NanoFramework on China Knockoff ESp32-WROOM boards AKA the Teyleten Robot ESP32S ESP32 ESP-WROOM-32 Development Board

 there is a knockoff of a knockoff  ESP-32-WROOM-32 DevKit board out there that is  selling at 1/3rd the price of the real ones,  but info on it is near impossible to find.   It is sold under several names but I found mine on amazon under the Teyleton Robot brand.

It has a blue led on the board at GPIO2 you can use to blink or for status, and it seems to be lacking some ram.   the laser etching on the can does not look like any of my other real ESP32-WROOM-32 and it seems to be lacking in storage.Only about 320K  and some of the pins only work in input mode and not output.  Further pointing at these are knockoffs not on just the board but also the chip.

But They do work.   the bluetooth works, the wifi works,   I have tried both standard c++ code as well as nanoframework and C#  and they work just fine.    It's a good cheap option for simpler projects.