def connect(self):
"""
Connect to a knxd server, after connection commands can be sent.
"""
self.socket = socket.socket()
self.socket.connect((self.ip, int(self.port)))
self.socket.send(encode_data('HHB', [self.EIB_OPEN_GROUPCON, 0, 0]))
self.connected = True
async def connect(self):
"""
Connect to a knxd server
"""
self.socket = socket.socket()
self.socket.connect((self.ip, int(self.port)))
self.socket.send(encode_data('HHB', [self.EIB_OPEN_GROUPCON, 0, 0]))
reader, writer = await asyncio.open_connection(self.ip, self.port)
writer.write(encode_data('HHB', [self.EIB_OPEN_GROUPCON, 0, 0]))
async def listen(reader):
while True:
data = await reader.read(100)
self.callback(data)
self.loop.create_task(listen(reader))
def listen():
self.listening = True
while self.listening:
logger.debug('opening new connection')
recv_socket = socket.socket()
recv_socket.connect((self.ip, int(self.port)))
recv_socket.send(
encode_data('HHB', [self.EIB_OPEN_GROUPCON, 0, 0]))
buf = bytearray()
num_read = 0
telegram_length = 2
# while self.listening:
# data = recv_socket.recv(100)
# print(data)
while self.listening:
try:
data = recv_socket.recv(100)
if not data:
break
num_read += len(data)
buf.extend(data)
if num_read < telegram_length:
continue
telegram_length = (buf[0] << 0 | buf[1])
if num_read < telegram_length + 2:
continue
ttype = (buf[2] << 8 | buf[3])
if ttype != 39 or len(buf) < 6:
buf = bytearray()
num_read = 0
telegram_length = 2
continue
message = decode_telegram(buf)
callback(message)
telegram_length = 2
num_read = 0
buf = bytearray()
except:
logger.exception('exception while listening')
break
recv_socket.close()
time.sleep(1)
async def group_read(self, ga):
"""
Reads a value from the KNX bus
Parameters
----------
ga : string or int
the group address to write to as a string (e.g. '1/1/64') or an integer (0-65535)
"""
if type(ga) is str:
addr = encode_ga(ga)
else:
addr = ga
self.socket.send(
encode_data('HHBB',
[self.EIB_GROUP_PACKET, addr, 0, self.KNXREAD]))
def group_write(self, ga, data, dpt=None):
"""
Writes a value to the KNX bus
Parameters
----------
ga : string or int
the group address to write to as a string (e.g. '1/1/64') or an integer (0-65535)
dpt : string
the data point type of the group address, used to encode the data
"""
if type(ga) is str:
addr = encode_ga(ga)
else:
addr = ga
if dpt is not None:
encode_dpt(data, dpt)
self.socket.send(
encode_data(
'HHBB',
[self.EIB_GROUP_PACKET, addr, 0, self.KNXWRITE | data]))