AT commands timing out in LTE Link Monitor

[Alf99]

Hi, I have a nRF9160 DK, and trying it out with my mac connected to the USB.
However, I seem not to really connect to it?
I've installed the nRF Connect app, and also the LTE Link Monitor.
I installed the J-Link SW separately, after that I seem to be able to connect to the DK via one of the 3 serial ports that's available in the "Select device"-menu, but if I try some of the AT-commands it times out.

The board seems to be functioning, both LED1 and LED2 are flashing after some 20 seconds.

I have not gone through the "Getting Started Assistant", nor have I installed the tool chain, SDK etc, do I have to do that to run the LTE Link Monitor?

[Sigurd]

Hi,

The nRF9160-DK comes pre-programmed with the asset tracker demo application. Please follow the steps here, under "Get your nRF9160 DK online", to register the SIM-card and test this demo application.

After that, if you want to start developing, you need to install the toolchain. In nRF Connect app, install the "Getting started Assistant app" and follow the steps in that app. Also check out this site.

After you have registred the SIM-card, and finished testing the asset tracker demo application, you can then test the AT client sample with the LTE Link Monitor. See this page. For convenience, here is the pre-compiled at client sample hex: at_client_merged.hex

[Alf99]

Hi and thanks, I finally got installed the tool chain, and the SEGGER studio also.

I've registered the sim ok, and have downloaded and installed the .hex-file from you with the programmer, and now the AT-commands work fine in the Link Monitor.

However, browsing the AT-commands manual (nRF91 AT Commands - Nordic Infocenter - Nordic Semiconductorhttps://infocenter.nordicsemi.com/pdf/nrf91_at_commands_v0.7.pdf) I cannot find any AT-commands related to i.e. TCP or UDP connection and sending data?

I would like to try out UDP sending/reception and also testing out the PSM modes, all via AT-commands, do you have any examples for this?

[Sigurd]

Alf99 said:

Hi and thanks, I finally got installed the tool chain, and the SEGGER studio also.

Great!

Alf99 said:

I cannot find any AT-commands related to i.e. TCP or UDP connection and sending data?

There is no AT-Command for that, for TCP/UDP connections, this has to be done through a socket library, bsdlib, which provides a API with berkeley sockets (socket(), recv(), connect(), listen() etc). BSDlib provides the main interface to the IP stack and the LTE modem. It provides sockets for UDP, TCP, DTLS, TLS, and AT commands. There's some TCP and UDP examples here: https://github.com/Rallare/fw-nrfconnect-nrf/tree/nrf9160_samples/samples/nrf9160

This sample shows UDP with PSM: https://github.com/Rallare/fw-nrfconnect-nrf/blob/nrf9160_samples/samples/nrf9160/udp_with_psm/src/main.c