Search found 105 matches

by CCSknowitall
Sat Jan 20, 2024 10:14 pm
Forum: Charging
Topic: Develop a QCA7000 board?
Replies: 546
Views: 4690984

Re: Develop a QCA7000 board?

The commercial sniffers I am aware of use ether ST or Vertexcom PLC chips, not Qualcomm.
by CCSknowitall
Fri Dec 01, 2023 3:43 am
Forum: Charging
Topic: Drawing power out of CCS port (V2x, inverse charging, bidirectional CCS)
Replies: 29
Views: 17763

Re: Drawing power out of CCS port (V2x, inverse charging, bidirectional CCS)

In your charge parameter discovery response I see the following issues:
Your minimum current limit is 20A - check your multiplier, you probably meant 2A.
Your peak current ripple is 40A, probably meant 4A.
Your PMax is 0 in SAScheduleList. Most EVs ignore this though.
by CCSknowitall
Sun Sep 24, 2023 3:54 pm
Forum: Charging
Topic: Open source CCS using AR7420
Replies: 416
Views: 237322

Re: Open source CCS using AR7420

For the Tesla issue- make sure your modem is ready to start SLAC as soon as you switch to 5% duty cycle. Teslas (and a few others) will almost immediately try to start communicating after 5% starts. Stay in 100% duty for a few seconds beforehand if needed to verify the modem is ready before switchin...
by CCSknowitall
Sat Sep 23, 2023 4:59 am
Forum: Charging
Topic: Open source CCS using AR7420
Replies: 416
Views: 237322

Re: Open source CCS using AR7420

Hyundai/Kia HV vehicles run at 450V when dealing with “low voltage” chargers (typically 500v max). If charge parameter discovery response EVSE max voltage is below 450v, you’ll very likely fail out. Newer model S and X are ~450v as well, so your likely faulting out for the same reason for both vehic...
by CCSknowitall
Tue Sep 05, 2023 6:26 am
Forum: Charging
Topic: Drawing power out of CCS port (V2x, inverse charging, bidirectional CCS)
Replies: 29
Views: 17763

Re: Drawing power out of CCS port (V2x, inverse charging, bidirectional CCS)

No real way to keep those switches closed. Could try 1 or 2 amps of current value in your currentdemandres EVSE actual current. Not actual current flow, just the reported value. There’s a chance the vehicle timer only fires due to your value staying at 0A for so long, and non zero might defeat it. W...
by CCSknowitall
Fri Aug 25, 2023 4:39 am
Forum: Charging
Topic: Open source CCS using AR7420
Replies: 416
Views: 237322

Re: Open source CCS using AR7420

I thought the QCA7420 couldn’t measure the sounding messages from the PEV? If that’s true, you are probably failing to send CM_ATTEN_CHAR.IND or sending nonsense values. You can certainly fake the measurements and send a value that the PEV side will accept.
by CCSknowitall
Fri Aug 25, 2023 4:24 am
Forum: Charging
Topic: Open source CCS using AR7420
Replies: 416
Views: 237322

Re: Open source CCS using AR7420

The iotecha tool is a professional device and costs professional device money. Low five figures. It is only a passive sniffer, but a mostly good one. A true bargain compared to the Keysight stuff (which can do a lot more, but also costs an order of magnitude more).
by CCSknowitall
Thu Aug 10, 2023 4:31 am
Forum: Charging
Topic: Open source CCS using AR7420
Replies: 416
Views: 237322

Re: PP differences for CCS1 vs CCS2

def resetTheConnection(self): # in case of a broken connection, here we try to start it again FYI if the tcp connection is broken (closed or reset) at any point during a session, the session will end. You can try to reconnect, but should start at the beginning. Stations that support also CHAdeMO ar...
by CCSknowitall
Mon Jul 31, 2023 1:52 am
Forum: Charging
Topic: Aliexpress QCA7005 modules
Replies: 15
Views: 19118

Re: Aliexpress QCA7005 modules

The firmware is stored in a separate SPI flash chip. Assuming whatever you did only damaged the QCA7000 and not the flash too, replacement of the chip is all that is necessary.
by CCSknowitall
Thu Jul 13, 2023 12:33 pm
Forum: Charging
Topic: Open source CCS using AR7420
Replies: 416
Views: 237322

Re: Open source CCS using AR7420

There are vehicles in the market today that 100% rely on the station’s EVSE preset voltage value and essentially do no estimate of the actual charger voltage during precharge. There’s also vehicles that do measure the inlet voltage and ignore whatever the EVSE says… And also there are some vehicles ...
by CCSknowitall
Mon Jul 03, 2023 4:27 pm
Forum: Charging
Topic: Open source CCS using AR7420
Replies: 416
Views: 237322

Re: Open source CCS using AR7420

You might be choking on the response code. ABB appears to send “ok” but they should send “OK_NewSessionEstablished”.

Work around it. :)
by CCSknowitall
Sat Jul 01, 2023 6:07 pm
Forum: Charging
Topic: Open source CCS using AR7420
Replies: 416
Views: 237322

Re: Open source CCS using AR7420

The difference between the good case with the Chademo-Test and the todays it, that the charger feels not well and seems to need more time. In the ChargeParameterDiscoveryRes, the good case is "ResponseCode": "OK", "EVSEProcessing": "Finished", "EVSEStatu...
by CCSknowitall
Sat Jul 01, 2023 6:01 pm
Forum: Charging
Topic: Open source CCS using AR7420
Replies: 416
Views: 237322

Re: Open source CCS using AR7420

Make sure you are in state C before you send your first cable check request.
by CCSknowitall
Mon Jun 12, 2023 4:30 am
Forum: Charging
Topic: Open source CCS using AR7420
Replies: 416
Views: 237322

Re: Open source CCS using AR7420

Curious to know if you guys think this python implementation would work on something even lower end than a raspberry pi zero? How much ram does it take up when running?
by CCSknowitall
Mon May 15, 2023 5:07 am
Forum: Charging
Topic: Open source CCS using AR7420
Replies: 416
Views: 237322

Re: Open source CCS using AR7420

In your Delta pcap, the second attempt looks like the station responded with failed negotiation… why, I have no idea, but your logs show accepted and moving onto the next step. You should exit out here instead of continuing. First attempt my only guess is part of the charger state machine got messed...
by CCSknowitall
Sat Mar 25, 2023 6:38 pm
Forum: Charging
Topic: Chademo Controller Development
Replies: 511
Views: 89600

Re: Chademo Controller Development

Not sure if obvious but in CHAdeMO spec, if the vehicle doesn’t ask for non-zero current within 6 seconds of charge start, the charger will stop (and at least some will show EVSE malfunction flag). Maxchargevoltage is a sort of “never exceed during charging” parameter and is usually set higher than ...
by CCSknowitall
Sat Mar 25, 2023 6:07 pm
Forum: Charging
Topic: Open source CCS using AR7420
Replies: 416
Views: 237322

Re: Open source CCS using AR7420

Most chargers will sit in contract authentication until you’ve authorized, yes. So you can do all your SLAC and setup verification without paying. Any charger on a network that advertises plug and charge capability by definition must set up communication before authentication as the vehicle itself i...
by CCSknowitall
Thu Mar 23, 2023 10:36 pm
Forum: Charging
Topic: Open source CCS using AR7420
Replies: 416
Views: 237322

Re: Open source CCS using AR7420

You could run tcpdump on the interface, you don’t necessarily need a sniffer on the line.

You’ll need to set EVReady to true or 1 for cable check, pre charge, power delivery, and current demand.
by CCSknowitall
Thu Mar 23, 2023 8:41 pm
Forum: Charging
Topic: Open source CCS using AR7420
Replies: 416
Views: 237322

Re: Open source CCS using AR7420

Ok I misspoke, you might be missing EVReady entirely? Most vehicles send true but apparently some send false here. It must be set to true in cable check and beyond until end of charging. Since it’s not in the charger logs, and everything else seems to be decoded, it’s suspicious. Really hard to work...
by CCSknowitall
Thu Mar 23, 2023 8:23 pm
Forum: Charging
Topic: Open source CCS using AR7420
Replies: 416
Views: 237322

Re: Open source CCS using AR7420

You’re missing EVReady: True in DC_EVStatus.
by CCSknowitall
Thu Mar 23, 2023 1:28 am
Forum: Charging
Topic: Open source CCS using AR7420
Replies: 416
Views: 237322

Re: Open source CCS using AR7420

EVCCID should be equivalent to MAC minus the normal colons between digits. If your EVCCID is blank, I could see that messing up some chargers. The charger is expecting something there. If you could get pcaps of sessions I could be more helpful. :) If you want to quickly check, throw 010000000002 in ...
by CCSknowitall
Wed Mar 22, 2023 4:35 am
Forum: Charging
Topic: Open source CCS using AR7420
Replies: 416
Views: 237322

Re: Open source CCS using AR7420

You guys are going from state C back to state B after power delivery request (the second one), prior to sending welding detection, right? If you are still in state C when sending welding, that could certainly throw a wrench into the charger’s state machine, although not technically a sequence error.
by CCSknowitall
Fri Mar 10, 2023 6:04 pm
Forum: Charging
Topic: Open source CCS using AR7420
Replies: 416
Views: 237322

Re: Open source CCS using AR7420

I tried looking at the alpitronics pcap where you get a failed response to a welding detection request. I am not sure what you’re doing wrong here. I have seen identical requests from real ccs vehicles. You might try setting EV ready to false and see if it doesn’t fail out. Seems like Alpitronics mi...
by CCSknowitall
Tue Jan 03, 2023 7:29 am
Forum: Charging
Topic: BMW i3 CCS/charge port controller
Replies: 1187
Views: 3379787

Re: BMW i3 CCS/charge port controller

A lot of stations will send back to the EV parameters no higher than what the vehicle reports. So in this case 125A being sent by the LIM is returned by the station as it’s upper limit.

This is done mostly for compatibility with early CCS EVs.
by CCSknowitall
Sun Dec 18, 2022 7:20 pm
Forum: Charging
Topic: BMW i3 CCS/charge port controller
Replies: 1187
Views: 3379787

Re: BMW i3 CCS/charge port controller

DIN 70121 was limited to 500V and at some point they moved to ISO 15118 which supports 1000V. There's vehicles out there that can do ~920V but still speak DIN. DIN 70121 may have been written when all cars were below 500V, but that doesn't mean vehicles don't use it. The upper bounds for a lot of v...