RE: AWS IoT library socket disconnection after one minute

Dominic — Fri, 18 Sep 2020 17:28:18 GMT

Switched from the included iBasis SIM to a Bell SIM and the problem disappears so it appears to be something at the carrier level. Will not be troubleshooting this any further for the time being.

RE: AWS IoT library socket disconnection after one minute

Dominic — Fri, 18 Sep 2020 16:53:40 GMT

Today I updated the modem firmare to v1.2.1 and tried running the aws iot example from the master branch, neither solved the issue. I did notice that the modem was switching between RRC idle and connected modes a few times so I decreased the keep-alive interval to keep the connection open. This also did not fix the issue. It is always 60 seconds between broker connection and disconnection.

*** Booting Zephyr OS build v2.3.0-rc1-ncs1-2409-g81abf77417fd  ***
[00:00:00.000,305] <err> board_nonsecure: AT socket could not be opened
[00:00:00.000,579] <err> board_nonsecure: thingy91_magpio_configure failed with error: -14
The AWS IoT sample started, version: v1.0.0
LTE cell changed: Cell ID: 30512907, Tracking area: 11651
PSM parameter update: TAU: -1, Active time: -1
RRC mode: Connected
Network registration status: Connected - roaming
DATE_TIME_OBTAINED_MODEM
AWS_IOT_EVT_CONNECTING
[00:00:05.418,365] <dbg> aws_iot.broker_init: IPv4 Address found 13.58.33.200
[00:00:09.063,110] <dbg> aws_iot.aws_iot_cloud_poll: AWS broker connection request sent.
[00:00:09.405,792] <inf> aws_fota: Created notify_next_topic $aws/things/nrf91-test/jobs/notify-next
[00:00:09.406,188] <inf> aws_fota: Created get_topic $aws/things/nrf91-test/jobs/$next/get/#
[00:00:09.406,494] <inf> aws_fota: previously subscribed to notify-next topic
[00:00:09.406,860] <inf> aws_jobs: Publish topic: $aws/things/nrf91-test/jobs/$next/get
[00:00:09.407,165] <inf> aws_jobs: Publish payload {"clientToken": ""}
[00:00:09.454,223] <dbg> aws_iot.mqtt_evt_handler: MQTT client connected!
AWS_IOT_EVT_CONNECTED
Persistent session enabled
Publishing: {
                "state":        {
                                                "reported":     {
                                                                                        "app_version":  "v1.0.0",
                                                                                                                                        "batv": 4093,
                                                                                                                                                                        "ts":   1600447218196
                                                                                                                                                                                                        }
                                                                                                                                                                                                                }
                                                                                                                                                                                                                 } to AWS IoT broker
[00:00:09.502,716] <dbg> aws_iot.aws_iot_send: Publishing to topic: $aws/things/nrf91-test/shadow/update
AWS_IOT_EVT_READY
[00:00:09.601,654] <dbg> aws_iot.mqtt_evt_handler: MQTT_EVT_PUBACK: id = 4244 result = 0
[00:00:09.610,595] <inf> aws_fota: Checking for an available job
[00:00:09.611,145] <inf> aws_fota: No queued jobs for this device
[00:01:05.726,165] <dbg> aws_iot.mqtt_evt_handler: MQTT_EVT_DISCONNECT: result = -128
AWS_IOT_EVT_DISCONNECTED
[00:01:06.226,623] <dbg> aws_iot.aws_iot_cloud_poll: Socket error: POLLNVAL
[00:01:06.226,867] <dbg> aws_iot.aws_iot_cloud_poll: The cloud socket was unexpectedly closed.
AWS_IOT_EVT_DISCONNECTED
RRC mode: Idle
RRC mode: Connected
Network registration status: Connected - roaming
RRC mode: Idle

RE: AWS IoT library socket disconnection after one minute

Sigurd — Fri, 18 Sep 2020 15:13:24 GMT

Hi,

[quote user=""]I am testing out the AWS IoT library in version 1.3.1 of nrf Connect SDK[/quote]

There has been a lot of work done to the AWS IoT library since v1.3.x, there is now also a dedicated aws_iot sample for this library on the master branch.

Please test with the master branch, and see if that solves the issue. I also recommend testing with the latest modem firmware, v.1.2.1