I have follow your step , but the result still failed.
I have set at!avcfg ,at!avsetprofile and at!avpifacepref, but still can’t get PCM signal.
If I select internal codec, the signal is correct, so I think the HW is working well.
Do you have any suggestion?
Manufacturer: Sierra Wireless, Incorporated
Revision: SWI9X07Y_02.25.02.01 000000 jenkins 2019/01/30 08:13:05
IMEI SV: 6