Manufacturer: Sierra Wireless, Incorporated
Revision: SWI9X50C_01.14.03.00 b06bd3 jenkins 2020/09/23 10:53:35
IMEI SV: 13
Sending following commands:
AT!GPSNMEASENTENCE=1F (GPS sentences only)
I’m not seeing NMEA sentences coming out of ttyUSB1 interface (115200 8N1)
Additionally sending $GPS_START on the GPS tty interface also does not start NMEA sentences.
The above sequence works flawlessly on EM7565.
The AT documentation for EM7421 GPS is identical as for the EM7565 model.
So it looks like it’s simply broken in firmware …
There is also no newer firmware available for EM7421 currently …