IoT Platform:Run logs

Device logs

The following logs are generated on the device.

• Connection logs:

  The following log confirms a successful device connection to IoT Platform.

  [1583135792.733][LK-0313] MQTT user calls aiot_mqtt_connect api, connect
  [1583135792.733][LK-0317] LightSwitch&a18wP******
  [1583135792.733][LK-0318] 3FC4A3DED5AC5F31C4969CBB1868758B17FAB2E5070FC51C9880910472******
  [1583135792.733][LK-0319] a18wP******.LightSwitch|timestamp=2524608000000,_ss=1,_v=sdk-c-4.0.0,securemode=2,signmethod=hmacsha256,ext=1,|
  establish mbedtls connection with server(host='a18wP******.iot-as-mqtt.cn-shanghai.aliyuncs.com', port=[443])
  success to establish mbedtls connection, fd = 6(cost 44763 bytes in total, max used 47675 bytes)
  [1583135792.888][LK-0313] MQTT connect success in 147 ms
  AIOT_MQTTEVT_CONNECT

• Topic subscription logs:

  To broadcast to all devices of a product, each device must subscribe to the topic. For example, when a device subscribes to /broadcast/a18wP******/test, it returns the following log.

  [1624933980.266][LK-0309] sub: /broadcast/a18wP******/test
  suback, res: -0x0000, packet id: 1, max qos: 1

• Broadcast message logs

  • Broadcast to a specific topic

    Call PubBroadcast to send a message with payload helloworld to topic /broadcast/a18wP******/test. The device receives the following log.

    [1624934078.899][LK-0309] pub: /broadcast/a18wP******/test
    [LK-030A] < 68 65 6C 6C 6F 77 6F 72  6C 64                   | helloworld
    pub, qos: 0, topic: /broadcast/a18wP******/test
    pub, payload: helloworld

  • Broadcast to multiple devices

    Call PubBroadcast to send a message with payload helloworld to all online devices of a product. The device receives the following log.

    • Log information

      [1624934109.099][LK-0309] pub: /sys/a18wP******/LightSwitch/broadcast/request/1409701944049******
      [LK-030A] < 68 65 6C 6C 6F 77 6F 72  6C 64                   | helloworld
      pub, qos: 1, topic: /sys/a18wP******/LightSwitch/broadcast/request/1409701944049******
      pub, payload: helloworld

    • Log description

      In the log, /sys/a18wP******/LightSwitch/broadcast/request/1409701944049****** is the topic for the broadcast message request, and 1409701944049****** is the message ID. This topic format is defined in broadcast communication.

IoT Platform logs

Log in to the IoT Platform console. In the left-side navigation pane, choose Monitoring and O&M > Simple Log Service, and then select a product to view the communication logs for your device.

The Log Service page has four tabs: cloud-side run log, local device log, message trace, and log ingestion. On the cloud-side run log tab, filter by DeviceName, TraceID, Keywords/message ID, Status, or Time Range. The log list shows Time, TraceID, Message Content, DeviceName, Business Type, Operation, Content, and Status.