Need help getting audio in and out of SIM900

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1

Hello,

I can call/receive call but have no sound. I found commands like AT+QAUDCH=1 to switch channels, AT+CHFA etc, etc but shield always returns ERROR;

Many commands work and many don’t. Yesterday when I plugged the earphones for the first time, I could hear the tone when receiving a call with without any commands.

shield is SIMCOM SIM900 Shield with the pink and green audio inputs.

Regards :slight_smile:

2

Hi,

You don’t need any specific command for turning ON and OFF the audio IN and Out. What output speaker are you using with SIM900?