EC200U -CN OPEN CPU VOICE CALL TTD Noise Issue

Technical Subjects Software General Function
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1

HI
We are using Quectel EC200U-CN module with OpenCPU SDK voice_call_demo_task() , and when we test the product in very low signal strength area, we get TTD noise along with mic input. But when we use the AT firmware, this issue does not occur.

kindly do needful, since to have a low cost solution, we need to use open CPU firmware., for some urgent deliveries.

Thanks & regard
RAJU

2

Hi,
You can check whether the PA is normal and check other hardware.
Thanks