Domain: technology (Hardware Troubleshooting and Maintenance)
Problem: I am planning to add a digital microphone interface to this board without desoldering the main module, but I first need a reliable way to identify which ESP32 pins are connected to these specific pads. Since visual inspection is insufficient to determine their functions, I need a logical methodology to map these pads back to the module to verify if they support I2S signals for audio. Given that I have a multimeter and access to the official module datasheet, what is the most effective path to confirm these hardware connections without damaging the device?
Answer: Consult the module datasheet for the pinout and use a multimeter in continuity mode to trace the physical pads back to their respective module pins.