nRF9160 fails to attach after several RESETs & attach without power cycle

[Michal Mühlpachr]

Hi,

nRF9160 with SLM NCS v1.9.1 fails to attach after 7th RESET (by RESET pin) & attach without power cycle.

There is not any ERROR state reported by modem, modem fails to attach forever without power cycle.

After nRF9160 power cycle it attaches immediately with same AT sequence.

We need reliable initialization of nRF9160 SLM/Modem without nRF9160 power cycle because we do not have load power in production HW - issue threatens device stability in the field.

I prepared Python script to reproduce issue with nRF9160DK, you can find it together with log at https://gist.github.com/muhlpachr/40a4d8f1b332aee8a25fa7e1ad023751
Modify COM port for AT commands according your PC setup please.

Issue is 100% reproducible.

Attached you can find modem trace.

Thank you.

Regards,
Michal

trace-2022-03-24T23-42-16.760Z.bin

[Michal Mühlpachr]

Hello Øyvind,

I prepared simple Python script to demonstrate both issues (120+ delay does not work, 35+m delay does not work).

Python script and its AT dialogue log is published here https://gist.github.com/muhlpachr/fc6fbafa392cc1dd384437e797ebfc3a

Collected trace from that run:

trace-2022-04-06T12-31-45.838Z.bin

Feel free to keep ticket public.

Let me know what can I do more to help troubleshoot both issues.

Regards,
Michal

[Øyvind]

Thanks for providing this. I will need some time to reproduce this, as next week is Easter Holiday our tech support team will be shorter staffed.

Sorry for the inconvenience. 

Kind regards,
Øyvind

[Michal Mühlpachr]

OK, thank you, let me know in case you need an additional info please.
Do not forget to set SW9 VDD IO switch on nRF9160DK to 3V position.

Kind regards,
Michal

[Øyvind]

Hi Michal, 

I've finally got hold of an FTDI cable FT232RQ. This is not something our tech support team uses that much. Could you please elaborate more on how I should connect this in regards to your script. 

# There is USB-to-UART bridge in addition to nRF9160DK to control RESET and WAKEUP pins of nRF9160
# e.g. CP2102, CP2104, CP2102N, FT230X, FT231X, FT232X
# nRF9160 SB16 shorted to bring RESET button to connector P1 on nRF9160DK
# P1 RESET wired to control_uart TXD
# P3 P0.06 wired to control_uart DTR

What is the reason for shorting ? And what is DTR?

Thanks.

-Øyvind

[Michal Mühlpachr]

Hi Øyvind,

Make sure you have FTDI cable with 3V levels (not 5V) and that SW9 VDD IO is set to 3V (not default 1,8V).

DTR is https://en.wikipedia.org/wiki/Data_Terminal_Ready 
DTR and RTS can be used as general purpose outputs on DCE , have a look e.g. at UART https://stackoverflow.com/questions/957337/what-is-the-difference-between-dtr-dsr-and-rts-cts-flow-control

You can use RTS instead of DTR, in such case instead of control_uart.dtr use control_uart.rts in script.

Lines 132, 134 and 179

Documentation for pyserial is at https://pyserial.readthedocs.io/en/latest/pyserial_api.html#serial.Serial.rts

USB-to-UART bridge is used just as tool to control two general purpose outputs from script in PC (so it not used as UART).
nRF9160DK do not have such capability AFAIK.

TXD is used to control RESET of nRF9160 (by sending BREAK to UART - it creates pulse on TXD).
DTR (or RTS in your case) is used to control WAKEUP PIN of nRF9160.

Reason for remote control of RESET pin and WAKEUP pin is automation of scenarios, otherwise you would need to push buttons by hand in defined moments - it is not joy ;-)

In addition by automating RESET and WAKEUP signals we have more precise timing and less human errors (100% repeatability).

Regards,

Michal

[Øyvind]

Hi Michal, 

Thanks for clarifying. 

My initial test with your script gave me error due to it waiting for CEREG: 5. I then modified some of the values to fit my network. It gets further, however, it fails with same error.

C:\Temp\Support\286487>python nrf9160_slm_at_dialogue.py
Power cycle nRF9160DK, press Enter
========== CYCLE: 1 ========== Wed May  4 20:43:24 2022
  0.31  0.00 <RESET by pin>
  1.43  1.12 <WAKEUP by pin>
  2.22  1.91      Ready
  2.23  1.93 AT
  2.26  1.96      OK
  2.28  1.97 AT%XMODEMTRACE=1,2
  2.31  2.00      OK
  2.33  2.02 AT%MDMEV=1
  2.36  2.05      OK
  2.37  2.06 AT%HWVERSION
  2.40  2.10      %HWVERSION: nRF9160 SICA B1A
  2.42  2.11      OK
  2.44  2.13 AT%SHORTSWVER
  2.47  2.16      %SHORTSWVER: nrf9160_1.3.1
  2.48  2.17      OK
  2.50  2.19 AT%XPOFWARN=1,30
  2.54  2.24      OK
  2.56  2.25 AT%XSYSTEMMODE=1,0,0,1
  2.61  2.30      OK
  2.62  2.31 AT%REL14FEAT=1,1,1,1,0
  2.65  2.34      OK
  2.67  2.36 AT%RAI=1
  2.70  2.39      OK
  2.71  2.40 AT%XDATAPRFL=0
  2.74  2.44      OK
  2.76  2.45 AT%XSIM=1
  2.79  2.48      OK
  2.81  2.50 AT%XNETTIME=1
  2.84  2.53      OK
  2.85  2.54 AT+CEREG=5
  2.88  2.58      OK
  2.90  2.59 AT+CGEREP=1
  2.93  2.62      OK
  2.95  2.64 AT+CSCON=1
  2.98  2.67      OK
  2.99  2.69 AT+CPSMS=1,"","","00111000","00000000"
  3.04  2.73      OK
  3.06  2.75 AT+CNEC=24
  3.09  2.78      OK
  3.10  2.79 AT+CMEE=1
  3.13  2.82      OK
  3.15  2.84 AT+CEPPI=1
  3.18  2.87      OK
  3.20  2.89 AT#XSLEEP=2
  3.23  2.92      OK
  4.36  4.05 <WAKEUP by pin>
  4.47  4.16      Ready
  4.48  4.18 AT%XMODEMTRACE=1,2
  4.51  4.21      OK
  4.53  4.22 AT%XBANDLOCK=1,"0000000000000000000000000000000000000000000000000000000000001000000010000000100010011010"
  4.58  4.27      OK
  4.59  4.28 AT+COPS=0,2,"23003"
  4.62  4.32      OK
  4.64  4.33 AT+CGDCONT=1,"IP","hardwario.com"
  4.69  4.38      OK
  4.70  4.39 AT+CFUN=1
  4.79  4.49      OK
  5.66  5.35      %XSIM: 1
  5.67  5.37 AT+CGSN
  5.71  5.40      351358811477626
  5.72  5.41      OK
  5.74  5.43 AT+CIMI
  5.77  5.46      242016000036132
  5.78  5.48      OK
  5.96  5.65      +CEREG: 2,"7AA9","01172803",7
  5.99  5.68      +CSCON: 1
  7.04  6.73      +CGEV: ME PDN ACT 0
  7.08  6.77      %MDMEV: SEARCH STATUS 2
  7.11  6.81      +CEREG: 1,"7AA9","01172803",7,,,"00000000","00111000"
  7.15  6.84      +CGEV: IPV6 0
 19.21 18.90      +CSCON: 0
138.60 138.29 Failed to get: +CEREG: 5 !!! Wed May  4 20:45:43 2022

I then changed to iBasis SIM (since script complained about CEREG: 5 – Registered, roaming). This time it succeeded, and went through 7 cycles and 35 min wait.  

C:\Temp\Support\286487>python nrf9160_slm_at_dialogue.py
Power cycle nRF9160DK, press Enter
========== CYCLE: 1 ========== Wed May  4 20:48:58 2022
  0.31  0.00 <RESET by pin>
  1.43  1.12 <WAKEUP by pin>
  2.21  1.90      Ready
  2.23  1.92 AT
  2.26  1.95      OK
  2.27  1.96 AT%XMODEMTRACE=1,2
  2.30  2.00      OK
  2.32  2.01 AT%MDMEV=1
  2.35  2.04      OK
  2.37  2.06 AT%HWVERSION
  2.40  2.09      %HWVERSION: nRF9160 SICA B1A
  2.41  2.10      OK
  2.43  2.12 AT%SHORTSWVER
  2.46  2.15      %SHORTSWVER: nrf9160_1.3.1
  2.48  2.17      OK
  2.49  2.18 AT%XPOFWARN=1,30
  2.54  2.23      OK
  2.55  2.24 AT%XSYSTEMMODE=1,0,0,1
  2.60  2.29      OK
  2.62  2.31 AT%REL14FEAT=1,1,1,1,0
  2.65  2.34      OK
  2.66  2.36 AT%RAI=1
  2.70  2.39      OK
  2.71  2.40 AT%XDATAPRFL=0
  2.74  2.43      OK
  2.76  2.45 AT%XSIM=1
  2.79  2.48      OK
  2.80  2.50 AT%XNETTIME=1
  2.84  2.53      OK
  2.85  2.54 AT+CEREG=5
  2.88  2.57      OK
  2.90  2.59 AT+CGEREP=1
  2.93  2.62      OK
  2.94  2.64 AT+CSCON=1
  2.98  2.67      OK
  2.99  2.68 AT+CPSMS=1,"","","00111000","00000000"
  3.04  2.73      OK
  3.05  2.75 AT+CNEC=24
  3.08  2.78      OK
  3.10  2.79 AT+CMEE=1
  3.13  2.82      OK
  3.15  2.84 AT+CEPPI=1
  3.18  2.87      OK
  3.19  2.89 AT#XSLEEP=2
  3.23  2.92      OK
  4.36  4.05 <WAKEUP by pin>
  4.46  4.16      Ready
  4.48  4.17 AT%XMODEMTRACE=1,2
  4.51  4.20      OK
  4.53  4.22 AT%XBANDLOCK=1,"0000000000000000000000000000000000000000000000000000000000001000000010000000100010011010"
  4.57  4.27      OK
  4.59  4.28 AT+COPS=0,2,"23003"
  4.64  4.33      OK
  4.65  4.34 AT+CGDCONT=1,"IP","hardwario.com"
  4.68  4.37      OK
  4.70  4.39 AT+CFUN=1
  4.79  4.48      OK
  5.98  5.67      %XSIM: 1
  6.00  5.69 AT+CGSN
  6.03  5.72      351358811477626
  6.04  5.74      OK
  6.06  5.75 AT+CIMI
  6.09  5.78      204080813517083
  6.11  5.80      OK
  8.64  8.33      +CEREG: 2,"08FF","0201EE16",7
  8.67  8.36      +CSCON: 1
 11.42 11.11      +CGEV: ME PDN ACT 0,0
 11.45 11.15      +CNEC_ESM: 50,0
 11.48 11.18      %MDMEV: SEARCH STATUS 2
 11.52 11.21      +CEREG: 5,"08FF","0201EE16",7,,,"11100000","11100000"
Wait 2m
========== CYCLE: 2 ========== Wed May  4 20:51:09 2022
131.85  0.00 <RESET by pin>
132.96  1.11 <WAKEUP by pin>
133.75  1.90      Ready
133.76  1.91 AT
133.79  1.94      OK
133.81  1.96 AT%XMODEMTRACE=1,2
133.84  1.99      OK
133.86  2.01 AT%MDMEV=1
133.89  2.04      OK
133.90  2.05 AT%HWVERSION
133.93  2.09      %HWVERSION: nRF9160 SICA B1A
133.95  2.10      OK
133.96  2.12 AT%SHORTSWVER
133.99  2.15      %SHORTSWVER: nrf9160_1.3.1
134.01  2.16      OK
134.03  2.18 AT%XPOFWARN=1,30
134.07  2.23      OK
134.09  2.24 AT%XSYSTEMMODE=1,0,0,1
134.14  2.29      OK
134.15  2.30 AT%REL14FEAT=1,1,1,1,0
134.18  2.34      OK
134.20  2.35 AT%RAI=1
134.23  2.38      OK
134.25  2.40 AT%XDATAPRFL=0
134.28  2.43      OK
134.29  2.45 AT%XSIM=1
134.32  2.48      OK
134.34  2.49 AT%XNETTIME=1
134.37  2.52      OK
134.39  2.54 AT+CEREG=5
134.42  2.57      OK
134.43  2.58 AT+CGEREP=1
134.46  2.62      OK
134.48  2.63 AT+CSCON=1
134.51  2.66      OK
134.53  2.68 AT+CPSMS=1,"","","00111000","00000000"
134.57  2.72      OK
134.59  2.74 AT+CNEC=24
134.62  2.77      OK
134.64  2.79 AT+CMEE=1
134.67  2.82      OK
134.68  2.83 AT+CEPPI=1
134.71  2.87      OK
134.73  2.88 AT#XSLEEP=2
134.76  2.91      OK
135.91  4.06 <WAKEUP by pin>
136.01  4.16      Ready
136.03  4.18 AT%XMODEMTRACE=1,2
136.06  4.21      OK
136.07  4.23 AT%XBANDLOCK=1,"0000000000000000000000000000000000000000000000000000000000001000000010000000100010011010"
136.12  4.27      OK
136.14  4.29 AT+COPS=0,2,"23003"
136.18  4.33      OK
136.20  4.35 AT+CGDCONT=1,"IP","hardwario.com"
136.23  4.38      OK
136.24  4.40 AT+CFUN=1
136.34  4.49      OK
137.54  5.70      %XSIM: 1
137.56  5.71 AT+CGSN
137.59  5.74      351358811477626
137.61  5.76      OK
137.62  5.77 AT+CIMI
137.65  5.80      204080813517083
137.67  5.82      OK
140.44  8.59      +CEREG: 2,"08FF","0201EE16",7
140.82  8.98      +CSCON: 1
143.73 11.88      +CGEV: ME PDN ACT 0,0
143.76 11.91      +CNEC_ESM: 50,0
143.79 11.94      %MDMEV: SEARCH STATUS 2
143.82 11.97      +CEREG: 5,"08FF","0201EE16",7,,,"11100000","11100000"
Wait 2m
========== CYCLE: 3 ========== Wed May  4 20:53:21 2022
264.18  0.00 <RESET by pin>
265.29  1.11 <WAKEUP by pin>
266.07  1.89      Ready
266.09  1.91 AT
266.12  1.94      OK
266.14  1.96 AT%XMODEMTRACE=1,2
266.17  1.99      OK
266.18  2.00 AT%MDMEV=1
266.21  2.03      OK
266.23  2.05 AT%HWVERSION
266.26  2.08      %HWVERSION: nRF9160 SICA B1A
266.28  2.10      OK
266.29  2.11 AT%SHORTSWVER
266.32  2.14      %SHORTSWVER: nrf9160_1.3.1
266.34  2.16      OK
266.35  2.18 AT%XPOFWARN=1,30
266.40  2.22      OK
266.42  2.24 AT%XSYSTEMMODE=1,0,0,1
266.46  2.28      OK
266.48  2.30 AT%REL14FEAT=1,1,1,1,0
266.51  2.33      OK
266.52  2.35 AT%RAI=1
266.56  2.38      OK
266.57  2.39 AT%XDATAPRFL=0
266.60  2.42      OK
266.62  2.44 AT%XSIM=1
266.65  2.47      OK
266.67  2.49 AT%XNETTIME=1
266.70  2.52      OK
266.71  2.53 AT+CEREG=5
266.74  2.57      OK
266.76  2.58 AT+CGEREP=1
266.79  2.61      OK
266.81  2.63 AT+CSCON=1
266.84  2.66      OK
266.85  2.67 AT+CPSMS=1,"","","00111000","00000000"
266.90  2.72      OK
266.92  2.74 AT+CNEC=24
266.95  2.77      OK
266.96  2.78 AT+CMEE=1
266.99  2.81      OK
267.01  2.83 AT+CEPPI=1
267.04  2.86      OK
267.06  2.88 AT#XSLEEP=2
267.09  2.91      OK
268.22  4.04 <WAKEUP by pin>
268.33  4.15      Ready
268.35  4.17 AT%XMODEMTRACE=1,2
268.38  4.20      OK
268.39  4.21 AT%XBANDLOCK=1,"0000000000000000000000000000000000000000000000000000000000001000000010000000100010011010"
268.44  4.26      OK
268.46  4.28 AT+COPS=0,2,"23003"
268.50  4.32      OK
268.52  4.34 AT+CGDCONT=1,"IP","hardwario.com"
268.57  4.39      OK
268.58  4.40 AT+CFUN=1
268.68  4.50      OK
269.88  5.70      %XSIM: 1
269.90  5.72 AT+CGSN
269.93  5.75      351358811477626
269.94  5.76      OK
269.96  5.78 AT+CIMI
269.99  5.81      204080813517083
270.00  5.82      OK
272.51  8.33      +CEREG: 2,"08FF","0201EE16",7
272.66  8.48      +CSCON: 1
275.57 11.39      +CGEV: ME PDN ACT 0,0
275.61 11.43      +CNEC_ESM: 50,0
275.64 11.46      %MDMEV: SEARCH STATUS 2
275.67 11.49      +CEREG: 5,"08FF","0201EE16",7,,,"11100000","11100000"
Wait 2m
========== CYCLE: 4 ========== Wed May  4 20:55:33 2022
396.01  0.00 <RESET by pin>
397.11  1.10 <WAKEUP by pin>
397.91  1.90      Ready
397.94  1.93 AT
397.97  1.96      OK
397.99  1.98 AT%XMODEMTRACE=1,2
398.02  2.01      OK
398.03  2.02 AT%MDMEV=1
398.07  2.05      OK
398.08  2.07 AT%HWVERSION
398.11  2.10      %HWVERSION: nRF9160 SICA B1A
398.13  2.12      OK
398.14  2.13 AT%SHORTSWVER
398.17  2.16      %SHORTSWVER: nrf9160_1.3.1
398.19  2.18      OK
398.20  2.19 AT%XPOFWARN=1,30
398.25  2.24      OK
398.27  2.26 AT%XSYSTEMMODE=1,0,0,1
398.31  2.30      OK
398.33  2.32 AT%REL14FEAT=1,1,1,1,0
398.36  2.35      OK
398.38  2.37 AT%RAI=1
398.41  2.40      OK
398.42  2.41 AT%XDATAPRFL=0
398.45  2.44      OK
398.47  2.46 AT%XSIM=1
398.50  2.49      OK
398.51  2.50 AT%XNETTIME=1
398.54  2.53      OK
398.56  2.55 AT+CEREG=5
398.59  2.58      OK
398.61  2.60 AT+CGEREP=1
398.64  2.63      OK
398.65  2.64 AT+CSCON=1
398.68  2.67      OK
398.70  2.69 AT+CPSMS=1,"","","00111000","00000000"
398.75  2.74      OK
398.76  2.75 AT+CNEC=24
398.79  2.78      OK
398.81  2.80 AT+CMEE=1
398.84  2.83      OK
398.85  2.84 AT+CEPPI=1
398.89  2.88      OK
398.90  2.89 AT#XSLEEP=2
398.93  2.92      OK
400.05  4.04 <WAKEUP by pin>
400.15  4.14      Ready
400.17  4.16 AT%XMODEMTRACE=1,2
400.20  4.19      OK
400.22  4.21 AT%XBANDLOCK=1,"0000000000000000000000000000000000000000000000000000000000001000000010000000100010011010"
400.27  4.25      OK
400.28  4.27 AT+COPS=0,2,"23003"
400.33  4.32      OK
400.34  4.33 AT+CGDCONT=1,"IP","hardwario.com"
400.39  4.38      OK
400.40  4.39 AT+CFUN=1
400.50  4.49      OK
401.71  5.70      %XSIM: 1
401.72  5.71 AT+CGSN
401.76  5.75      351358811477626
401.77  5.76      OK
401.79  5.78 AT+CIMI
401.82  5.81      204080813517083
401.83  5.82      OK
404.65  8.64      +CEREG: 2,"7AA9","01172803",7
404.68  8.67      +CSCON: 1
408.15 12.14      +CGEV: ME PDN ACT 0,0
408.18 12.17      +CNEC_ESM: 50,0
408.21 12.20      %MDMEV: SEARCH STATUS 2
408.24 12.23      +CEREG: 5,"7AA9","01172803",7,,,"00000000","00111000"
Wait 2m
========== CYCLE: 5 ========== Wed May  4 20:57:46 2022
528.59  0.00 <RESET by pin>
529.70  1.12 <WAKEUP by pin>
530.49  1.90      Ready
530.51  1.92 AT
530.54  1.95      OK
530.55  1.96 AT%XMODEMTRACE=1,2
530.58  2.00      OK
530.60  2.01 AT%MDMEV=1
530.63  2.04      OK
530.65  2.06 AT%HWVERSION
530.68  2.09      %HWVERSION: nRF9160 SICA B1A
530.69  2.11      OK
530.71  2.12 AT%SHORTSWVER
530.74  2.15      %SHORTSWVER: nrf9160_1.3.1
530.76  2.17      OK
530.77  2.18 AT%XPOFWARN=1,30
530.82  2.23      OK
530.83  2.25 AT%XSYSTEMMODE=1,0,0,1
530.88  2.29      OK
530.90  2.31 AT%REL14FEAT=1,1,1,1,0
530.93  2.34      OK
530.94  2.36 AT%RAI=1
530.98  2.39      OK
530.99  2.40 AT%XDATAPRFL=0
531.02  2.44      OK
531.04  2.45 AT%XSIM=1
531.07  2.48      OK
531.08  2.50 AT%XNETTIME=1
531.11  2.53      OK
531.13  2.54 AT+CEREG=5
531.16  2.57      OK
531.18  2.59 AT+CGEREP=1
531.21  2.62      OK
531.22  2.63 AT+CSCON=1
531.25  2.67      OK
531.27  2.68 AT+CPSMS=1,"","","00111000","00000000"
531.32  2.73      OK
531.33  2.74 AT+CNEC=24
531.36  2.78      OK
531.38  2.79 AT+CMEE=1
531.41  2.82      OK
531.43  2.84 AT+CEPPI=1
531.46  2.87      OK
531.47  2.89 AT#XSLEEP=2
531.51  2.92      OK
532.64  4.06 <WAKEUP by pin>
532.76  4.17      Ready
532.78  4.19 AT%XMODEMTRACE=1,2
532.81  4.22      OK
532.82  4.24 AT%XBANDLOCK=1,"0000000000000000000000000000000000000000000000000000000000001000000010000000100010011010"
532.87  4.28      OK
532.89  4.30 AT+COPS=0,2,"23003"
532.93  4.35      OK
532.95  4.36 AT+CGDCONT=1,"IP","hardwario.com"
532.99  4.41      OK
533.01  4.42 AT+CFUN=1
533.10  4.51      OK
534.32  5.73      %XSIM: 1
534.33  5.75 AT+CGSN
534.36  5.78      351358811477626
534.38  5.79      OK
534.40  5.81 AT+CIMI
534.43  5.84      204080813517083
534.44  5.86      OK
537.76  9.18      +CEREG: 2,"7AA9","01172803",7
537.79  9.21      +CSCON: 1
541.19 12.60      +CGEV: ME PDN ACT 0,0
541.22 12.63      +CNEC_ESM: 50,0
541.25 12.66      %MDMEV: SEARCH STATUS 2
541.28 12.69      +CEREG: 5,"7AA9","01172803",7,,,"00000000","00111000"
Wait 2m
========== CYCLE: 6 ========== Wed May  4 20:59:59 2022
661.63  0.00 <RESET by pin>
662.73  1.10 <WAKEUP by pin>
663.52  1.89      Ready
663.54  1.91 AT
663.57  1.94      OK
663.58  1.95 AT%XMODEMTRACE=1,2
663.61  1.98      OK
663.63  2.00 AT%MDMEV=1
663.66  2.03      OK
663.68  2.05 AT%HWVERSION
663.71  2.08      %HWVERSION: nRF9160 SICA B1A
663.72  2.09      OK
663.74  2.11 AT%SHORTSWVER
663.77  2.14      %SHORTSWVER: nrf9160_1.3.1
663.78  2.16      OK
663.80  2.17 AT%XPOFWARN=1,30
663.85  2.22      OK
663.86  2.23 AT%XSYSTEMMODE=1,0,0,1
663.91  2.28      OK
663.93  2.30 AT%REL14FEAT=1,1,1,1,0
663.96  2.33      OK
663.97  2.34 AT%RAI=1
664.00  2.37      OK
664.02  2.39 AT%XDATAPRFL=0
664.05  2.42      OK
664.07  2.44 AT%XSIM=1
664.10  2.47      OK
664.11  2.49 AT%XNETTIME=1
664.15  2.52      OK
664.16  2.53 AT+CEREG=5
664.19  2.56      OK
664.21  2.58 AT+CGEREP=1
664.24  2.61      OK
664.25  2.63 AT+CSCON=1
664.29  2.66      OK
664.30  2.67 AT+CPSMS=1,"","","00111000","00000000"
664.35  2.72      OK
664.36  2.73 AT+CNEC=24
664.40  2.77      OK
664.41  2.78 AT+CMEE=1
664.44  2.81      OK
664.46  2.83 AT+CEPPI=1
664.49  2.86      OK
664.50  2.87 AT#XSLEEP=2
664.53  2.91      OK
665.66  4.03 <WAKEUP by pin>
665.77  4.14      Ready
665.78  4.15 AT%XMODEMTRACE=1,2
665.81  4.18      OK
665.83  4.20 AT%XBANDLOCK=1,"0000000000000000000000000000000000000000000000000000000000001000000010000000100010011010"
665.87  4.25      OK
665.89  4.26 AT+COPS=0,2,"23003"
665.94  4.31      OK
665.95  4.32 AT+CGDCONT=1,"IP","hardwario.com"
666.00  4.37      OK
666.02  4.39 AT+CFUN=1
666.11  4.48      OK
667.32  5.69      %XSIM: 1
667.33  5.71 AT+CGSN
667.37  5.74      351358811477626
667.38  5.75      OK
667.40  5.77 AT+CIMI
667.43  5.80      204080813517083
667.44  5.82      OK
670.16  8.53      +CEREG: 2,"08FF","0201EE16",7
670.19  8.56      +CSCON: 1
672.78 11.15      +CGEV: ME PDN ACT 0,0
672.81 11.18      +CNEC_ESM: 50,0
672.84 11.21      %MDMEV: SEARCH STATUS 2
672.87 11.24      +CEREG: 5,"08FF","0201EE16",7,,,"11100000","11100000"
Wait 2m
========== CYCLE: 7 ========== Wed May  4 21:02:10 2022
793.21  0.00 <RESET by pin>
794.32  1.10 <WAKEUP by pin>
795.11  1.90      Ready
795.12  1.91 AT
795.16  1.94      OK
795.17  1.96 AT%XMODEMTRACE=1,2
795.20  1.99      OK
795.22  2.01 AT%MDMEV=1
795.25  2.04      OK
795.26  2.05 AT%HWVERSION
795.30  2.08      %HWVERSION: nRF9160 SICA B1A
795.31  2.10      OK
795.33  2.12 AT%SHORTSWVER
795.36  2.15      %SHORTSWVER: nrf9160_1.3.1
795.37  2.16      OK
795.39  2.18 AT%XPOFWARN=1,30
795.44  2.22      OK
795.45  2.24 AT%XSYSTEMMODE=1,0,0,1
795.50  2.29      OK
795.51  2.30 AT%REL14FEAT=1,1,1,1,0
795.54  2.33      OK
795.56  2.35 AT%RAI=1
795.59  2.38      OK
795.61  2.40 AT%XDATAPRFL=0
795.64  2.43      OK
795.66  2.44 AT%XSIM=1
795.69  2.47      OK
795.70  2.49 AT%XNETTIME=1
795.73  2.52      OK
795.75  2.54 AT+CEREG=5
795.78  2.57      OK
795.80  2.58 AT+CGEREP=1
795.83  2.61      OK
795.84  2.63 AT+CSCON=1
795.87  2.66      OK
795.89  2.68 AT+CPSMS=1,"","","00111000","00000000"
795.94  2.72      OK
795.95  2.74 AT+CNEC=24
795.98  2.77      OK
796.00  2.78 AT+CMEE=1
796.03  2.82      OK
796.04  2.83 AT+CEPPI=1
796.07  2.86      OK
796.09  2.88 AT#XSLEEP=2
796.12  2.91      OK
797.25  4.04 <WAKEUP by pin>
797.36  4.14      Ready
797.37  4.16 AT%XMODEMTRACE=1,2
797.40  4.19      OK
797.42  4.21 AT%XBANDLOCK=1,"0000000000000000000000000000000000000000000000000000000000001000000010000000100010011010"
797.46  4.25      OK
797.48  4.27 AT+COPS=0,2,"23003"
797.53  4.31      OK
797.54  4.33 AT+CGDCONT=1,"IP","hardwario.com"
797.59  4.38      OK
797.61  4.39 AT+CFUN=1
797.70  4.49      OK
798.91  5.70      %XSIM: 1
798.93  5.72 AT+CGSN
798.96  5.75      351358811477626
798.98  5.76      OK
798.99  5.78 AT+CIMI
799.02  5.81      204080813517083
799.04  5.83      OK
802.11  8.90      +CEREG: 2,"7AA9","01172803",7
Wait 2m
Reset reset loop
922.44  0.00 <RESET by pin>
Wait 35m
3022.75  0.00 <RESET by pin>
3023.87  1.12 <WAKEUP by pin>
3024.66  1.91      Ready
3024.68  1.92 AT
3024.71  1.95      OK
3024.72  1.97 AT%XMODEMTRACE=1,2
3024.75  2.00      OK
3024.77  2.02 AT%MDMEV=1
3024.80  2.05      OK
3024.81  2.06 AT%HWVERSION
3024.85  2.09      %HWVERSION: nRF9160 SICA B1A
3024.86  2.11      OK
3024.88  2.12 AT%SHORTSWVER
3024.91  2.15      %SHORTSWVER: nrf9160_1.3.1
3024.92  2.17      OK
3024.94  2.19 AT%XPOFWARN=1,30
3024.98  2.23      OK
3025.00  2.25 AT%XSYSTEMMODE=1,0,0,1
3025.05  2.29      OK
3025.06  2.31 AT%REL14FEAT=1,1,1,1,0
3025.09  2.34      OK
3025.11  2.36 AT%RAI=1
3025.14  2.39      OK
3025.16  2.41 AT%XDATAPRFL=0
3025.19  2.44      OK
3025.21  2.45 AT%XSIM=1
3025.24  2.48      OK
3025.25  2.50 AT%XNETTIME=1
3025.28  2.53      OK
3025.30  2.55 AT+CEREG=5
3025.33  2.58      OK
3025.35  2.59 AT+CGEREP=1
3025.38  2.62      OK
3025.39  2.64 AT+CSCON=1
3025.42  2.67      OK
3025.44  2.69 AT+CPSMS=1,"","","00111000","00000000"
3025.49  2.73      OK
3025.50  2.75 AT+CNEC=24
3025.53  2.78      OK
3025.55  2.80 AT+CMEE=1
3025.58  2.83      OK
3025.60  2.85 AT+CEPPI=1
3025.63  2.88      OK
3025.64  2.89 AT#XSLEEP=2
3025.68  2.92      OK
3026.81  4.06 <WAKEUP by pin>
3026.92  4.17      Ready
3026.94  4.18 AT%XMODEMTRACE=1,2
3026.97  4.21      OK
3026.98  4.23 AT%XBANDLOCK=1,"0000000000000000000000000000000000000000000000000000000000001000000010000000100010011010"
3027.03  4.28      OK
3027.04  4.29 AT+COPS=0,2,"23003"
3027.09  4.34      OK
3027.11  4.35 AT+CGDCONT=1,"IP","hardwario.com"
3027.14  4.39      OK
3027.15  4.40 AT+CFUN=1
3027.25  4.50      OK
3028.45  5.70      %XSIM: 1
3028.47  5.72 AT+CGSN
3028.50  5.75      351358811477626
3028.52  5.76      OK
3028.53  5.78 AT+CIMI
3028.56  5.81      204080813517083
3028.58  5.83      OK
3031.79  9.04      +CEREG: 2,"7AA9","01172803",7
3032.03  9.28      +CSCON: 1
3035.68 12.93      +CGEV: ME PDN ACT 0,0
3035.71 12.96      +CNEC_ESM: 50,0
3035.74 12.99      %MDMEV: SEARCH STATUS 2
3035.78 13.02      +CEREG: 5,"7AA9","01172803",7,,,"00000000","00111000"

I did not receive %MDMEV: RESET LOOP

Kind regards,
Øyvind