我應該如何使用這個十六進制數據向設備發送 ble 命令？

Question

我有這個 ble 繼電器板的中文手冊，它似乎說明為了激活繼電器 #1，發送的命令是：

C5 04 作為前綴 12345678 為密碼部分 AA 作為后綴

我如何從 python 腳本發送這個？ 我過去用過這個：

p = btle.Peripheral("bb:00:00:15:27:19")
s = p.getServiceByUUID("0000ffe0-0000-1000-8000-00805f9b34fb") #ffe0
c = s.getCharacteristics()[0]
c.write("e")
p.disconnect()

對於不同的董事會。 我知道 bluepy 代碼很好，它只是我需要更改的命令。

我粘貼了從手冊翻譯的圖像：

嘗試此代碼后：

  password = '12345678'
  response = c.write('\xC5\x04' + password + '\xAA', withResponse=True)

我收到此錯誤：

Traceback (most recent call last):
  File "1on.py", line 54, in <module>
    letsgobaby()
  File "1on.py", line 46, in letsgobaby
    response = c.write('\xC5\x04' + password + '\xAA', withResponse=True)
  File "/usr/local/lib/python2.7/dist-packages/bluepy/btle.py", line 168, in write
    return self.peripheral.writeCharacteristic(self.valHandle, val, withResponse)
  File "/usr/local/lib/python2.7/dist-packages/bluepy/btle.py", line 520, in writeCharacteristic
    return self._getResp('wr')
  File "/usr/local/lib/python2.7/dist-packages/bluepy/btle.py", line 376, in _getResp
    resp = self._waitResp(wantType + ['ntfy', 'ind'], timeout)
  File "/usr/local/lib/python2.7/dist-packages/bluepy/btle.py", line 331, in _waitResp
    raise BTLEException(BTLEException.DISCONNECTED, "Device disconnected")
bluepy.btle.BTLEException: Device disconnected

Answer 1

我可以建議將您的輸出更改為：

password = '12345678'            # Or whatever it may have changed to
c.write('\xC5\x04' + password + '\xAA')

這樣，它將根據該文檔發送適當的值。