90 lines
2.4 KiB
Go
90 lines
2.4 KiB
Go
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package main
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import (
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"machine"
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"time"
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"github.com/aykevl/go-bluetooth"
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)
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// flags + local name
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var advPayload = []byte("\x02\x01\x06" + "\x0b\x09LED colors")
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// TODO: use atomics to access this value.
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var ledColor = [3]byte{0xff, 0x00, 0x00} // start out with red
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var leds = [3]machine.Pin{machine.LED_RED, machine.LED_GREEN, machine.LED_BLUE}
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var hasColorChange = true
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var (
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serviceUUID = [16]byte{0xa0, 0xb4, 0x00, 0x01, 0x92, 0x6d, 0x4d, 0x61, 0x98, 0xdf, 0x8c, 0x5c, 0x62, 0xee, 0x53, 0xb3}
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charUUID = [16]byte{0xa0, 0xb4, 0x00, 0x02, 0x92, 0x6d, 0x4d, 0x61, 0x98, 0xdf, 0x8c, 0x5c, 0x62, 0xee, 0x53, 0xb3}
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)
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func main() {
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println("starting")
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adapter, err := bluetooth.DefaultAdapter()
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must("get default adapter", err)
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adapter.SetEventHandler(handleBluetoothEvents)
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must("enable SD", adapter.Enable())
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adv := adapter.NewAdvertisement()
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options := &bluetooth.AdvertiseOptions{
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Interval: bluetooth.NewAdvertiseInterval(100),
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}
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must("config adv", adv.Configure(advPayload, nil, options))
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must("start adv", adv.Start())
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var ledColorCharacteristic bluetooth.Characteristic
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must("add service", adapter.AddService(&bluetooth.Service{
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UUID: bluetooth.NewUUID(serviceUUID),
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Characteristics: []bluetooth.CharacteristicConfig{
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{
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Handle: &ledColorCharacteristic,
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UUID: bluetooth.NewUUID(charUUID),
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Value: ledColor[:],
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Flags: bluetooth.CharacteristicReadPermission | bluetooth.CharacteristicWritePermission,
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WriteEvent: func(client bluetooth.Connection, offset int, value []byte) {
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if offset != 0 || len(value) != 3 {
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return
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}
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ledColor[0] = value[0]
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ledColor[1] = value[1]
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ledColor[2] = value[2]
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hasColorChange = true
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},
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},
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},
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}))
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for _, led := range leds {
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led.Configure(machine.PinConfig{Mode: machine.PinOutput})
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}
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for {
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for !hasColorChange {
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time.Sleep(10 * time.Millisecond)
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}
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hasColorChange = false
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for i, led := range leds {
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led.Set(ledColor[i] == 0)
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}
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}
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}
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func must(action string, err error) {
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if err != nil {
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panic("failed to " + action + ": " + err.Error())
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}
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}
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// handleBluetoothEvents prints BLE events as they happen.
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func handleBluetoothEvents(evt bluetooth.Event) {
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switch evt := evt.(type) {
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case *bluetooth.ConnectEvent:
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println("evt: connected", evt.Connection)
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case *bluetooth.DisconnectEvent:
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println("evt: disconnected", evt.Connection)
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default:
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println("evt: unknown")
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}
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}
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