Go interactions for the ELK-BLEDOM RGB LED Controller
This repository contains information on the common (and cheap) ELK-BLEDOM Bluetooth Low Energy RGB LED controller, as well as a Go package for interacting with it.
Bluetooth interactions have been reverse engineered from the Android app. See PROTOCOL.md for more information on both the hardware and how it can be controlled.
Example
func main() {
ctx, cancel := context.WithCancel(context.Background())
d := device.NewBleDomRGBController(ctx, device.Options{})
if err := d.Connect(time.Duration(time.Minute)); err != nil {
panic(err)
}
gracefulTermination(cancel, d)
// Don't terminate until device has been cleanly shutdown
defer func() {
fmt.Println("waiting for device disconnection")
d.Done()
fmt.Println("device disconnected: terminating app")
}()
// Configure state polling; retrieve state every 30 seconds and log
// it to stdout.
d.PollState(time.Duration(30)*time.Second, func(state []byte) {
fmt.Println("recieved latest state from device", state)
})
fmt.Println("setting brightness to maximum")
d.WriteCommand(device.BrightnessCommandFromValue(96)) // 96%
i := 1
t := time.NewTimer(time.Second)
for {
select {
case <-ctx.Done():
fmt.Println("context cancelled: stopping commands")
t.Stop()
return
case <-t.C:
cmd := commands[i%len(commands)]
fmt.Println("changing colour: ", cmd.Red, cmd.Green, cmd.Blue)
d.WriteCommand(cmd)
i = i + 1
t.Reset(time.Second)
}
}
}
See colours.go.
