• 數位科學導論

Rabboni與Raspberry Pi

• 講義

• 待完成

  • 安裝Python藍牙套件

    Python BLE Library

    在樹苺派中開啟「終端機」程式，輸入以下指令並執行。

    pip3 install bluepy

     

  • 掃描藍牙裝置(scan_blue.py)
    • 低功率藍牙 USB Dongle

    

    將低功率藍牙 USB Dongle 插入樹苺派，掃描藍牙裝置的Python程式碼，如下：

     from bluepy.btle import Scanner, DefaultDelegate
    
    scanner = Scanner()
    devices = scanner.scan(10.0)
    
    for dev in devices:
        #print ("Device %s (%s)" % (dev.addr, dev.addrType))
        print ("Device %s (%s), RSSI=%d dB" % (dev.addr, dev.addrType, dev.rssi))
        
        for (adtype, desc, value) in dev.getScanData():
            print ("  %s = %s" % (desc, value))

    使用樹苺派的「終端機」輸入以下指令並執行。

    sudo python3 scan_blue.py

  • 讀取Rabboni數據(read_blue.py)

    在樹莓派中建立一個 read_blue.py 程式，內容如下：

    import struct
    from bluepy.btle import *
    import binascii
    import struct
    # callback class
    def com(temp):
        dec = int(temp,16)
        if dec > 32768:
            dec = ((dec ^ 0xFFFF) + 1 )* -1
        dec = dec * 2 / 32768
        return dec
    
    class MyDelegate(DefaultDelegate):
        def __init__(self):
            DefaultDelegate.__init__(self)
    
        def handleNotification(self, cHandle, data):
            
            t1 = binascii.hexlify(data)[0:4]
            t2 = binascii.hexlify(data)[4:8]
            t3 = binascii.hexlify(data)[8:12]
            t4 = binascii.hexlify(data)[12:16]
            t5 = binascii.hexlify(data)[16:20]
            t6 = binascii.hexlify(data)[20:24]
    
            print("Acc X = ",com(t1))
            print("Acc Y = ",com(t2))
            print("Acc Z = ",com(t3))
            print("Gyro X = ",com(t4)*500)
            print("Gyro Y = ",com(t5)*500)
            print("Gyro Z = ",com(t6)*500)
            
    ##############################################################
    #Scan boardcast
    scanner = Scanner()
    devices = scanner.scan(10.0)
    
    for dev in devices:
        print ("Device %s (%s), RSSI=%d dB" % (dev.addr, dev.addrType, dev.rssi))
        for (adtype, desc, value) in dev.getScanData():
            print ("  %s = %s" % (desc, value))
    
    
    print("input your device address")
    address = input()
    ###############################################################
    
    # connect to device
    #per = Peripheral("D4:DE:30:7D:F5:BC", "random")   #change address to your own rabboni's address
    per = Peripheral("CC:24:51:D9:16:28", "random")   #change address to your own rabboni's address
    # per = Peripheral(address, "random")   #change address to your own rabboni's address
    
    
    try:
        services_dic = per.getServices()    #get all service
        for service in services_dic:
            print("service uuid: ",service.uuid)        #get service's uuid
            charac_dic = service.getCharacteristics()   #get all characteristic
            for charac in charac_dic:
                print("characteristics uuid: ",charac.uuid)     #get characteristic's uuid
                print("handle: ",charac.getHandle())        #get characteristic's handle
    
        # set callback for notifications
        per.setDelegate(MyDelegate())
    
        # enable notification
        setup_data = b"\x01\x00"            #data for enable notification
        led_data = b"\x37\x01\x01"          #data for led 
    
        per.writeCharacteristic(45, led_data, withResponse=True)        #write led characteristic
        per.writeCharacteristic(23, setup_data, withResponse=True)      #write sensor characteristic
        
        # wait for answer
        while True:
            if per.waitForNotifications(5.0):                           
                continue
    finally:
        per.disconnect()

    修改其中的一行，如下，將它換成是你要連接的Rabboni裝置的網路序號。

    per = Peripheral("CC:24:51:D9:16:28", "random")   #change address to your own rabboni's address

    使用樹苺派的「終端機」輸入以下指令並執行。

    sudo python3 read_blue.py