--- /dev/null
+#!/usr/bin/env python3
+
+import serial
+
+# Kramer VS66
+
+def read_and_respond():
+ port = '/dev/ttyUSB1'
+ try:
+ ser = serial.Serial(port, baudrate=9600, timeout=0.1)
+ print("Serial port",port,"opened successfully.")
+ except serial.SerialException as e:
+ print("Error opening the serial port ",port,":", e)
+ return
+
+ while True:
+ # Read 4 bytes from the serial port
+ read_bytes = ser.read(size=4)
+
+ if len(read_bytes) == 0:
+ continue
+
+ if read_bytes == b"\x14\x82\x80\x81":
+ response = b"\x54\x82\x80\x81"
+ elif read_bytes == b"\x14\x81\x80\x81":
+ response = b"\x54\x81\x80\x81"
+ else:
+ response = b"\xDE\xAD\xBE\xEF"
+
+ # Send the response back
+ ser.write(response)
+
+ print("Received:", read_bytes, read_bytes.hex())
+ print("Response:", response, response.hex())
+
+if __name__ == "__main__":
+ read_and_respond()