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Topic: Connecting speaker and mic to gsm shield (Read 1 time) previous topic - next topic

chris_van_roey

I've connected a speaker to the gsm shield with the SparkFun amplifier board.
Works fine (although volume is still weak). But it is ok.

Next step was to connect a electret microphone to the board (M1P and M1N).
This does not work.
I suppose I need some extra hardware here.
The gsm shield doc mentions some hardware  (3.9.3. Earphone interface connection) but this is for me not clear at all.

Can someone explain me what I need to connect a mic to the gsm shield.
Objective is to be able to make voice calls.

Thx,
Chris

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