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//shows how to watch for new devices and list them
package discovery_example
import (
"context"
"os"
"os/signal"
"github.com/muka/go-bluetooth/api"
"github.com/muka/go-bluetooth/api/beacon"
"github.com/muka/go-bluetooth/bluez/profile/adapter"
"github.com/muka/go-bluetooth/bluez/profile/device"
log "github.com/sirupsen/logrus"
eddystone "github.com/suapapa/go_eddystone"
)
func Run(adapterID string, onlyBeacon bool) error {
//clean up connection on exit
defer api.Exit()
a, err := adapter.GetAdapter(adapterID)
if err != nil {
return err
}
log.Debug("Flush cached devices")
err = a.FlushDevices()
if err != nil {
return err
}
log.Debug("Start discovery")
discovery, cancel, err := api.Discover(a, nil)
if err != nil {
return err
}
defer cancel()
go func() {
for ev := range discovery {
if ev.Type == adapter.DeviceRemoved {
continue
}
dev, err := device.NewDevice1(ev.Path)
if err != nil {
log.Errorf("%s: %s", ev.Path, err)
continue
}
if dev == nil {
log.Errorf("%s: not found", ev.Path)
continue
}
log.Infof("name=%s addr=%s rssi=%d", dev.Properties.Name, dev.Properties.Address, dev.Properties.RSSI)
go func(ev *adapter.DeviceDiscovered) {
err = handleBeacon(dev)
if err != nil {
log.Errorf("%s: %s", ev.Path, err)
}
}(ev)
}
}()
ch := make(chan os.Signal)
signal.Notify(ch, os.Interrupt, os.Kill) // get notified of all OS signals
sig := <-ch
log.Infof("Received signal [%v]; shutting down...\n", sig)
return nil
}
func handleBeacon(dev *device.Device1) error {
b, err := beacon.NewBeacon(dev)
if err != nil {
return err
}
beaconUpdated, err := b.WatchDeviceChanges(context.Background())
if err != nil {
return err
}
isBeacon := <-beaconUpdated
if !isBeacon {
return nil
}
name := b.Device.Properties.Alias
if name == "" {
name = b.Device.Properties.Name
}
log.Debugf("Found beacon %s %s", b.Type, name)
if b.IsEddystone() {
ed := b.GetEddystone()
switch ed.Frame {
case eddystone.UID:
log.Debugf(
"Eddystone UID %s instance %s (%ddbi)",
ed.UID,
ed.InstanceUID,
ed.CalibratedTxPower,
)
break
case eddystone.TLM:
log.Debugf(
"Eddystone TLM temp:%.0f batt:%d last reboot:%d advertising pdu:%d (%ddbi)",
ed.TLMTemperature,
ed.TLMBatteryVoltage,
ed.TLMLastRebootedTime,
ed.TLMAdvertisingPDU,
ed.CalibratedTxPower,
)
break
case eddystone.URL:
log.Debugf(
"Eddystone URL %s (%ddbi)",
ed.URL,
ed.CalibratedTxPower,
)
break
}
}
if b.IsIBeacon() {
ibeacon := b.GetIBeacon()
log.Debugf(
"IBeacon %s (%ddbi) (major=%d minor=%d)",
ibeacon.ProximityUUID,
ibeacon.MeasuredPower,
ibeacon.Major,
ibeacon.Minor,
)
}
return nil
}
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