Plan the integration first, then build firmware against the Realer API documentation. API Docs define the exact OAuth client-credentials authentication, runtime, catalog, feed-data, MQTT payload, field, and response-code contracts.
Use the integration planning guide to confirm the runtime path: HTTPS polling or MQTT broker messaging over TLS. Then use the API Docs getting started page when you are ready to implement.
How do I get control device API keys on Realer?
How do I plan a Realer control-device integration?
How do I design commands, sensors, and feed data?
How do I test control-device firmware safely?
How should firmware handle Realer API failures?
How do I register as a developer of control devices on Realer?