LTE not connecting on my NRF9160 DK

[bdahleh]

Hello,

I am trying to conenct the DK to the nRF cloud. I registered the SIM successfully and then proceeded to insert the sim and power up the unit. The LED 3/4 sequence at first try indicated an LTE connection after about 5 minutes. I then proceeded to follow the button sequence steps for connecting ot the cloud without any success. After repeating the procecess unsuccesfully a few times, I now can no longer get the DK to connect to the LTE network (i.e. LED 4 does not come on to indicate connection).

Do I have a bad SIM? I didn't load any SW/FW on the DK yet. The startup instructions did not indicate that I should.

How do I proceed?

Thank you,
Basman.

[Bjørn Kvaale]

Hi Basman,

I would recommend you to download & program this FW to your board:

secure_boot.hex

at_client.hex

To program the hex files, you can run these two commands:

nrfjprog --program secure_boot.hex -f nrf91 --verify --sectorerase
nrfjprog --program asset_tracker.hex -f nrf91 --verify --sectorerase

I compiled the hex files from the v0.3.0 tag of the Nordic Connect SDK (NCS). There is documentation here that may be helpful. Also, this youtube video could be useful to watch.

First off, I just want to check if you are able to connect your SIM card to the base station.

[bdahleh]

Hi Bjorn,

I just saw that you responded today. THank you.

I believe that the sim card was registered properly. I went through the process.

I get so far as to add an LTE device and get to this screen:

I follow the button/switch sequence but nothing happens. I repeat the steps a few times and the timer in the right hand corner keeps ticking. Eventually the 2 flashing green lights that indicate its ready to connect to the cloud go blank.

I will look at the material you sent across and check back in.

Thanks,
Basman

[bdahleh]

Hello again,

I am unable to communicate with the board via usb. Is there another issue going on with this board?

Thanks for your help.

Basman

[Bjørn Kvaale]

Have you tried a different usb cable or a different usb port? What happens when you write nrfjprog -i in a command prompt. Can you see a number? Is the LED5 next to the interface MCU (the biggest chip) on the 91 DK blinking or is it on constantly? Also, it may help to restart your computer. I have noticed this sometimes on Windows 10 & restarting the computer normally fixes things.

[Tatus]

what when LED5 is blinking? Because i have this issue :/