Mirroring Hue lights by watching Lutron integration local-hub

hue-lutron.go

package main

import (
	"log"

	"github.com/heatxsink/go-hue/groups"
	"github.com/heatxsink/go-hue/lights"
	"github.com/heatxsink/go-hue/portal"
	lutronlib "github.com/ptone/go-lutron"
)

var (
	apiKey     string = "---------------"
	blinkState lights.State
)

func interpolate(x, in_min, in_max, out_min, out_max int64) int64 {
	return (x-in_min)*(out_max-out_min)/(in_max-in_min) + out_min
}

func lutronBrightnessToHue(x int64) int64 {
	return interpolate(x, 0, 100, 0, 255)
}

type targets struct {
	lights []int
	groups []int
}

var mirrorMapping = map[int]targets{
  // living room mirror
	7: targets{groups: []int{1}},
  // pico remote to bedroom
	8: targets{groups: []int{2}},
}

func main() {
	lutron := lutronlib.NewLutron("192.168.1.21", "./report.json")
	err := lutron.Connect()
	defer lutron.Disconnect()
	if err != nil {
		log.Fatal("Unable to connect to lutron bridge %v", err)
	}

	p := &portal.Portal{
		ID:                "--------------",
		InternalIPAddress: "192.168.1.22",
	}

	ll := lights.New(p.InternalIPAddress, apiKey)
	gg := groups.New(p.InternalIPAddress, apiKey)

	watchMessage := &lutronlib.LutronMsg{}
	watcher, _ := lutron.Watch(watchMessage)

	for msg := range watcher {
		if targets, ok := mirrorMapping[msg.Id]; ok {
			targetState := lights.State{}
			switch msg.Cmd {
			case lutronlib.Output:
				y := lutronBrightnessToHue(int64(msg.Value))
				if y == 0 {
					targetState.On = false
					// lutron fade to off is slower than Hue
					// but this depends on who is turning this off
					// value of 19 works well for pico remote, but is too slow for
					// apple home app
					// targetState.TransitionTime = 19

				} else {
					targetState.On = true
					targetState.Bri = uint8(y)
					// remove hue effects when mirroring lutron
					// but not when turning off lights
					targetState.Sat = 121
					targetState.Hue = 15339
				}

			case lutronlib.Device:
				// Buttons:
				// 2: top/on
				// 3: center/default
				// 4: bottom/off
				// 5: up/brighten
				// 6: down/dim
				if msg.Value != 3 {
					// only respond to button down event
					continue
				}
				switch msg.Action {
				case 4: // off
					targetState.On = false
				case 2: // reading
					targetState.On = true
					targetState.Bri = 255
					targetState.Sat = 121
					targetState.Hue = 15339
				case 3:
					targetState.On = true
					targetState.Bri = 1
					targetState.Sat = 251
					targetState.CT = 500
					targetState.Hue = 10777
				case 5:
					targetState.On = true
					targetState.Hue = 13547
					targetState.Bri = 144
					targetState.Sat = 199
					targetState.CT = 443
				}

			}

			for _, g := range targets.groups {
				go gg.SetGroupState(g, targetState)
			}

			for _, l := range targets.lights {
				go ll.SetLightState(l, targetState)
			}
		}
	}
}