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如何使用BleuIO的多連接功能

2076046 2023-06-26 | zip | 0.00 MB | 次下載 | 免費

資料介紹

描述

藍牙低功耗技術提供了一種連接智能設備的合適方式。物聯(lián)網(wǎng)（IoT）或物聯(lián)網(wǎng)（Internet of Things）這個詞帶來了新技術，在連接時代改變和創(chuàng)造世界。物聯(lián)網(wǎng)表示一切都已連接，而藍牙使工作變得更加容易。一臺中央設備可以啟動并保持與多個低功耗藍牙外圍設備的連接。

BleuIO 是一種藍牙低功耗解決方案，可以以最快、最簡單的方式創(chuàng)建新的 BLE 5.0 應用程序。使用此 BleuIO 的多連接功能，我們可以輕松連接到多個 BLE 設備并在它們之間傳輸數(shù)據(jù)。

本文將解釋如何使用 BleuIO 的多連接功能，連接多個 BLE 設備并在它們之間傳輸數(shù)據(jù)。我們將為這個項目使用三個 BleuIO 加密狗：一個中央和兩個外圍。中央加密狗將連接到外圍設備并同時發(fā)送數(shù)據(jù)。

我們將創(chuàng)建一個簡單的 python 腳本來幫助我們完成任務。

要求：

3 個 BleuIO 加密狗。
Python 2.7 或 Python 3.4 及更新版本
pyserial 3.5

任務：

步驟1：

讓我們創(chuàng)建一個名為py_serial_transfer.py的 python 文件并復制以下代碼。

源代碼也可以在 GitHub 上獲得

https://github.com/smart-sensor-devices-ab/ble_multi_connection_example.git

#!/usr/bin/python
# -*- coding: utf-8 -*-
import serial
import time
import string
import random

target_dongle_mac_address = '[0]40:48:FD:E5:2D:AF'  # Change this to the 1st peripheral's mac address.
target_dongle_mac_address2 = '[0]40:48:FD:E5:2D:B5'  # Change this to the 2nd peripheral's mac address.
your_com_port = 'COM7'  # Change this to the com port your dongle is connected to.

connecting_to_dongle = True
trying_to_connect = False
trying_to_connect2 = False


def id_generator(size=10, chars=string.ascii_uppercase + string.digits):
    return ''.join(random.choice(chars) for _ in range(size))


print 'Connecting to dongle...'

# Trying to connect to dongle until connected. Make sure the port and baudrate is the same as your dongle.
# You can check in the device manager to see what port then right-click and choose properties then the Port Settings
# tab to see the other settings

while connecting_to_dongle:
    try:
        console = serial.Serial(
            port=your_com_port,
            baudrate=57600,
            parity='N',
            stopbits=1,
            bytesize=8,
            timeout=0,
            )
        if console.is_open.__bool__():
            connecting_to_dongle = False
    except:
        print 'Dongle not connected. Please reconnect Dongle.'
        time.sleep(5)

print 'Connected to Dongle.'

connected = '0'
connected2 = '0'
while 1 and console.is_open.__bool__():
    console.write(str.encode('AT+DUAL'))
    console.write('\r'.encode())
    time.sleep(0.1)
    print 'Putting dongle in Dual role and trying to connect to other dongle.'
    while connected == '0':
        time.sleep(0.5)
        if not trying_to_connect:
            console.write(str.encode('AT+GAPCONNECT='))
            console.write(str.encode(target_dongle_mac_address))
            console.write('\r'.encode())
            trying_to_connect = True
        dongle_output2 = console.read(console.in_waiting)
        time.sleep(2)
        print 'Trying to connect to Peripheral 1...'
        if not dongle_output2.isspace():
            if dongle_output2.decode().__contains__('\r\nCONNECTED.'):
                connected = '1'
                print 'Connected to 1st device!'
                time.sleep(5)
            if dongle_output2.decode().__contains__('\r\nDISCONNECTED.'
                    ):
                connected = '0'
                print 'Disconnected!'
                trying_to_connect = False
            dongle_output2 = ' '
    while connected2 == '0':
        time.sleep(0.5)
        if not trying_to_connect2:
            console.write(str.encode('AT+GAPCONNECT='))
            console.write(str.encode(target_dongle_mac_address2))
            console.write('\r'.encode())
            trying_to_connect2 = True
        dongle_output2 = console.read(console.in_waiting)
        time.sleep(2)
        print 'Trying to connect to Peripheral 2...'
        if not dongle_output2.isspace():
            if dongle_output2.decode().__contains__('\r\nCONNECTED.'):
                connected2 = '1'
                print 'Connected to 2nd device!'
                time.sleep(5)
            if dongle_output2.decode().__contains__('\r\nDISCONNECTED.'
                    ):
                connected2 = '0'
                print 'Disconnected!'
                trying_to_connect2 = False
            dongle_output2 = ' '
    while connected == '1' and connected2 == '1':
        dongle_output3 = console.read(console.in_waiting)
        delay = 10
        close_time = time.time() + delay
        i = 0
        while True:
            myConIndex = ('0000' if i % 2 == 0 else '0001')
            console.write(str.encode('AT+TARGETCONN='))
            console.write(str.encode(myConIndex))
            console.write('\r'.encode())
            console.write(str.encode('AT+SPSSEND='))
            console.write(str.encode(id_generator() + '-' + myConIndex))
            console.write('\r'.encode())
            time.sleep(0.2)
            i += 1
            if time.time() > close_time:
                break
        console.write(str.encode('AT+SPSSEND=[DONE]\r'))
        time.sleep(0.2)
        print 'Sending complete!\r\n'
        print 'Exiting script...'
        exit()