Update frequency of the signal quality

[NelsonGoncalves]

Hello,

In our product, the nRF9160 is configured to use LTE CAT-M1 and we are measuring the signal quality thorugh the AT+CESQ command.

After begin registered on the network, we query the signal status. But always get "Not known" for all fields:

AT+CESQ
+CESQ: 99,99,255,255,255,255

This is the output of the AT command AT+CEREG:

AT+CEREG?
+CEREG: 0,5,"42CC","01032208",7
OK

I find it strange that the modem is registered, but there are no signal quality measurements. We check the signal quality once every 10 seconds for about 3 minutes. And the AT command always returns the same response. Are they available only after a certain period, e.g. 10 minutes are power up ? 

[Øyvind]

Hello, 

What SIM card are you using in your device? And can you please provide a location? What application are you running on your device? Is this s custom board or a development kit?

What version of the modem FW are you currently running? Please issue the AT%SHORTSWVER command. 

From the LTE Link Monitor, can you please provide a full output when calling "AT+CFUN?". 

Thank you.

Kind regards,
Øyvind

[NelsonGoncalves]

Hello Orvid,

Sorry for the delay, I missed the notification that you had replied. 

What SIM card are you using in your device? And can you please provide a location? 

I am still using the iBasis SIM card that came with the DK board. I am based in Brussels, Belgium.

What application are you running on your device? Is this s custom board or a development kit?

The application running on the device is our own, and for the moment we are using the  development kit.

What version of the modem FW are you currently running?

AT%SHORTSWVER

%SHORTSWVER: nrf9160_1.2.3

OK

From the LTE Link Monitor, can you please provide a full output when calling "AT+CFUN?". 

AT+CFUN?

+CFUN: 1

OK

AT+CGSN=1

+CGSN: "352656108600407"

OK

AT+CGMI

Nordic Semiconductor ASA

OK

AT+CGMM

nRF9160-SICA

OK

AT+CGMR

mfw_nrf9160_1.2.3

OK

AT+CEMODE?

+CEMODE: 2

OK

AT%XCBAND=?

%XCBAND: (1,2,3,4,5,8,12,13,18,19,20,25,26,28,66)

OK

AT+CMEE?

+CMEE: 1

OK

AT+CNEC?

+CNEC: 24

OK

AT+CGEREP?

+CGEREP: 1,0

OK

AT+CIND=1,1,1

OK

AT+CEREG=5

OK

AT+CEREG?

+CEREG: 5,5,"42CC","01031D08",7,,,"11100000","11100000"

OK

AT+COPS=3,2

OK

AT+COPS?

+COPS: 0,2,"20610",7

OK

AT%XCBAND

%XCBAND: 20

OK

AT+CGDCONT?

+CGDCONT: 0,"IP","ibasis.iot","10.160.118.158",0,0

OK

AT+CGACT?

+CGACT: 0,1

OK

AT%CESQ=1

OK

AT+CESQ

+CESQ: 99,99,255,255,19,45

OK

AT%XSIM=1

OK

AT%XSIM?

%XSIM: 1

OK

AT+CPIN?

+CPIN: READY

OK

AT+CPINR="SIM PIN"

+CPINR: "SIM PIN",3

OK

AT+CIMI

204080813633493

OK

%CESQ: 47,2,22,3

%CESQ: 46,2,17,2

%CESQ: 47,2,22,3

%CESQ: 46,2,17,2


I don't know why, but now it works as well in my application.

[kobyatom]

what has worked for you, NelsonGoncalves, is the unsolicited response activated by 

AT%CESQ=1

it responds with 

%CESQ: 46,2,17,2

It seems that the solicited response doesn't output the same information as the unsolicited one.

It seems like a bug to me (I have worked with Telit modems, and did not see this happen there).

[kobyatom]

sorry, my bad. the documentation for the AT+CESQ defines the response, and the modem's response matches the documentation.