ESP32-S2 module custom programming

[roshan.r]

Hi,
We are developing a application with ESP32-S2 where I have to program the ESP32-S2 custom chip. May I know the best way to program the chip and let me know the procedure. kindly, do the needful.

Thanks & Regards,
Roshan.

[ESP_Sprite]

Your post doesn't make much sense. Are you asking how to program the flash in an ESP32 module? You do that using the IO0, EN, TX and RX pins; see for instance the schematic of a devkit if you need a hardware example. On the software side you can use e.g. esptool.

[Miraculix]

What custom chip?

[roshan.r]

I mean i have to flash the program into ESP32-S2 using USB to UART TTL. please, help me on this and also i want to know the boot button pin number in ESP32-S2 module. kindly, do the needful guys. thanks in advance.

[ESP_Sprite]

There is enough information out there in datasheets and schematics. What specifically do you have problems with?

[roshan.r]

Actually, I am getting the below error when I am trying to program using USB to UART TTL.

Serial port COM13
Connecting........_____....._____....._____....._____....._____....._____....._____

A fatal error occurred: Failed to connect to ESP32-S2: Timed out waiting for packet header
CMake Error at run_cmd.cmake:14 (message):
esptool.py failed
Call Stack (most recent call first):
run_esptool.cmake:21 (include)


FAILED: CMakeFiles/flash
cmd.exe /C "cd /D C:\Users\rosv2c17090\Desktop\esp-idf-v4.2\components\esptool_py && C:\Users\rosv2c17090\.espressif\tools\cmake\3.16.4\bin\cmake.exe -D IDF_PATH="C:/Users/rosv2c17090/Desktop/esp-idf-v4.2" -D ESPTOOLPY="C:\Users\rosv2c17090\.espressif\python_env\idf4.2_py3.7_env\Scripts\python.exe C:/Users/rosv2c17090/Desktop/esp-idf-v4.2/components/esptool_py/esptool/esptool.py --chip esp32s2" -D ESPTOOL_ARGS="--before=default_reset --after=hard_reset write_flash @flash_args" -D WORKING_DIRECTORY="C:/Users/rosv2c17090/Desktop/venkat_installation/veetech_wifi_develop-2.0/build" -P C:/Users/rosv2c17090/Desktop/esp-idf-v4.2/components/esptool_py/run_esptool.cmake"
ninja: build stopped: subcommand failed.
Executing action: flash

[ESP_Sprite]

That could be anything between the USB-to-serial chip and the ESP32, I'm afraid. Do you have a schematic of your current setup?

[roshan.r]

Hi,
Find the attached file of schematic view. please, ignore the imperfection.

[mgsecord62]

How much current can the USB to Serial device supply to the ESP32-S2 module? Many of the inexpensive USB to Serial devices can only supply ~50mA which is not enough for the ESP32-S2 module. Also I have purchased USB to Serial devices that had the RX and TX pins reverse labeled. Have you tried swapping the RX and TX connections?

[ESP_Sprite]

Also, what specifically is that block labeled 'ESP32-S2'? The chip? A module (if so, which)? A devboard (if so, which)?