master_rx.ino

#include <ESP8266WiFi.h>
#include <WiFiClientSecure.h> 
#include <ESP8266WebServer.h>
#include <ESP8266HTTPClient.h>
#include "include.h"



/* Set these to your desired credentials. */
const char *ssid = "GL7";  //ENTER YOUR WIFI SETTINGS
const char *password = "";

//Link to read data from https://jsonplaceholder.typicode.com/comments?postId=7
//Web/Server address to read/write from 
const char *host = "trackmybus-api.herokuapp.com";
const int httpsPort = 443;  //HTTPS= 443 and HTTP = 80

//SHA1 finger print of certificate use web browser to view and copy
const char fingerprint[] PROGMEM = "D6 27 27 66 FB 8A 91 E6 31 3A B8 AF B1 79 4B 8F C7 A6 5A DC";
//=======================================================================
//                    Power on setup
//=======================================================================

void setup() {
  delay(1000);
  Serial.begin(115200);
  LoRa_init(LORA_RXEN);
  WiFi.mode(WIFI_OFF);        //Prevents reconnection issue (taking too long to connect)
  delay(1000);
  WiFi.mode(WIFI_STA);        //Only Station No AP, This line hides the viewing of ESP as wifi hotspot
  
  WiFi.begin(ssid, password);     //Connect to your WiFi router
  Serial.println("");

  Serial.print("Connecting");
  // Wait for connection
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  //If connection successful show IP address in serial monitor
  Serial.println("");
  Serial.print("Connected to ");
  Serial.println(ssid);
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());  //IP address assigned to your ESP
}

//=======================================================================
//                    Main Program Loop
//=======================================================================
void loop() {
  int i=0;
  String lat,lng;
   LoRa_Rx();
  WiFiClientSecure httpsClient;    //Declare object of class WiFiClient

  Serial.println(host);
  httpsClient.setFingerprint(fingerprint);
  httpsClient.setTimeout(15000); // 15 Seconds
  delay(1000);
  
  Serial.print("HTTPS Connecting");
  int r=0; //retry counter
  while((!httpsClient.connect(host, httpsPort)) && (r < 30)){
      delay(100);
      Serial.print(".");
      r++;
  }
  if(r==30) {
    Serial.println("Connection failed");
  }
  else {
    Serial.println("Connected to web");
  }
  
  String getData, Link;
  
  //POST Data
  Link = "/tmb/location";

  
  /*
   POST /post HTTP/1.1
   Host: postman-echo.com
   Content-Type: application/x-www-form-urlencoded
   Content-Length: 13
  
   say=Hi&to=Mom
    
   */

  
  httpsClient.print(String("POST ") + Link + " HTTP/1.1\r\n" +
               "Host: " + host + "\r\n" +
               "Content-Type: application/x-www-form-urlencoded"+ "\r\n" +
               "Content-Length: 45" + "\r\n\r\n" +
               "lat="+ str.substring(0, 8) + "&lng=" + str.substring(9,18) +  "&bus=KayamKulam Bus" + "\r\n" +
               "Connection: close\r\n\r\n");

  Serial.println("request sent");
                  
  while (httpsClient.connected()) {
    String line = httpsClient.readStringUntil('\n');
    if (line == "\r") {
      Serial.println("headers received");
      break;
    }
  }
  
  Serial.println("reply was:");
  Serial.println("==========");
  String line;
  while(httpsClient.available()){        
    line = httpsClient.readStringUntil('\n');  //Read Line by Line
    Serial.println(line); //Print response
  }
  Serial.println("==========");
  Serial.println("closing connection");
    
  delay(2000);  //POST Data at every 2 seconds
}