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package main
import (
"fmt"
"log"
"github.com/paypal/gatt"
"github.com/paypal/gatt/examples/option"
"github.com/suapapa/go_eddystone"
)
const (
advTypeAllUUID16 = 0x03 // Complete List of 16-bit Service Class UUIDs
advTypeServiceData16 = 0x16 // Service Data - 16-bit UUID
)
const (
advFlagGeneralDiscoverable = 0x02
advFlagLEOnly = 0x04
)
func main() {
f, err := eddystone.MakeURLFrame("http://google.com", -20)
if err != nil {
panic(err)
}
fmt.Println(f)
// Advertise as an Eddystone beacon
a := &gatt.AdvPacket{}
a.AppendFlags(advFlagGeneralDiscoverable | advFlagLEOnly)
a.AppendField(advTypeAllUUID16, eddystone.SvcUUIDBytes)
a.AppendField(advTypeServiceData16, append(eddystone.SvcUUIDBytes, f...))
fmt.Println(a.Len(), a)
d, err := gatt.NewDevice(option.DefaultServerOptions...)
if err != nil {
log.Fatalf("Failed to open device, err: %s", err)
}
// Register optional handlers.
d.Handle(
gatt.CentralConnected(func(c gatt.Central) { fmt.Println("Connect: ", c.ID()) }),
gatt.CentralDisconnected(func(c gatt.Central) { fmt.Println("Disconnect: ", c.ID()) }),
)
// A mandatory handler for monitoring device state.
onStateChanged := func(d gatt.Device, s gatt.State) {
fmt.Printf("State: %s\n", s)
switch s {
case gatt.StatePoweredOn:
d.Advertise(a)
default:
log.Println(s)
}
}
d.Init(onStateChanged)
select {}
}
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