Published March 13, 2021 © CC BY-NC

Universal telemetry for rc plane with android application

Universal telemetry for rc plane with android application, GPS, battery voltage, speed and more with vocal query and vocal answer.

IntermediateProtip2 hours2,814

Things used in this project

Hardware components

ESP32 LoRa OLED

GPS NEO6MV2

Resistor 10k ohm

Seeed Studio Grove - Barometer Sensor (BMP280)

Software apps and online services

Arduino IDE

MIT App Inventor 2

Hand tools and fabrication machines

Soldering iron (generic)

Premium Female/Male Extension Jumper Wires, 40 x 6" (150mm)

Solder Wire, Lead Free

Story

My project is about telemetry for rc planes, in aeromodelism it's important to know some flight parameters like battery level or fuel level, height of te flight, speed o plane and much more.

When you flight a plane you can't look in the same time a screen with parameters and where is the plane (if you can make that, you are a cameleon) and you must don't stop looking at the plane or the plane go quickly to the ground and it is destroyed.

Some radio manufacturers offer voice telemetry on their transmitter, but these are top of the range models and very expensive.

For this reason I thought of making a voice telemetry which is compatible with the different brands, low cost and completely independent of the manufacturers (each brand has its communication protocol, SBUS, iBus etc.., so difficult to make a universal model).

I had already made prototypes with LILYGO TTGO LORA 868Mhz ESP32 and so I chose this card.

_long distance transmission (more than 500 meters in open field)

_ important memory (32Mo)

a lot of numbers of connection ports with integrated screen
wifi and bluetooth
low weight and integrated battery
small dimension and small weight (85 grams for the transmitter with battery)

transmitter weight with battery and gps

dimension of the receiver

The android smartphone application was developed with MIT APP INVENTOR 2, which allowed me to easily integrate voice alarms and voice requests.

For the moment the voice alarms are:

_ Battery (threshold set according to the type of battery 3S, 4S etc.)

_Height of the plane (fixed at the start)

_ Flight time (fixed at departure)

The triggering of the start of the countdown for the flight time is either vocal or automatic according to the height / speed

here is the alarm screen

Alarm screen

On the main screen the flight parameters are all displayed as well as a map of the plane's trajectory in real time.

The voice interrogations are for the moment:

_Battery voltage

_height o te plane

_ Speed

_flight time

Other interrogations and alarms will be added depending on the added sensors (variometer, air speed with pitot tube, gyroscope, etc.)

main screen

The flight data are recorded on the smartphone for later use (trajectory plotting in google earth, speed variation, battery voltage, etc.)

comparison with GPS Canmore GT730FL

Height

Speed

the result

Some video with test in flight

first test only for vocals alarms

second test flight with comparison with canmore gps

and with voice interrogations

thank's for reading and watching the videos, I hope you make it, it is very helpful for aeromodelers

Yves MORELE

Update: adding barometric sensor and variometer in the Android App with sound and vocal query

and the vario sound test in video

update screen with gauges

tutorial to display in google earth acquisition data in text format from the telemetry

A new UPDATE

a good friend from the Netherlands tested the system and the flying field being located near an airport there was a lot of radio disturbance which prevented the proper functioning of the system. he therefore added a CRC check and modified the acquisition delay with no blocking in the event of bad data for the backup. I attach Frank Reijn's files, he is a great pilot and he has several passions that I let you discover on his Youtube https://www.youtube.com/c/FrankReijn

Schematics

Code

//Libraries for LoRa
#include <SPI.h>
#include <LoRa.h>
#include <TinyGPS++.h>
TinyGPSPlus gps;
//Libraries for OLED Display
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <HardwareSerial.h>
HardwareSerial GPSSerial(1);
//define the pins used by the LoRa transceiver module
#define SCK 5
#define MISO 19
#define MOSI 27
#define SS 18
#define RST 14
#define DIO0 26
#define dP = 34;
#define GPS_TX 22
#define GPS_RX 23



float maxspeed = 0, speed1 = 0;
int maxhigh = 0, high1 = 0;
int maxsatelite = 0, satelite1 = 0;

int sensorValue = 0;  
  float meters ;


#define BAND 866E6

//OLED pins
#define OLED_SDA 4
#define OLED_SCL 15 
#define OLED_RST 16
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

//packet counter
int counter = 0;
const int potPin = 34;
double Vout;

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RST);

void setup() {
    GPSSerial.begin(9600, SERIAL_8N1, 22, 23);
  //reset OLED display via software
  pinMode(OLED_RST, OUTPUT);
  digitalWrite(OLED_RST, LOW);
  delay(20);
  digitalWrite(OLED_RST, HIGH);

  //initialize OLED
  Wire.begin(OLED_SDA, OLED_SCL);
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3c, false, false)) { // Address 0x3C for 128x32
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }
  
  display.clearDisplay();
  display.setTextColor(WHITE);
  display.setTextSize(1);
  display.setCursor(0,0);
  display.print("LORA SENDER ");
  display.display();
  
  //initialize Serial Monitor
  Serial.begin(9600);
 
  

  //SPI LoRa pins
  SPI.begin(SCK, MISO, MOSI, SS);
  //setup LoRa transceiver module
  LoRa.setPins(SS, RST, DIO0);
  
  if (!LoRa.begin(BAND)) {
   // Serial.println("Starting LoRa failed!");
    while (1);
  }
  
  display.setCursor(0,10);
  display.print("LoRa Initializing OK!");
  display.display();
  delay(2000);
}

void loop() {
   
  Vout = float(((analogRead(potPin))*(5/4095.00)*8.4803-0.0894)*0.7167143); 
 updateValues();
  //Send LoRa packet to receiver
  LoRa.beginPacket();
  LoRa.print("#"+(String(gps.time.hour()+1)+(":")+(gps.time.minute())+(":")+(gps.time.second())+","+String(gps.location.lat(), 6)+","+String(gps.location.lng(), 6)+(",")+String(gps.altitude.meters(),0)+(",")+String(speed1)));
  LoRa.print(",");
  LoRa.print(Vout);
  LoRa.print(",");
  LoRa.print(counter);
  LoRa.endPacket();
  
  display.clearDisplay();
  display.setCursor(0,0);
  display.print("Voltage Batt : ");
  display.print(Vout);
  display.setCursor(0,9);
  display.print("alitude : ");
  display.print(gps.altitude.meters());             
  display.setCursor(0,18);
   display.print("latitude : ");
  display.print(gps.location.lat() );
  display.setCursor(0,27);
  display.print("longitude : ");
  display.print(gps.location.lng());
   display.setCursor(0,36);
  display.print("vitesse : ");
  display.print(speed1 );
   display.setCursor(0,45);
  display.print("Heure : ");
  display.print(String(gps.time.hour()+1)+(":")+(gps.time.minute())+(":")+(gps.time.second()) );
   display.setCursor(0,54);
  display.print("Date : ");
  display.print(String(gps.date.day())+("/")+(gps.date.month())+("/")+(gps.date.year()) );


  
  display.display();



  
  counter++;
  
  delay(100);
}

void updateValues()
{


while (GPSSerial.available() > 0){
  int data = GPSSerial.read();
    if (gps.encode(data))
   {
      
//Serial.println(GPSSerial.read());
//Serial.println(gps.encode(GPSSerial.read()));
gps.encode(GPSSerial.read());
 Serial.write(GPSSerial.read());
float meters = (gps.altitude.meters());
  
  int airSpeed =( gps.speed.kmph());

speed1 = (gps.speed.kmph());
  //if ( speed1 > maxspeed) {
   // maxspeed = speed1;
  //}
  String Temps=String(gps.time.hour()+1)+(":")+(gps.time.minute())+(":")+(gps.time.second());
  String Date=String(gps.date.day())+("/")+(gps.date.month())+("/")+(gps.date.year());
}
}
}

//Librairies pour LoRa

#include <SPI.h>
#include <LoRa.h>

#include "BluetoothSerial.h"

#if !defined(CONFIG_BT_ENABLED) || !defined(CONFIG_BLUEDROID_ENABLED)
#error Bluetooth is not enabled! Please run `make menuconfig` to and enable it
#endif


BluetoothSerial SerialBT;

//Librairies pour ecran OLED 

#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

//definition  des  pins utiliss par l'emetteur  LoRa 

#define SCK 5
#define MISO 19
#define MOSI 27
#define SS 18
#define RST 14
#define DIO0 26

//433E6 pour Asie
//866E6 pour Europe
//915E6 pour Amerique du nord
#define BAND 866E6

// pins ecran OLED

#define OLED_SDA 4
#define OLED_SCL 15 
#define OLED_RST 16
#define SCREEN_WIDTH 128 // largeur OLED , en  pixels
#define SCREEN_HEIGHT 64 // hauteur OLED , en pixels

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RST);

String LoRaData;

void setup() { 
  
  //reset OLED display 
  pinMode(OLED_RST, OUTPUT);
  digitalWrite(OLED_RST, LOW);
  delay(20);
  digitalWrite(OLED_RST, HIGH);
  
  //initialize OLED
  Wire.begin(OLED_SDA, OLED_SCL);
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3c, false, false)) { // Address 0x3C for 128x32
    Serial.println(F("SSD1306 allocation mauvaise"));
    for(;;); // boucle en permanence
  }

  display.clearDisplay();
  display.setTextColor(WHITE);
  display.setTextSize(1);
  display.setCursor(0,0);
  display.print("LORA RECEIVER ");
  display.display();
  
  //initialize Serial Monitor
  Serial.begin(115200);
 SerialBT.begin("ESP32test"); // nom du peripherique Bluetooth 
  Serial.println("LoRa Receiver Test");
  
  //SPI LoRa pins
  SPI.begin(SCK, MISO, MOSI, SS);
  //setup LoRa transceiver module
  LoRa.setPins(SS, RST, DIO0);

  if (!LoRa.begin(BAND)) {
    Serial.println("Starting LoRa failed!");
    while (1);
  }
  Serial.println("LoRa Initializing OK!");
  display.setCursor(0,10);
  display.println("LoRa Initializing OK!");
  display.display();  
}

void loop() {

  //essai analyse pauet reu
  int packetSize = LoRa.parsePacket();
  if (packetSize) {
    //reception paquet
    Serial.print("Received packet ");

    //lecture paquet
    while (LoRa.available()) {
      LoRaData = LoRa.readString();
    
    
    }

   // deinition RSSI 
  int rssi = LoRa.packetRssi();
   
  
    // SerialBT.println(LoRa.packetRssi());
    
 //   lecture donnes reues

String readString = (LoRaData);

// divise la chaine lue par un delimiteur predefini qui est la virgule 

int delimiter, delimiter_1, delimiter_2,  delimiter_3 ,  delimiter_4,  delimiter_5,  delimiter_6 ;

delimiter = readString.indexOf("#");
delimiter_1 = readString.indexOf(",", delimiter + 1);
delimiter_2 = readString.indexOf(",", delimiter_1 +1);
delimiter_3 = readString.indexOf(",", delimiter_2 +1);
delimiter_4 = readString.indexOf(",", delimiter_3 +1);
delimiter_5 = readString.indexOf(",", delimiter_4 +1);
delimiter_6 = readString.indexOf(",", delimiter_5 +1);


// definition des noms de variables avec les delimiteurs pour les sous chaines

String heure = readString.substring(delimiter + 1, delimiter_1);
String latitude = readString.substring(delimiter_1 + 1, delimiter_2);
String longitude = readString.substring(delimiter_2 + 1, delimiter_3);
String altitude1 = readString.substring(delimiter_3 + 1, delimiter_4);
String vitesse = readString.substring(delimiter_4 + 1, delimiter_5);
String voltage = readString.substring(delimiter_5 + 1, delimiter_6);
String RSSI = String(rssi);


   display.clearDisplay();
   display.setCursor(0,0);
   display.print("Heure  ");
   display.print(heure);
   
   SerialBT.println("Heure="+ String(heure)+"="+"Latitude="+String(latitude)+"="+"Longitude="+String(longitude)+"="+"Altitude="+String(altitude1)+"="+"vitesse="+String(vitesse)+"="+"VoltageBatt="+String(voltage)+"="+"RSSI="+String(RSSI));
  delay(500);
    
   display.setCursor(0,10);
   display.print("Latitude = ");
   display.print(latitude);
   
  
  
   display.setCursor(0,20);
   display.print("Longitude : ");
   display.print(longitude);
   display.setCursor(0,30);
   display.print("Altitude : ");
   display.print(altitude1);
   display.setCursor(0,40);
   display.print("vitesse : ");
    display.print(vitesse);
   display.setCursor(0,50);
   display.print("Voltage Batt : ");
    display.print(voltage);
    display.setCursor(0,60);
   display.print("RSSI : ");
   display.print(rssi);
   display.display();   
   
   delay(500);
  
 
  }
  }

//Libraries for LoRa
#include <SPI.h>
#include <LoRa.h>
#include <TinyGPS++.h>
TinyGPSPlus gps;
//Libraries for OLED Display
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <Adafruit_BMP280.h>


Adafruit_BMP280 bmp; // I2C
#include <HardwareSerial.h>
HardwareSerial GPSSerial(1);
//define the pins used by the LoRa transceiver module
#define SCK 5
#define MISO 19
#define MOSI 27
#define SS 18
#define RST 14
#define DIO0 26
#define dP = 34;
#define GPS_TX 2
#define GPS_RX 23

// CODE FROM ANDREI's Project https://www.instructables.com/id/DIY-Arduino-Variometer-for-Paragliding
float vario = 0;    
byte samples = 40;    
byte maxsamples = 50;
float alt[51];                                                       
float tim[51];  
float tempo = millis();             // Beschreibung einer Tempovariablen vom Typ float und Zuweisung eines Wertes mit der Funktion millis () - Zhlt die Zeit ab Programmstart in Millisekunden
float N1 = 0;                       // Variable zur Mittelwertbildung                                 
float N2 = 0;                       // Variable zur Mittelwertbildung                                
float N3 = 0;                       // Variable zur Mittelwertbildung                                 
float D1 = 0;                       // Variable zur Mittelwertbildung                               
float D2 = 0;                       // Variable zur Mittelwertbildung       



float maxspeed = 0, speed1 = 0;
int maxhigh = 0, high1 = 0;
int maxsatelite = 0, satelite1 = 0;
float altitude0BMP280=0;
float       GPS_Distance;

int sensorValue = 0;  
  float meters ;
  float metersbmp280 ;
float temperaturebmp280 ;

#define BAND 866E6

//OLED pins
#define BMP_SDA 21
#define BMP_SCL 22
#define OLED_SDA 4
#define OLED_SCL 15 
#define OLED_RST 16
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

//packet counter
int counter = 0;
const int potPin = 34;
double Vout;
int Time_GPS_seconds;

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RST);



void setup() {
    GPSSerial.begin(9600, SERIAL_8N1, 23, 2);

    if (!bmp.begin(0x76)) {
    Serial.println(F("Could not find a valid BMP280 sensor, check wiring!"));
    while (1);
  }
  //reset OLED display via software
  pinMode(OLED_RST, OUTPUT);
  digitalWrite(OLED_RST, LOW);
  delay(20);
  digitalWrite(OLED_RST, HIGH);


  
 /* Default settings from datasheet. */
  bmp.setSampling(Adafruit_BMP280::MODE_NORMAL,     /* Operating Mode. */
                  Adafruit_BMP280::SAMPLING_X2,     /* Temp. oversampling */
                  Adafruit_BMP280::SAMPLING_X16,    /* Pressure oversampling */
                  Adafruit_BMP280::FILTER_X16,      /* Filtering. */
                  Adafruit_BMP280::STANDBY_MS_500); /* Standby time. */

altitude0BMP280=(bmp.readAltitude(1023.5));

  //initialize OLED
  Wire.begin(OLED_SDA, OLED_SCL);
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3c, false, false)) { // Address 0x3C for 128x32
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }
  
  display.clearDisplay();
  display.setTextColor(WHITE);
  display.setTextSize(1);
  display.setCursor(0,0);
  display.print("LORA SENDER ");
  display.display();
  
  //initialize Serial Monitor
  Serial.begin(9600);
 
  

  //SPI LoRa pins
  SPI.begin(SCK, MISO, MOSI, SS);
  //setup LoRa transceiver module
  LoRa.setPins(SS, RST, DIO0);
  
  if (!LoRa.begin(BAND)) {
   // Serial.println("Starting LoRa failed!");
    while (1);
  }
  
  display.setCursor(0,10);
  
  
 
  display.print("LoRa Initializing OK!");
  display.display();
  delay(2000);

  
  
}

void loop() {
  Wire.begin(BMP_SDA, BMP_SCL);
   bmp280();
  Vout = float(((analogRead(potPin))*(5/4095.00)*8.4803-0.0894)*0.7167143); 

  Serial.print(F("Temperature = "));
    Serial.print(bmp.readTemperature());
    Serial.println(" *C");

    Serial.print(F("Pressure = "));
    Serial.print(bmp.readPressure());
    Serial.println(" Pa");

    Serial.print(F("Approx altitude = "));
    Serial.print(bmp.readAltitude(1030)); /* Adjusted to local forecast! */
    Serial.println(" m");

 updateValues();

  VarioMSCalculation();
  
  //Send LoRa packet to receiver
  LoRa.beginPacket();
  LoRa.print("#"+(String(gps.time.hour()+2)+(":")+(gps.time.minute())+(":")+(gps.time.second())+","+String(gps.location.lat(), 6)+","+String(gps.location.lng(), 6)+(",")+String(gps.altitude.meters(),0)+(",")+String(gps.speed.kmph())));
  LoRa.print(",");
  LoRa.print(Vout);
  LoRa.print(",");
  LoRa.print((metersbmp280-altitude0BMP280),1 );
  LoRa.print(",");
  LoRa.print(temperaturebmp280,0  );
  LoRa.print(",");
  LoRa.print(vario);
  LoRa.print(",");
  LoRa.print(GPS_Distance);
  LoRa.print(",");
  LoRa.print(String(Time_GPS_seconds));
  LoRa.print(",");
  LoRa.print(counter);
  LoRa.endPacket();



  
  Wire.begin(OLED_SDA, OLED_SCL);
  display.clearDisplay();
  display.setCursor(0,0);
  display.print("Vbat:");
  display.print(Vout);
  display.print(" Alt:");
  display.print(gps.altitude.meters(),0); 
  display.setCursor(0,9);
  display.print("lat : ");
  display.print(gps.location.lat(),4 );            
  display.setCursor(0,18);
  display.print(" long : ");
  display.print(gps.location.lng(),4);
  display.setCursor(0,27);
  display.print("Vitesse: ");
  display.print((gps.speed.kmph()) );
   display.setCursor(0,36);
  display.print("Heure : ");
  display.print(String(gps.time.hour()+2)+(":")+(gps.time.minute())+(":")+(gps.time.second()) );
   display.setCursor(0,45);
  display.print("Vario : ");
  display.print (vario);
  display.print("    m/s ");
   display.setCursor(0,54);
  display.print("Hbmp:");
  display.print((metersbmp280-altitude0BMP280),1 );
display.print("  Tbmp:");
  display.print(temperaturebmp280,0 );

  
  display.display();



  
  counter++;
  
  delay(100);
}

void updateValues()
{


while (GPSSerial.available() > 0){
  int data = GPSSerial.read();
  Serial.println(data);
   

    if (gps.encode(data))
   {
    float Starting_Latitude = 0;
  float Starting_Longitude = 0;  

gps.encode(GPSSerial.read());
 Serial.write(GPSSerial.read());
float meters = (gps.altitude.meters());
  
  int airSpeed =( gps.speed.kmph());
  
if ( gps.location.lat() > 0.0 and gps.location.lng() > 0.0)
  {
   Starting_Longitude = gps.location.lng();
    Starting_Latitude = gps.location.lat();
    
  }
  
     
  GPS_Distance = (gps.distanceBetween( gps.location.lat(), gps.location.lng(), Starting_Latitude, Starting_Longitude)) ;
   
speed1 = (gps.speed.kmph(),0);
  
  String Temps=String(gps.time.hour()+2)+(":")+(gps.time.minute())+(":")+(gps.time.second());
  String Date=String(gps.date.day())+("/")+(gps.date.month())+("/")+(gps.date.year());
  Time_GPS_seconds=((gps.time.hour()+2)*3600)+((gps.time.minute())*60)+(gps.time.second());
}
}
}

void bmp280()
{
  metersbmp280=(bmp.readAltitude(1023.5));
  temperaturebmp280=(bmp.readTemperature());
}

// Variofunktion FROM ANDREI's Project https://www.instructables.com/id/DIY-Arduino-Variometer-for-Paragliding
void VarioMSCalculation(){
  tempo = millis();                                                       // Beschreibung einer Tempovariablen vom Typ float und Zuweisung eines Wertes mit der Funktion millis () - Zhlt die Zeit ab Programmstart in Millisekunden
  N1 = 0;                                                                 // Variable zur Mittelwertbildung
  N2 = 0;                                                                 // Variable zur Mittelwertbildung
  N3 = 0;                                                                 // Variable zur Mittelwertbildung
  D1 = 0;                                                                 // Variable zur Mittelwertbildung
  D2 = 0;                                                                 // Variable zur Mittelwertbildung
  
  ////// ZERO VARIO /////
  vario = 0;       
  
  
  for(int cc=1; cc<=maxsamples; cc++)                                     // Averager 
  {                                                                       // 
    alt[(cc-1)] = alt[cc];                                                // http://www.instructables.com/id/GoFly-paraglidinghanglidinggliding-altimeter-v/?ALLSTEPS
    tim[(cc-1)] = tim[cc];                                                // http://redhats.ru/variometer-arduino-2015/
  }                                                                       //
                                                                          //
  alt[maxsamples] = bmp.readAltitude();                                   //
  tim[maxsamples] = tempo;                                                //
  float stime = tim[maxsamples-samples];                                  //
                                                                          //
  for(int cc=(maxsamples-samples); cc<maxsamples; cc++)                   //
  {                                                                       //
    N1+=(tim[cc]-stime)*alt[cc];                                          //
    N2+=(tim[cc]-stime);                                                  //
    N3+=(alt[cc]);                                                        //
    D1+=(tim[cc]-stime)*(tim[cc]-stime);                                  //
    D2+=(tim[cc]-stime);                                                  //
  }                                                                       // Durchschnittliches Krperende 
  
  /////VARIO VALUES CALCULATING /////
  vario=1000*((samples*N1)-N2*N3)/(samples*D1-D2*D2);                     // BERECHNUNG VON VARIOMETERWERTEN

  

}

//Librairies pour LoRa

#include <SPI.h>
#include <LoRa.h>

#include "BluetoothSerial.h"

#if !defined(CONFIG_BT_ENABLED) || !defined(CONFIG_BLUEDROID_ENABLED)
#error Bluetooth is not enabled! Please run `make menuconfig` to and enable it
#endif


BluetoothSerial SerialBT;

//Librairies pour ecran OLED 

#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

//definition  des  pins utiliss par l'emetteur  LoRa 

#define SCK 5
#define MISO 19
#define MOSI 27
#define SS 18
#define RST 14
#define DIO0 26

//433E6 pour Asie
//866E6 pour Europe
//915E6 pour Amerique du nord
#define BAND 866E6

// pins ecran OLED

#define OLED_SDA 4
#define OLED_SCL 15 
#define OLED_RST 16
#define SCREEN_WIDTH 128 // largeur OLED , en  pixels
#define SCREEN_HEIGHT 64 // hauteur OLED , en pixels

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RST);

String LoRaData;

void setup() { 
  
  //reset OLED display 
  pinMode(OLED_RST, OUTPUT);
  digitalWrite(OLED_RST, LOW);
  delay(20);
  digitalWrite(OLED_RST, HIGH);
  
  //initialize OLED
  Wire.begin(OLED_SDA, OLED_SCL);
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3c, false, false)) { // Address 0x3C for 128x32
    Serial.println(F("SSD1306 allocation mauvaise"));
    for(;;); // boucle en permanence
  }

  display.clearDisplay();
  display.setTextColor(WHITE);
  display.setTextSize(1);
  display.setCursor(0,0);
  display.print("LORA RECEIVER ");
  display.display();
  
  //initialize Serial Monitor
  Serial.begin(115200);
 SerialBT.begin("ESP32test"); // nom du peripherique Bluetooth 
  Serial.println("LoRa Receiver Test");
  
  //SPI LoRa pins
  SPI.begin(SCK, MISO, MOSI, SS);
  //setup LoRa transceiver module
  LoRa.setPins(SS, RST, DIO0);

  if (!LoRa.begin(BAND)) {
    Serial.println("Starting LoRa failed!");
    while (1);
  }
  Serial.println("LoRa Initializing OK!");
  display.setCursor(0,10);
  display.println("LoRa Initializing OK!");
  display.display();  

  
}
void loop() {

  //essai analyse pauet reu
  int packetSize = LoRa.parsePacket();
  if (packetSize) {
    //reception paquet
    Serial.print("Received packet ");

    //lecture paquet
    while (LoRa.available()) {
      LoRaData = LoRa.readString();
    
    
    }

   // deinition RSSI 
  int rssi = LoRa.packetRssi();
   
  
    // SerialBT.println(LoRa.packetRssi());
    
 //   lecture donnes reues

String readString = (LoRaData);

// divise la chaine lue par un delimiteur predefini qui est la virgule 

int delimiter, delimiter_1, delimiter_2,  delimiter_3 ,  delimiter_4,  delimiter_5,  delimiter_6, delimiter_7, delimiter_8 , delimiter_9, delimiter_10 , delimiter_11;

delimiter = readString.indexOf("#");
delimiter_1 = readString.indexOf(",", delimiter + 1);
delimiter_2 = readString.indexOf(",", delimiter_1 +1);
delimiter_3 = readString.indexOf(",", delimiter_2 +1);
delimiter_4 = readString.indexOf(",", delimiter_3 +1);
delimiter_5 = readString.indexOf(",", delimiter_4 +1);
delimiter_6 = readString.indexOf(",", delimiter_5 +1);
delimiter_7 = readString.indexOf(",", delimiter_6 +1);
delimiter_8 = readString.indexOf(",", delimiter_7 +1);
delimiter_9 = readString.indexOf(",", delimiter_8 +1);
delimiter_10 = readString.indexOf(",", delimiter_9 +1);
delimiter_11 = readString.indexOf(",", delimiter_10 +1);

// definition des noms de variables avec les delimiteurs pour les sous chaines

String heure = readString.substring(delimiter + 1, delimiter_1);
String latitude = readString.substring(delimiter_1 + 1, delimiter_2);
String longitude = readString.substring(delimiter_2 + 1, delimiter_3);
String altitude1 = readString.substring(delimiter_3 + 1, delimiter_4);
String vitesse = readString.substring(delimiter_4 + 1, delimiter_5);
String voltage = readString.substring(delimiter_5 + 1, delimiter_6);
String Hbmp = readString.substring(delimiter_6 + 1, delimiter_7);
String Tbmp = readString.substring(delimiter_7 + 1, delimiter_8);
String Vario = readString.substring(delimiter_8 + 1, delimiter_9);
String Distance = readString.substring(delimiter_9 + 1, delimiter_10);
String Time_gps_seconds = readString.substring(delimiter_10 + 1, delimiter_11);

String RSSI = String(rssi);


   display.clearDisplay();
   display.setCursor(0,0);
   display.print("Lat:");
   display.print(latitude);
   
   SerialBT.println("Heure="+ String(heure)+"="+"Latitude="+String(latitude)+"="+"Longitude="+String(longitude)+"="+"Altitude="+String(altitude1)+"="+"vitesse="+String(vitesse)+"="+"VoltageBatt="+String(voltage)+"="+"Hbmp="+String(Hbmp)+"="+"Tbmp="+String(Tbmp)+"="+"Vario="+String(Vario)+"="+"Distance="+String(Distance)+"=""Secondes="+String(Time_gps_seconds)+"="+"RSSI="+String(RSSI));
  delay(500);
    
   display.setCursor(0,10);
   display.print("Long:");
   display.print(longitude);
   display.setCursor(0,20);
    display.print("Alt:");
   display.print(altitude1);
    display.print("  Vgps:");
    display.print(vitesse);
    display.setCursor(0,30);
    display.print("Hbmp :");
    display.print(Hbmp); 
   display.setCursor(0,40);
    display.print("Vario:");
    display.print(Vario);
    display.print(" Dist:");
    display.print(Distance);
    display.setCursor(0,50);
  display.print("Vbat ");
    display.print(voltage);
    display.print(" RSSI:");
    display.print(rssi);
   
   display.display();   
   
   delay(500);
  
 
  }
  }

Credits

yvesmorele

9 projects • 47 followers

chemical scientist

Universal telemetry for rc plane with android application

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Custom parts and enclosures

emitter top

emitter bottom

Schematics

schematic without vario

UPDATE with vario

Code

TRANSMITTER

RECEIVER

android App update vario source code mit app inventor

Frank Reijn udate with CRC

Frank Reijn udate with CRC receiver

android App

telemetrie_lora_emetteur_yves_v1_1_a.ino

telemetrie_lora_recepteur_yves_v1_1_a.ino

android App update vario

tiny gps++

Credits

yvesmorele

Comments

Embed the widget on your own site

Universal telemetry for rc plane with android application

Universal telemetry for rc plane with android application

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Custom parts and enclosures

emitter top

emitter bottom

Schematics

schematic without vario

UPDATE with vario

Code

TRANSMITTER

RECEIVER

android App update vario source code mit app inventor

Frank Reijn udate with CRC

Frank Reijn udate with CRC receiver

android App

telemetrie_lora_emetteur_yves_v1_1_a.ino

telemetrie_lora_recepteur_yves_v1_1_a.ino

android App update vario

tiny gps++

Credits

yvesmorele

Comments

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