From ef51dbe795d4ee1ce7875548b135dab1f5cf3c83 Mon Sep 17 00:00:00 2001
From: "suguo.yao" <ysg@myschools.me>
Date: Thu, 16 Dec 2021 14:19:03 +0800
Subject: [PATCH] =?UTF-8?q?=E5=AE=9E=E7=8E=B0RSSI=E5=92=8CMAC=E5=88=A4?=
 =?UTF-8?q?=E8=AF=BB?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 main.go | 36 +++++++++++++++++++++++++++++++++++-
 1 file changed, 35 insertions(+), 1 deletion(-)

diff --git a/main.go b/main.go
index f548dcc..fbc4c44 100644
--- a/main.go
+++ b/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) {