take that metallic shield off, to expose the module's pin out, go for sim800L's datasheet to trace for spk+/spk- and mic+/mic-
you better be good at soldering to tap the wires out of those pins, don't forget the caps
take that metallic shield off, to expose the module's pin out, go for sim800L's datasheet to trace for spk+/spk- and mic+/mic-
you better be good at soldering to tap the wires out of those pins, don't forget the caps