Access Connection Information
1. Access the Connection Information
In the list, click the device name created in previous step to enter the detailed page of the device. Locate 「DeviceSecret」field in connection information banner, and click the small eye icon on the right to view the connection information, including IoTCoreId, DeviceKey and DeviceSecret.
2. Generate MQTT Connection Information
Use [Specified Algorithm](https://cloud.baidu.com/doc/IoTCore/s/Akck4811r#generate-mqtt-username and password (device key authentication)) to generate connection information; in quick experience, the online generator can also be used, open MQTT Connection Information Generator, and use IoTCoreId、DeviceKey and DeviceSecret to generate the username and password required by MQTT connection.
MQTT can be connected by three mode including TCP, TLS/SSL and WSS, and the corresponding ports are shown as follows:
| Protocol | Port | Description |
|---|---|---|
| TCP | 1883 | Unencrypted MQTT connection |
| TLS/SSL | 1884 | Encrypted MQTT connection based on TLS |
| WSS | 443 | MQTT connection based on WebSocket and TLS |
Select based on the actual scenario during the use