Flash AT Command Firmware to ESP01 Module (requires a USB to TTL Adapter)

By Jay Amiel Ajoc

Gensan PH

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Get it here

https://drive.google.com/open?id=0B1_HxW3KjmSFUXBp...

1. Open "esp8266_flasher.exe"

2. Load the BIN File “ai-thinker-v1.1.1.bin”. You may check this link if you want a different version : http://wiki.aprbrother.com/wiki/Firmware_For_ESP8266

3. Type in the proper COM port, if you don’t know what’s the COM Port, head over to Device Manager >> Ports (COM & LPT), it should be there. If not, then there’s something wrong with your adapter.

To fix it, click here(There’s a part there that’ll guide you on how to reinstall the driver or you can google on your own, whatever suits you)

1. Make the following connections

a. USB to TTL Tx - ESP Rx

b. USB to TTL Rx - ESP Tx

c. USB to TTL 3.3V - ESP VCC & CH_PD (ESP01 is 5V intolerant!)

d. USB to TTL GND - ESP GND & GPIO0 (Take note of this pin, it should be removed when sending AT commands later on, for now just keep it plugged)

Then click Download

1.You should have something like this. If in the end it says, “failed to leave flash mode”, don’t worry. The flashing is already done by that time.

1. After it’s done, open Arduino IDE. Select the proper COM Port in Tools >> Port

2. Before anything else, redo the connections by simply unplugging the GPIO0 (only this pin has to be removed)

a. USB to TTL Tx - ESP Rx

b. USB to TTL Rx - ESP Tx

c. USB to TTL 3.3V - ESP VCC & CH_PD

d. USB to TTL GND - ESP GND

3. Open the Serial Monitor (Both NL & CR, 115200 baud or sometimes trial and error will work, just try different combinations)

4. Type in “AT” (not case sensitive), then press Enter, it should return “Ok”

5. Done!