sudo rfcomm bind 0 rfcomm0

import serial

ser = serial.Serial('/dev/rfcomm0',9600)
myhex = bytearray([0x01,0x13,0x20,0x0e,0x40,0x00,...]) #17 bytes, trimmed for brevity
ser.write(myhex)
print("Written!") #this line does display, so at least the write occurs
while 1:
    print(ser.read())

SerialException('device reports readiness to read but returned no data')