imported
flowswitch
parent
d6d9b93a10
commit
856a226b6f
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@ -1,2 +1,8 @@
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# py9b
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Ninebot/Xiaomi electric scooter communication library
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## Requirements
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* Python 2.6.x [www.python.org]
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* PySerial [pip install pyserial] - for direct serial link backend
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* PyGatt [pip install pygatt] - for BLED112 dongle backend
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* nRFUARTBridge [https://github.com/flowswitch/nRFUARTBridge] - for Android BLE-TCP backend
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@ -0,0 +1,34 @@
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class LinkTimeoutException(Exception):
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pass
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class LinkOpenException(Exception):
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pass
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class BaseLink(object):
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DEF_TIMEOUT = 1
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def __init__(self, timeout=DEF_TIMEOUT, dump=False):
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self.dump = dump
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self.timeout = timeout
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def scan(self):
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raise NotImplementedError()
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def open(self, port):
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raise NotImplementedError()
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def close(self):
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pass
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def read(self, size):
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raise NotImplementedError()
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def write(self, data):
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raise NotImplementedError()
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__all__ = ["LinkTimeoutException", "LinkOpenException", "BaseLink"]
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"""BLE link using BlueGiga adapter via PyGatt/BGAPI"""
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from __future__ import absolute_import
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import pygatt
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from binascii import hexlify
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SCAN_TIMEOUT = 3
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class BLELink():
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def __init__(self, dump=False):
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self.dev = None
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self.dump = dump
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def __enter__(self):
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self.adapter = pygatt.BGAPIBackend()
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self.adapter.start()
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return self
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def __exit__(self, exc_type, exc_value, traceback):
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self.close()
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def scan(self):
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res = []
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devices = self.adapter.scan(timeout=SCAN_TIMEOUT)
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for dev in devices:
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if dev["name"].startswith(u"MISc"):
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res.append((dev["name"], dev["address"]))
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return res
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def open(self, port):
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self.dev = self.adapter.connect(port, address_type=pygatt.BLEAddressType.random)
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def close(self):
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if self.dev:
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self.dev.disconnect()
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self.dev = None
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self.adapter.stop()
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def read(self, size):
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data = self.dev.read(size)
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if self.dump:
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print "<", hexlify(data).upper()
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return data
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def write(self, data):
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if self.dump:
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print ">", hexlify(data).upper()
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return self.dev.write(data)
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__all__ = ["BLELink"]
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@ -0,0 +1,61 @@
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"""Direct serial link"""
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from __future__ import absolute_import
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import serial
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import serial.tools.list_ports as lp
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from binascii import hexlify
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from .base import BaseLink, LinkTimeoutException, LinkOpenException
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class SerialLink():
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def __init__(self, *args, **kwargs):
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super(SerialLink, self).__init__(*args, **kwargs)
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self.com = None
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def __enter__(self):
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return self
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def __exit__(self, exc_type, exc_value, traceback):
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self.close()
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def scan(self):
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ports = lp.comports()
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res = [(port.device, "%04X:%04X" % (port.vid, port.pid)) for port in ports]
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return res
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def open(self, port):
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try:
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self.com = serial.Serial(port, 115200, parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE, timeout=self.timeout)
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except serial.SerialException:
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raise LinkOpenException
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def close(self):
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if self.com:
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self.com.close()
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self.com = None
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def read(self, size):
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try:
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data = self.com.read(size)
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except serial.SerialTimeoutException:
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raise LinkTimeoutException
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if len(data)<size:
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raise LinkTimeoutException
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if self.dump:
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print "<", hexlify(data).upper()
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return data
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def write(self, data):
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if self.dump:
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print ">", hexlify(data).upper()
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self.com.write(data)
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__all__ = ["SerialLink"]
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"""TCP-BLE bridge link"""
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from __future__ import absolute_import
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import socket
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from binascii import hexlify
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from .base import BaseLink, LinkTimeoutException, LinkOpenException
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HOST, PORT = "127.0.0.1", 6000
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def recvall(sock, size):
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data = ""
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while len(data)<size:
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try:
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pkt = sock.recv(size-len(data))
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except socket.timeout:
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raise LinkTimeoutException()
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data+=pkt
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return data
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class TCPLink(BaseLink):
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def __init__(self, *args, **kwargs):
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super(TCPLink, self).__init__(*args, **kwargs)
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self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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self.sock.settimeout(self.timeout)
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self.connected = False
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def __enter__(self):
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return self
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def __exit__(self, exc_type, exc_value, traceback):
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self.close()
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def scan(self):
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res = [("Android UART Bridge", (HOST, PORT))]
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return res
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def open(self, port):
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try:
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self.sock.connect(port)
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except socket.timeout:
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raise LinkOpenException
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self.connected = True
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def close(self):
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if self.connected:
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self.sock.close()
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self.connected = False
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def read(self, size):
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data = recvall(self.sock, size)
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if data and self.dump:
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print "<", hexlify(data).upper()
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return data
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def write(self, data):
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if self.dump:
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print ">", hexlify(data).upper()
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self.sock.sendall(data)
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__all__ = ["TCPLink"]
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"""Transport abstract class"""
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def checksum(data):
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s = 0
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for c in data:
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s += ord(c)
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return (s & 0xFFFF) ^ 0xFFFF
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class BaseTransport(object):
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DEV01 = 1
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ESC = 0x20
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BLE = 0x21
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BMS = 0x22
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HOST = 0x3E
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def __init__(self, link):
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self.link = link
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def recv(self):
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raise NotImplementedError()
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def send(self, src, dst, cmd, param, data=""):
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raise NotImplementedError()
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__all__ = ["checksum", "BaseTransport"]
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from binascii import hexlify
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class BasePacket(object):
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def __init__(self, src=0, dst=0, cmd=0, reg=0, data=""):
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self.src = src
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self.dst = dst
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self.cmd = cmd
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self.reg = reg
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self.data = data
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def __str__(self):
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return "%02X->%02X: %02X @%02X %s" % (self.src, self.dst, self.cmd, self.reg, hexlify(self.data).upper())
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__all__ = ["BasePacket"]
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"""Xiaomi packet transport"""
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from struct import pack, unpack
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from .base import checksum, BaseTransport as BT
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from .packet import BasePacket
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class XiaomiTransport(BT):
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HEAD2ESC = 0x20
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ESC2HEAD = 0x23
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HEAD2BMS = 0x22
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BMS2HEAD = 0x25
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DEV01 = 0x01
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_SaDa2Addr = { BT.HOST : { BT.DEV01 : DEV01, BT.ESC : HEAD2ESC, BT.BMS : HEAD2BMS },
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BT.ESC : { BT.HOST : ESC2HEAD, BT.BMS : HEAD2BMS, BT.DEV01 : DEV01 },
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BT.BMS : { BT.HOST : BMS2HEAD, BT.ESC : BMS2HEAD, BT.DEV01 : DEV01 },
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BT.DEV01 : {BT.HOST : DEV01, BT.ESC : DEV01, BT.BMS : DEV01 } }
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# TBC
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_BleAddr2SaDa = { HEAD2ESC : (BT.HOST, BT.ESC),
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ESC2HEAD : (BT.ESC, BT.HOST),
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HEAD2BMS : (BT.HOST, BT.BMS),
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BMS2HEAD : (BT.BMS, BT.HOST),
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DEV01 : (BT.DEV01, BT.HOST) }
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_BmsAddr2SaDa = { HEAD2ESC : (BT.BMS, BT.ESC),
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ESC2HEAD : (BT.ESC, BT.BMS),
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HEAD2BMS : (BT.ESC, BT.BMS),
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BMS2HEAD : (BT.BMS, BT.ESC),
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DEV01 : (BT.DEV01, BT.BMS) }
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def __init__(self, link, device=BT.HOST):
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super(XiaomiTransport, self).__init__(link)
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self.device = device
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def _make_addr(self, src, dst):
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return XiaomiTransport._SaDa2Addr[src][dst]
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def _split_addr(self, addr):
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if self.device==BT.BMS:
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return XiaomiTransport._BmsAddr2SaDa[addr]
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else:
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return XiaomiTransport._BleAddr2SaDa[addr]
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def _wait_pre(self):
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while True:
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while True:
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c = self.link.read(1)
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if c=="\x55":
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break
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while True:
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c = self.link.read(1)
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if c=="\xAA":
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return True
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if c!="\x55":
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break # start waiting 55 again, else - this is 55, so wait for AA
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def recv(self):
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self._wait_pre()
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pkt = self.link.read(1)
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l = ord(pkt)+3
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for i in xrange(l):
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pkt += self.link.read(1)
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ck_calc = checksum(pkt[0:-2])
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ck_pkt = unpack("<H", pkt[-2:])[0]
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if ck_pkt!=ck_calc:
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print "Checksum mismatch !"
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return None
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sa, da = self._split_addr(ord(pkt[1]))
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return BasePacket(sa, da, ord(pkt[2]), ord(pkt[3]), pkt[4:-2]) # sa, da, cmd, param, data
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def send(self, packet):
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dev = self._make_addr(packet.src, packet.dst)
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pkt = pack("<BBBB", len(packet.data)+2, dev, packet.cmd, packet.reg)+packet.data
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pkt = "\x55\xAA" + pkt + pack("<H", checksum(pkt))
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self.link.write(pkt)
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__all__ = ["XiaomiTransport"]
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@ -0,0 +1,29 @@
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from py9b.link.base import LinkOpenException, LinkTimeoutException
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from py9b.link.tcp import TCPLink
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from py9b.transport.base import BaseTransport as BT
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from py9b.transport.packet import BasePacket as PKT
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from py9b.transport.xiaomi import XiaomiTransport
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#link = SerialLink()
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with TCPLink() as link:
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ports = link.scan()
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print ports
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tran = XiaomiTransport(link)
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#link.open(("192.168.1.45", 6000))
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link.open(ports[0][1])
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#req = PKT(src=BT.HOST, dst=BT.ESC, cmd=0x01, reg=0x10, data="\x10")
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req = PKT(src=BT.HOST, dst=BT.BMS, cmd=0x01, reg=0x10, data="\x10")
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while raw_input("Press ENTER to send...")!="q":
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tran.send(req)
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try:
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rsp = tran.recv()
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except LinkTimeoutException:
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print "No response"
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continue
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print rsp
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link.close()
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