I tried to communicate with the SARA modem on the SARA SFF but couldn’t get it to run with my RIOT based application on the SAMD21. I tried to use the Arduino passthrough sketch instead, but the serial monitor is not giving me any responses from the modem at all. So I finally tried the Universal Tracker sketch but for the “SV” command, for example, I only get
11:36:42.019 -> Enter command: SV
11:36:43.561 -> Initializing modem…
11:36:49.795 -> Modem initialized.
11:36:49.795 -> Modem version:
11:36:49.795 -> Please note that the modem is now initialized.
11:36:49.795 -> *** If you need to change the type of network please reboot first.
11:36:49.830 -> Commands:
11:36:49.830 -> Show IMEI (SI):
11:36:49.830 -> Show CCID (SC):
11:36:49.830 -> Show Module version (SV):
11:36:49.830 -> Commit Settings (CS):
Please also note the long delay during modem initialization. Do I have a hardware issue or do I miss anything?