RaspyRFM/lacrosse.py

#!/usr/bin/env python2.7

from rfm69 import Rfm69
import rfm69
import sensors
from sensors import rawsensor
import sys
import time
import threading


if Rfm69.Test(1):
	print("Found RaspyRFM twin")
	rfm = Rfm69(1, 24) #when using the RaspyRFM twin
elif Rfm69.Test(0):
	print("Found RaspyRFM single")
	rfm = Rfm69() #when using a single single 868 MHz RaspyRFM
else:
	print("No RFM69 module found!")
	exit()
		
rfm.SetParams(
    Freq = 868.310, #MHz center frequency
    Datarate = 9.579, #17.241, #kbit/s baudrate
    ModulationType = rfm69.FSK, #modulation
    Deviation = 20, #90 kHz frequency deviation
    SyncPattern = [0x2d, 0xd4], #syncword
    Bandwidth = 150, #kHz bandwidth
    RssiThresh = -100, #-100 dB RSSI threshold
)
	
class BaudChanger(threading.Thread):
	baud = False
	def __init__(self):
		threading.Thread.__init__(self)
	
	def run(self):
		while True:
			time.sleep(15) 
			print "Change"
			if self.baud:
				rfm.SetParams(Datarate = 9.579)
			else:
				rfm.SetParams(Datarate = 17.241)
			self.baud = not self.baud

data = []

baudChanger = BaudChanger()
baudChanger.daemon = True
baudChanger.start()
#rfm.start()

#0x9f 0x6 0x5 0x32 0x32 0x0 0x0
#0x90 0x2 0x16 0x50 0xf 0x0 0x0
#0x9e 0x5 0x93 0x37 0x81 0x0 0x0
#0x9e 0x5 0x92 0x37 0x75 0x0 0x0
#0x93 0x45 0x84 0xb2 0xb5 0x9e 0x4d
#0x97 0x6 0x10 0x33 0x6 0x4f 0xb4
#0x9f 0x85 0x91 0x39 0x9 0x82 0x1b
#Frame error!
#0x6b 0x43 0xcd 0x16 0x21 0xe 0xe
#0xfc 0x9e 0x21 0x40 0x4e 0x47 0xca
#0x6f 0x85 0xaf 0x9 0x4c 0xa1 0xcc
#0x93 0x4 0xdd 0xff 0x61 0xc 0x15
#0x6a 0x83 0xd1 0x33 0x34 0x8f 0x44
#0x60 0x81 0xbd 0x6b 0x85 0xa1 0xcc
#0x6f 0x85 0xaf 0x8 0x7d 0xa1 0xcc
#0xda 0xc9 0xba 0x71 0xb5 0x58 0xd5
#0x61 0x82 0x2a 0x6e 0xc2 0xa1 0xcc
#0x6f 0x85 0xaf 0x8 0x7d 0xa1 0xcc
#0xf8 0x50 0x55 0x3f 0xee 0xbb 0x8d
#0x33 0xa0 0xd8 0x5a 0xf6 0x8 0x91
#0x60 0x81 0xbd 0x6b 0x85 0xa1 0xcc

def whitening(data, init):
	lfsr = init
	for i in range(len(data)):
		data[i] = data[i] ^ (lfsr & 0xFF)
		for j in range(8):
			if ((lfsr >> 5) ^ lfsr) & 0x01 != 0:
				lfsr |= 1<<9
			lfsr >>= 1
		
print "Waiting for sensors..."
while 1:
	data = rfm.ReceivePacket(5)

	if data == None:
		print("NO DATA")
		continue

	obj = rawsensor.CreateSensor(data).GetData()
	if not 'ID' in obj:
		continue
	print(data)
	print(obj)