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) {
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("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
}
}
