Types of services
As explained in the service page, Luos enables message exchanges between services in a straightforward way for developers. Still, to easily use a service you need to know their interfaces or how to interact with them.
In your code, in order to know what are the capabilities and the purpose of any services of your product, you need to know their types.
Standard interface between services
Types allow to define the interface of a service. Types create a common API between services.
The following example uses the most straightforward type available in Luos: STATE_TYPE defines the capability to manage state messages format. With this information, each application that wants to send a message to the LED driver knows how to communicate with this service; it only has to put the state information, and the LED can then be controlled.
To define the capabilities of a specific type, you can use or create profiles. Profiles are API definitions that can be applied to a service.
List of all supported services' type
| ID | Type | Description |
|---|---|---|
| 0 | VOID_TYPE | A service doing nothing, it allows you to detect a board with no running service on it. |
| 1 | GATE_TYPE | The gate service allows to translate JSON to Luos and Luos to JSON constantly. This service continuously pulls data from the sensors detected on the network and streams it into a JSON format. Also, it can receive JSON data and convert it into a service command. |
| 2 | COLOR_TYPE | The Color service handles an RGB color data. |
| 3 | ANGLE_TYPE | The Angle service handles a rotation position value. |
| 4 | STATE_TYPE | The State service can handles a sensor (Button board for example), or an actuator (Power Switch board for example). Generally, this type of services allows to manage bi-state elements such as on/off, pushed/release, 0/1, ... |
| 5 | DISTANCE_TYPE | The Distance service handles a sensor measuring a distance. |
| 6 | VOLTAGE_TYPE | The Voltage service handles a sensor measuring voltage. |
| 7 | IMU_TYPE | The Imu service handles an inertial sensor. |
| 8 | LIGHT_TYPE | The Light service handles a sensor measuring a light intensity. |
| 9 | LOAD_TYPE | The Load service handles a sensor measuring a force. |
| 10 | PIPE_TYPE | A communication service with the external world. |
| 11 | MOTOR_TYPE | An universal motor handling speed, position, and torque control, limits and measurement. |
| 12 | SERVO_MOTOR_TYPE | The Servo service allows to drive RC elements like servomotor. |
| 13 | INSPECTOR_TYPE | A service allowing an external program to take control and inspect an embedded Luos network through a PIPE service. |
| 14 | LUOS_LAST_TYPE | This is not an actual type this is the beginning of the user specific type space. |