Mastering Internet of Things

Returning writable values

In the general case, some momentary values might correspond to control parameters in an actuator. To highlight this, an overload exists for the field constructors, allowing the application to signal which one of the fields is "writable", or which ones correspond to control parameters with the same name. In our actuator, we report our output value as a writable parameter, by appending a Boolean argument to the value true:

if (this.output.HasValue) 
{ 
Fields.Add(new BooleanField(ThingReference.Empty, Now, 
"Output", this.output.Value, 
FieldType.Momentary, FieldQoS.AutomaticReadout, true)); 
}