I have a heartbeat module in my sensor kit, and the programme and serial monitor are working finely, and it is connected GND-S, 5v to middle, A0 to - as it should, but the LED doesn't light up at all (though smaller lights on the board oscillate with the pulse when the finger is close to the module,…

Heartbeat module

system September 7, 2016, 1:35pm 2

Without a vendor link for the module and/or a schematic, nothing.

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