Onomondo static profile with nrf9161 custom board not working

[simon884]

Hi,

I'm working with a custom board build with an nrf9161, I've created my board from nrf9161dk board (change some pin and defintion), I'm able to flash and build? I can use my custom led, my i2c bus, so I thought my custom board is well defined.

Right now I'm trying to use onomondo softsim profile, but ùy softsim never connect. To debug I've tried to do this here but same result not working. Just to know I have tried my source code with nordic nrf9160dk and it's working I'm able to have lte event and I can see my sim connected on onomondo, so the bug is not on my code...

Here is AT command I have tried :

[00:00*** Booting nRF Connect SDK v3.5.99-ncs1-1 ***
[00:00:00.326,324] <inf> nrf_modem: Initializing libmodem 2.6.1-lte-11b6ed4846a8
[00:00:00.570,983] <inf> nrf_modem: RPC ready
[00:00:00.619,964] <inf> gcg: Waiting for LTE connect event.

> AT
OK
> AT+CEREG?
+CEREG: 5,4
OK
+CEREG: 2,"E29D","09891B07",7
[00:03:30.427,307] <inf> gcg: LTE cell changed: Cell ID: 159980295, Tracking area: 58013 //always got only this event only, and look strange this event take always some time to come..

> AT+CEREG?
+CEREG: 5,2,"E29D","09891B07",7  // should have +CEREG: 1,5 from onomondo tutorial
OK

> AT+CESQ
+CESQ: 99,99,255,255,16,58
OK

> AT+CEREG=1
OK
> AT+COPS?
+COPS: 0
OK
> AT+CGDCONT=1,"IP","onomondo"
OK
> AT+CGACT=1,1
ERROR

> AT+CGMR
mfw_nrf91x1_2.0.1
OK

I can upload my board definition, tell me. Don't understand why it's working on 9160dk and not on my board, maybe bad board definition, I hope it's not an hardware issue with my custom board

Thanks for help

[Asbjørn]

Hi Simon,

regarding the capturing of the trace. You have to cpature it to a file and open it.

https://docs.nordicsemi.com/bundle/nrfutil/page/nrfutil-trace/guides/tracing_9160_modem_binary.html

The antenna connection, are you able to see TX operation from your board with a spectrum analyser? Again, I don't know what the HW looks like, but the antenna connection is definitely something to follow. I suspect the receiver on the nRF91 on your custom board is able to receive singals from the network, but the outgoing connection request and TX operations are not getting through back to the network. Placement of the antenna and location of the kit compared to windows and obstacles is worth testing out. 

Best regards

Asbjørn

[simon884]

Hi Asbjørn

When I'm trying to capture with nrfutil my trace is always zero octet.

./nrfutil device list
101c4425765aed11b7fd8a1d4f779c9c
product         CP2102N USB to UART Bridge Controller
ports           /dev/tty.usbserial-14320
traits          serialPorts, usb

1
product         CP2102 USB to UART Bridge Controller
ports           /dev/tty.usbserial-0001
traits          serialPorts, usb

Found 2 supported device(s)

usbserial-0001 is cp21 where uart1 is connected (if I use nrf serial terminal with 1000000 baudrate I see datas)

./nrfutil trace lte --input-serialport /dev/tty.usbserial-0002 --output-raw trace.raw

trace.raw is always empty... Don't understand why because I see my cp21 rx led blinking

For my nrf here is the part of my schematic for LTE