China Telecom IOT SIM can"t connect the nrf cloud.

[xinjiang]

Hi!

I'm trying to run Asset-Tracker routine with 9160dk to connect to the NRF cloud(ncs1.3.0). The China Telecom can't connect the nrf cloud, China Mobile can connect normally.

I'm in Shenzhen, China. The NB-IoT work here. The serial port displays an error say Failed to connect to cloud, error -3. LED 1 and LED 4 blinking: Communication error with the nRF Cloud.

[00:00:14.686,309] <inf> asset_tracker: Connected to LTE network.
[00:00:14.692,871] <inf> asset_tracker: Connecting to cloud, attempt 1 of 8
[00:00:14.700,286] <inf> asset_tracker: Cloud connection request sent.
[00:00:14.707,244] <inf> asset_tracker: Connection response timeout is set to 30 seconds.
[00:00:14.715,942] <inf> asset_tracker: CLOUD_EVT_CONNECTING
[00:00:38.738,586] <dbg> nrf_cloud_transport.nct_connect: getaddrinfo failed -11
[00:00:38.746,368] <inf> asset_tracker: CLOUD_EVT_CONNECTING
[00:00:38.752,471] <err> asset_tracker: Failed to connect to cloud, error -3
[00:00:38.760,192] <err> asset_tracker: Network error, check cloud configuration
[00:00:38.768,249] <err> asset_tracker: Device will reboot in 300 seconds
[00:00:38.775,726] <err> asset_tracker: LTE link disconnect

Error -3 is Network problems.

/**@brief Cloud connect results. */
enum cloud_connect_result {
	CLOUD_CONNECT_RES_SUCCESS = 0,

	CLOUD_CONNECT_RES_ERR_NOT_INITD = -1,
	CLOUD_CONNECT_RES_ERR_INVALID_PARAM = -2,
	CLOUD_CONNECT_RES_ERR_NETWORK = -3,
	CLOUD_CONNECT_RES_ERR_BACKEND = -4,
	CLOUD_CONNECT_RES_ERR_MISC = -5,
	CLOUD_CONNECT_RES_ERR_NO_MEM = -6,
	/* Invalid private key */
	CLOUD_CONNECT_RES_ERR_PRV_KEY = -7,
	/* Invalid CA or client cert */
	CLOUD_CONNECT_RES_ERR_CERT = -8,
	/* Other cert issue */
	CLOUD_CONNECT_RES_ERR_CERT_MISC = -9,
	/* Timeout, SIM card may be out of data */
	CLOUD_CONNECT_RES_ERR_TIMEOUT_NO_DATA = -10,
	CLOUD_CONNECT_RES_ERR_ALREADY_CONNECTED = -11,
};

Here is my pri.conf. I changed  LTE link control. 

# LTE link control
CONFIG_POWER_OPTIMIZATION_ENABLE=n
CONFIG_LTE_LINK_CONTROL=y
#CONFIG_LTE_NETWORK_MODE_LTE_M_GPS=y
CONFIG_LTE_NETWORK_MODE_NBIOT_GPS=y
CONFIG_LTE_NETWORK_MODE_NBIOT=y
CONFIG_LTE_AUTO_INIT_AND_CONNECT=n
CONFIG_LTE_LINK_CONTROL_LOG_LEVEL_DBG=y
CONFIG_LTE_LEGACY_PCO_MODE=y
CONFIG_LTE_PSM_REQ_RPTAU="00000110"
CONFIG_LTE_PSM_REQ_RAT="00000010"

I'm not sure why this is happening. How to solve this problem?

Thanks!

[Simonr]

Hi

Did you also enable :option:`CONFIG_ZZHC`  in Kconfig, and added the necessary dependencies to your project?

Please note that we're entering the summer vacation period here in Norway, so delays must be expected as we are low on staff for the month of July. Sorry about the inconvenience!

Best regards,

Simon

[xinjiang]

I added the following configuration in the Kconfig file under the asset_tracker folder, but it still hasn't been resolved.

config ZZHC
    	bool "Self-Registration Daemon"
    	select BSD_LIBRARY
    	select SETTINGS
   	    select AT_CMD
    	select AT_CMD_PARSER
    	select AT_NOTIF
    	select BASE64
    	select JSON_LIBRARY
    	depends on TRUSTED_EXECUTION_NONSECURE

[Simon]

I am sorry for the late reply. Currently, a huge portion of the support team is on summer vacation (including many of the nRF9160 experts), so you may experience delayed answers. I will look into your issue in the upcoming days.

Best regards,

Simon

[Simon]

I can see that you are getting help with this issue in this ticket, should I close this?

[xinjiang]

I have been using a China Mobile IOT SIM. I still haven't solved the problem that China Telecom can't connect to the cloud. You can close this. I'll try to solve this some other time.