ESP8266 Community Forum

Posted: **Sat Apr 22, 2017 12:01 am**

Hi all.
I have "arduino Mega2560" and "esp8266 lolin nodemcu v3" and I've connected:
esp -> arduino
3v -> 3.3v
G -> Gnd
Tx -> digital port 2
Rx -> digital port 3
https://www.photobox.co.uk/my/photo/ful ... 1663183097
And below u can see the code that I've uploaded on arduino:

Code: Select all

#include <SoftwareSerial.h>
SoftwareSerial esp8266(2,3);

void setup()
{
  Serial.begin(115200);
  esp8266.begin(115200);
}

void loop()
{delay(1000);
 esp8266.println("AT");
 if(esp8266.available()) // check if the esp is sending a message 
 {Serial.print("lool");
 while(esp8266.available())
  {
    // The esp has data so display its output to the serial window 
    char c = esp8266.read(); // read the next character.
    Serial.write(c);
  }  
 }
}

But I can't see anything in serial monitor of arduino.
Whats the problem?!
Any help appreciated.

Posted: **Mon Apr 24, 2017 9:42 am**

You are trying to check if response came with esp8266.available() and expecting the response to be already present. You either need to add a delay after sending the AT, or even better add a while() loop with timeout check that will wait the response been received.

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