218 lines
6.3 KiB
C++
218 lines
6.3 KiB
C++
/*
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LORA (1 Watt Module) APRS Tracker
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https://github.com/richonguzman/LoRa_1W_APRS_Tracker
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written by Ricardo Guzman ( CD2RXU-7 )
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based on lots of other Lora APRS Tracker ideas like:
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https://github.com/lora-aprs/LoRa_APRS_Tracker
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https://github.com/aprs434/lora.tracker
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https://github.com/Mane76/lora.tracker
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https://github.com/sh123/esp32_loraprs
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*/
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#include <SPI.h>
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#include <TinyGPS++.h>
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#include <RadioLib.h>
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#include <WiFi.h>
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#include <OneButton.h>
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#include "user_config.h"
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#include "pins.h"
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#include "lora_config.h"
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#include "beacon_config.h"
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#define VERSION "2023.01.24" // BETA!!!
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SX1268 radio = new Module(NSS, DIO1, NRST, BUSY);
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HardwareSerial neo6m_gps(1);
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TinyGPSPlus gps;
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OneButton UserButton1 = OneButton(BUTTON1_PIN, true, true);
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static bool send_update = true;
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void setup_lora_module() {
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int state = radio.begin(LoraFreqTx, LoraBandWidth, LoraSpreadingFactor, LoraCodingRate, LoraSyncWord, LoraOutro, LoraPreampbleLenght);
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radio.setOutputPower(Lora_Power);
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radio.setRfSwitchPins(RXEN, TXEN);
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if (state == RADIOLIB_ERR_NONE) {
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Serial.println(F("LORA (1 Watt) MODULE Ready (Radiolib success!)"));
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} else {
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Serial.println(F("Lora Module Setup failed, code "));
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Serial.println(state);
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}
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}
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void setup_gps_module() {
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neo6m_gps.begin(9600, SERIAL_8N1, GPS_TXD, GPS_RXD);
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}
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static void ForcedBeaconTx() {
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Serial.println("Forced Beacon Tx");
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send_update = true;
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}
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void setup() {
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Serial.begin(115200);
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Serial.println(F("LoRa tracker " __DATE__ " " __TIME__ " / Callsign ------> " SRC_CALLSIGN));
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pinMode(LED_BUILTIN, OUTPUT);
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digitalWrite(LED_BUILTIN, LOW);
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setup_lora_module();
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setup_gps_module();
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UserButton1.attachClick(ForcedBeaconTx);
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WiFi.mode(WIFI_OFF);
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btStop();
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Serial.print("Version = ");
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Serial.println(VERSION);
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Serial.println("Transmission Start ---->");
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}
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uint8_t tx_buffer[256];
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uint32_t lastTxTime = 0;
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char *ax25_base91enc(char *s, uint8_t n, uint32_t v) {
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/* Creates a Base-91 representation of the value in v in the string */
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/* pointed to by s, n-characters long. String length should be n+1. */
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for(s += n, *s = '\0'; n; n--) {
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*(--s) = v % 91 + 33;
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v /= 91;
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}
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return(s);
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}
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void loop() {
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UserButton1.tick();
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while (neo6m_gps.available() > 0) {
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gps.encode(neo6m_gps.read());
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}
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bool gps_loc_update = gps.location.isUpdated();
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bool gps_time_update = gps.time.isUpdated();
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//static time_t nextBeaconTimeStamp = -1;
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static double currentHeading = 0;
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static double previousHeading = 0;
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//static unsigned int rate_limit_message_text = 0;
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static double lastTxLatitude = 0.0;
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static double lastTxLongitude = 0.0;
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static double lastTxDistance = 0.0;
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static uint32_t txInterval = 60000L;
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//static int speed_zero_sent = 0;
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if (!send_update && gps_loc_update) {
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uint32_t lastTx = millis() - lastTxTime;
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currentHeading = gps.course.deg();
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lastTxDistance = TinyGPSPlus::distanceBetween(gps.location.lat(), gps.location.lng(), lastTxLatitude, lastTxLongitude);
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if (lastTx >= txInterval) {
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if (lastTxDistance > MinimumDistanceTx) {
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send_update = true;
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}
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}
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if (!send_update) {
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double headingDelta = abs(previousHeading - currentHeading);
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if (lastTx > MinimumTimeDeltaBeacon * 1000) {
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if (headingDelta > TurnDegrees && lastTxDistance > MinimumDistanceTx) {
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send_update = true;
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}
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}
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}
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}
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if (send_update && gps_loc_update) {
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float Tlat, Tlon;
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float Tspeed=0, Tcourse=0;
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Tlat = gps.location.lat();
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Tlon = gps.location.lng();
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Tcourse = gps.course.deg();
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Tspeed = gps.speed.knots();
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uint32_t aprs_lat, aprs_lon;
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aprs_lat = 900000000 - Tlat * 10000000;
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aprs_lat = aprs_lat / 26 - aprs_lat / 2710 + aprs_lat / 15384615;
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aprs_lon = 900000000 + Tlon * 10000000 / 2;
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aprs_lon = aprs_lon / 26 - aprs_lon / 2710 + aprs_lon / 15384615;
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String Ns, Ew, helper;
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if(Tlat < 0) { Ns = "S"; } else { Ns = "N"; }
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if(Tlat < 0) { Tlat= -Tlat; }
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if(Tlon < 0) { Ew = "W"; } else { Ew = "E"; }
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if(Tlon < 0) { Tlon= -Tlon; }
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String AprsPacketMsg = "!";
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AprsPacketMsg += "/";
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char helper_base91[] = {"0000\0"};
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int i;
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ax25_base91enc(helper_base91, 4, aprs_lat);
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for (i=0; i<4; i++) {
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AprsPacketMsg += helper_base91[i];
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}
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ax25_base91enc(helper_base91, 4, aprs_lon);
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for (i=0; i<4; i++) {
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AprsPacketMsg += helper_base91[i];
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}
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AprsPacketMsg += SYMBOL;
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if (SendAltitude) { // Send Altitude or... (APRS calculates Speed also)
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int Alt1, Alt2;
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int Talt;
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Talt = gps.altitude.feet();
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if(Talt>0){
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double ALT=log(Talt)/log(1.002);
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Alt1= int(ALT/91);
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Alt2=(int)ALT%91;
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}else{
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Alt1=0;
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Alt2=0;
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}
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AprsPacketMsg +=char(Alt1+33);
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AprsPacketMsg +=char(Alt2+33);
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AprsPacketMsg +=char(0x30+33);
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} else { // ... just send Course and Speed
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ax25_base91enc(helper_base91, 1, (uint32_t) Tcourse/4 );
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AprsPacketMsg += helper_base91[0];
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ax25_base91enc(helper_base91, 1, (uint32_t) (log1p(Tspeed)/0.07696));
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AprsPacketMsg += helper_base91[0];
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AprsPacketMsg += "\x47";
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}
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if (SendComment) {
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AprsPacketMsg += APRS_COMMENT;
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}
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Serial.print(F("GPS coordinates: ")); // Only for Serial Monitor
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Serial.print(Tlat, 6);
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Serial.print(F(", "));
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Serial.println(Tlon, 6);
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memset(tx_buffer, 0x00, sizeof tx_buffer);
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uint16_t size = 0;
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size = snprintf(reinterpret_cast<char *>(tx_buffer), sizeof tx_buffer, "\x3c\xff\x01%s>%s:%s", SRC_CALLSIGN, DST_CALLSIGN, AprsPacketMsg.c_str());
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Serial.print(millis()); // Only for Serial Monitor
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Serial.print(F(" transmitting: "));
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Serial.println(reinterpret_cast<char *>(tx_buffer));
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digitalWrite(LED_BUILTIN, HIGH);
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radio.transmit(tx_buffer, size);
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radio.finishTransmit();
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digitalWrite(LED_BUILTIN, LOW);
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lastTxLatitude = gps.location.lat();
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lastTxLongitude = gps.location.lng();
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previousHeading = currentHeading;
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lastTxDistance = 0.0;
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lastTxTime = millis();
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send_update = false;
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}
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if (gps_time_update) { // updating txInterval between Slow and FastRate or in between
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int curr_speed = (int)gps.speed.kmph();
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if (curr_speed < SlowSpeed) {
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txInterval = SlowRate * 1000;
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} else if (curr_speed > FastSpeed) {
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txInterval = FastRate * 1000;
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} else {
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txInterval = min(SlowRate, (FastSpeed * FastRate / curr_speed)) * 1000;
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}
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}
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} |