@james_ma Sure. If you’ve just started messing with Arduino, then you’ll probably be better working with existing microphone breakouts, such as the SPH0645LM4H, along with a suitable Arduino or ESP-32 development board (I couldn’t get this to work with the XIAO). I made sure my code worked on those first. However, if you wanted to make your own custom board too, then these are the schematics for my current version.
For size reasons, I am currently using the smaller TTGO Micro32 module, but I would generally recommend the more commonly available ESP-WROOM-32 instead (same pins). There’s USB input for power and data, a USB serial to UART chip for programming, dual transistors for putting the ESP into flashing mode and the MEMS microphone module.
