Roles

Roles are defined by instantiating a service client. The same role can be referenced multiple times, and runtime makes sure not to assign multiple roles to the same service instance.

const btnA = new ds.Button()
const btnB = new ds.Button()
const pot = new ds.Potentiometer()
const lamp = new ds.LightBulb()

You can check if role is currently assigned, and react to it being assigned or unassigned:

const heater = new ds.Relay()
if (heater.isBound)
    heater.enabled.write(true)
heater.onConnected(() => {
    // ...
})
heater.onDisconnected(() => {
    // ...
})