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path: root/cmd/experimental/main.go
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package main

import (
	"log"

	"dim13.org/anki"
	"github.com/currantlabs/gatt"
)

func onStateChange(d gatt.Device, s gatt.State) {
	sid := gatt.MustParseUUID(anki.ServiceUUID)
	log.Println("State", s)
	switch s {
	case gatt.StatePoweredOn:
		log.Println("Scan...")
		d.Scan([]gatt.UUID{sid}, false)
	default:
		d.StopScanning()
	}
}

func onDiscover(p gatt.Peripheral, a *gatt.Advertisement, rssi int) {
	//defer p.Device().StopScanning()
	sid := gatt.MustParseUUID(anki.ServiceUUID)
	for _, s := range a.Services {
		log.Println("Found", p.ID())
		if s.Equal(sid) {
			log.Println("Connect", p.ID())
			p.Device().Connect(p)
		}
	}
}

func onRead(w gatt.ResponseWriter, r *gatt.ReadRequest) {
	log.Println("READ", r)
}

func onConnect(p gatt.Peripheral, err error) {
	ss, err := p.DiscoverServices(nil)
	if err != nil {
		log.Println(err)
		return
	}
	for _, s := range ss {
		log.Println("Service", s.UUID())
		cs, err := p.DiscoverCharacteristics(nil, s)
		if err != nil {
			log.Println("Discover Service", err)
			return
		}
		for _, c := range cs {
			log.Println("Characteristic", c.UUID())
			ds, err := p.DiscoverDescriptors(nil, c)
			if err != nil {
				log.Println("Discover Descriptors", err)
				return
			}
			for _, d := range ds {
				log.Println("Descriptor", d.UUID())
			}
			log.Println("Properties", c.Properties())
			if (c.Properties() & (gatt.CharNotify | gatt.CharIndicate)) != 0 {
				if err := p.SetNotifyValue(c, onNotify); err != nil {
					log.Println("Set notify", err)
					return
				}
			}
			if (c.Properties() & gatt.CharWrite) != 0 {
				//c.HandleReadFunc(onRead)
				//log.Println("Send")
				//c.SetValue([]byte{0x01, 0x18})
				p.WriteCharacteristic(c, []byte{0x01, 0x90}, false)      // sdk
				p.WriteCharacteristic(c, []byte{0x01, 0x16}, true)       // ping
				p.WriteCharacteristic(c, []byte{0x01, 0x18}, true)       // version
				p.WriteCharacteristic(c, []byte{0x01, 0x1a}, true)       // battery
				p.WriteCharacteristic(c, []byte{0x02, 0x1d, 0xff}, true) // lights
			}
		}
	}
}

func onNotify(c *gatt.Characteristic, b []byte, err error) {
	log.Printf("notify: % X | %q\n", b, b)
	id, payload := anki.SplitMsg(b)
	log.Printf("ID: %v | % X\n", id, payload)
}

func onDisconnect(p gatt.Peripheral, err error) {
	log.Println("Disconnect", p.ID())
	p.Device().CancelConnection(p)
}

func main() {
	d, err := gatt.NewDevice()
	if err != nil {
		log.Fatal(err)
	}
	d.Handle(
		gatt.PeripheralDiscovered(onDiscover),
		gatt.PeripheralConnected(onConnect),
		gatt.PeripheralDisconnected(onDisconnect),
	)
	d.Init(onStateChange)
	select {}
}