Flash Firmware on ESP8266 (ESP-01) Module

Introduction:

The ESP8266 ESP-01 is a Wi-Fi module that allows microcontrollers access to a Wi-Fi network. This module is a self-contained SOC (System On a Chip) that doesn’t necessarily need a microcontroller to manipulate inputs and outputs as you would normally do with an Arduino, for example, because the ESP-01 acts as a small computer. Depending on the version of the ESP8266, it is possible to have up to 9 GPIOs (General Purpose Input Output). Thus, we can give a microcontroller internet access like the Wi-Fi shield does to the Arduino, or we can simply program the ESP8266 to not only have access to a Wi-Fi network, but to act as a microcontroller as well. This makes the ESP8266 very versatile, and it can save you some money and space in your projects.

Step-by-Step Process:

Step 1:

Take your Arduino Uno board and remove your ATmega328P microcontroller from the board carefully with the help of tweezers.

Step 2:

Do connection with your Arduino Uno board:

ESP8266:-------------- >Arduino:

GND -------------------------- GND

GP2 -------------------------- Not connected (open)

GP0 -------------------------- GND

RXD -------------------------- RX

TXD -------------------------- TX

CHPD ------------------------ 3.3V

RST -------------------------- Not connected (open)

VCC -------------------------- 3.3V

Step 3:

Download the firmware (click here) and ESP8266 flasher from the attachment.

Step 4:

Connect your Arduino board with your PC/laptop then go to control panel and check for COM port.

Choose your COM port carefully.

Step 5:

Browse for your firmware.bin file which you downloaded from the link.

Step 6:

Click on the download button.

Step 7:

It will stop at 99% then remove the cable from the PC/laptop and you are done.

Step 8:

Circutary for reset.

Possible Errors:

• GPIO0 is not grounded
• Loose connections
• COM port is not correct