292 lines
10 KiB
Python
292 lines
10 KiB
Python
from bluepy import btle
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import time
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import datetime
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import uuid
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class SEMSocket():
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password = "0000"
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powered = False
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voltage = 0
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current = 0
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power = 0
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power_factor = 0
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total_power = 0
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frequency = 0
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mac_address = ""
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custom_service = None
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authenticated = False
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_name = None
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_read_char = None
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_write_char = None
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_notify_char = None
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_name_char = None
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_btle_device = None
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def __init__(self, mac):
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self.mac_address = mac
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self._btle_device = btle.Peripheral(None ,addrType=btle.ADDR_TYPE_PUBLIC,iface=0)
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try:
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self.reconnect()
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except self.NotConnectedException:
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# initial connection may fail. It is up to the code what to do
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pass
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def getStatus(self):
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#15, 5, 4, 0, 0, 0, 5, -1, -1
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cmd = bytearray([0x04])
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payload = bytearray([0x00, 0x00, 0x00])
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msg = self.BTLEMessage(self, cmd, payload)
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return msg.send()
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def setStatus(self, status):
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# 0f 06 03 00 01 00 00 05 ff ff -> on
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# 0f 06 03 00 00 00 00 04 ff ff -> off
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cmd = bytearray([0x03])
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payload = bytearray([0x00, status, 0x00, 0x00])
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msg = self.BTLEMessage(self, cmd, payload)
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return msg.send()
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def syncTime(self):
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#15, 12, 1, 0, SECOND, MINUTE, HOUR_OF_DAY, DAY_OF_MONTH, MONTH (+1), int(YEAR/256), YEAR%256, 0, 0, CHKSUM, 255, 255
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now = datetime.datetime.now()
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cmd = bytearray([0x01])
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payload = bytearray([0x00])
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payload += bytearray([now.second, now.minute, now.hour])
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payload += bytearray([now.day, now.month, int(now.year/256), now.year%256])
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payload += bytearray([0x00, 0x00])
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msg = self.BTLEMessage(self, cmd, payload)
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return msg.send()
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def login(self, password):
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self.password = password
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cmd = bytearray([0x17])
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payload = bytearray()
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payload.append(0x00)
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payload.append(0x00)
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for i in range(4):
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payload.append(int(self.password[i]))
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payload.append(0x00)
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payload.append(0x00)
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payload.append(0x00)
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payload.append(0x00)
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msg = self.BTLEMessage(self, cmd, payload)
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success = msg.send()
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self.authenticated = self.authenticated and success
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return success
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def changePassword(self, newPassword):
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cmd = bytearray([0x17])
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payload = bytearray()
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payload.append(0x00)
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payload.append(0x01)
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for i in range(4):
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payload.append(int(newPassword[i]))
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for i in range(4):
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payload.append(int(self.password[i]))
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self.password = newPassword
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msg = self.BTLEMessage(self, cmd, payload)
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success = msg.send()
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self.authenticated = self.authenticated and success
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return success
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@property
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def name(self):
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self._name = self._name_char.read().decode("UTF-8")
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return self._name
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@name.setter
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def name(self, newName):
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newNameBytes = newName.encode("UTF-8")
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cmd = bytearray([0x02])
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payload = bytearray()
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payload.append(0x02)
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for i in range(20):
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if i <= (len(newNameBytes) - 1):
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payload.append(newNameBytes[i])
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else:
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payload.append(0x00)
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msg = self.BTLEMessage(self, cmd, payload)
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success = msg.send()
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# For some reason the original app sets the first 7 bytes of the payload to zero and sends it again.
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# However, a first test showed, that this really doesn't change anything. If it becomes neccessary here's a first draft:
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#for i in range(7):
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# payload[i+1] = 0x00
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#msg = self.BTLEMessage(self, cmd, payload)
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if not success: raise self.SendMessageFailed
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if self.name != newName: raise self.NotLoggedIn
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@property
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def connected(self):
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try:
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return "conn" in self._btle_device.status().get("state")
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except:
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return False
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def reconnect(self):
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self.disconnect()
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self.connect()
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if not self.connected:
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raise self.NotConnectedException
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def connect(self):
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self.disconnect()
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self._btle_device.connect(self.mac_address)
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self._btle_handler = self.BTLEHandler(self)
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self._custom_service = self._btle_device.getServiceByUUID(0xfff0)
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self._read_char = self._custom_service.getCharacteristics("0000fff1-0000-1000-8000-00805f9b34fb")[0]
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self._write_char = self._custom_service.getCharacteristics("0000fff3-0000-1000-8000-00805f9b34fb")[0]
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self._notify_char = self._custom_service.getCharacteristics("0000fff4-0000-1000-8000-00805f9b34fb")[0]
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self._name_char = self._custom_service.getCharacteristics("0000fff6-0000-1000-8000-00805f9b34fb")[0]
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self._btle_device.setDelegate(self._btle_handler)
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def disconnect(self):
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if self.connected == True:
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self._btle_device.disconnect()
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#def SynVer(self):
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# print("SynVer")
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# self.read_char.read_value()
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#def GetSynConfig(self):
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# print("GetSynConfig")
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# #15, 5, 16, 0, 0, 0, 17, -1, -1
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# self.write_char.write_value(bytearray(b'\x0f\x05\x10\x00\x00\x00\x11\xff\xff'))
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#def ______RESET(self):
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# #15, 5, 16, 0, 0, 0, 17, -1, -1 ??? maybe reset?
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# pass
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#def GetSN(self):
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# print("GetSN")
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# #15, 5, 17, 0, 0, 0, 18, -1, -1
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# self.write_char.write_value(bytearray(b'\x0f\x05\x11\x00\x00\x00\x12\xff\xff'))
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# self.SynVer()
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# self.notify_char.enable_notifications()
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# self.Login("1337")
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# self.GetSynConfig()
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# #self.GetSN()
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class NotConnectedException(Exception):
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pass
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class SendMessageFailed(Exception):
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pass
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class NotLoggedIn(Exception):
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pass
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class BTLEMessage():
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MAGIC_START = bytearray([0x0f])
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MAGIC_END = bytearray([0xff, 0xff])
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__data = bytearray()
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__cmd = bytearray(1) # cmd cannot be empty
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__payload = bytearray()
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def __init__(self, btle_device, cmd=bytearray(), payload=bytearray()):
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self.__btle_device = btle_device
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self.cmd = cmd
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self.payload = payload
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@property
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def cmd(self):
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return self.__cmd
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@cmd.setter
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def cmd(self, cmd):
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self.__data = self.MAGIC_START + bytearray(1) + cmd + self.__payload + bytearray(1) + self.MAGIC_END
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self.__cmd = cmd
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self.__calc_length()
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self.__calc_checksum()
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@property
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def payload(self):
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return self.__payload
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@payload.setter
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def payload(self, payload):
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self.__data = self.MAGIC_START + bytearray(1) + self.__cmd + payload + bytearray(1) + self.MAGIC_END
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self.__payload = payload
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self.__calc_length()
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self.__calc_checksum()
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def __calc_checksum(self):
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checksum = 1
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for i in range(2, self.__data[1] + 2):
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checksum += self.__data[i]
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self.__data[-3] = checksum & 0xff
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def __calc_length(self):
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self.__data[1] = 1 + len(self.__payload) + 1 # cmd + payload + checksum
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def send(self):
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if not self.__btle_device.connected:
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self.__btle_device.reconnect()
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self.__btle_device._write_char.write(self.__data, True)
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return self.__btle_device._btle_device.waitForNotifications(5)
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class BTLEHandler(btle.DefaultDelegate):
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def __init__(self, btle_device):
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btle.DefaultDelegate.__init__(self)
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self.__btle_device = btle_device
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def handleNotification(self, cHandle, data):
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if len(data) <= 3:
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print("Notification data seems invalid or incomplete. Could not parse: ", end="")
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print(data)
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return
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message_type = data[2]
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if message_type == 0x00:
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if data[4] == 0x01:
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print("Checksum error!")
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else:
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print("Unknown error:", data)
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elif message_type == 0x01: #sync time response
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if not data[3:] == b'\x00\x00\x02\xff\xff':
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print("Time synced failed with unknown data: ", end="")
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print(data)
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elif message_type == 0x02: #set name response
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if not data[3:] == b'\x00\x00\x03\xff\xff':
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print("Set name failed with unknown data: ", end="")
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print(data)
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elif message_type == 0x03: #switch toggle response
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self.__btle_device.getStatus()
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elif message_type == 0x04: #status related response
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voltage = data[8]
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current = (data[9] << 8 | data[10]) / 1000
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power = (data[5] << 16 | data[6] << 8 | data[7]) / 1000
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total_power = (data[14] << 24 | data[15] << 16 | data[16] << 8 | data[17]) / 1000
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self.__btle_device.voltage = voltage
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self.__btle_device.current = current
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self.__btle_device.power = power
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self.__btle_device.frequency = data[11]
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self.__btle_device.powered = bool(data[4])
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self.__btle_device.total_power = total_power
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# calculated values
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try:
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self.__btle_device.power_factor = power / (voltage * current)
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except ZeroDivisionError:
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self.__btle_device.power_factor = None
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elif message_type == 0x17: #authentication related response
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if data[5] == 0x00 or data[5] == 0x01:
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# in theory the fifth byte indicates a login attempt response (0) or a response to a password change (1)
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# but since a password change requires a valid login and a successful password changes logs you in,
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# we can just ignore this bit and set the authenticated flag accordingly for both responses
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self.__btle_device.authenticated = not data[4]
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else:
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print("5th byte of login-response is > 1:", data)
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elif message_type == 0x0f: #set icon response
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if not data[3:] == b'\x00\x03\x00\x13\xff\xff':
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print("Unknown response for setting icon: ", end="")
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print(data[3:])
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else:
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print ("Unknown message from Handle: 0x" + format(cHandle,'02X') + " Value: "+ format(data))
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