may i know which firmware you are using

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)...

Hello, the logs you provided are enough, it is a known issue and has already get fixed two month ago. please git pull the latest code on your branch and give it a try. - fixed commit on master: https://jihulab.com/esp-mirror/espressif/esp-at/-/commit/2c99610d3859dba954f7bfa35ba5eb23f03d1314 - fixed ...

hi, from the logs you provided, it seems that PC has already received this data (data len=100), you can see this log: 1) ESP32 tcp tx: @@tcp-tx: IPL:169, S:2503821884, A:708091599, SP:52705, DP:2525, F:0x18, TDL:129 2) PC tcp rx: @@tcp-rx: IPL:40, S:708091599, A:2503822013, SP:2525, DP:52705, F:0x10...

could you please provide the full logs, includes `python build.py install ` outputs, i would like to take a look.

Hi, could you please compile the AT firmware in your PC and see what happen from AT log port (GPIO1). Use latest master branch and enable more logs to see what happened: Compile guide: https://docs.espressif.com/projects/esp-at/en/latest/esp32/Compile_and_Develop/How_to_clone_project_and_compile_it....

Hi, could you please compile the AT firmware in your PC and see what happen from AT log port (GPIO1). Use latest master branch and enable more logs to see what happened: Compile guide: https://docs.espressif.com/projects/esp-at/en/latest/esp32/Compile_and_Develop/How_to_clone_project_and_compile_it....

有使用流控么，把截图里左下角的 RTS 和 DTR 关闭试试。

good to know~

比较奇怪。你打开 debug 日志，看看发生了什么呢。
python build.py menuconfig -> Component config -> Log output -> Default log verbosity -> Info
python build.py menuconfig -> Component config -> AT -> Enable ESP-AT Debug -> Enable Network Debug