Connection to LTE network

[ctchong]

Hi, 

I just got the nRF9160 dk and managed to register on the network following the tutorial. However, I tried to turn it on the next day and it doesn't connect to the network. I tried to check the nRF cloud dashboard to see the data usage but can't find any button on the website. There isn't a "buy more data" button as well as specified on the https://devzone.nordicsemi.com/b/nrf9160-development-status/posts/ibasis-global-access-for-things-frequently-asked-questions-faq

Please help. 

Thank you 

Best regards,

Chong 

[Cole Hafner]

Hi ctchong

Are you able to see a data usage metric on the device page (the one that you registered the SIM card with)? If not, that could mean your device isn't linked to your SIM. You could try to delete the device and re-add it. 

If all else fails, please DM me the ICCID of the SIM. 

Thank you.

Cole

[ctchong]

Hi Cole, 

I'm getting the following when I use the LTE Link Monitor program. 

LTE LC config ...

[00:00:01.054,016] 

[1;31m<err> net_if.net_if_init: There is no network interface to work with!

[0m

AT+CFUN?

Is this normal? or is my board faulty?

Thank you 

Best regards,

Chong

[Håkon Alseth]

Hi,

 

If you have an older version of the at_client FW on your device, you will see this error message pop up. You can safely ignore that specific print out.

Does the rest of the at_client application not run properly? Are you able to register your SIM properly now?

Kind regards,

Håkon

[ctchong]

Hi I'm have deleted the device on the nrf cloud and tried to register again but am unable to do so. 

The at commands are not working and not getting any response. 

Application started

LTE LC config ...

[00:00:02.243,682] 

[1;31m<err> net_if.net_if_init: There is no network interface to work with!

[0m

AT+CFUN?

AT+COPS=?

log shows

Network search failed: Error: 'AT+COPS=? ' timed out

Do you need my sim card details to check if the data service is still valid? 

Thank you 

Best regards.

Chong 

[ctchong]

Dear All,

I managed to get it working but the connection keeps dropping. 

Just need to verify if it is a problem on the SIM card, Telco or chipset. 

When connection drops, it resets. 
NRF_CLOUD_EVT_TRANSPORT_DISCONNECTED is first seen,

Failed to send data to cloud: -5
***** Booting Zephyr OS v1.13.99-ncs2 *****

Then the 

Thank you 

Best regards,

Chong 

[Håkon Alseth]

Hi,

 

ctchong said:

I managed to get it working but the connection keeps dropping. 

Are you able to successfully run the at_client example, in combination with nRF Connect LTE Link Monitor?

If you are able to get a link using at_client + LTE Link Monitor, then your SIM card and network connection is working properly.

 

Kind regards,

Håkon

[ctchong]

Hi, 

The link is rather unstable. I'm using the LTE_BLE_gateway sample and it rarely reaches NRF_CLOUD_EVT_READY which I found that the GPS cannot be triggered as it hasn't been initialised yet. 

NRF_CLOUD_EVT_TRANSPORT_CONNECTED
Orientation: 1
Orientation: 3
trigger alarm
Alarm triggered !
1] Sending FLIP data.
0] Sending FLIP data.
Orientation: 0
NRF_CLOUD_EVT_TRANSPORT_DISCONNECTED
NRF_CLOUD_EVT_TRANSPORT_CONNECTED

The connection keeps dropping and causes a reboot. 

***** Booting Zephyr OS v1.13.99-ncs2 *****
Application started
[00:00:04.940,063] <err> bt_driver.h4_get_type: Unknown H:4 type 0x3e
[00:00:04.940,093] <err> bt_driver.h4_get_type: Unknown H:4 type 0x29
[00:00:04.947,174] <err> bt_driver.read_payload: Not enough space in buffer
ASSERTION FAIL [err == 0] @ D:/NordicSDK/ncs/zephyr/subsys/bluetooth/host/hci_core.c:272
k_sem_take failed with err -11

I see this occasionally too.