stty -F /dev/ttymxc3 1000000
gst-launch-1.0 filesrc location=/dev/ttymxc3 ! rawaudioparse format=pcm pcm-format=s16le sample-rate=16000 num-channels=1 ! audioconvert !  audioresample !  "audio/x-raw,rate=16000" ! wavenc ! filesink location=test.wav