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uhi22 2022-10-19 19:31:21 +02:00
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## 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
@ -75,6 +80,8 @@ This is fighting against the Libpcap-installation, so we need to deinstall the s
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)
@ -86,5 +93,21 @@ for ts, pkt in sniffer:
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)