LoRa_APRS_Tracker/src/LoRa_APRS_Tracker.cpp

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#include <Arduino.h>
#include <LoRa.h>
#include <APRS-Decoder.h>
#include <TinyGPS++.h>
#include "settings.h"
#include "display.h"
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#include "pins.h"
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#include <TimeLib.h>
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#ifdef TTGO_T_Beam_V1_0
#include <axp20x.h>
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void setup_axp();
AXP20X_Class axp;
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#endif
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HardwareSerial ss(1);
TinyGPSPlus gps;
void setup_gps();
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String create_lat_aprs(RawDegrees lat);
String create_long_aprs(RawDegrees lng);
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void setup_lora();
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static time_t nowTimeStamp = -1;
static time_t nextUpdateTimeStamp = -1;
static bool send_update = true;
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// cppcheck-suppress unusedFunction
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void setup()
{
Serial.begin(115200);
setup_display();
delay(500);
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Serial.println("[INFO] LoRa APRS Tracker by OE5BPA (Peter Buchegger)");
show_display("OE5BPA", "LoRa APRS Tracker", "by Peter Buchegger", 2000);
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#ifdef TTGO_T_Beam_V1_0
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setup_axp();
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#endif
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setup_gps();
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setup_lora();
delay(500);
}
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String toDoubleInt(int number)
{
if(number < 10)
{
return "0" + String(number);
}
return String(number);
}
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// cppcheck-suppress unusedFunction
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void loop()
{
while (ss.available() > 0)
{
char c = ss.read();
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//Serial.print(c);
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gps.encode(c);
}
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bool gps_time_update = false;
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if(gps.time.isUpdated())
{
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gps_time_update = true;
}
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if(gps.time.isValid())
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{
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setTime(gps.time.hour(),gps.time.minute(),gps.time.second(),gps.date.day(),gps.date.month(),gps.date.year());
nowTimeStamp = now();
if (nextUpdateTimeStamp <= nowTimeStamp || nextUpdateTimeStamp == -1)
{
send_update = true;
}
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}
if(send_update && gps.location.isValid() && gps.location.isUpdated())
{
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nextUpdateTimeStamp = nowTimeStamp + (BEACON_TIMEOUT * 60);
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send_update = false;
APRSMessage msg;
msg.setSource(CALL);
msg.setDestination("APLT0");
String lat = create_lat_aprs(gps.location.rawLat());
String lng = create_long_aprs(gps.location.rawLng());
msg.getAPRSBody()->setData(String("=") + lat + "/" + lng + ">" + BEACON_MESSAGE);
String data = msg.encode();
Serial.println(data);
show_display("<< TX >>", data);
LoRa.beginPacket();
// Header:
LoRa.write('<');
LoRa.write(0xFF);
LoRa.write(0x01);
// APRS Data:
LoRa.write((const uint8_t *)data.c_str(), data.length());
LoRa.endPacket();
}
if(gps_time_update)
{
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show_display(CALL,
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String("Time: ") + toDoubleInt(gps.time.hour()) + String(":") + toDoubleInt(gps.time.minute()) + String(":") + toDoubleInt(gps.time.second()),
String("Date: ") + toDoubleInt(gps.date.day()) + String(".") + toDoubleInt(gps.date.month()) + String(".") + gps.date.year(),
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String("Sat's: ") + gps.satellites.value() + String(" HDOP: ") + gps.hdop.hdop(),
String("Lat: ") + gps.location.lat() + String(" Lng: ") + gps.location.lng(),
String("") + create_lat_aprs(gps.location.rawLat()) + String(" ") + create_long_aprs(gps.location.rawLng())
);
}
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if(millis() > 5000 && gps.charsProcessed() < 10)
{
Serial.println("No GPS detected!");
}
}
#ifdef TTGO_T_Beam_V1_0
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void setup_axp()
{
Wire.begin(SDA, SCL);
if (!axp.begin(Wire, AXP192_SLAVE_ADDRESS))
{
Serial.println("LoRa-APRS / Init / AXP192 Begin PASS");
} else {
Serial.println("LoRa-APRS / Init / AXP192 Begin FAIL");
}
axp.setPowerOutPut(AXP192_LDO2, AXP202_ON); // LORA
axp.setPowerOutPut(AXP192_LDO3, AXP202_ON); // GPS
axp.setPowerOutPut(AXP192_DCDC1, AXP202_ON); // OLED
axp.setDCDC1Voltage(3300);
}
#endif
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void setup_lora()
{
Serial.println("[INFO] Set SPI pins!");
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SPI.begin(LORA_SCK, LORA_MISO, LORA_MOSI, LORA_CS);
LoRa.setPins(LORA_CS, LORA_RST, LORA_IRQ);
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Serial.println("[INFO] Set LoRa pins!");
long freq = 433775000;
Serial.print("[INFO] frequency: ");
Serial.println(freq);
if (!LoRa.begin(freq)) {
Serial.println("[ERROR] Starting LoRa failed!");
show_display("ERROR", "Starting LoRa failed!");
while (1);
}
LoRa.setSpreadingFactor(12);
LoRa.setSignalBandwidth(125E3);
LoRa.setCodingRate4(5);
LoRa.enableCrc();
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LoRa.setTxPower(20);
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Serial.println("[INFO] LoRa init done!");
show_display("INFO", "LoRa init done!", 2000);
}
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void setup_gps()
{
ss.begin(9600, SERIAL_8N1, GPS_TX, GPS_RX);
}
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String create_lat_aprs(RawDegrees lat)
{
char str[20];
char n_s = 'N';
if(lat.negative)
{
n_s = 'S';
}
sprintf(str, "%02d%05.2f%c", lat.deg, lat.billionths / 1000000000.0 * 60.0, n_s);
String lat_str(str);
return lat_str;
}
String create_long_aprs(RawDegrees lng)
{
char str[20];
char e_w = 'E';
if(lng.negative)
{
e_w = 'W';
}
sprintf(str, "%03d%05.2f%c", lng.deg, lng.billionths / 1000000000.0 * 60.0, e_w);
String lng_str(str);
return lng_str;
}