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first draft of exiConnector to OpenV2G executable
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uhi22
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# EXI is specified in w3.org/TR/exi
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# To decode and encode, we can use this Decoder/Encoder: https://github.com/FlUxIuS/V2Gdecoder
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#
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# https://github.com/FlUxIuS/V2Gdecoder/releases
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# Install java from https://www.java.com/de/download/manual.jsp
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#
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# C:\>java -version
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# java version "1.8.0_351"
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# Java(TM) SE Runtime Environment (build 1.8.0_351-b10)
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# Java HotSpot(TM) Client VM (build 25.351-b10, mixed mode, sharing)
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# C:\>
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#
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# In wireshark: Copy as hex stream
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# 01fe8001000000228000dbab9371d3234b71d1b981899189d191818991d26b9b3a232b30020000040040
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# remove the 8 bytes V2GTP header
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# 8000dbab9371d3234b71d1b981899189d191818991d26b9b3a232b30020000040040
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#
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# java -jar V2Gdecoder.jar -e -s 8000dbab9371d3234b71d1b981899189d191818991d26b9b3a232b30020000040040
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# ERROR: 'Premature EOS found while reading data.'
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# <?xml version="1.0" encoding="UTF-8"?><ns4:supportedAppProtocolReq xmlns:ns4="urn:iso:15118:2:2010:AppProtocol"
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# xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ns3="http://www.w3.org/2001/XMLSchema">
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# <AppProtocol>
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# <ProtocolNamespace>urn:din:70121:2012:MsgDef</ProtocolNamespace>
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# <VersionNumberMajor>2</VersionNumberMajor>
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# <VersionNumberMinor>0</VersionNumberMinor>
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# <SchemaID>1</SchemaID>
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# <Priority>1</Priority>
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# </AppProtocol>
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# </ns4:supportedAppProtocolReq>
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#
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#
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#
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#
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from helpers import showAsHex
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# Example: This is the first message from the EVCC.
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# Means: It is an supportedAppProtocolReq message. It provides a list of charging protocols supported by the EVCC.
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#
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#
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v2gframe = [
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0x01, 0xfe,
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0x80, 0x01,
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0x00, 0x00, 0x00, 0x22,
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0x80, 0x00, 0xdb, 0xab, 0x93, 0x71, 0xd3, 0x23, 0x4b, 0x71, 0xd1, 0xb9, 0x81, 0x89,
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0x91, 0x89, 0xd1, 0x91, 0x81, 0x89, 0x91, 0xd2, 0x6b, 0x9b, 0x3a, 0x23, 0x2b, 0x30, 0x02, 0x00,
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0x00, 0x04, 0x00, 0x40 ]
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if (len(v2gframe)<9):
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print("size too small")
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else:
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if ((v2gframe[0]!=0x01) or (v2gframe[1]!=0xFE)):
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print("wrong V2GTP version")
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else:
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if ((v2gframe[2]!=0x80) or (v2gframe[3]!=0x01)):
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print("wrong payload type, expecting 0x8001 EXI")
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else:
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exiLen = (v2gframe[4]<<24) + (v2gframe[5]<<16) + (v2gframe[6]<<8) + v2gframe[7]
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print("exiLen=" + str(exiLen))
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if (exiLen+8 != len(v2gframe)):
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print("exiLen does not match actual frame size")
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else:
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print("header ok")
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exiframe = bytearray(exiLen)
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exiframe = v2gframe[8:]
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showAsHex(exiframe, "exiframe ")
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# Header:
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# 80 upper two bits: distinguishing bits 1 0
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# presenceBitForExiOptions 0 means "no options"
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# five bits version information: 0 0 0 0 0 means "final version 1"
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#
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# 00 DB AB 93 71 D3 23 4B
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90
exiConnector.py
Normal file
90
exiConnector.py
Normal file
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@ -0,0 +1,90 @@
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# EXI is specified in w3.org/TR/exi
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# For decoding and encoding, different decoders are availabe:
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# 1. https://github.com/FlUxIuS/V2Gdecoder
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# https://github.com/FlUxIuS/V2Gdecoder/releases
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# Install java from https://www.java.com/de/download/manual.jsp
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#
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# C:\>java -version
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# java version "1.8.0_351"
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# Java(TM) SE Runtime Environment (build 1.8.0_351-b10)
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# Java HotSpot(TM) Client VM (build 25.351-b10, mixed mode, sharing)
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# C:\>
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#
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# java -jar V2Gdecoder.jar -e -s 8000dbab9371d3234b71d1b981899189d191818991d26b9b3a232b30020000040040
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# ERROR: 'Premature EOS found while reading data.'
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# <?xml version="1.0" encoding="UTF-8"?><ns4:supportedAppProtocolReq xmlns:ns4="urn:iso:15118:2:2010:AppProtocol"
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# xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ns3="http://www.w3.org/2001/XMLSchema">
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# <AppProtocol>
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# <ProtocolNamespace>urn:din:70121:2012:MsgDef</ProtocolNamespace>
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# <VersionNumberMajor>2</VersionNumberMajor>
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# <VersionNumberMinor>0</VersionNumberMinor>
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# <SchemaID>1</SchemaID>
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# <Priority>1</Priority>
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# </AppProtocol>
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# </ns4:supportedAppProtocolReq>
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#
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# 2. OpenV2G from https://github.com/Martin-P/OpenV2G
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# Pro: The schema-specific files are already included as generated C-code, this
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# makes it very fast.
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# Contra: Is only a demo, does not provide an interface which could be used for decoding/encoding.
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# Work in progress: Fork in https://github.com/uhi22/OpenV2Gx, to add a command line interface (and maybe a socket interface).
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#
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#
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# Example data:
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# (1) From the Ioniq:
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# In wireshark: Copy as hex stream
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# 01fe8001000000228000dbab9371d3234b71d1b981899189d191818991d26b9b3a232b30020000040040
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# remove the 8 bytes V2GTP header
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# 8000dbab9371d3234b71d1b981899189d191818991d26b9b3a232b30020000040040
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# (2) From OpenV2G main_example.appHandshake()
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# 8000ebab9371d34b9b79d189a98989c1d191d191818981d26b9b3a232b30010000040001b75726e3a64696e3a37303132313a323031323a4d73674465660020000100880
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#
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#
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#
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#
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#
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from helpers import showAsHex, twoCharHex
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import subprocess
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import sys
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import time
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if __name__ == "__main__":
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# Example: This is the first message from the EVCC.
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# Means: It is an supportedAppProtocolReq message. It provides a list of charging protocols supported by the EVCC.
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#
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#
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exiframe = [
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0x80, 0x00, 0xdb, 0xab, 0x93, 0x71, 0xd3, 0x23, 0x4b, 0x71, 0xd1, 0xb9, 0x81, 0x89,
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0x91, 0x89, 0xd1, 0x91, 0x81, 0x89, 0x91, 0xd2, 0x6b, 0x9b, 0x3a, 0x23, 0x2b, 0x30, 0x02, 0x00,
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0x00, 0x04, 0x00, 0x40 ]
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print("Testing the exiConnector...")
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pathToOpenV2GExe = "..\\OpenV2Gx\\Release\\OpenV2G.exe";
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s = ""
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for i in range(0, len(exiframe)):
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s = s + twoCharHex(exiframe[i])
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print("exi as hex=" + s)
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param1 = "DH" + s # DH for decode handshake
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start_time = time.time()
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for i in range(0, 10):
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result = subprocess.run(
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[pathToOpenV2GExe, param1], capture_output=True, text=True)
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print("--- %s seconds ---" % (time.time() - start_time))
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print("stdout:", result.stdout)
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print("stderr:", result.stderr)
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strConverterResult = result.stdout
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if (strConverterResult.find("ProtocolNamespace=urn:din")>0):
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print("Detected DIN")
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param1 = "ED1" # ED for encode DIN, session setup response
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result = subprocess.run([pathToOpenV2GExe, param1], capture_output=True, text=True)
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print("stdout:", result.stdout)
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print("stderr:", result.stderr)
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