ESP32 Forum

Hello,

ESP-WROOM-32 does not respond for AT command even though ESP-AT has been built and flashed.

I've tried to flash AT firmware into the Kit.

But it does not respond to AT command via UART as well.

Is there any other thing is needed to activate ESP-AT for using this?

Please help here to use ESP-AT.

Thanks in advance.

It appears that the UART transmission from the ESP32 to the MCU is functioning well, but the transmission from the MCU to the ESP32 is not. Could you please check the following two items?
1. AT+GMR commands end with a new-line (CR-LF). (it should be two bytes, 0x0D 0x0A in ASCII, `\r\n` in MCU code)
2. Check your hardware connection according to https://docs.espressif.com/projects/esp ... -32-series

Thanks a lot!!

It works by adding CR(\n) to end of AT command on Terminal side.