LTE Link Monitor timing out

[Jared]

Hey All,

I'm running the LTE Link Monitor on nRF Connect 3.3.3. I'm connecting to my custom nR9160 Feather via the built in USB-to-Serial. I'm able to open the serial port in LTE Link Monitor. I hit the reset button and it shows the boot dialog. But when I tried to send commands, it doesn't respond.

While, if I try to connect via something like Cool Term I can issue AT commands without an issue.

I'm running on OSX 10.14.6

[Jared]

I was running on 1.2.0 of the SDK. Tried 1.3.0-rc1 with no success. I also tried to connect via a Windows VM with no luck. I'll try a completely different machine to confirm it's nothing weird here.

[Jared]

Ahh, I think I found the issue. Flow control is set active for modemtalk

My board doesn't have RTS and CTS to the USB-to-Serial! So that would solve that problem!

[Jared]

Disabling flow control has fixed the issue. It may be good to add that as an option in the app.

[Håkon Alseth]

Hi!

 

I will report this internally as a bug. Thank you for reporting, and good work on finding the root cause!

 

Kind regards,

Håkon

[Akash Patel]

Hi Jared,

Can you share how you disabled flow control in LTE Link Monitor? How and where did you modify the index.js file?

Here is what I did:

1. Inside of C:\Users\Akash\.nrfconnect-apps\local, I did: git clone https://github.com/NordicSemiconductor/pc-nrfconnect-linkmonitor
2. Inside C:\Users\Akash\.nrfconnect-apps\local\pc-nrfconnect-linkmonitor, I did npm install
3. npm run build
4. Tried opening the local version of the application in nRF Connect but got the following error: "Cannot convert undefined or null to object"

I followed the steps here: https://nordicsemiconductor.github.io/pc-nrfconnect-docs/getting_started

Regards,

Akash