github-mirrors/pyPLC
1
0
Fork 0
mirror of https://github.com/uhi22/pyPLC.git synced 2024-11-10 01:05:42 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

added status

Browse source
This commit is contained in:
uhi22 2022-10-19 19:31:21 +02:00
parent 28a713c32e
commit 98c569597b
1 changed files with 47 additions and 24 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

71
readme.md
View file

@ -3,6 +3,11 @@
## Goal
This project tries to use cheap powerline network adaptors for communication with electric cars charging system.
There are three different use cases, where this project can be helpful:
1. Sniffing the traffic between an CCS charger and a car. For instance to measure which side is the limiting element for reduced charging power.
2. Building a charger for CCS or for AC with digital communication.
3. Building a charging unit for a car which does not support powerline communication.
## References
[i] https://www.goingelectric.de/wiki/CCS-Technische-Details/
[ii] https://openinverter.org/forum/viewtopic.php?p=37085#p37085
@ -32,29 +37,29 @@ It is worth to read its documentation, starting in docbook/index.html, this cont
(Tested on Linux/Raspbian on a raspberryPi 3)
Find the PLC adaptor
pi@RPi3D:~ $ int6klist -ieth0 -v
pi@RPi3D:~ $ int6klist -ieth0 -v
This shows the software version and the mac address.
Read the configuration from the PLC adaptor and write it to a file
pi@RPi3D:~ $ plctool -ieth0 -p original.pib 98:48:27:5A:3C:E6
eth0 98:48:27:5A:3C:E6 Read Module from Memory
pi@RPi3D:~ $ plctool -ieth0 -p original.pib 98:48:27:5A:3C:E6
eth0 98:48:27:5A:3C:E6 Read Module from Memory
Patch the configuration file (aee /docbook/ch05s15.html). For each side (pev (vehicle) and evse (charger)) there is a special configuration.
Example pev side:
pi@RPi3D:~ $ cp original.pib pev.pib
pi@RPi3D:~ $ setpib pev.pib 74 hfid "PEV"
pi@RPi3D:~ $ setpib pev.pib F4 byte 1
pi@RPi3D:~ $ setpib pev.pib 1653 byte 1
pi@RPi3D:~ $ setpib pev.pib 1C98 long 10240 long 102400
pi@RPi3D:~ $ cp original.pib pev.pib
pi@RPi3D:~ $ setpib pev.pib 74 hfid "PEV"
pi@RPi3D:~ $ setpib pev.pib F4 byte 1
pi@RPi3D:~ $ setpib pev.pib 1653 byte 1
pi@RPi3D:~ $ setpib pev.pib 1C98 long 10240 long 102400
Write the configuration file to the PLC adaptor
pi@RPi3D:~ $ plctool -ieth0 -P pev.pib 98:48:27:5A:3C:E6
eth0 98:48:27:5A:3C:E6 Start Module Write Session
eth0 98:48:27:5A:3C:E6 Flash pev.pib
...
eth0 98:48:27:5A:3C:E6 Close Session
eth0 98:48:27:5A:3C:E6 Reset Device
eth0 98:48:27:5A:3C:E6 Resetting ...
pi@RPi3D:~ $ plctool -ieth0 -P pev.pib 98:48:27:5A:3C:E6
eth0 98:48:27:5A:3C:E6 Start Module Write Session
eth0 98:48:27:5A:3C:E6 Flash pev.pib
...
eth0 98:48:27:5A:3C:E6 Close Session
eth0 98:48:27:5A:3C:E6 Reset Device
eth0 98:48:27:5A:3C:E6 Resetting ...
The open-plc-utils contain the programs evse and pev, which can be used for try-out of the functionality, using two PLC adaptors.
@ -70,21 +75,39 @@ Attention: There are (at least) three different python-libs available for pcap:
- Pypcap (recommented on https://stackoverflow.com/questions/63941109/pcap-open-live-issue)
- Pcap-ct (https://pypi.org/project/pcap-ct/)
We use the last one.
python -m pip install --upgrade pcap-ct
python -m pip install --upgrade pcap-ct
This is fighting against the Libpcap-installation, so we need to deinstall the second:
python -m pip uninstall libpcap
python -m pip uninstall libpcap
Then again install pcap-ct, and finally add in the libpcap\_platform\__init__py the missing is_osx = False. (Is in the meanwhile fixed in the github repository.)
Finally, we need to patch the Pcap-ct, because the python script needs a non-blocking version. This is discussed in https://github.com/karpierz/pcap-ct/issues/9
Now, in the IDLE shall 3.10.6, the import works:
import pcap
sniffer = pcap.pcap(name=None, promisc=True, immediate=True, timeout_ms=50)
addr = lambda pkt, offset: '.'.join(str(pkt[i]) for i in range(offset, offset + 4))
for ts, pkt in sniffer:
print('%d\tSRC %-16s\tDST %-16s' % (ts, addr(pkt, sniffer.dloff + 12), addr(pkt, sniffer.dloff + 16)))
import pcap
sniffer = pcap.pcap(name=None, promisc=True, immediate=True, timeout_ms=50)
addr = lambda pkt, offset: '.'.join(str(pkt[i]) for i in range(offset, offset + 4))
for ts, pkt in sniffer:
print('%d\tSRC %-16s\tDST %-16s' % (ts, addr(pkt, sniffer.dloff + 12), addr(pkt, sniffer.dloff + 16)))
### Usage on Raspberry
Pcap-ct does not work with Python 3.4. After update to Python 3.8, it works.
## Further steps
(to be continued)
## Change history / functional status
### 2022-10-19 Communication with Ioniq car established
* Using a TPlink TL-PA4010P with firmware MAC-QCA7420-1.4.0.20-00-20171027-CS and the PIB configuration file patched for evse according to the open-plc-utils docu.
* Python software running on Win10, Python 3.10.8
* On control pilot, sending 5% PWM to initiate digital communication with the car
* Since the TPlink is configured as coordinator, it sends "alive" messages, and the IONIQ starts sending the SLAC_PARAM.REQ.
* Per keystroke, we trigger a SET_KEY before the car is connected. The TPlink responds with "rejected", but this is normal, the LEDs are turning off and on, key is accepted.
* Python script interprets the relevant incoming messages (SLAC_PARAM.REQ, MNBC_SOUND.IND, SLAC_MATCH.REQ) and reacts accordingly.
* After successfull SLAC sequence, all three LEDs on the TPlink are ON, means: Network is established.
* In wireshark, we see that the car is sending UDP multicast messages to destination port 15118. This looks like a good sign, that it wants a ISO15118 compatible communication.
### 2022-10-19 Sniffing mode not yet working with the TPlink adaptors
* with a Devolo dLAN 200 AVplus, software INT6000-MAC-4-4-4405-00-4497-20101201-FINAL-B in original parametrization, it is possible
to see the complete SLAC traffic (both directions) which sniffing the communication between a real charger and a real car. This does
NOT work with the TPlink adaptors. They route only "their own" direction of the traffic to the ethernet. Means: The pev-configured device
does not see the real car, and the evse-configured device does not see the real charger. This is bad for sniffing.
(further steps ongoing)