# core services to serve iot devices.

- **mqttaccess**: mqtt access service which accepts device mqtt connections. 
- **httpaccess**: device api service which offers device http apis like authentication, registration, etc.
- **devicemanager**: device info and status management.
- **controller**: logic and route service.
- **apiprovidor**: http apis for applications, and notify device status changes to applications.
- **registry**: service that keep global configuration and info.