After you use the sample code to connect a device to IoT Platform over Message Queuing Telemetry Transport (MQTT), you can view logs on the device.
Prerequisites
For more information, see Example.
Device logs
You can view the running result on the device.
Device connection logs
The following log data indicates that the device is connected to IoT Platform.[1626837529.388][LK-0313] MQTT user calls aiot_mqtt_connect api, connect [1626837529.388][LK-0317] LightSwitch&a18wP****** [1626837529.388][LK-0318] 6431725347995DC4FB7A24CC58FD297EEB6C712FC8662F88E54C8F23C0****** core_sysdep_network_establish host iot-06******.mqtt.iothub.aliyuncs.com port 443, type 0 establish tcp connection with server(host='iot-06******.mqtt.iothub.aliyuncs.com', port=[443]) success to establish tcp, fd=3 local port: 39072 [1626837529.422][LK-1000] establish mbedtls connection with server(host='iot-06******.mqtt.iothub.aliyuncs.com', port=[443]) [1626837529.488][LK-1000] success to establish mbedtls connection, (cost 44947 bytes in total, max used 47859 bytes) [1626837529.544][LK-0313] MQTT connect success in 161 ms AIOT_MQTTEVT_CONNECTLogs generated when the device requests remote configuration information
[1626837529.544][LK-0309] pub: /sys/a18wP******/LightSwitch/thing/config/get [LK-030A] > 7B 22 69 64 22 3A 22 31 32 33 22 2C 22 70 61 72 | {"id":"123","par [LK-030A] > 61 6D 73 22 3A 7B 22 63 6F 6E 66 69 67 53 63 6F | ams":{"configSco [LK-030A] > 70 65 22 3A 22 70 72 6F 64 75 63 74 22 2C 22 67 | pe":"product","g [LK-030A] > 65 74 54 79 70 65 22 3A 22 66 69 6C 65 22 7D 7D | etType":"file"}}Logs generated when IoT Platform returns a response message
[1626837529.622][LK-0309] pub: /sys/a18wP******/LightSwitch/thing/config/get_reply [LK-030A] < 7B 22 63 6F 64 65 22 3A 32 30 30 2C 22 64 61 74 | {"code":200,"dat [LK-030A] < 61 22 3A 7B 22 63 6F 6E 66 69 67 49 64 22 3A 22 | a":{"configId":" [LK-030A] < 66 36 35 32 31 65 66 64 33 31 66 39 34 31 37 61 | f6521efd31f9417a [LK-030A] < 62 63 37 38 30 38 39 66 34 63 37 38 62 36 38 36 | bc78089f4c****** [LK-030A] < 22 2C 22 63 6F 6E 66 69 67 53 69 7A 65 22 3A 39 | ","configSize":9 [LK-030A] < 33 34 2C 22 67 65 74 54 79 70 65 22 3A 22 66 69 | 34,"getType":"fi [LK-030A] < 6C 65 22 2C 22 73 69 67 6E 22 3A 22 63 39 36 34 | le","sign":"c964 [LK-030A] < 34 65 62 32 63 39 64 36 34 38 38 39 34 32 65 32 | 4eb2c9d6488942e2 [LK-030A] < 61 37 66 30 32 38 38 38 32 66 38 30 38 39 30 39 | a7f028882f808909 [LK-030A] < 32 62 32 31 31 39 33 63 35 39 63 34 34 65 36 62 | 2b21193c59c44e6b [LK-030A] < 36 32 65 63 37 38 63 38 39 36 64 39 22 2C 22 73 | 62ec78******","s [LK-030A] < 69 67 6E 4D 65 74 68 6F 64 22 3A 22 53 68 61 32 | ignMethod":"Sha2 [LK-030A] < 35 36 22 2C 22 75 72 6C 22 3A 22 68 74 74 70 73 | 56","url":"https [LK-030A] < 3A 2F 2F 6F 74 78 2D 64 65 76 69 63 65 63 65 6E | ://otx-devicecen [LK-030A] < 74 65 72 2D 74 68 69 6E 67 2D 63 6F 6E 66 69 67 | ter-thing-config [LK-030A] < 2D 63 6E 2D 73 68 61 6E 67 68 61 69 2D 6F 6E 6C | -cn-shanghai-onl [LK-030A] < 69 6E 65 2E 6F 73 73 2D 63 6E 2D 73 68 61 6E 67 | ine.oss-cn-shang [LK-030A] < 68 61 69 2E 61 6C 69 79 75 6E 63 73 2E 63 6F 6D | hai.aliyuncs.com [LK-030A] < 2F 67 37 68 30 33 32 4B 57 57 49 37 2F 74 68 69 | /a1wP******/thi [LK-030A] < 6E 67 43 6F 6E 66 69 67 2F 31 36 32 36 37 37 38 | ngConfig/1626778 [LK-030A] < 37 30 33 38 33 32 5F 4B 7A 6B 51 76 77 58 34 3F | 703832_Kz******? [LK-030A] < 45 78 70 69 72 65 73 3D 31 36 32 36 38 33 39 33 | Expires=16268393 [LK-030A] < 32 39 26 4F 53 53 41 63 63 65 73 73 4B 65 79 49 | 29&OSSAccessKeyI [LK-030A] < 64 3D 4C 54 41 49 52 59 33 72 78 35 64 67 32 4A | d=LTAIRY3rx5**** [LK-030A] < 42 6D 26 53 69 67 6E 61 74 75 72 65 3D 37 5A 71 | **&Signature=7Zq [LK-030A] < 33 7A 50 31 70 4E 35 50 72 45 33 78 58 4F 56 49 | 3zP1pN5PrE3xXOVI [LK-030A] < 36 53 6E 69 35 4C 7A 38 25 33 44 22 7D 2C 22 69 | 6Sni5******"},"i [LK-030A] < 64 22 3A 22 31 32 33 22 2C 22 6D 65 74 68 6F 64 | d":"123","method [LK-030A] < 22 3A 22 74 68 69 6E 67 2E 63 6F 6E 66 69 67 2E | ":"thing.config. [LK-030A] < 67 65 74 22 2C 22 76 65 72 73 69 6F 6E 22 3A 22 | get","version":" [LK-030A] < 31 2E 30 22 7D | 1.0"} configId: f6521efd31f9417abc78089f4c******, configSize: 934 Bytes core_sysdep_network_establish host otx-devicecenter-thing-config-cn-shanghai-online.oss-cn-shanghai.aliyuncs.com port 443, type 0 establish tcp connection with server(host='otx-devicecenter-thing-config-cn-shanghai-online.oss-cn-shanghai.aliyuncs.com', port=[443]) success to establish tcp, fd=4 local port: 58534Logs generated when the device downloads a configuration file
[1626837529.688][LK-1000] establish mbedtls connection with server(host='otx-devicecenter-thing-config-cn-shanghai-online.oss-cn-shanghai.aliyuncs.com', port=[4 [1626837529.755][LK-1000] success to establish mbedtls connection, (cost 47240 bytes in total, max used 49896 bytes) [1626837529.755][LK-040B] > GET /a1wP******/thingConfig/1626778703832_Kz******?Expires=1626839329&OSSAccessKeyId=LTAIRY3rx5******&Signature=7Zq3zP1pN5PrE****** [1626837529.755][LK-040B] > Host: otx-devicecenter-thing-config-cn-shanghai-online.oss-cn-shanghai.aliyuncs.com [1626837529.755][LK-040B] > Accept: text/html, application/xhtml+xml, application/xml;q=0.9, */*;q=0.8 [1626837529.755][LK-040B] > Range: bytes=0- [1626837529.755][LK-040B] > Content-Length: 0 [1626837529.755][LK-040B] > [1626837529.755][LK-0309] pub: /ota/device/progress/a1wP******/LightSwitch [LK-030A] > 7B 22 69 64 22 3A 31 2C 20 22 70 61 72 61 6D 73 | {"id":1, "params [LK-030A] > 22 3A 7B 22 73 74 65 70 22 3A 22 30 22 2C 22 64 | ":{"step":"0","d [LK-030A] > 65 73 63 22 3A 22 22 7D 7D | esc":""}} [1626837529.811][LK-040D] < HTTP/1.1 206 Partial Content [1626837529.811][LK-040D] < Server: AliyunOSS [1626837529.811][LK-040D] < Date: Wed, 21 Jul 2021 03:18:49 GMT [1626837529.811][LK-040D] < Content-Type: application/octet-stream [1626837529.811][LK-040D] < Content-Length: 934 [1626837529.811][LK-040D] < Connection: keep-alive [1626837529.811][LK-040D] < x-oss-request-id: 60F792193D168E3232****** [1626837529.811][LK-040D] < Content-Range: bytes 0-933/934 [1626837529.811][LK-040D] < Accept-Ranges: bytes [1626837529.811][LK-040D] < ETag: "BA0DD9490DFE76245C9B5F4C48******" [1626837529.811][LK-040D] < Last-Modified: Tue, 20 Jul 2021 10:58:23 GMT [1626837529.811][LK-040D] < x-oss-object-type: Normal [1626837529.811][LK-040D] < x-oss-hash-crc64ecma: 5008746007206****** [1626837529.811][LK-040D] < x-oss-storage-class: Standard [1626837529.811][LK-040D] < Content-MD5: ug3ZSQ3+diRcm19M******== [1626837529.811][LK-040D] < x-oss-server-time: 56 [1626837529.811][LK-040D] < [1626837529.811][LK-0901] digest matched [1626837529.811][LK-0309] pub: /ota/device/progress/a1wP******/LightSwitch [LK-030A] > 7B 22 69 64 22 3A 32 2C 20 22 70 61 72 61 6D 73 | {"id":2, "params [LK-030A] > 22 3A 7B 22 73 74 65 70 22 3A 22 31 30 30 22 2C | ":{"step":"100", [LK-030A] > 22 64 65 73 63 22 3A 22 22 7D 7D | "desc":""}} config len is 934, config content is {"configId":"123dagdah","configSize":1234565,"sign":"123214adfadgadg","signMethod":"Sha256","url":"https://iotx-config.oss-cn-shanghai.aliyuncs.com/nopoll_0.4.4.tar.gz?Expires=1502955804&OSSAccessKeyId=**************&Signature=XfgJu7P6DWWejstKJgXJEH0q******&security-token=CAISuQJ1q6Ft5B2yfSjIpK6MGsyN1Jx5jo6mVnfBglIPTvlvt5D50Tz2IHtIf3NpAusdsv03nWxT7v4flqFyTINVAEvYZJOPKGrGR0DzDbDasumZsJbo4f%2FMQBqEaXPS2MvVfJ%2BzLrf0ceusbFbpjzJ6xaCAGxypQ12iN%2B%2Fr6%2F5gdc9FcQSkL0B8ZrFsKxBltdUROFbIKP%2BpKWSKuGfLC1dysQcO1wEP4K%2BkkMqH8Uic3h%2Boy%2BgJt8H2PpHhd9NhXuV2WMzn2%2FdtJOiTknxR7ARasaBqhelc4zqA%2FPPlWgAKvkXba7aIoo01fV4jN5JXQfAU8KLO8tRjofHWmojNzBJAAPpYSSy3Rvr7m5efQrrybY1lLO6iZy%2BVio2VSZDxshI5Z3McKARWct06MWV9ABA2TTXXOi40BOxuq%2B3JGoABXC54TOlo7%2F1wTLTsCUqzzeIiXVOK8CfNOkfTucMGHkeYeCdFkm%2FkADhXAnrnGf5a4FbmKMQph2cKsr8y8UfWLC6IzvJsClXTnbJBMeuWIqo5zIynS1pm7gf%2F9N3hVc6%2BEeIk0xfl2tycsUpbL2FoaGk6BAF8hWSWYUXsv59d******","getType":"file"} [1626837529.811][LK-1000] adapter_network_deinit
IoT Platform logs
Log on to the IoT Platform console to view the device status and operation logs.
Device status
In the left-side navigation pane, choose . 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.
Logs about remote configuration
In the left-side navigation pane, choose . Select a product to Select a product to view the logs that are generated when the device requests remote configuration information, downloads a remote configuration file, and then submits the downloading progress.