IoT Platform:View logs

Prerequisites

A sample program that is written based on Link SDK for C is configured and run. For more information, see Example.

Device logs

You can view the execution result on the device.

1. View connection logs.

   If the following logs are generated, a connection between the device and IoT Platform is established:

   [1680608104.988][LK-0313] MQTT user calls aiot_mqtt_connect api, connect
   [1680608104.988][LK-032A] mqtt host: a18wP******.iot-as-mqtt.cn-shanghai.aliyuncs.com
   [1680608104.988][LK-0317] user name: LightSwitch&a18wP*******
   [1680608104.988][LK-0318] password: 4CEB5BA5B334CDB73DAAEEF97EBC1A09*******************
   success to establish tcp, fd=3
   local port: 34624
   [1680608104.999][LK-1000] establish mbedtls connection with server(host='a18wP*******.iot-as-mqtt.cn-shanghai.aliyuncs.com', port=[1883])
   [1680608105.066][LK-1000] success to establish mbedtls connection, (cost 45329 bytes in total, max used 48297 bytes)
   [1680608105.099][LK-0000] MQTT_PROP_ID_RECEIVE_MAXIMUM:10 
   [1680608105.099][LK-0000] MQTT_PROP_ID_TOPIC_ALIAS_MAXIMUM:20 
   [1680608105.099][LK-0000] MQTT_PROP_ID_MAXIMUM_QOS:1 
   [1680608105.099][LK-0000] MQTT_PROP_ID_RETAIN_AVAILABLE:1 
   [1680608105.099][LK-0000] MQTT_PROP_ID_MAXIMUM_PACKET_SIZE:262144 
   [1680608105.099][LK-0000] MQTT_PROP_ID_WILDCARD_SUBSCRIPTION_AVAILABLE:1 
   [1680608105.099][LK-0000] MQTT_PROP_ID_SUBSCRIPTION_IDENTIFIERS_AVAILABLE:0 
   [1680608105.099][LK-0000] MQTT_PROP_ID_SHARED_SUBSCRIPTION_AVAILABLE:1 
   [1680608105.099][LK-0000] MQTT_PROP_ID_SESSION_EXPIRY_INTERVAL:0 
   [1680608105.099][LK-0000] MQTT_PROP_ID_SERVER_KEEP_ALIVE:1200 
   [1680608105.099][LK-0313] MQTT connect success in 116 ms

2. View logs about topic subscription.

   [1680608105.099][LK-0309] sub: /sys/a18wP******/LightSwitch/thing/event/property/post_reply

3. View logs about message sending.

   [1680608105.099][LK-0309] pub: /sys/a18wP******/LightSwitch/thing/event/property/post
   
   [LK-030A] > 7B 22 69 64 22 3A 22 31  22 2C 22 76 65 72 73 69 | {"id":"1","versi
   [LK-030A] > 6F 6E 22 3A 22 31 2E 30  22 2C 22 70 61 72 61 6D | on":"1.0","param
   [LK-030A] > 73 22 3A 7B 22 4C 69 67  68 74 53 77 69 74 63 68 | s":{"LightSwitch
   [LK-030A] > 22 3A 30 7D 7D   

IoT Platform logs

You can log on to the IoT Platform console to view the device status and operation logs.

• Device status

  In the left-side navigation pane, choose Devices > Devices. Then, find the device and view the device status. If the value in the State/Enabled column is Online, the device is connected to IoT Platform.

• Operation logs

  In the left-side navigation pane, choose Maintenance > Device Log. Select a product to view the logs of the device that are generated when the device goes online, subscribes to the topic, and submits data to IoT Platform.