/
rfxtrx433.py
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/
rfxtrx433.py
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#!/usr/bin/python
import sys
import serial
import time
import threading
import syslog
import struct
TYPE_INTERFACE_CONTROL = 0x0
SUBTYPE_INTERFACE_COMMAND = 0x0
COMMAND_RESET = 0x0
COMMAND_STATUS = 0x2
COMMAND_ENABLE_UNDECODED = 0x5
COMMAND_ENABLE_ALL = 0x4
TYPE_INTERFACE_MESSAGE = 0x1
SUBTYPE_INTERFACE_RESPONSE = 0x0
TYPE_TEMP_MESSAGE = 0x50
SUBTYPE_TEMP_LACROSSE = 0x5
SUBTYPE_TEMP_VIKING_02811 = 0x7
TYPE_UNDECODED_MESSAGE = 0x3
SUBTYPE_UNDECODED_LACROSSE = 0x4
TYPE_LIGHTING2_MESSAGE = 0x11
SUBTYPE_LIGHTING2_AC = 0x0
SUBTYPE_LIGHTING2_ANSLUT = 0x2
TYPE_REMOTE_MESSAGE = 0x30
class Decoder:
def __init__(self, status_cb, temp_cb, button_cb):
self.packet_data = ""
self.status_cb = status_cb
self.temp_cb = temp_cb
self.button_cb = button_cb
def packet_done(self):
data_len = len(self.packet_data)
return data_len > 0 and data_len == (ord(self.packet_data[0])+1)
def put_char(self, c):
self.packet_data += c
if self.packet_done():
self.parse_packet()
self.reset()
return True
else:
return False
def get_byte(self, index):
return ord(self.packet_data[index])
def get_uint(self, index):
return struct.unpack_from("!I", self.packet_data, index)[0]
def parse_packet(self):
if len(self.packet_data) <= 1:
syslog.syslog(syslog.LOG_WARNING, "Got too short packet (%d bytes)." % len(self.packet_data))
return
ptype = self.get_byte(1)
if ptype == TYPE_INTERFACE_MESSAGE:
self.parse_interface_control()
elif ptype == TYPE_UNDECODED_MESSAGE:
self.parse_undecoded()
elif ptype == TYPE_TEMP_MESSAGE:
self.parse_temp()
elif ptype == TYPE_LIGHTING2_MESSAGE:
self.parse_lighting2()
else:
syslog.syslog(syslog.LOG_DEBUG, "Unknown packet type 0x%x" % ptype)
def parse_temp(self):
subtype = self.get_byte(2)
if subtype == SUBTYPE_TEMP_LACROSSE or SUBTYPE_TEMP_VIKING_02811:
seq_no = self.get_byte(3)
addr = self.get_byte(4)<<8 + self.get_byte(5)
if (self.get_byte(6) & 0x80) == 0:
temp = (self.get_byte(6)*256+self.get_byte(7)) / 10.0
else:
temp = - ((self.get_byte(6) & 0x7F)*256 + self.get_byte(7)) / 10.0
signal_level = (self.get_byte(8) & 0xf0) >> 4
self.temp_cb(addr, seq_no, temp, signal_level)
if self.get_byte(8) & 0xf == 0:
syslog.syslog(syslog.LOG_WARNING,
"Battery for sensor %d is low." % addr)
else:
syslog.syslog(syslog.LOG_DEBUG,
"Unknown temperature message subtype 0x%x" % subtype)
def parse_lighting2(self):
subtype = self.get_byte(2)
if subtype == SUBTYPE_LIGHTING2_AC:
seq_no = self.get_byte(3)
addr = self.get_uint(4)
unit = self.get_byte(8)
state = self.get_byte(9)
signal_level = (self.get_byte(11) & 0xf0) >> 4
syslog.syslog(syslog.LOG_DEBUG, "Lighting 2 - AC type message received. Seqno %d, device address 0x%x, unit %d, state %d, signal_level %d." % (seq_no, addr, unit, state, signal_level))
self.button_cb(addr, unit, state)
else:
syslog.syslog(syslog.LOG_WARNING,
"Unknown Lighting 2 subtype 0x%x" % state)
def parse_undecoded(self):
subtype = self.get_byte(2)
if subtype == SUBTYPE_UNDECODED_LACROSSE:
msg = ""
for b in self.packet_data[2:]:
msg += ("%d " % ord(b))
msg += "\n"
for b in self.packet_data[2:]:
msg += ("[%d %d] " % (ord(b)&0xf, (ord(b)>>4)&0xf))
msg += "\n"
for b in self.packet_data[2:]:
for i in range(7, -1, -1):
if (ord(b) >> i) & 1 == 1:
msg += "1"
else:
msg += "0"
msg += " "
msg += "\n"
else:
syslog.syslog(syslog.LOG_DEBUG,
"Unknown undecoded message subtype 0x%x" % subtype)
def parse_interface_control(self):
subtype = self.get_byte(2)
if subtype == SUBTYPE_INTERFACE_RESPONSE:
self.parse_interface_response()
else:
syslog.syslog(syslog.LOG_DEBUG,
"Unknown interface control packet 0x%x" % subtype)
def parse_interface_response(self):
cmd = self.get_byte(4)
if cmd == COMMAND_STATUS:
firmware_rev = self.get_byte(6)
self.status_cb(firmware_rev)
else:
syslog.syslog(syslog.LOG_DEBUG,
"Unknown interface response for command 0x%x" % cmd)
def reset(self):
self.packet_data = ""
def pad(ary, plen):
while len(ary) < plen:
ary += chr(0)
return ary
RESEND_TIMES = 3
RESEND_DELAY = 0.15
class RFXtrx433 (threading.Thread):
def __init__(self, dev_filename, temp_cb, button_cb):
threading.Thread.__init__(self)
self.daemon = True
self.dev_filename = dev_filename
self._seq = 1
self._decoder = Decoder(self._handle_status_response,
temp_cb, button_cb)
self.firmware_rev = None
self.shouldStop = False
def init(self):
self._open()
self._reset()
self._enable_all()
self._process_response()
# self._enable_undecoded()
# self._process_response()
self._status()
self._process_response()
def close(self):
self._dev.close()
def set_switch(self, device_id, unit_id, seq_no, state):
for i in range(0, RESEND_TIMES):
self._set_switch(device_id, unit_id, seq_no, state)
time.sleep(RESEND_DELAY)
def _set_switch(self, device_id, unit_id, seq_no, state):
# we assume all switches are "lighting 2" type
if state:
state_code = 1
else:
state_code = 0
payload = struct.pack("!BBBIBBBBB",
TYPE_LIGHTING2_MESSAGE,
SUBTYPE_LIGHTING2_AC,
seq_no,
device_id,
unit_id,
state_code,
0, # group
0, # dim value
0, # dunno
)
self._write_packet(payload)
def _open(self):
self._dev = serial.Serial(port=self.dev_filename,
parity=serial.PARITY_NONE,
stopbits=serial.STOPBITS_ONE,
bytesize=serial.EIGHTBITS,
baudrate=38400,
timeout=0.3)
def _nextSeq(self):
this = self._seq
self._seq += 1
if self._seq >= 256:
self._seq = 1
return this
def _write_packet(self, payload):
#packet = chr(len(payload))
packet = struct.pack("!H", len(payload))
packet += payload
self._dev.write(packet)
self._dev.flush()
def _reset(self):
syslog.syslog(syslog.LOG_DEBUG,
"Resetting device.")
self._issue_interface_command(COMMAND_RESET)
syslog.syslog(syslog.LOG_DEBUG,
"Waiting for device to boot up.")
time.sleep(2)
def _enable_undecoded(self):
syslog.syslog(syslog.LOG_DEBUG, "Enabling undecoded")
self._issue_interface_command(COMMAND_ENABLE_UNDECODED)
self._process_response()
def _enable_all(self):
syslog.syslog(syslog.LOG_DEBUG, "Enabling all")
self._issue_interface_command(COMMAND_ENABLE_ALL)
self._process_response()
def _status(self):
syslog.syslog(syslog.LOG_DEBUG, "Issued status.")
self._issue_interface_command(COMMAND_STATUS)
self._process_response()
def _handle_status_response(self, firmware_rev):
syslog.syslog(syslog.LOG_DEBUG, "Firmware revision: %d" % firmware_rev)
self.firmware_rev = firmware_rev
def _issue_interface_command(self, cmd):
self._write_packet(chr(TYPE_INTERFACE_CONTROL) + \
chr(SUBTYPE_INTERFACE_COMMAND) + \
chr(self._nextSeq()) + \
chr(cmd))
def _process_response(self):
completed = False
while not completed:
c = self._dev.read(1)
if not c:
return # timeout
completed = self._decoder.put_char(c)
def halt(self):
self.shouldStop = True
self._dev.close()
self.join()
def run(self):
self.init()
while not self.shouldStop:
self._process_response()