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Topic: UNO + GSM 2 shield no sound on audio out (Read 592 times) previous topic - next topic

fmanthon

Dear All,

My new purchased GSM V2 has the following problem:


1. SMS receive and transmit => OK


2. Make voice call:
   can makes the connection, ring tone can be heard on the cellphone but both sides are no sound.

   The Voice call program is download from this url:
   http://www.arduino.org/learning/tutorials/boards-tutorials/gsm-shield-2-voice-call-example


3. Receive a voice call:
   Incoming ring tone can be heard on my earplugs but again no sound (both sides).

   The Receive voice call program is download from this url:
   http://www.arduino.org/learning/tutorials/boards-tutorials/gsm-shield-2-receive-voice-call-example

 

I have tried two sets of mobile phone earplugs with microphone (L-R-Gnd-Mic, CTIA standard) but the problem persists. I've also tried to use the stereo speaker (L-R-Gnd) to listen but still cannot hear any sound.

Pls help.

Many thanks !!!


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