Hi, I am new in Arduino. I am using ESP32, pulse sensor, gps module, mq-2 gas sensor, k-type thermocouple and oled in my project. I already compile all the coding, but unfortunately when I upload to the board, gps module not functioning, not getting the latitude and longitude reading. Can anybody help me to check the code?
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include "WiFi.h"
#include "ThingSpeak.h"
#include "max6675.h"
#include <TinyGPS++.h>
#define wifiname "MYwifi "
#define wifipassword "testwifi"
#define timeoutTime 20000
#define ChannelID 2520131
#define ChannelAPIkey "PBTFO881TXOB98BH"
WiFiClient client;
#define GPSRX 16
#define GPSTX 17
#define GPSserial Serial2
TinyGPSPlus gps;
unsigned long attemptTime;
int thermoSO = 19;
int thermoCS = 23;
int thermoSCK = 5;
int analogpin = 32; //AO gas sensor
int buzzerpin = 13;
int buzzerdelay = 50;
int a = 100;
float valueCelcius;
float gasvalue;
float latitude;
float longitude;
int ledpin = 18;
Adafruit_SSD1306 display(128, 64, &Wire, -1);
MAX6675 thermocouple(thermoSCK, thermoCS, thermoSO);
HardwareSerial neogps(1);
void oledsetup(){
if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
Serial.println(F("SSD1306 allocation failed"));
for(;;); // don't proceed, loop forever
}
}
void connectWiFi(){
Serial.print("Connecting to wifi");
WiFi.mode(WIFI_STA);
WiFi.begin(wifiname, wifipassword);
attemptTime = millis();
while(WiFi.status() != WL_CONNECTED && millis() - attemptTime < timeoutTime){
Serial.print(".");
delay(100);
}
if (WiFi.status()!= WL_CONNECTED){
Serial.println(" Failed to connect! ");
}
else{
Serial.print(" Connected yeayy ");
Serial.println(WiFi.localIP());
}
}
void gpslatlong(){
if(gps.location.isValid() == 1){
latitude = gps.location.lat();
longitude = gps.location.lng();
display.clearDisplay();
display.setTextSize(1);
display.setTextColor(WHITE);
display.setCursor(0, 0);
display.println(latitude, 5);
display.setCursor(50, 0);
display.println(longitude, 5);
display.display();
}
else{
display.clearDisplay();
display.setTextColor(WHITE);
display.setCursor(0, 50);
display.setTextSize(1);
display.println("Waiting for satellite");
display.display();
}
}
void gpsdata(){
boolean newData = false;
for (unsigned long start = millis(); millis() - start < 10000;)
{
while (neogps.available())
{
if (gps.encode(neogps.read()))
{
newData = true;
}
}
}
// if newData is true
if(newData == true)
{
newData = true;
Serial.println(gps.satellites.value());
gpslatlong();
}
else
{
display.clearDisplay();
display.setTextColor(WHITE);
display.setCursor(0, 50);
display.setTextSize(1);
display.print(" No data stored");
display.display();
}
}
void setup() {
connectWiFi();
oledsetup();
ThingSpeak.begin(client);
neogps.begin(9600, SERIAL_8N1, GPSRX, GPSTX);
Serial.begin(9600);
display.clearDisplay();
pinMode(ledpin, OUTPUT);
pinMode(buzzerpin, OUTPUT);
}
void loop() {
gpsdata();
gasvalue = analogRead(analogpin);
valueCelcius = thermocouple.readCelsius();
ThingSpeak.setField(1, valueCelcius);
ThingSpeak.setField(2, gasvalue);
ThingSpeak.setField(3, latitude);
ThingSpeak.setField(4, longitude);
ThingSpeak.writeFields(ChannelID, ChannelAPIkey); // need to check this
Serial.print("Gas: ");
Serial.print(gasvalue);
Serial.print (" Temperature: ");
Serial.println(valueCelcius);
Serial.print(" Latitude: ");
Serial.println(latitude);
Serial.print(" || Longitude: ");
Serial.println(longitude);
// display.setTextSize(1);
// display.setTextColor(WHITE);
// display.setCursor(0, 0);
//display.println(gasvalue);
// display.display();
if(gasvalue > 20000){ //change this!
digitalWrite(ledpin, HIGH);
}
else{
digitalWrite(ledpin, LOW);
}
if(valueCelcius < 39){
display.clearDisplay();
display.setTextSize(2);
display.setTextColor(WHITE);
display.setCursor(0, 28);
display.println("NORMAL");
display.display();
digitalWrite(buzzerpin, LOW);
}
if(valueCelcius > 39 && valueCelcius < 60){
display.clearDisplay();
display.setTextSize(2);
display.setTextColor(WHITE);
display.setCursor(0, 28);
display.println("CAUTION");
display.display();
a = 0;
if(a < 100){ // check balik sini
digitalWrite(buzzerpin, HIGH);
delay(buzzerdelay);
digitalWrite(buzzerpin, LOW);
a = a+1;
}
}
if(valueCelcius > 60){
display.clearDisplay();
display.setTextSize(2);
display.setTextColor(WHITE);
display.setCursor(0, 28);
display.println("DANGER");
display.display();
digitalWrite(buzzerpin, HIGH);
}
delay(300);
}