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exiconnector made compatible for Raspberry
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uhi22
parent
e4a7cd3373
commit
f61f68a0ab
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@ -14,64 +14,72 @@ Start putty and connect to the raspberry.
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Install samba server on the raspberry, to be able to access the files from remote. https://www.elektronik-kompendium.de/sites/raspberry-pi/2007071.htm
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Install wireshark
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sudo apt-get install wireshark
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```
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sudo apt-get install wireshark
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```
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Choose "yes" for the question whether other users shall be able to trace network traffic.
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cd $home
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mkdir myprogs
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cd myprogs
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git clone http://github.com/uhi22/pyPlc
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git clone http://github.com/uhi22/OpenV2Gx
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cd OpenV2Gx/Release
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make
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Clone the two github repositories, and compile the OpenV2Gx EXI decoder/encoder:
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```
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cd $home
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mkdir myprogs
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cd myprogs
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git clone http://github.com/uhi22/pyPlc
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git clone http://github.com/uhi22/OpenV2Gx
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cd OpenV2Gx/Release
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make
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```
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(this may take some minutes)
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(In case you later change something in the code, use `make all` to build again.)
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Test the EXI decoder/encoder
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./OpenV2G DD809a0010d0400000c800410c8000
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./OpenV2G EDa
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```
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cd $home/myprogs/OpenV2Gx/Release
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./OpenV2G.exe DD809a0010d0400000c800410c8000
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./OpenV2G.exe EDB_5555aaaa5555aaaa
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```
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This should run without error and show the decoded/encoded data in the command window.
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cd $home/myprogs/pyPlc
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Now we go to the python part.
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```
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cd $home/myprogs/pyPlc
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```
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Check python version
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python --version
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`python --version`
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reports e.g. 3.9.2.
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Install the python library for accessing the network interface:
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python -m pip install --upgrade pcap-ct
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also for the superuser (otherwise the import pcap fails)
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sudo python -m pip install --upgrade pcap-ct
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Install the python library for accessing the network interface.
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Also for the superuser (otherwise the import pcap fails).
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```
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python -m pip install --upgrade pcap-ct
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sudo python -m pip install --upgrade pcap-ct
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```
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Try-out whether the python is able to sniff ethernet packets:
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cd $home/myprogs/pyPlc/tests
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python test_pcap.py
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```
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cd $home/myprogs/pyPlc/tests
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python test_pcap.py
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```
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Result: Fails due to missing permission. This is normal, we need to run with superuser permissions.
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sudo python test_pcap.py
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This should run through loops 0 to 9. If it stucks at Loop 0, the
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patch for non-blocking is missing.
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Patch is not needed if we use self.sniffer.dispatch.
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Patch the pcap-ct for non-blocking usage:
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Navigate to /usr/local/lib/python3.9/dist-packages/pcap
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cd /usr/local/lib/python3.9/dist-packages/pcap
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Open the file _pcap.py with superuser permissions:
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sudo nano _pcap.py
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Scroll to "def __next__".
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Under the condition "if n == 0: # timeout" replace the line
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continue
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by
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raise StopIteration
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This issue is discussed in https://github.com/karpierz/pcap-ct/issues/9.
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Try again
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sudo python test_pcap.py
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```
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sudo python test_pcap.py
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```
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This should run through loops 0 to 9.
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Problem: Each loop needs around 2 seconds. This is not intended. The 10ms timeout
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seems not to work (timeout_ms=10). On win10, this works perfect.
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On Raspberry, the combination of iterator and non-blocking does not work, see
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https://stackoverflow.com/questions/31305712/how-do-i-make-libpcap-pcap-loop-non-blocking.
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Solution: Change to self.sniffer.dispatch instead of for ts, pkt in self.sniffer.
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Try-out the cooperation of Python with the EXI encoder/decoder:
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```
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python exiConnector.py
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```
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This should run some decoder/encoder tests and report in the end "Number of fails: 0".
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Start the EVSE `sudo python pyPlc.py E`.
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Open a second console window, and start here the pev in simulation mode
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`sudo python pyPlc.py P S`.
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We should see how the EVSE and PEV are talking to each other.
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@ -43,6 +43,7 @@ import subprocess
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import sys
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import time
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import json
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import os
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# Example data:
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# (1) From the Ioniq:
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@ -83,7 +84,13 @@ exiHexDemoSupportedApplicationProtocolRequest2="8000ebab9371d34b9b79d189a98989c1
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# Configuration of the exi converter tool
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pathToOpenV2GExe = "..\\OpenV2Gx\\Release\\OpenV2G.exe";
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if os.name == "nt":
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# Windows: Path to the EXI decoder/encoder
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pathToOpenV2GExe = "..\\OpenV2Gx\\Release\\OpenV2G.exe"
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else:
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# Linux: Path to the EXI decoder/encoder
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pathToOpenV2GExe = "../OpenV2Gx/Release/OpenV2G.exe";
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# Functions
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def exiHexToByteArray(hexString):
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@ -235,8 +242,8 @@ def testReadExiFromFile():
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if __name__ == "__main__":
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nFail=0
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print("Testing exiConnector...")
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testReadExiFromFile()
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exit()
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#testReadExiFromFile()
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#exit()
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#testByteArrayConversion("123456")
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#testByteArrayConversion("1234567")
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#testByteArrayConversion("ABCDEF")
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@ -300,4 +307,4 @@ if __name__ == "__main__":
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#strConverterResult = exiDecode(exiHexToByteArray(exiHexDemoSupportedApplicationProtocolRequest2))
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#print(strConverterResult)
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