Read data sent by arduino in ESP8266

Projects Programming
1

hi everyone

i am new to this forum.....

i am having problem in reading data sent by arduino to esp8266..

can anyone guide me on this plz

thank you.

2

Yes of course. Start by looking at How to use the forum. That will tell you exactly what and how you need to post in order for us to help :slight_smile:

3

i am having problem in reading data sent by arduino to esp8266..

Where is the data coming from ?
Where do you want to see it ?

4

Where is the data coming from ?

atmega328p will send '1' on the serial monitor..

Where do you want to see it ?

in ESP8266.

5

OK. Let's see your programs for both ends of the link and details of how the 2 systems are connected and powered.

6

first of all i am using RobotDyn uno wifi board where ESP8266 is in build.

so communication between atmega and esp8266 will heppen when i toggle the switches 1 and 2 on.

esp8266 code

#include <Arduino.h>

#include <ESP8266WiFi.h>
#include <ESP8266WiFiMulti.h>

#include <ArduinoJson.h>

#include <ESP8266HTTPClient.h>

#define USE_SERIAL Serial

ESP8266WiFiMulti WiFiMulti;
int i=0;
const size_t bufferSize = JSON_OBJECT_SIZE(2) + JSON_OBJECT_SIZE(3) + JSON_OBJECT_SIZE(5) + JSON_OBJECT_SIZE(8) + 370;
DynamicJsonBuffer jsonBuffer(bufferSize);
void setup() 
{
    USE_SERIAL.begin(9600);
    //USE_SERIAL.setDebugOutput(true);
    //USE_SERIAL.println();
    //USE_SERIAL.println();
    //USE_SERIAL.println();
    for(uint8_t t = 4; t > 0; t--) 
    {
        //USE_SERIAL.printf("[SETUP] WAIT %d...\n", t);
        //USE_SERIAL.flush();
        delay(1000);
    }

  WiFi.begin("DIGISOL","edot2018");
 
  while (WiFi.status() != WL_CONNECTED) 
  {
    delay(500);
    //Serial.print(".");
  }

  //Serial.println("");
  //Serial.println("WiFi connected"); 
  //Serial.println("IP address: ");
  //Serial.println(WiFi.localIP());
}

void loop() 
{ 
  // wait for WiFi connection
  // if((WiFiMulti.run() == WL_CONNECTED)) {
    while(Serial.available() == 0){}
    int command = Serial.parseInt();
    if(command == 1){
    HTTPClient http,http2;

    //USE_SERIAL.print("[HTTP] begin...\n");
    // configure traged server and url
    http.begin("http://192.168.1.12/FlightStats/api/Flight/GetArrivingFlightsStatus/"); //HTTP
    http2.begin("http://192.168.1.12/FlightStats/api/Flight/GetDepartingFlightsStatus/");
    //start connection and send HTTP header
    int httpCode = http.GET();
    int httpCode2 = http2.GET();

    // httpCode will be negative on error
    if(httpCode == 200 ) 
    {
        // HTTP header has been send and Server response header has been handled
        //USE_SERIAL.printf("[HTTP] GET... code: %d\n", httpCode);
        //USE_SERIAL.printf("[HTTP] GET... code: %d\n", httpCode2);
        String myString = http.getString();
        String myString2 = http2.getString();
        JsonObject& root = jsonBuffer.parseObject(myString);
        const String description = root["Description"];
        JsonObject& root1 = jsonBuffer.parseObject(myString2);
        const String description2 = root1["Description"];
        USE_SERIAL.println(description);
        USE_SERIAL.println(description2);
         
    } 
    else 
    {
        USE_SERIAL.printf("[HTTP] GET... failed, error: %s\n", http.errorToString(httpCode).c_str());
    }

    http.end();
    delay(10000);
    }
}

atmega code

void setup() {
	 
	 Serial.begin(9600);
	 
}

void loop() { 
   
   Serial.println('1');
   if(Serial.available() > 0) 
   {
    ATSTART();
    draw();
   }
   else if (cycled == 1)
   {
    count=0;
    draw();
   }
   else
   {
    ATSTART();
    draw();
   }
   delay(1000);   
   
}

i am able to send data from ESP8266 to atmega using serial monitor , but m not able to the other way round.