Replies: 11 comments 46 replies
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If you import the flow, be sure to have the homeassistant library installed otherwise you get errors cause ha-device-config, ha-entity-config couldn't be found and all your nodes stop working until the error is fixed and you installed the librarys in nodered or you delete all as "unknown" marked entries in nodered.. |
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Question - I know that the PID code for the Seal's SOC is 221FFC... but I can't see how that is captured in this data anywhere... what is the algorithm? Basically I want to reverse engineer the PID for 'charge time'... SOC Cheers, |
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I was looking int the Same thing for the Dolphin.... so far i dont know how to get from the PID Adress to the TX Message |
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Ah, but you DO have some PID addresses? I’ve got the following…
221FFC - SOC
220009 - Charging current
220008 - Battery voltage
220032 - Battery temperature
Best regards,
Andy
…________________________________
From: T1983M ***@***.***>
Sent: Monday, January 20, 2025 10:54:19 PM
To: meatpiHQ/wican-fw ***@***.***>
Cc: Andy Stewart ***@***.***>; Comment ***@***.***>
Subject: Re: [meatpiHQ/wican-fw] BYD Seal - what I have for now .... (Discussion #122)
I was looking int the Same thing for the Dolphin.... so far i dont know how to get from the PID Adress to the TX Message
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of course they are not the same. So far i have identified following: I looked into some of the other parameters and i can see all the BYD Models so far seem to have different PIDs for the same things. I would like to use the the NODE Red code above and i am aware that the PIDs need to be adapted, but as you i am struggling to understand the structure. Where do i need to modify the TX command so that it works for my PID? |
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I think this would be a good idea. |
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Hi all. I've just got my WiCAN yesterday and tried to set it up with my BYD Seal. I noticed using the AutoPID mode and selecting the BYD atto (just as a test) caused the car alarm to sound after a few seconds of locking the car. Searching here I came across this topic 290 for the Seal U DMI and the same alarm problem, which looks like it may apply to all BYDs as it's been experienced on the Dolphin/Seal U and Seal thus far. Is there a simple explanation of what Custom PIDs/settings I need to add to my WiCAN for my BYD Seal to work? Thanks in advance. |
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This is a security feature in the Seal. Maybe there's an option to disable it? There's something else we can try, change the protocol to elm327 to stop the autopid, reboot and then while the car is off and locked use the Monitor tab and check if there's any data on the bus. And also try while it's on the charger. |
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OK, so i did that... I thought i'd run the monitor before locking the car too, but car was off at the time...i got the below... Then i stopped monitoring, rebooted wican, locked the car and started monitoring again - nothing... Then i stopped monitoring, unlocked the car, plugged in the charger, rebooted wican, and started monitoring again - nothing... on the plus side, the alarm didn't go off lol Does any of that help? |
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The monitor won't trigger the alarm since it's monitoring the bus and not sending any PID requests. Is it possible to leave the car unlocked would this trigger the alarm? Or maybe look for a way to disable the alarm on OBD activity. |
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Unlocked? What forever? I assumed people leave the wican connected at all times so when you arrive home it connects and sends data to Ha etc.? No idea about where to start with the alarm aspects but I’d rather not disable it if that meant whenever wican is connected the alarm is off. What’s the returns policy for these devices? I bought through Mouser - would they take it back do you think? thanks for the efforts thus far |
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No not unlocked forever. While charging in your garage if that's possible. And yes with other cars they leave WiCAN connected all the time, not every car has this annoying feature of triggering the alarm if OBD communication is detected.
I did not mean to disable the alarm completely, maybe there's a way to disable it just like the "Child Presence Detection" alarm disable.
Reach out to Mouser about their return policy. |
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looks like the problem solved it self - got a view days ago the update 1.4 on my seal - no alarm any more :D |
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Thank you for reporting back! @dasmith83 might be interested to hear this :) |
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Is this using the autopid option for the seal still? What sensors/data is it now pulling? Just SoC? I've not yet had the 1.4 update land on mine, even though I check everyday lol - when it finally updates i'll give it another go - thanks for the update :) |
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i dont use the autopid function - see my node red flow from start of this thread ... This are the values i get from my seal: |
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can confirm it's working with my 2024 seal and the 1.4 update |
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I'm pleased to (finally) report, that indeed, the seal works fine once updated to 1.4 software. Took me a while for the dealers to get me sorted, and then even longer for me to remember to dig out the wican. All connected and SOC now in HA :) lovely stuff |
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Hi All as a newbie who is floundering, was there a solution to the BYD Seal alarm going off when it was locked with the WICAN attached? I've read all the relevant posts ( I think) and it seems to be a security feature. Some one reported that the "problem" went away with FW version 1.4, but im not sure f that was on the car or the wican... |
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Hey. 1.4 was referring to the car. If your alarm is going off, you're car is not on the latest version. I'm assuming you've not had the car long? It can take "some time" before BYD update lands for you to install. If you go to the cars update section, what version does it say you're on? when pressing the update button it will probably say v1.0 if you've only recently received the car. Us in the UK on the latest it says v2.0. I'm using the latest BYD software and the WiCAN is using autopid for the seal and it gives me soc and battery temp and a few other bits with no alarm now. |
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Thanks for the quick response
Specifically version details on screen says: |
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I just took some proper numbers for you... The number you show above (the system version), i see "13.1.33.2506260.1" The 1.0.0, or 2.0.0 etc. is a screen that is displayed (eventually) after pressing "upgrade" many many times (it's slow to talk to their servers and display the message). It will say "Tips: Your car is the latest version v2.0.0" or whatever you have installed. IF you only see 1.0.0, it is either you car is too far behind the over the air updates (more than 2 versions behind current and will need a dealer visit to update manually...i had to do this), or simply that you've not had the car long and it can take a few weeks for the OTA update to land on your car. When it does land, it will pop up and tell you to update. Then WiCAN will work :) |
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Thanks for the info. i'll check that this evening when the wife get home. im pretty sure it said the the same version number, 13.x.x.x, but I'll make sure. |
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Step 1 - Poll the car to see if its locked. Doubt thats going to work. Theres quite a few cars that set the alarm off for any activity on the can bus when its locked. This is because there were heeps of cars being stolen by people getting access to wires by taking off trim around the wheel or something to get to the canbus to unlock the car and start it etc. Sounds like BYD have removed this from 1.4 though, so hopefully if you sort out your upgrade it will let WiCAN work for you. |
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Ok, after a bit of time spamming the update button i did the obvious and looked up the version number system. 13.1.33.2506260.1 is version 1.33 released 26 june 2025 :-) Rather obvious in hindsight. i feel that hoping that BYD will disable a security feature (as they appear to have done in v 1.4) and then not reenable it in subsequent versions, seems to be a problem just waiting to happen. regards |
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@dasmith83 have you checked if there's any options to enable it? |
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hey MeatPi - no not yet...tbh wouldn't know where to look and a few FB posts suggest it's been closed down intentionally and no one has found a way round yet. Early days though. |
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Yeah I just saw a Reddit post about it. Seems like they figured that proper security is expensive so they killed the port altogether |
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ah ok :( I'll give the smartcar thing a go, it's shame as i'd just setup automations to update the Octopus IOG % charge to add based on the battery SoC at time of plugging in too lol - only had that for a few weeks. Never mind, maybe it will come back in future |
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I can confirm that after the 2.1.0 update, sending via TX is no longer working. The RX channel still works, but I’m not sure when the car sends data without a request (it still happens on rare occasions). |
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According to a discord server I am in for byd Android development, The ODB port is now encrypted in the latest firmware update.
regards
Peter Hopkinson
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HCtech Pty Ltd T/a Hopkinson Consulting
1/8 Midas Rd
Malaga 6090 Perth
Western Australia
Mob: 0411 224 534
Tel: 08 9463 6644
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Sent: Tuesday, December 16, 2025 10:57:47 PM
To: meatpiHQ/wican-fw ***@***.***>
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Subject: Re: [meatpiHQ/wican-fw] BYD Seal - what I have for now .... (Discussion #122)
I can confirm that after the 2.1.0 update, sending via TX is no longer working. The RX channel still works, but I’m not sure when the car sends data without a request (it still happens on rare occasions).
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Hy all,
the last days i was analyzing my BYD Seal - here is the actual status:
lowest voltage cell (3,32V):
TX: {"bus":"0","type":"tx","ts":12342,"frame":[{"id":2023,"dlc":8,"rtr":false,"extd":false,"data":[3,34,0,43,170,170,170,170]}]}
RX: {"bus":"0","type":"rx","ts":12348,"frame":[{"id":2031,"dlc":8,"rtr":false,"extd":false,"data":[5,98,0,43,252,12,170,170]}]}
highest voltage cell (3,33V):
TX: {"bus":"0","type":"tx","ts":31858,"frame":[{"id":2023,"dlc":8,"rtr":false,"extd":false,"data":[3,34,0,45,170,170,170,170]}]}
RX: {"bus":"0","type":"rx","ts":31864,"frame":[{"id":2031,"dlc":8,"rtr":false,"extd":false,"data":[5,98,0,45,0,13,170,170]}]}
lowest voltage cell number (44):
TX: {"bus":"0","type":"tx","ts":15021,"frame":[{"id":2023,"dlc":8,"rtr":false,"extd":false,"data":[3,34,0,42,170,170,170,170]}]}
RX: {"bus":"0","type":"rx","ts":57225,"frame":[{"id":2031,"dlc":8,"rtr":false,"extd":false,"data":[4,98,0,42,43,170,170,170]}]}
highest voltage cell number (88):
TX: {"bus":"0","type":"tx","ts":15021,"frame":[{"id":2023,"dlc":8,"rtr":false,"extd":false,"data":[3,34,0,44,170,170,170,170]}]}
RX: {"bus":"0","type":"rx","ts":7962,"frame":[{"id":2031,"dlc":8,"rtr":false,"extd":false,"data":[4,98,0,44,87,170,170,170]}]}
lowest temperatur cell number (5)
TX: {"bus":"0","type":"tx","ts":28163,"frame":[{"id":2023,"dlc":8,"rtr":false,"extd":false,"data":[3,34,0,46,170,170,170,170]}]}
RX: {"bus":"0","type":"rx","ts":7149,"frame":[{"id":2031,"dlc":8,"rtr":false,"extd":false,"data":[4,98,0,46,4,170,170,170]}]}
lowest temperatur cell (22 °C)
TX: {"bus":"0","type":"tx","ts":35633,"frame":[{"id":2023,"dlc":8,"rtr":false,"extd":false,"data":[3,34,0,47,170,170,170,170]}]}
RX: {"bus":"0","type":"rx","ts":54490,"frame":[{"id":2031,"dlc":8,"rtr":false,"extd":false,"data":[4,98,0,47,62,170,170,170]}]}
highest temperatur cell number (5)
TX: {"bus":"0","type":"tx","ts":10232,"frame":[{"id":2023,"dlc":8,"rtr":false,"extd":false,"data":[3,34,0,48,170,170,170,170]}]}
RX: {"bus":"0","type":"rx","ts":14861,"frame":[{"id":2031,"dlc":8,"rtr":false,"extd":false,"data":[4,98,0,48,1,170,170,170]}]}
highest temperatur cell (23 °C)
TX: {"bus":"0","type":"tx","ts":45461,"frame":[{"id":2023,"dlc":8,"rtr":false,"extd":false,"data":[3,34,0,49,170,170,170,170]}]}
RX: {"bus":"0","type":"rx","ts":18397,"frame":[{"id":2031,"dlc":8,"rtr":false,"extd":false,"data":[4,98,0,49,63,170,170,170]}]}
Front Drive Motor temperatur (30 °C)
TX: {"bus":"0","type":"tx","ts":42239,"frame":[{"id":2019,"dlc":8,"rtr":false,"extd":false,"data":[3,34,0,15,170,170,170,170]}]}
RX: {"bus":"0","type":"rx","ts":7939,"frame":[{"id":2027,"dlc":8,"rtr":false,"extd":false,"data":[4,98,0,15,70,170,170,170]}]}
Battery total Voltage (572 V)
TX: {"bus":"0","type":"tx","ts":13789,"frame":[{"id":2023,"dlc":8,"rtr":false,"extd":false,"data":[3,34,0,8,170,170,170,170]}]}
RX: {"bus":"0","type":"rx","ts":7048,"frame":[{"id":2031,"dlc":8,"rtr":false,"extd":false,"data":[5,98,0,8,60,2,170,170]}]}
Battery Aavarage temperatur (22 °C)
TX: {"bus":"0","type":"tx","ts":17603,"frame":[{"id":2023,"dlc":8,"rtr":false,"extd":false,"data":[3,34,0,50,170,170,170,170]}]}
RX: {"bus":"0","type":"rx","ts":8303,"frame":[{"id":2031,"dlc":8,"rtr":false,"extd":false,"data":[4,98,0,50,62,170,170,170]}]}
Charge times (42)
TX: {"bus":"0","type":"tx","ts":8337,"frame":[{"id":2023,"dlc":8,"rtr":false,"extd":false,"data":[3,34,0,11,170,170,170,170]}]}
RX: {"bus":"0","type":"rx","ts":50613,"frame":[{"id":2031,"dlc":8,"rtr":false,"extd":false,"data":[5,98,0,11,42,0,170,170]}]}
SOC
TX: {"bus":"0","type":"tx","ts":19302,"frame":[{"id":2023,"dlc":8,"rtr":false,"extd":false,"data":[3,34,31,252,170,170,170,170]}]}
RX: {"bus":"0","type":"rx","ts":19313,"frame":[{"id":2031,"dlc":8,"rtr":false,"extd":false,"data":[7,98,31,252,32,33,96,59]}]}
I did a Node Red flow for my automations and for translating/calculate the CAN data.
Here is the flow in json for importing:
[{"id":"cfa234aa85220d6c","type":"tab","label":"BYD Seal to HA / OpenWB","disabled":false,"info":"","env":[]},{"id":"306a9c3def3cec36","type":"mqtt out","z":"cfa234aa85220d6c","name":"Send to BYD Requests","topic":"","qos":"","retain":"","respTopic":"","contentType":"","userProps":"","correl":"","expiry":"","broker":"f86413f49509202e","x":590,"y":300,"wires":[]},{"id":"154c81fae497ce59","type":"inject","z":"cfa234aa85220d6c","name":"SOC","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"15","crontab":"","once":false,"onceDelay":0.1,"topic":"wican/5432048f34c1/can/tx","payload":"{\"bus\":\"0\",\"type\":\"tx\",\"frame\":[{\"id\":2023,\"dlc\":8,\"rtr\":false,\"extd\":false,\"data\":[3,34,31,252,170,170,170,170]}]}","payloadType":"json","x":110,"y":80,"wires":[["306a9c3def3cec36"]]},{"id":"33484382472e7fa5","type":"mqtt in","z":"cfa234aa85220d6c","name":"","topic":"wican/5432048f34c1/can/rx","qos":"2","datatype":"auto-detect","broker":"f86413f49509202e","nl":false,"rap":true,"rh":0,"inputs":0,"x":590,"y":200,"wires":[["e28a91d67be36074","a7a631fc6b77be41"]]},{"id":"e28a91d67be36074","type":"switch","z":"cfa234aa85220d6c","name":"","property":"payload.frame[0].data[2]","propertyType":"msg","rules":[{"t":"eq","v":"31","vt":"str"}],"checkall":"true","repair":false,"outputs":1,"x":790,"y":140,"wires":[["837d2fdb07d2da02"]]},{"id":"837d2fdb07d2da02","type":"function","z":"cfa234aa85220d6c","name":"Calculate SOC","func":"var BIT4 = msg.payload.frame[0].data[4];\nvar BIT5 = msg.payload.frame[0].data[5];\nvar SOC = ((BIT5*256)+BIT4)/100;\nmsg.payload = SOC;\nreturn msg;","outputs":1,"timeout":0,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1000,"y":120,"wires":[["86dcc06708499e30","e2fe78f742205ba6"]]},{"id":"86dcc06708499e30","type":"ha-sensor","z":"cfa234aa85220d6c","name":"BYD Seal SOC","entityConfig":"2436368cf391f4e9","version":0,"state":"payload","stateType":"msg","attributes":[],"inputOverride":"allow","outputProperties":[],"x":1300,"y":120,"wires":[[]]},{"id":"e2fe78f742205ba6","type":"mqtt out","z":"cfa234aa85220d6c","name":"","topic":"openWB/set/vehicle/1/get/soc","qos":"","retain":"","respTopic":"","contentType":"","userProps":"","correl":"","expiry":"","broker":"c10d09170577090c","x":1350,"y":60,"wires":[]},{"id":"a7a631fc6b77be41","type":"switch","z":"cfa234aa85220d6c","name":"","property":"payload.frame[0].data[3]","propertyType":"msg","rules":[{"t":"eq","v":"43","vt":"str"},{"t":"eq","v":"45","vt":"str"},{"t":"eq","v":"42","vt":"str"},{"t":"eq","v":"44","vt":"str"},{"t":"eq","v":"8","vt":"str"},{"t":"eq","v":"11","vt":"str"},{"t":"eq","v":"46","vt":"str"},{"t":"eq","v":"48","vt":"str"},{"t":"eq","v":"47","vt":"str"},{"t":"eq","v":"49","vt":"str"},{"t":"eq","v":"50","vt":"str"}],"checkall":"true","repair":false,"outputs":11,"x":790,"y":280,"wires":[["a6dbf4ad667627c5"],["c049ab397822dbdd"],["a4204e195195a59d"],["e0fa2f99e46881a4"],["cc03f7bced646c2e"],["b593c385169043a9"],["e7b481444cf8aae0"],["ec1bcb66284b6bae"],["274fb6d17dfc733a"],["53231bff1b3fcddf"],["dae9e6c5d30173de"]]},{"id":"a6dbf4ad667627c5","type":"function","z":"cfa234aa85220d6c","name":"Calculate Lowest Cell Voltage","func":"var BIT4 = msg.payload.frame[0].data[4];\nvar BIT5 = msg.payload.frame[0].data[5];\nvar LCV = ((BIT5*256)+BIT4)/1000;\nmsg.payload = LCV;\nreturn msg;","outputs":1,"timeout":0,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1050,"y":160,"wires":[["12f934c761695786"]]},{"id":"12f934c761695786","type":"ha-sensor","z":"cfa234aa85220d6c","name":"Lowest Cell Voltage","entityConfig":"a291176d5bb2a2c8","version":0,"state":"payload","stateType":"msg","attributes":[],"inputOverride":"allow","outputProperties":[],"x":1310,"y":160,"wires":[[]]},{"id":"a57e3e60577b02f6","type":"inject","z":"cfa234aa85220d6c","name":"Lowest Cell Voltage","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"60","crontab":"","once":false,"onceDelay":0.1,"topic":"wican/5432048f34c1/can/tx","payload":"{\"bus\":\"0\",\"type\":\"tx\",\"frame\":[{\"id\":2023,\"dlc\":8,\"rtr\":false,\"extd\":false,\"data\":[3,34,0,43,170,170,170,170]}]}","payloadType":"json","x":160,"y":120,"wires":[["306a9c3def3cec36"]]},{"id":"c049ab397822dbdd","type":"function","z":"cfa234aa85220d6c","name":"Calculate Highest Cell Voltage","func":"var BIT4 = msg.payload.frame[0].data[4];\nvar BIT5 = msg.payload.frame[0].data[5];\nvar HCV = ((BIT5*256)+BIT4)/1000;\nmsg.payload = HCV;\nreturn msg;","outputs":1,"timeout":0,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1050,"y":200,"wires":[["7d21cf15ee8cc6ee"]]},{"id":"7d21cf15ee8cc6ee","type":"ha-sensor","z":"cfa234aa85220d6c","name":"Highest Cell Voltage","entityConfig":"ba968f194a4ed4b3","version":0,"state":"payload","stateType":"msg","attributes":[],"inputOverride":"allow","outputProperties":[],"x":1320,"y":200,"wires":[[]]},{"id":"d7df82c7468b70c1","type":"inject","z":"cfa234aa85220d6c","name":"Highest Cell Voltage","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"60","crontab":"","once":false,"onceDelay":0.1,"topic":"wican/5432048f34c1/can/tx","payload":"{\"bus\":\"0\",\"type\":\"tx\",\"frame\":[{\"id\":2023,\"dlc\":8,\"rtr\":false,\"extd\":false,\"data\":[3,34,0,45,170,170,170,170]}]}","payloadType":"json","x":160,"y":160,"wires":[["306a9c3def3cec36"]]},{"id":"e0fa2f99e46881a4","type":"function","z":"cfa234aa85220d6c","name":"Calculate Highest Cell Number","func":"var BIT4 = msg.payload.frame[0].data[4];\nvar BIT5 = msg.payload.frame[0].data[5];\nvar COUNT = 1\nvar HCN = (BIT4+COUNT);\nmsg.payload = HCN;\nreturn 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