Thank you very much Abdulwahid,
as I have suceessfully made the 2 steps you said for my OpenWRT OS, according to this log :
root@Cell_Router:~# printf “AT!BOOTHOLD\r\n” > /dev/ttyUSB2
–> I have got the good reply “AT!BOOTHOLD” on the ttyUSB2 port.
root@Cell_Router:/home/swi-update# ./a.out --serial /dev/ttyUSB2 ./MC73xx_GPS_Rollover_2019_NVU.nvu
Got QDL version: 4
Downloading CWE image ‘./MC73xx_GPS_Rollover_2019_NVU.nvu’
CWE revision: 3
image size: 2228
Waiting for ack
Terminating session - rebooting modem…
Then modem has well rebooted : I have recovered the 4G, Longitude, Latitude and Altitude, they are still OK.
But the original problem of GPRMC date is still here, nothing changed, as today I am still on the 07/04/2000:
I have tried on 2 samples of MC7304 , and the result is the same. I tried yesterday and today.
Anybody knows what’s wrong ?
PS : before this month November 2019, the GPRMC date was working well, and was according to Wikipedia :
For example last month in october 2019 I got the good datagram for october 13rd:
And below is detail of the full datagram of today, with the GPRMC date issue remaining:
root@Cell_Router:/dev# cat < /dev/ttyUSB1