Wiring diagram - Pins

• ESP8266 Wifi Serial Module
• Arduino Uno
• Jumper cable

• We need to make minor adjustments in the Arduino IDE program.

1. Open the IDE then File > Preferences
2. Type "https://arduino.esp8266.com/stable/package_esp8266com_index.json" in the Additional Boards Manager URLs section.

• Tools > Board > Board Manager...
• Type esp8266 and download the resulting dashboard.
• Then select Tools > Motherboard > esp8266 > Generic ESP8266 Module again.

There should not be any software inside the Arduino Uno board. You must upload a blank code to the card;

• File > New Sketch
• Code you need to install.

1. Power the Uno board.
2. Unplug the 3.3v cable of the Esp module and plug it back in.The board is now in software installation mode!
3. Start uploading your code.
4. Once installed, unplug the GPIO-0 pin.
5. Disconnect and reconnect the 3.3v cable of the Esp module.