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