48 lines
1.5 KiB
Python
48 lines
1.5 KiB
Python
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#!/usr/bin/env python
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import socket
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class nec_control:
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def __init__(self, address, id, port=7142):
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self.__id = (id + int("40", 16)).to_bytes(1, "big")
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self.__socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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self.__socket.connect((address, port))
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def __genmsg(self, msgbody, msglength):
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# Header
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message = b""
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message += b"\x01\x30" # SOH (Start Of Header)
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message += self.__id # Destination (Monitor ID)
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message += b"\x30" # Source (for controller - always 0x30h (ASCII '0'))
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message += b"\x41" # Message type
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message += msglength # Message length in hex (example: 0x3Ah must be encoded as ASCII characters '3' and 'A')
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# Message
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message += b"\x02" # STX (Start of Message)
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message += msgbody
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message += b"\x03" # ETX (End of message)
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# Check code
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xor = message[1]
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for i in range (2, len(message)):
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xor = xor ^ message[i]
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message += bytes([xor])
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# Delimiter
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message += b"\x0d" # CR (carriage return)
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return(message)
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def powerOn(self):
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msgbody = b"\x43\x32\x30\x33\x44\x36\x30\x30\x30\x31"
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msglength = b"0C"
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message = self.__genmsg(msgbody, msglength)
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self.__socket.send(message)
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def powerOff(self):
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msgbody = b"\x43\x32\x30\x33\x44\x36\x30\x30\x30\x34"
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msglength = b"0C"
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message = self.__genmsg(msgbody, msglength)
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self.__socket.send(message)
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