------------------------------------------------------------------------- 1 | #pragma once 2 | 3 | 4 | // uncomment to use OTAA instead of ABP 5 | //#define USE_OTAA 1 6 | 7 | 8 | // UPDATE WITH YOUR DEVICE TTN SECRETS 9 | #ifdef USE_OTAA 10 | static PROGMEM u1_t DEVEUI[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; // Device EUI, hex, lsb 11 | static PROGMEM u1_t APPEUI[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; // Application EUI, hex, lsb 12 | static PROGMEM u1_t APPKEY[16] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; // App Key, hex, msb 13 | #else 14 | static PROGMEM u1_t NWKSKEY[16] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; // LoRaWAN NwkSKey, network session key, hex, msb 15 | static PROGMEM u1_t APPSKEY[16] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; // LoRaWAN AppSKey, application session key, hex, msb 16 | static PROGMEM u4_t DEVADDR = 0x00000000 ; // LoRaWAN end-device address (DevAddr), hex, msb 17 | #endif 18 | -------------------------------------------------------------------------------- /gps.cpp: -------------------------------------------------------------------------------- 1 | #include "gps.h" 2 | 3 | HardwareSerial GPSSerial(1); 4 | 5 | void gps::init() 6 | { 7 | GPSSerial.begin(9600, SERIAL_8N1, GPS_TX, GPS_RX); 8 | GPSSerial.setTimeout(2); 9 | } 10 | 11 | void gps::encode() 12 | { 13 | int data; 14 | int previousMillis = millis(); 15 | 16 | while((previousMillis + 1000) > millis()) 17 | { 18 | while (GPSSerial.available() ) 19 | { 20 | char data = GPSSerial.read(); 21 | tGps.encode(data); 22 | //Serial.print(data); 23 | } 24 | } 25 | //Serial.println(""); 26 | } 27 | 28 | void gps::buildPacket(uint8_t txBuffer[9]) 29 | { 30 | LatitudeBinary = ((tGps.location.lat() + 90) / 180.0) * 16777215; 31 | LongitudeBinary = ((tGps.location.lng() + 180) / 360.0) * 16777215; 32 | 33 | sprintf(t, "Lat: %f", tGps.location.lat()); 34 | Serial.println(t); 35 | 36 | sprintf(t, "Lng: %f", tGps.location.lng()); 37 | Serial.println(t); 38 | 39 | txBuffer[0] = ( LatitudeBinary >> 16 ) & 0xFF; 40 | txBuffer[1] = ( LatitudeBinary >> 8 ) & 0xFF; 41 | txBuffer[2] = LatitudeBinary & 0xFF; 42 | 43 | txBuffer[3] = ( LongitudeBinary >> 16 ) & 0xFF; 44 | txBuffer[4] = ( LongitudeBinary >> 8 ) & 0xFF; 45 | txBuffer[5] = LongitudeBinary & 0xFF; 46 | 47 | altitudeGps = tGps.altitude.meters(); 48 | txBuffer[6] = ( altitudeGps >> 8 ) & 0xFF; 49 | txBuffer[7] = altitudeGps & 0xFF; 50 | 51 | hdopGps = tGps.hdop.value()/10; 52 | txBuffer[8] = hdopGps & 0xFF; 53 | } 54 | 55 | bool gps::checkGpsFix() 56 | { 57 | encode(); 58 | if (tGps.location.isValid() && 59 | tGps.location.age() < 2000 && 60 | tGps.hdop.isValid() && 61 | tGps.hdop.value() <= 300 && 62 | tGps.hdop.age() < 2000 && 63 | tGps.altitude.isValid() && 64 | tGps.altitude.age() < 2000 ) 65 | { 66 | Serial.println("Valid gps Fix."); 67 | return true; 68 | } 69 | else 70 | { 71 | Serial.println("No gps Fix."); 72 | // sprintf(t, "location valid: %i" , tGps.location.isValid()); 73 | // Serial.println(t); 74 | // sprintf(t, "location age: %i" , tGps.location.age()); 75 | // Serial.println(t); 76 | // sprintf(t, "hdop valid: %i" , tGps.hdop.isValid()); 77 | // Serial.println(t); 78 | // sprintf(t, "hdop age: %i" , tGps.hdop.age()); 79 | // Serial.println(t); 80 | // sprintf(t, "hdop: %i" , tGps.hdop.value()); 81 | // Serial.println(t); 82 | // sprintf(t, "altitude valid: %i" , tGps.altitude.isValid()); 83 | // Serial.println(t); 84 | // sprintf(t, "altitude age: %i" , tGps.altitude.age()); 85 | // Serial.println(t); 86 | 87 | return false; 88 | } 89 | } -------------------------------------------------------------------------------- /gps.h: -------------------------------------------------------------------------------- 1 | #pragma once 2 | 3 | 4 | #include 5 | #include 6 | 7 | 8 | #define GPS_TX 12 9 | #define GPS_RX 15 10 | 11 | 12 | class gps 13 | { 14 | public: 15 | void init(); 16 | bool checkGpsFix(); 17 | void buildPacket(uint8_t txBuffer[9]); 18 | void encode(); 19 | 20 | private: 21 | uint32_t LatitudeBinary, LongitudeBinary; 22 | uint16_t altitudeGps; 23 | uint8_t hdopGps; 24 | char t[32]; // used to sprintf for Serial output 25 | TinyGPSPlus tGps; 26 | }; 27 | 28 | 29 | --------------------------------------------------------------------------------