"ESP32-C3-WROOM-02" module no response to AT commands

[nataut]

Hi all

I'm working on a project that use the "ESP32-C3-WROOM-02" module. I followed the "ESP-AT User Guide" (downloaded from ESPRESSIF web site) but I can't communicate with AT commands (the module doesn't answer).

If I well understand, there is no specific firmware for "ESP32-C3-WROOM-02" module but is possible to use the one for "ESP32-C3-MINI-1" module, is this correct?

I programmed the "ESP32-C3-WROOM-02" using the "ESP32-C3-MINI-1" firmware but I don't get any response when I send the AT commands.

On the "ESP32-C3-WROOM-02" module is mounted the "ESP32-C3" device, correct? Are GPIO6 (RX) and GPIO7 (TX) the pins to send AT commands to "ESP32-C3" device?

Many thanks

[bidrohini]

Are you using any serial port terminal app or sending AT commands using Arduino IDE?

[nataut]

I used several serial port terminal apps but not Arduino IDE.
Based on the "ESP-AT User Guide", the default UART1 configuration should be

115200 bps
1 stop bit
none Parity
RTS and CTS, both enabled

is it right?

ESP32-C3-WROOM-02 module is mounted on a my customized hardware that doesn't manage the RTS and CTS control signals, so I shorted to GND the CTS pin of the ESP32-C3 device. Even with this trick, I don't get any response

[esp-at]

Here is the hardware connection layout, could you please take a look.
https://docs.espressif.com/projects/esp ... ction.html

if the issue still exists, please provide the logs of UART0 and UART1, and the hardware connection layout of yours, and the steps you did.
thanks.

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