[Ovmsdev] No GSM connection

[Chris van der Meijden]

For the second time within a month I have no GSM connection and I'm not
able to reestablish the connection.

The SIM card is "Congstar" Prepaid (with enough money on the card). The
Network is 2G and connections are normally without any problems here.

What I can see, is that I have a signal around -70 dBm, but can't get a
network registration:

Cellular Modem

MODEM Status
Model: SIM5360
Network Registration: Searching
Provider:
Signal: -69 dBm
Mode:
State: NetWait
Mux: Status up
PPP: Not running
GPS: Not running

I can't get an ICCID

Cellular modem configuration

SIM ICCID: (power cellular modem on to read) Power mode of cellular is
now on

This is the log output

log level debug cellular

D (455339) cellular: mux-tx #3: AT+CREG?;+CCLK?;+CSQ
D (455349) cellular: mux-rx-line #3: AT+CREG?;+CCLK?;+CSQ
D (455359) cellular: mux-rx-line #3: +CREG: 0,2
D (455359) cellular: mux-rx-line #3: +CCLK: "80/01/06,00:07:36+08"
D (455359) cellular: mux-rx-line #3: +CSQ: 22,99
D (455359) cellular: mux-rx-line #3: OK
D (456339) cellular: mux-tx #3: AT+CPSI?
D (456349) cellular: mux-rx-line #3: AT+CPSI?
D (456349) cellular: mux-rx-line #3: +CPSI: NO SERVICE,Online
D (456349) cellular: mux-rx-line #3: OK
D (457339) cellular: mux-tx #3: AT+COPS?
D (457349) cellular: mux-rx-line #3: AT+COPS?
D (457349) cellular: mux-rx-line #3: ERROR

and this is the Info output on the console

I (1444379) gsm-mux: Start MUX
I (1444449) gsm-mux: Channel #0 is open
I (1444459) gsm-mux: Channel #1 is open
I (1444459) gsm-mux: Channel #2 is open
I (1444469) gsm-mux: Channel #3 is open
I (1444479) gsm-mux: Channel #4 is open
I (1444789) webserver: HTTP POST /api/execute
I (1444799) webcommand: HttpCommandStream[0x3f8ba0b4]: 3478800 bytes
free, executing: cellular status
I (1445339) cellular: State: Enter NetWait state
I (1445599) webserver: HTTP POST /api/execute
I (1445599) webcommand: HttpCommandStream[0x3f8ba0b4]: 3478584 bytes
free, executing: cellular status
I (1455359) cellular: Network Registration status: Searching
I (1455359) cellular: Signal Quality is: 22 (-69 dBm)
I (1461919) webserver: HTTP GET /shell
I (1475359) cellular: Signal Quality is: 18 (-77 dBm)
I (1485359) cellular: Signal Quality is: 21 (-71 dBm)

The live events show this

Live Events

[08:02:08]system.modem.poweringon
[08:02:08]egpio.output.0.high
[08:02:10]egpio.output.0.low
[08:02:15]system.modem.installed
[08:02:15]system.modem.poweredon
[08:02:35]system.modem.muxstart
[08:02:36]system.modem.netwait

And this is my module information

Module

Last boot was 1719 second(s) ago
Time at boot: 2023-04-13 07:35:21 CEST
This is reset #0 since last power cycle
Detected boot reason: PowerOn (16/14)
Reset reason: Unknown/unset (0)
Crash counters: 0 total, 0 early
Hardware: OVMS WIFI BLE BT cores=2 rev=ESP32/1; MODEM SIM5360
Firmware: 3.3.003-413-ge0a8e914/ota_0/main (build idf v3.3.4-849-
g6e214dc33 Apr 12 2023 20:20:24)

Last time this happened I was able to get the connection back by
performing some esotheric button pressing on "Start Modem", "Stop
Modem" and "Power cellular Modem on" in the WebUI, but now it does not
help.

I compiled the newest version yesterday and I did some reboots of the
module and I even pulled the fuse to completely power off my OVMS in
the car, but no success.

Is there anything I can do to do some more troubleshooting? Any
thoughts on possible causes?

Thanx

Regards

Chris
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