If you haven't seen this project, please take a look at ESP32 RFID. It seems to be a very complete project with a nice interface.

-Terry

Visiting Shenzhen Sept 12-22 and I'd like to know where to find dev kits (Espressif/M5Stack/Waveshare, etc). Which market might provide the best odds?

TIA,

-Terry

I figured it out after doing some digging. Seems the ESP32-P4 has 4 channels of LDOs. And with the Esp32 Arduino Core I'm currently on (v3.2.0), the 3rd and 4th LDOs are not initialized by default.

ESP LDO Channel State:
Index ID ref_cnt voltage_mv adjustable
0 1 1 3300 no
1 2 1 1900 no
2 -1 0 0 ...

Greetings - there's a comment in the pins_arduino.h file for the esp32p4 board that states:

// Use GPIOs 36 or lower on the P4 DevKit to avoid LDO power issues with high numbered GPIOs.

What's up with that? Is it an issue with the ESP32-P4 chip itself? Or a design issue with the Functional Eval ...

Greetings - with the ESP32-S3-WROOM-2 module, are Pads 28, 29, 30 internally connected?

TIA,

-Terry