实现RSSI和MAC判读

main.go

@@ -1,15 +1,49 @@
 package main
 
 import (
+	"encoding/binary"
+	"encoding/hex"
+	"errors"
 	"fmt"
 	"log"
+	"strings"
 
 	"github.com/paypal/gatt"
 	"github.com/paypal/gatt/examples/option"
 )
 
+type IBeancon struct {
+	Uuid  string
+	Major uint16
+	Minor uint16
+}
+
+func NewiBeacon(data []byte) (*IBeancon, error) {
+	if len(data) < 25 || binary.BigEndian.Uint32(data) != 0x4c000215 {
+		return nil, errors.New("Not an iBeacon")
+	}
+	beacon := new(IBeancon)
+	beacon.Uuid = strings.ToUpper(hex.EncodeToString(data[4:8]) + hex.EncodeToString(data[8:10]) + hex.EncodeToString(data[10:12]) + hex.EncodeToString(data[12:14]) + hex.EncodeToString(data[14:20]))
+	beacon.Major = binary.BigEndian.Uint16(data[20:22])
+	beacon.Minor = binary.BigEndian.Uint16(data[22:24])
+	return beacon, nil
+}
+
 func onPerhipheralDiscovered(p gatt.Peripheral, a *gatt.Advertisement, rssi int) {
-	fmt.Println(string(a.ManufacturerData))
+	// if p.ID() != "C6:1A:05:02:06:C0" {
+	// 	return
+	// }
+	if p.ID() != "90:98:38:F5:DA:60" {
+		return
+	}
+	fmt.Println("MAC:", p.ID(), "RSSI:", rssi, "LEN:", len(a.ManufacturerData))
+
+	b, err := NewiBeacon(a.ManufacturerData)
+	if err != nil {
+		fmt.Println(err.Error())
+		return
+	}
+	fmt.Printf("UUID: %s Major: %d Minor: %d RSSI: %d\n", b.Uuid, b.Major, b.Minor, rssi)
 }
 
 func onStateChanged(device gatt.Device, s gatt.State) {