The modem restarts after sending the command AT+CFUN=1

RE: The modem restarts after sending the command AT+CFUN=1

Martin Lesund — Tue, 25 Aug 2020 13:31:19 GMT

OK,
I just saw you last response.

Just let me know if anything else is unclear.

Best regards,
Martin L.

RE: The modem restarts after sending the command AT+CFUN=1

Martin Lesund — Tue, 25 Aug 2020 13:29:49 GMT

Hi Yury,

Sorry, but it is still invalid.

A trace should be several 100-1000KB.

RE: The modem restarts after sending the command AT+CFUN=1

Yury Morgunov — Tue, 25 Aug 2020 11:49:46 GMT

I got an oscilloscope and this is what I found on the 5V line

When I turn on the power, there is a strong voltage drop.
Strange but I tried different usb wires and used different usb power supplies. Only an external power supply of 5 volts helped. Even with an external power supply connected, the voltage briefly drops to 4V. In general, the reason is clear, now I will understand why the voltage drops so much

Many thanks for the help

RE: The modem restarts after sending the command AT+CFUN=1

Yury Morgunov — Tue, 25 Aug 2020 10:21:40 GMT

I remember exactly that Tace size was not equal to 0, maybe I accidentally sent the wrong file ...
Here's another one. Trace size = 334 B

devzone.nordicsemi.com/.../trace_2D00_2020_2D00_08_2D00_25T10_2D00_18_2D00_52.520Z.bin

RE: The modem restarts after sending the command AT+CFUN=1

Martin Lesund — Tue, 25 Aug 2020 06:42:08 GMT

Hi Yury,
The modem trace you sent (.bin file) was empty.
Please make sure you have followed the guide correctly: https://devzone.nordicsemi.com/nordic/cellular-iot-guides/b/getting-started-cellular/posts/how-to-get-modem-trace-using-trace-collector-in-nrf-connect

Also what I mean by serial output, is the actual logging from the application. (This can be seen from the LTE Link Monitor or just a serial output terminal)

RE: The modem restarts after sending the command AT+CFUN=1

Yury Morgunov — Tue, 25 Aug 2020 05:52:45 GMT

Hi Martin,

I'm sorry, but I don't quite understand what you mean. I sent a trace when the modem crashes, is that not enough?

RE: The modem restarts after sending the command AT+CFUN=1

Martin Lesund — Thu, 20 Aug 2020 11:25:21 GMT

Hi Yury,
I was hoping you could share the full serial output of the responses when running the at_client.

Please try to redo the modem trace, it was invalid. (only 1Kb)

RE: The modem restarts after sending the command AT+CFUN=1

Yury Morgunov — Wed, 19 Aug 2020 12:55:24 GMT

I apologize for the long answer, for some reason I stopped receiving notifications.

I have done what you asked.

After starting the command was sent:

AT+CFUN? 
+CFUN: 0 
OK

Then I pressed reset and sent the following command:

AT+CFUN=1 
OK

Waited for the device to restart and stopped the tracer

here is trace.bin:

devzone.nordicsemi.com/.../trace_2D00_2020_2D00_08_2D00_19T12_2D00_39_2D00_39.333Z.bin

Here's the log if needed:

devzone.nordicsemi.com/.../2020_2D00_08_2D00_19T12_5F00_39_5F00_23.258Z_2D00_log.txt

RE: The modem restarts after sending the command AT+CFUN=1

Martin Lesund — Mon, 17 Aug 2020 07:31:50 GMT

Hi Yury,
Please open the Programmer app in nRF Connect, then delete what is on the flash.

Then flash the following version of the at_client:
devzone.nordicsemi.com/.../atclient_5F00_trace_5F00_enabled.hex

Then open the trace collector and LTE Link monitor and connect to the device.

Then start capturing and hit the "reset" button on the nRF91DK so you get the boot up message in LTE Link Monitor and then you can issue the AT commands as you want.

Then send me the Trace collector file when you are finished with the trace.

If the trace collector does not get any data, please issue the command AT%XMODEMTRACE=1,2 then AT+CFUN=0 then redo the capture as described here.

RE: The modem restarts after sending the command AT+CFUN=1

Yury Morgunov — Wed, 12 Aug 2020 05:41:44 GMT

Unfortunately, it didn't help. The device keeps restarting after sending command AT+CFUN=1.

devzone.nordicsemi.com/.../2020_2D00_08_2D00_12T05_5F00_39_5F00_41.371Z_2D00_log.txt

RE: The modem restarts after sending the command AT+CFUN=1

Martin Lesund — Tue, 11 Aug 2020 11:08:57 GMT

Hi Yury,
Please update the mfw to a newer one: https://www.nordicsemi.com/Products/Low-power-cellular-IoT/nRF9160/Download#infotabs

Then just run the regular unmodified AT Client (also attached: devzone.nordicsemi.com/.../at_5F00_client_5F00_nrf91dk.hex)

Then turn ON "Automatic Requests" when you test:

RE: The modem restarts after sending the command AT+CFUN=1

Yury Morgunov — Tue, 11 Aug 2020 10:49:41 GMT

I have enabled the following logs

CONFIG_CONSOLE=y
CONFIG_SERIAL=y
CONFIG_NET_LOG=y
CONFIG_LTE_LINK_CONTROL_LOG_LEVEL_DBG=y
CONFIG_LOG_BLOCK_IN_THREAD=y
CONFIG_AT_CMD_LOG_LEVEL_DBG=y
CONFIG_NET_IF_LOG_LEVEL_DBG=y
CONFIG_UART_MUX_LOG_LEVEL_DBG=y
CONFIG_UART_CONSOLE_LOG_LEVEL_DBG=y
CONFIG_NET_SOCKETS_LOG_LEVEL_DBG=y

and attached a log file - devzone.nordicsemi.com/.../2020_2D00_08_2D00_11T10_5F00_46_5F00_44.317Z_2D00_log.txt

RE: The modem restarts after sending the command AT+CFUN=1

Martin Lesund — Tue, 11 Aug 2020 09:08:01 GMT

Hi Yury,
Please share the full log from LTE Link Monitor.