Unable to connect to Cloud using Asset Tracker on nRF9160 DK

[AlbertSerica]

Hello, I am currently learning to use nRF9160 DK in Guangzhou, China. 

It is weird that my China Mobile cellphone SIM card can be used on this DK to connect to Cloud. However, iBasics SIM and China Telecom NBIOT SIM cannot connect to Cloud. 

While using iBasics, it's LED3 that keeps blinking. While using China Telecom, LED3 blinks first, then LED4 blinks, LED1 and LED4 blinks at last.

The following is from nRF Connect during the entire session for China Telecom

+CSCON: 1

 

 

[00:00:08.419,586]

[0m<inf> asset_tracker: RRC mode: Connected

[0m

 

 

+CEREG: 1,"765E","075D6450",9,,,"11100000","00111000"

 

 

[00:00:10.095,031]

[0m<inf> asset_tracker: Connected to LTE network.

[0m

 

 

[00:00:10.101,623]

[0m<inf> asset_tracker: Connecting to cloud, attempt 1 of 8

[0m

 

 

[00:00:10.109,039]

[0m<inf> asset_tracker: Cloud connection request sent.

[0m

 

 

[00:00:10.115,966]

[0m<inf> asset_tracker: Connection response timeout is set to 30 seconds.

[0m

 

 

[00:00:10.124,664]

[0m<inf> asset_tracker: Network registration status: Connected - home network

[0m

 

 

[00:00:10.133,544]

[0m<inf> asset_tracker: PSM parameter update: TAU: 86400, Active time: -1

[0m

 

[00:00:10.142,242]

[0m<dbg> nrf_cloud.api_event_handler: NRF_CLOUD_EVT_TRANSPORT_CONNECTING

[0m

 

 

[00:00:10.150,695]

[0m<inf> asset_tracker: CLOUD_EVT_CONNECTING

[0m

 

 

[00:00:20.343,505]

[0m<dbg> nrf_cloud_transport.nct_connect: IPv4 address: 54.166.31.114

[0m

 

 

[00:00:20.351,715]

[0m<dbg> nrf_cloud_transport.nct_mqtt_connect: MQTT clean session flag: 0

[0m

 

 

[00:00:25.044,555]

[1;33m<wrn> date_time: sntp_query, error: -116

[0m

 

 

[00:00:32.817,443]

[1;33m<wrn> date_time: sntp_query, error: -116

[0m

 

 

[00:00:38.944,549]

[1;33m<wrn> date_time: sntp_query, error: -116

[0m

 

[00:00:44.977,661]

[1;33m<wrn> date_time: sntp_query, error: -116

[0m

 

 

[00:00:51.057,739]

[1;33m<wrn> date_time: sntp_query, error: -116

[0m

 

 

[00:00:51.064,270]

[1;33m<wrn> date_time: Not getting time from any NTP server

[0m

 

 

[00:00:51.072,357]

[0m<inf> asset_tracker: DATE_TIME_OBTAINED_MODEM

[0m

 

 

+CSCON: 0

 

 

[00:01:16.166,137]

[0m<inf> asset_tracker: RRC mode: Idle

[0m

 

 

+CSCON: 1

 

 

[00:01:21.380,767]

[0m<inf> asset_tracker: RRC mode: Connected

[0m

 

 

+CSCON: 0

 

 

[00:01:43.162,567]

[0m<inf> asset_tracker: RRC mode: Idle

[0m

 

 

+CSCON: 1

 

 

[00:02:13.541,534]

[0m<inf> asset_tracker: RRC mode: Connected

[0m

 

 

+CSCON: 0

 

 

[00:02:35.173,370]

[0m<inf> asset_tracker: RRC mode: Idle

[0m

 

 

[00:03:00.723,693]

[0m<dbg> nrf_cloud_transport.nct_mqtt_connect: mqtt_connect failed -22

[0m

 

 

[00:03:00.732,025]

[0m<dbg> nrf_cloud.api_event_handler: NRF_CLOUD_EVT_TRANSPORT_CONNECTING

[0m

 

 

[00:03:00.740,509]

[0m<inf> asset_tracker: CLOUD_EVT_CONNECTING

[0m

 

 

[00:03:00.746,582]

[1;31m<err> asset_tracker: Failed to connect to cloud, error -7

[0m

 

 

[00:03:00.754,333]

[1;31m<err> asset_tracker: Ensure device has a valid private key

[0m

 

 

[00:03:00.762,145]

[1;31m<err> asset_tracker: Device will reboot in 300 seconds

[0m

 

 

[00:03:00.769,653]

[1;31m<err> asset_tracker: LTE link disconnect

[0m

 

 

+CSCON: 1

 

 

[00:03:01.222,259]

[0m<inf> asset_tracker: RRC mode: Connected

[0m

 

 

+CEREG: 0,"765E","075D6450",9,0,0,"11100000","11100000"

 

 

+CSCON: 0

 

 

[00:03:06.757,415]

[0m<inf> asset_tracker: RRC mode: Idle

[0m

 

 

[00:03:07.170,684]

[1;31m<err> asset_tracker: Shutdown modem

[0m

[AlbertSerica]

I tried to configure ZZHC in asset_tracker, but still not working and only LED3 is blinking:

*** Booting Zephyr OS build v2.4.99-ncs2  ***
[00:00:00.212,280] [0m<inf> asset_tracker: Asset tracker started[0m
[00:00:00.218,444] [0m<inf> watchdog: Watchdog timeout installed. Timeout: 60000[0m
[00:00:00.225,952] [0m<inf> watchdog: Watchdog started[0m
[00:00:00.231,262] [0m<inf> watchdog: Watchdog feed enabled. Timeout: 30000[0m
[00:00:00.239,044] [0m<dbg> nrf_cloud_transport.nct_settings_set: Settings key: p_sesh, size: 4[0m
[00:00:00.247,863] [0m<dbg> nrf_cloud_transport.nct_settings_set: Read setting val: 1[0m
[00:00:00.262,878] [0m<dbg> nrf_cloud_transport.nct_client_id_get: client_id = nrf-352656100109613[0m
[00:00:00.271,972] [0m<dbg> nrf_cloud_transport.nct_topics_populate: shadow_base_topic: $aws/things/nrf-352656100109613/shadow[0m
[00:00:00.283,538] [0m<dbg> nrf_cloud_transport.nct_topics_populate: accepted_topic: nrf-352656100109613/shadow/get/accepted[0m
[00:00:00.294,921] [0m<dbg> nrf_cloud_transport.nct_topics_populate: rejected_topic: $aws/things/nrf-352656100109613/shadow/get/rejected[0m
[00:00:00.307,342] [0m<dbg> nrf_cloud_transport.nct_topics_populate: update_delta_topic: $aws/things/nrf-352656100109613/shadow/update/delta[0m
[00:00:00.320,129] [0m<dbg> nrf_cloud_transport.nct_topics_populate: update_topic: $aws/things/nrf-352656100109613/shadow/update[0m
[00:00:00.331,848] [0m<dbg> nrf_cloud_transport.nct_topics_populate: shadow_get_topic: $aws/things/nrf-352656100109613/shadow/get[0m
[00:00:00.343,688] [0m<inf> asset_tracker: Connecting to LTE network.[0m
[00:00:00.350,280] [0m<inf> asset_tracker: This may take several minutes.[0m
+CEREG: 2,"FFFE","FFFFFFFF",7,0,0,"11100000","11100000"
[00:00:58.980,285] [0m<inf> asset_tracker: LTE cell changed: Cell ID: -1, Tracking area: 65534
[0m