Serial Communication from Arduino nano to ESP8266

Projects Networking, Protocols, and Devices
5

Hey, very nice sketch, thanks! Please, could you post a photo or a scheme of connection? I have the same setup and i can't make it work(

GolamMostafa:
My NANO (Sender) and ESP8266 (Receiver) are exchanging data very well using SUART Ports: (3, 4) and (D3, D4). The connections are direct as the ESP pins are practically 5V tolerant.

NANO Codes:

#include<SoftwareSerial.h>

SoftwareSerial SUART(3, 4); //SRX = DPin-3, STX = DPin-4
void setup()
{
  Serial.begin(9600);
  SUART.begin(9600);
  Serial.print(" ");
}

void loop()
{
  SUART.print('A');
  byte n = SUART.available();
  if (n != 0)
  {
    char x = SUART.read();
    Serial.println(x);
  }
  delay(1000);
}




**ESP8266 codes:**

#include<SoftwareSerial.h>
SoftwareSerial SUART(D3, D4); //SRX = D3, STX = D4

void setup()
{
  Serial.begin(115200);
  SUART.begin(9600);
}

void loop()
{
  SUART.print('B');
  byte n = SUART.available();
  if (n != 0)
  {
    char x = SUART.read();
    Serial.println(x);
  }
  delay(1000);
}




**Screen shot: NANO**
![smNANO.png|607x433](upload://5egNoy4cHFd0KsgX2EpXAnKgShW.png)

**Screen shot: ESP8266**
![smesp1.png|607x441](upload://98dQcj1Wo8rUnLR0w3KFoXwyDPX.png)