Merge branch 'btledev_private' of sqozz/sem6000 into master
This cleans up some rough edges of the initial version. 1. Reconnect support introduces better handling of missing or misbehaving wall sockets. 2. Variable visibility for the internally used ble characteristics just give the reader a slight clue about their (un)importance for them. 3. Variable access was cleaned up to use the provided setter for cmd and payload. 4. Some spaghetti code got slightly more readable. 5. Finally, graceful handling of disconnects is now possible. This allows short lived scripts (e.g. home-assistant components) to access multiple sockets with the same BLE adapter.
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Gitea
commit
8b7e88db74
2 changed files with 161 additions and 122 deletions
29
example.py
29
example.py
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@ -1,16 +1,23 @@
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from sem6000 import SEMSocket
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import time
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socket = SEMSocket('f0:c7:7f:0d:e7:17')
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from sem6000 import SEMSocket
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socket.login("1337")
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socket.changePassword("1234")
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socket.login("1234")
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#socket.changePassword("1337")
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# auto_reconnect_timeout enabled auto reconnect if sending a command fails. Valid values:
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# None (default): everything that fails throws NotConnectedException's
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# -1: infinite retries
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# integer: seconds before exception is thrown
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socket = SEMSocket('f0:c7:7f:0d:e7:17', auto_reconnect_timeout=None)
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#socket.login("1337")
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#socket.changePassword("1234")
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#socket.login("1234")
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while True:
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break;
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time.sleep(1)
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socket.getStatus()
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socket.setStatus(True)
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print("=== {} ({}) ===".format(socket.mac_address, "on" if socket.powered else "off"))
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print("\t{}V {}A → {}W@{}Hz".format(socket.voltage, socket.current, socket.power, socket.frequency))
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try:
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socket.getStatus()
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socket.setStatus(True)
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print("=== {} ({}) ===".format(socket.mac_address, "on" if socket.powered else "off"))
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print("\t{}V {}A → {}W@{}Hz".format(socket.voltage, socket.current, socket.power, socket.frequency))
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except SEMSocket.NotConnectedException:
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socket.reconnect(-1) #infinite reconnect attempts
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254
sem6000.py
254
sem6000.py
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@ -1,11 +1,10 @@
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from bluepy import btle
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import struct
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import time
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import pdb
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import uuid
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class SEMSocket():
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password = "0000"
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auto_reconnect_timeout = None
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powered = False
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voltage = 0
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current = 0
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@ -13,104 +12,21 @@ class SEMSocket():
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frequency = 0
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mac_address = ""
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custom_service = 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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_read_char = None
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_write_char = None
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_notify_char = None
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_btle_device = None
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def __init__(self, mac):
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def __init__(self, mac, auto_reconnect_timeout = None):
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self.mac_address = mac
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self.btle_device = btle.Peripheral(self.mac_address,addrType=btle.ADDR_TYPE_PUBLIC,iface=0)
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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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print(self.read_char.read())
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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.btle_device.setDelegate(self.btle_handler)
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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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self.__btle_device.write_char.write(self.__data, True)
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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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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 == 0x03: #switch toggle
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print("Switch toggled")
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self.btle_device.getStatus()
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elif message_type == 0x04: #status related data
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self.btle_device.voltage = data[8]
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self.btle_device.current = (data[9] << 8 | data[10]) / 1000
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self.btle_device.power = (data[5] << 16 | data[6] << 8 | data[7]) / 1000
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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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elif message_type == 0x17:
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if data[5] == 0x00 or data[5] == 0x01:
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if not data[4]:
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print("Login successful")
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else:
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print("Login failed")
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else:
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print("5th byte of login-response is > 1:", data)
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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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self.auto_reconnect_timeout = auto_reconnect_timeout
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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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print("GetStatus")
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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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@ -118,7 +34,6 @@ class SEMSocket():
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msg.send()
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def setStatus(self, status):
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print("SetStatus:", 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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@ -127,16 +42,13 @@ class SEMSocket():
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msg.send()
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def login(self, password):
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print("Login")
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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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payload.append(int(self.password[0]))
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payload.append(int(self.password[1]))
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payload.append(int(self.password[2]))
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payload.append(int(self.password[3]))
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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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@ -145,23 +57,61 @@ class SEMSocket():
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msg.send()
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def changePassword(self, newPassword):
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print("Change 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(0x01)
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payload.append(int(newPassword[0]))
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payload.append(int(newPassword[1]))
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payload.append(int(newPassword[2]))
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payload.append(int(newPassword[3]))
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payload.append(int(self.password[0]))
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payload.append(int(self.password[1]))
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payload.append(int(self.password[2]))
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payload.append(int(self.password[3]))
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for i in range(4):
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payload.append(int(self.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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msg.send()
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@property
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def connected(self):
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try:
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if "conn" in self._btle_device.status().get("state"):
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return True
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else:
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return False
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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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def reconnect(self, timeout = None):
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if timeout == None:
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self.__reconnect()
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else:
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reconnect_start = time.time()
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while abs(reconnect_start - time.time()) < timeout or timeout == -1:
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self.__reconnect()
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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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if not self._btle_device:
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self._btle_device = btle.Peripheral(self.mac_address,addrType=btle.ADDR_TYPE_PUBLIC,iface=0)
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else:
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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._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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@ -186,4 +136,86 @@ class SEMSocket():
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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 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(self.__btle_device.auto_reconnect_timeout)
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self.__btle_device._write_char.write(self.__data, True)
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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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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 == 0x03: #switch toggle
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print("Switch toggled")
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self.__btle_device.getStatus()
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elif message_type == 0x04: #status related data
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self.__btle_device.voltage = data[8]
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self.__btle_device.current = (data[9] << 8 | data[10]) / 1000
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self.__btle_device.power = (data[5] << 16 | data[6] << 8 | data[7]) / 1000
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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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elif message_type == 0x17:
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if data[5] == 0x00 or data[5] == 0x01:
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if data[4]:
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print("Login failed")
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else:
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print("5th byte of login-response is > 1:", data)
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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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