EM7590 / Sierra Wireless AirPrime Dev Kit –

The modem works on both interfaces (AT and QMI) and I can see the respective SIM cards I’ve tried (I can read the phonebook, see the IMSI etc).

However the modem can’t seem to see the network nor GPS satellites.

AT+CSQ reports no signal (99,99)

I’ve checked the switch settings on the dev kit and they seem to be correct. I’ve got it powered with the barrel jack and am using the USB interface. I’ve plugged in all antennas, but think I’d expect some signal with only MAIN and GNSS (for the GPS) plugged in? I’ve tried with two different SIMs (one from my mobile phone which I’m sure is working).

AT+ICCID returns
ICCID: 8944200122752044… (omitted the last 3 digits)

AT+COPS?
+COPS:0

All the responses in LTEINFO are ‘—‘

I turned on AUTO-SIM but this has made no difference.

other AT command/responses:

at!gstatus?
!GSTATUS:
Current Time: 3259 Temperature: 27
Reset Counter: 1 Mode: POWEROFF

at+cpbs?
+CPBS: “SM”,3,250

ati
Manufacturer: Sierra Wireless, Incorporated
Model: EM7590
Revision: SWIX12C_01.01.05.00 2022/08/17 01:45:55
SVN: 01
IMEI: 357999720007113
FSN: DX2414001101G1
+GCAP: +CGSM

at!impref
OK
!IMPREF:
preferred fw version: 00.00.00.00
preferred carrier name: AUTO-SIM
preferred config name: AUTO-SIM_000.000_000
preferred subpri index: 000
current fw version: 01.01.05.00
current carrier name: GENERIC
current config name: GENERIC_001.001_000
current subpri index: 000

at!lteinfo?
!LTEINFO:
Serving EARFCN MCC MNC TAC CID Bd D U SNR PCI RSRQ RSRP RSSI RXLV
IntraFreq: PCI RSRQ RSRP RSSI RXLV
InterFreq: EARFCN ThresholdLow ThresholdHi Priority PCI RSRQ RSRP RSSI RXLV
– – – – – – – – –
WCDMA: UARFCN ThreshL ThreshH Prio PSC RSCP ECN0 RXLV
– – – – – – – –

OK

at+cops?
+COPS: 0

Any advice would be appreciated!

Thanks,
Stuart

The firmware is quite old, you can upgrade the firmware

Btw, what are the return of the following?

At!pcinfo?
At+cfun?

Updating the firmware and reseating the micro-coax cables resolved the issue