ESP32 Forum

I am new to esp32.
I would like to use ESP32 WROOM together with TM4C129 microcontroller in my new project and I need AT commands to communicate with ESP32.
I have used flash_download_tools_v3.6.6.exe to download AT Firmware into ESP32 Flash as this is decribed in esp32_at_instruction_set_and_examples_en.pdf - #1.2
using default debug UART0 connected to the PC via UART to RS232 converter.
I have used two buttons connecter to EN and IO0 to enter in bootloadin mode.
After finish of downloading and restarting I receive "Ready" on UART1 ( default AT commands UART) and I receive echo on the commands I sent ( each command ends with CR-LF), but I not receive "OK" and commands are not executed at all.

Where I have to read about this issue?

Thank you in advance!

"ready" and the command echo should mean that the AT firmware works fine. Did you send the AT command via UART1? If so, I guess the problem may be on the new line "CR-LF", maybe you can try with another serial tool.

Thank you very much Helen L !
The problem was in the PC terminal I have used.
When I send commands from my microcontroller ( for example "AT+RST\r\n") I receive response from the ESP32.
Thank you again!

Hi All,

Did you mean to say 'UART2' for the AT commands? (ie GPIO 16/17)?

The datasheet for ESP32-WROOM says that UART1 is for integrated SPI Flash?

I just received a few ESP32-WROOM-32Ds, and am trying to get the AT working as well... but I was trying against the stock flash it came with, does anyone know what flash they are loaded with? is it something else, not AT?


Thanks,

- Mike