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3. Optional: Bind the devices to the gateway. When using the MQTT bridge, you only need to bind the devices if they can't generate their JWTs.
4. Optional: Subscribe to the system error topic to get feedback on whether device operations are successful.
5. Attach the devices to the gateway.
6. Use the gateway to relay telemetry, device state, and configuration messages on its devices' behalf.
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To enable the gateway to proxy device communications with ClearBlade IoT Core, have the gateway publish a QoS 1 /devices/{device_ID_to_attach}/attach control message over the MQTT bridge.
If you configured the gateway to authenticate devices using the devices' JWTs, the attached message’s payload must include the token in JSON format: { "authorization" : "{JWT_token}" }. Otherwise, ClearBlade IoT Core authenticates the device by checking its gateway’s association.
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