Plugin for "LocationDevice"

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I would like to write an plugin for something called ‘LocationDevice’.
Such a LocationDevice should hold attributes like 'LinearDistance", “ETA”… etc.
The attributes should be updated through the Pimatic API.

How to do this? I read the plugin howto but if i understand the howto and the plugin template correctly i need to define a getter function for each attribute of the device i declare. But because i want to push the values through the api i do not need, as far as i understand, any getters.
How to do this the right way?

The getters are used by the framework to get the value of the attributes from you device.

So you need to implement a getter for each attribute that returns its value. Because you don’t want to request the value from you android device (else a reverse connection would be needed) you can simply save the values to local properties of your device and return the saved values:

class LocationDevice extends env.devices.Device
 
  attributes:
    distance:
     description: "the distance"
      type: "number"
      unit: 'km'
 
  getDistance: -> Promise.resolve(@_distance)

To have an api end point you can simply add a action for setting for example the distance. This action is automatically exposed as HTTP-API:

[...]
  actions: 
    updateDistance:
      description: "updates the distance, called from your android device"
      params:
        distance:
          type: "number"

    updateDistance: (distance) -> 
      @_distance = distance
      return Promise.resolve()

You can now call the updateDistance-action via HTTP-REQUEST:

GET yourPi/api/device/deviceName/updateDistance?distance=100

Note that @_distance is just a shorthand for this._distance. If you need further help, push the code to github and ping me there.

@sweetpi thx for your help. This works for me. If i have any further questions i will ping you on github.