git.rot13.org Git - veternica/blob - ser-kramer.py

   1 #!/usr/bin/env python3
   2
   3 import serial
   4
   5 # Kramer VS66
   6
   7 def read_and_respond():
   8     port = '/dev/ttyUSB1'
   9     try:
  10         ser = serial.Serial(port, baudrate=9600, timeout=0.1)
  11         print("Serial port",port,"opened successfully.")
  12     except serial.SerialException as e:
  13         print("Error opening the serial port ",port,":", e)
  14         return
  15
  16     while True:
  17         # Read 4 bytes from the serial port
  18         read_bytes = ser.read(size=4)
  19
  20         if len(read_bytes) == 0:
  21             continue
  22
  23         if read_bytes == b"\x14\x82\x80\x81":
  24             response = b"\x54\x82\x80\x81"
  25         elif read_bytes == b"\x14\x81\x80\x81":
  26             response = b"\x54\x81\x80\x81"
  27         else:
  28             response = b""
  29             #response = b"\xDE\xAD\xBE\xEF"
  30             print("ERROR no reponse for", read_bytes.hex())
  31
  32         # Send the response back
  33         ser.write(response)
  34
  35         print("<<", read_bytes.hex(), ">>", response.hex())
  36
  37 if __name__ == "__main__":
  38     read_and_respond()