func onPeriphDiscovered(p gatt.Peripheral, a *gatt.Advertisement, rssi int) {
fmt.Printf("\nPeripheral ID:%s, NAME:(%s)\n", p.ID(), p.Name())
fmt.Println(" Local Name =", a.LocalName)
fmt.Println(" TX Power Level =", a.TxPowerLevel)
fmt.Println(" Manufacturer Data =", a.ManufacturerData)
fmt.Println(" Service Data =", a.ServiceData)
}
func getServiceById(p gatt.Peripheral, serviceId Gid, name string) *gatt.Service {
serv, err := p.DiscoverServices(serviceId.asUUID())
if (err != nil) || (len(serv) == 0) {
log.Fatalf("%s service not found", name)
}
return serv[0]
}
func onPeriphDiscovered(p gatt.Peripheral, a *gatt.Advertisement, rssi int) {
id := strings.ToUpper(flag.Args()[0])
if strings.ToUpper(p.ID()) != id {
return
}
// Stop scanning once we've got the peripheral we're looking for.
p.Device().StopScanning()
fmt.Printf("\nPeripheral ID:%s, NAME:(%s)\n", p.ID(), p.Name())
fmt.Println(" Local Name =", a.LocalName)
fmt.Println(" TX Power Level =", a.TxPowerLevel)
fmt.Println(" Manufacturer Data =", a.ManufacturerData)
fmt.Println(" Service Data =", a.ServiceData)
fmt.Println("")
p.Device().Connect(p)
}
func onPeriphDiscovered(p gatt.Peripheral, a *gatt.Advertisement, rssi int) {
if strings.ToUpper(p.ID()) != strings.ToUpper(baseDeviceId) {
return
}
// Stop scanning once we've got the peripheral we're looking for.
p.Device().StopScanning()
if len(p.Name()) > 0 {
log.Println("Device found: ", p.Name())
} else {
log.Println("Device found")
}
log.Println(" Local Name =", a.LocalName)
log.Println(" TX Power Level =", a.TxPowerLevel)
log.Println(" Manufacturer Data =", a.ManufacturerData)
log.Println(" Service Data =", a.ServiceData)
p.Device().Connect(p)
}
func checkBatteryLevel(p gatt.Peripheral) {
// battery has its Id from bt standarts
serv := getServiceById(p, SERVICE_BATTERY, "Battery")
log.Printf("Battery found (service=%s)\n", serv.UUID().String())
// Get battery level characteristic
cs, err := p.DiscoverCharacteristics(CHAR_BATTERY.asUUID(), serv)
if err != nil || len(cs) == 0 {
log.Fatal("Failed to discover battery characteristics, err: %s\n", err)
}
var btrchr *gatt.Characteristic
// read current battery level
btrchr = cs[0]
val, err := p.ReadCharacteristic(btrchr)
if err != nil {
log.Println("Error reading battery level: ", err)
}
log.Printf("Battery level: %d%%\n", val[0])
// setup notification on battery level
if (btrchr.Properties() & (gatt.CharNotify | gatt.CharIndicate)) != 0 {
bnf := func(c *gatt.Characteristic, b []byte, err error) {
log.Printf("Battery level: %d%%\n", b[0])
}
if err := p.SetNotifyValue(btrchr, bnf); err != nil {
log.Fatal("Failed to subscribe battery characteristic, err: %s\n", err)
}
}
close(done)
}
func onPeriphDiscovered(p gatt.Peripheral, a *gatt.Advertisement, rssi int) {
if !strings.Contains(a.LocalName, "SensorTag") {
return
}
// Stop scanning once we've got the peripheral we're looking for.
p.Device().StopScanning()
log.Printf("\nPeripheral ID:%s, NAME:(%s)\n", p.ID(), p.Name())
log.Println(" Local Name =", a.LocalName)
log.Println(" TX Power Level =", a.TxPowerLevel)
log.Println(" Manufacturer Data =", a.ManufacturerData)
log.Println(" Service Data =", a.ServiceData)
log.Println("")
p.Device().Connect(p)
}
func onPeriphConnected(p gatt.Peripheral, err error) {
fmt.Println("Connected")
defer p.Device().CancelConnection(p)
// Discovery services
ss, err := p.DiscoverServices(nil)
if err != nil {
fmt.Printf("Failed to discover services, err: %s\n", err)
return
}
for _, s := range ss {
msg := "Service: " + s.UUID().String()
if len(s.Name()) > 0 {
msg += " (" + s.Name() + ")"
}
fmt.Println(msg)
// Discovery characteristics
cs, err := p.DiscoverCharacteristics(nil, s)
if err != nil {
fmt.Printf("Failed to discover characteristics, err: %s\n", err)
continue
}
for _, c := range cs {
msg := " Characteristic " + c.UUID().String()
if len(c.Name()) > 0 {
msg += " (" + c.Name() + ")"
}
msg += "\n properties " + c.Properties().String()
fmt.Println(msg)
// Read the characteristic, if possible.
if (c.Properties() & gatt.CharRead) != 0 {
b, err := p.ReadCharacteristic(c)
if err != nil {
fmt.Printf("Failed to read characteristic, err: %s\n", err)
continue
}
fmt.Printf(" value %x | %q\n", b, b)
}
// Discovery descriptors
ds, err := p.DiscoverDescriptors(nil, c)
if err != nil {
fmt.Printf("Failed to discover descriptors, err: %s\n", err)
continue
}
for _, d := range ds {
msg := " Descriptor " + d.UUID().String()
if len(d.Name()) > 0 {
msg += " (" + d.Name() + ")"
}
fmt.Println(msg)
// Read descriptor (could fail, if it's not readable)
b, err := p.ReadDescriptor(d)
if err != nil {
fmt.Printf("Failed to read descriptor, err: %s\n", err)
continue
}
fmt.Printf(" value %x | %q\n", b, b)
}
}
fmt.Println()
}
}
func onPeriphConnected(p gatt.Peripheral, err error) {
log.Println("Connection ok")
defer p.Device().CancelConnection(p)
checkBatteryLevel(p)
}
func onPeriphConnected(p gatt.Peripheral, err error) {
fmt.Println("Connected")
defer p.Device().CancelConnection(p)
if err := p.SetMTU(500); err != nil {
fmt.Printf("Failed to set MTU, err: %s\n", err)
}
// Discovery services
ss, err := p.DiscoverServices(nil)
if err != nil {
fmt.Printf("Failed to discover services, err: %s\n", err)
return
}
for _, s := range ss {
msg := "Service: " + s.UUID().String()
if len(s.Name()) > 0 {
msg += " (" + s.Name() + ")"
}
fmt.Println(msg)
// Discovery characteristics
cs, err := p.DiscoverCharacteristics(nil, s)
if err != nil {
fmt.Printf("Failed to discover characteristics, err: %s\n", err)
continue
}
for _, c := range cs {
msg := " Characteristic " + c.UUID().String()
if len(c.Name()) > 0 {
msg += " (" + c.Name() + ")"
}
msg += "\n properties " + c.Properties().String()
fmt.Println(msg)
// Read the characteristic, if possible.
if (c.Properties() & gatt.CharRead) != 0 {
b, err := p.ReadCharacteristic(c)
if err != nil {
fmt.Printf("Failed to read characteristic, err: %s\n", err)
continue
}
fmt.Printf(" value %x | %q\n", b, b)
}
// Discovery descriptors
ds, err := p.DiscoverDescriptors(nil, c)
if err != nil {
fmt.Printf("Failed to discover descriptors, err: %s\n", err)
continue
}
for _, d := range ds {
msg := " Descriptor " + d.UUID().String()
if len(d.Name()) > 0 {
msg += " (" + d.Name() + ")"
}
fmt.Println(msg)
// Read descriptor (could fail, if it's not readable)
b, err := p.ReadDescriptor(d)
if err != nil {
fmt.Printf("Failed to read descriptor, err: %s\n", err)
continue
}
fmt.Printf(" value %x | %q\n", b, b)
}
// Subscribe the characteristic, if possible.
if (c.Properties() & (gatt.CharNotify | gatt.CharIndicate)) != 0 {
f := func(c *gatt.Characteristic, b []byte, err error) {
fmt.Printf("notified: % X | %q\n", b, b)
}
if err := p.SetNotifyValue(c, f); err != nil {
fmt.Printf("Failed to subscribe characteristic, err: %s\n", err)
continue
}
}
}
fmt.Println()
}
fmt.Printf("Waiting for 5 seconds to get some notifiations, if any.\n")
time.Sleep(5 * time.Second)
}
func onPeriphConnected(p gatt.Peripheral, err error) {
log.Println("Connected")
peripheral = p
err = p.SetMTU(500)
if err != nil {
log.Printf("Failed to set MTU, err: %s\n", err)
}
uuid, err := gatt.ParseUUID("f000aa00-0451-4000-b000-000000000000")
if err != nil {
log.Printf("Failed to create UUID, err: %s\n", err)
return
}
ss, err := p.DiscoverServices(nil)
if err != nil {
log.Printf("Failed to discover IR sensor service, err: %s\n", err)
return
}
var s *gatt.Service
for _, s = range ss {
if s.UUID().Equal(uuid) {
break
}
}
cs, err := p.DiscoverCharacteristics(nil, s)
if err != nil {
log.Printf("Failed to discover characteristics, err: %s\n", err)
return
}
for _, c := range cs {
_, err = p.DiscoverDescriptors(nil, c)
if err != nil {
log.Printf("Failed to discover descriptors, err: %s\n", err)
return
}
}
data := cs[0]
config := cs[1]
samplerate := cs[2]
// Turn on notifications
err = p.SetNotifyValue(data, handleTempNotification)
if err != nil {
log.Printf("Failed to write config characteristics, err: %s\n", err)
return
}
// Set sample rate
err = p.WriteCharacteristic(samplerate, []byte{0xFF}, false)
if err != nil {
log.Printf("Failed to write samplerate characteristics, err: %s\n", err)
return
}
// Start sensors
err = p.WriteCharacteristic(config, []byte{0x01}, false)
if err != nil {
log.Printf("Failed to write config characteristics, err: %s\n", err)
return
}
}