Panasonic cf-20 em7305 gps problem on ubuntu

[jyijyi]

Ttyusb3 is for AT command only

Do you mean you need nmea frame?
You might need to see other port after sending gps_start:

EM7355 - cannot get NMEA working

I haven’t tried this on anything newer than an MC7710, but there you have to use the “well known” Qualcomm trick to start NMEA: echo "\$GPS_START" > /dev/ttyUSB1 # use GPS echo "\$GPS_STOP" > /dev/ttyUSB1 ref thinkwiki.org/wiki/Qualcomm_Gobi_2000