RC7611-1 with EVK, antannas not working?

IoT Modules
1

Hi,

I’ve been trying for a few days to connect to a remote server using through TCP using an RC7611-1 module. Since i wasn’t able to achieve it on my PCB, i bought the official sierra EVK for RC76xx modules.

I tried the following manipulation with two different RC7611-1 modules, one of them being the one that was given with the EVK itself.

ati
Manufacturer: Sierra Wireless, Incorporated
Model: RC7611
Revision: SWI9X07H_00.08.20.00 d73df7 jenkins 2021/10/14 00:48:45
IMEI: 358026262056750
IMEI SV: 18
FSN: CV3095021716B1
+GCAP: +CGSM

OK

at+cpin?
+CPIN: READY

OK

at+cfun?
+CFUN: 1

OK

at+cgdcont?
+CGDCONT: 1,"IP","mmsbouygtel.com","0.0.0.0",0,0,0,0

OK

at+cgact?
+CGACT: 1,0

OK

at+cgact=1,1
+CME ERROR: no network service

at+cgatt=1
+CME ERROR: no network service

at+csq
+csq: 99,99

OK

at+creg?
+CREG: 0,0

OK

at+cgreg?
+CGREG: 0,0

OK

at+cereg?
+CEREG: 0,0

OK

at!band?
Index, Name
00, All bands

OK

at!selrat?
!SELRAT: 00, Automatic

OK

at!gstatus?
!GSTATUS:
Current Time:  552              Temperature: 27
Modem Mitigate Level: 0         ModemProc Mitigate Level: 0
Reset Counter: 1                Mode:        ONLINE
System mode:   LTE              PS state:    Not attached
IMS reg state: UNKNOWN          IMS mode:    Not Support
IMS Srv State: UNKNOWN SMS,UNKNOWN VoIP
LTE band:      No band          LTE bw:      Unknown
LTE Rx chan:    ---             LTE Tx chan:  ---
LTE CA state:  ACTIVE                   LTE Scell band:No band
LTE Scell bw:Unknown            LTE Scell chan:   42762
EMM state:     Deregistered     No Cell
RRC state:     RRC Idle

PCC RxM RSSI:  0                RSRP (dBm):  0
PCC RxD RSSI:  0                RSRP (dBm):  0
SCC RxM RSSI:  0                RSRP (dBm):  0
SCC RxD RSSI:  0                RSRP (dBm):  0
Tx Power:      --               TAC:         0000 (0)
RSRQ (dB):     0                Cell ID:     820EB030 (-2112966608)
SINR (dB):     0

OK

I was never able to have AT+CSQ return me something else than “99,99”.
However, i used the same EVK with an HL8548 module and everything was working fine (same EVK configuration, same SIM card, same antenna). I was even able to connect to the remote server through TCP using the HL8548.

Am i missing an obvious configuration step ?

2

Rc7611 is for US market
Now it is used in france network
Not sure if the band is supported

3

Thanks for the reply, it indeed looks like this might be the issue, after investigating the bands more. We’ll have to test with the appropriate modules to be certain.

4

see if you can use this variant

5

Yes we chosed this one too after your feedback, thanks for confirming it is the right choice.
I’ll mark this post as solved and reopen one later if i encounter more trouble.

Thanks again jyijyi.