Arduino – How to communicate to ESP8266 (ESP-01) using SofwareSerial

This ESP-01, has been upgraded to AT firmware v1.1, using this firmware here.

We need to first connect the ESP-01 to the Arduino using this schematics below.

Code : Pastebin.

If you open serial monitor, you now can send AT command from it.

If you want to send serial command from your program to ESP directly, use mySerial.write(Serial.read()); .