func (b *BLEClientAdaptor) DiscoveryHandler(p gatt.Peripheral, a *gatt.Advertisement, rssi int) {
// try looking by local name
if a.LocalName == b.UUID() {
b.uuid = p.ID()
} else {
// try looking by ID
id := strings.ToUpper(b.UUID())
if strings.ToUpper(p.ID()) != id {
return
}
}
// Stop scanning once we've got the peripheral we're looking for.
p.Device().StopScanning()
// and connect to it
p.Device().Connect(p)
}
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 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)
}