An rfcat script to replay an RF relay remote on 315 MHZ

remote_replay.py

#!/usr/bin/python2.7    
import time
import rflib
import bitstring

rfcat = rflib.RfCat()

# center frequency
rfcat.setFreq(314955000)

# AM On/Off Keying
rfcat.setMdmModulation(rflib.MOD_ASK_OOK)

# in audacity, out biggest pulse is about 
# 10 samples wide in a 44000 Hz wavefile
pulse_width = 10.0
sample_rate = 48000.0

# set the baudrate
rfcat.setMdmDRate(1.0/(pulse_width/sample_rate))

# charge the laser! 
rfcat.setMaxPower() 

on  = '1001011111010111'
off = '1001011111100111'

while True: 
    for data in [on, off]:

        # PCM 
        # 1    0    0    1    0    1    1    1
        # 1000 1110 1110 1000 1110 1000 1000 1000
        modulated = ''.join(['1000' if bit == '1' else '1110' for bit in data])
        packet = bitstring.BitArray(bin=(modulated)).tobytes()

        for _ in range(12):
            rfcat.RFxmit(packet, repeat=1)
        
        time.sleep(1)