I am trying to check the devices work or not. When I tap first device, the first device’s VCC right on MOSFET module turns on, but I can't see anything from second device or both devices of solenoid.
Is this a worthwhile discussion?
It’s worth checking if both of your devices are successfully paired and connected to the internet. You can do that by tapping the BOOT button on the ESP32 module, and checking if the blue light flashes on the other ESP32 module, and vice versa. If that’s all working, double check your wiring, particularly the piezo sensor part. Hope that helps!
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