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-rw-r--r--.gitignore1
-rw-r--r--Makefile2
-rw-r--r--colortemp.go11
-rw-r--r--main.go76
4 files changed, 90 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..2b6a5ff
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+phlux
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..230b023
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,2 @@
+phlux: main.go colortemp.go
+ go build .
diff --git a/colortemp.go b/colortemp.go
new file mode 100644
index 0000000..d621043
--- /dev/null
+++ b/colortemp.go
@@ -0,0 +1,11 @@
+package main
+
+import (
+ "time"
+)
+
+type ColorTemperature uint
+
+func getDesiredColorTemperature(at time.Time) ColorTemperature {
+ return 1800
+}
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..7636ad2
--- /dev/null
+++ b/main.go
@@ -0,0 +1,76 @@
+package main
+
+import (
+ "log"
+ "math"
+ "os"
+ "time"
+
+ hue "github.com/benburwell/gohue"
+)
+
+const username = "phlux"
+
+func main() {
+ bridges, err := hue.FindBridges()
+ if err != nil {
+ log.Fatalf("Error finding bridges: %s\n", err.Error())
+ }
+ log.Printf("Found %d bridge(s)\n", len(bridges))
+ for _, bridge := range bridges {
+ log.Printf("Bridge: %s\n", bridge.IPAddress)
+ //username, err := bridge.CreateUser(username)
+ //if err != nil {
+ // panic("Could not create user on bridge")
+ //}
+ //fmt.Printf("Made user %s for bridge %s\n", username, bridge.IPAddress)
+ err = bridge.Login(os.Getenv("HUE_LOGIN"))
+ if err != nil {
+ log.Fatalf("Could not log in to bridge: %s", err.Error())
+ }
+ log.Println("Logged in to bridge")
+ lights, err := bridge.GetAllLights()
+ if err != nil {
+ log.Fatalf("Error getting lights: %s\n", err.Error())
+ }
+ log.Printf("Found %d lights\n", len(lights))
+ for _, light := range lights {
+ log.Printf("Light %d: %s (%s)\n", light.Index, light.Name, light.Type)
+ if supportsColorTemp(light) {
+ log.Printf(" CT range: %d-%d\n", light.Capabilities.Control.CT.Min, light.Capabilities.Control.CT.Max)
+ if light.Index == 8 {
+ newCt := translateCtForLight(getDesiredColorTemperature(time.Now()), light)
+ log.Printf(" Setting CT to %d\n", newCt)
+ light.SetState(hue.LightState{
+ On: light.State.On,
+ CT: newCt,
+ })
+ }
+ }
+ }
+ }
+}
+
+// Determine whether there is a non-zero color temperature range for the given light
+func supportsColorTemp(l hue.Light) bool {
+ return l.Capabilities.Control.CT.Max > l.Capabilities.Control.CT.Min
+}
+
+// Translate a desired color temperature in Kelvins to a value comprehensible
+// by a Hue luminaire. According to Hue documentation, the value 153
+// corresponds to 6500K, and 500 corresponds to 2000K. Using these known
+// values, we'll create a mapping between spaces, and additionally limit the
+// resulting value by the range that the luminaire supports.
+//
+// 153 <=> 6500K
+// 500 <=> 2000K
+// =============
+// 347 4500
+func translateCtForLight(ct ColorTemperature, light hue.Light) uint16 {
+ divisor := 12.968
+ scaled := float64(ct) / divisor
+ inverted := 500 - scaled + 153
+ min := float64(light.Capabilities.Control.CT.Min)
+ max := float64(light.Capabilities.Control.CT.Max)
+ return uint16(math.Max(min, math.Min(max, inverted)))
+}