I’ve been using my hologram SIM card for a while now and have no connectivity issues. Today I needed to conduct some tests on my Arduino MKR1500 NB and when I went to do a GRPS connectivity test I got this in the debug output:
Connecting NB IoT / LTE Cat M1 network…AT
OK
AT+CMEE=0
OK
AT+CFUN=0
OK
AT+CPIN?
+CPIN: READY
AT+CTZU=1
OK
AT+CGDCONT=1,“IP”,“”
OK
AT+UAUTHREQ=1,0
OK
AT+CFUN=1
OK
AT+CEREG?
+CEREG: 0,3
From my understanding, the “+CEREG: 0,3” generally indicates that the device is not registered and is searching for a network.
I’m located in the Puerto Rico Area and we experienced a lot of power outages so I wanted to ask if there was a way of checking local tower connectivity.