A wee something to look at...

[STP]

Just finished building a prototype. More work to do before it's fully finished but not too far off, some more Bluetooth scanning code to write. No-one has cracked the UDS codes for the CAYx until now.

I have.

This is live data from the engine ECU. A regen will start at 24g and end just under 6g. What a difference, knowing when a regen has started and stopped. Takes 15 mins and about 5 miles to regen. Anyone else want this level of info?

[PJD]

If that was in every diesel I suspect a lot would have fewer DPF issues and as a result more critical failures.

I would love to know what my van is doing rather than having to interpret a fast idle as a regen.

Would you share how you did this?

[STP]

I'm looking to sell this as a commercial product soon, at a reasonable price. It took months of reverse engineering and nearly a thousand lines of c++ code to produce this result, retailing in the range of £30 plus the OBD adaptor (if required, I will supply one at cost price) I think it's reasonable anyway. No more guessing on the DPF. All cars and vans should come with this display.

It also tells you when the "smart alternator" has kicked in, and dropped out. I'm loving it myself. I hope others will too.

This is genuine, no scam. I've worked long and hard at this. It works. The hardware for the display costs me a good bit already so the extra for the programming effort I think, is fair.

Let me know your thoughts. Like most of you, I am still noob status despite over 300 posts.

[Javito]

Well done mate, nice work!!

I use my phone to monitor regens but I would definitely pay 30 odd quid for your device. How customisable is it? Can it read other bits of info? Like distance since last regen or DPF differential pressure?

Are you planning on making it updatable/ releasing updates?

Do you use an ELM327?

[luk_asz]

This is great work
.I’d be happy to purchase this for my van.

[STP]

Thanks mate!

I have the uds codes for those so yes, it will display them too but on a small screen the space is limited when making it large enough to read easily. Currently I've developed it to talk to a vLinker FD as it is a very capable OBD adaptor and fully elm327 compliant but it would work with any adaptor with similar abilities. The display is 2.8" on this model but I can make a larger model and may go that way too. A larger one would be slightly more expensive to make.

This is where it's going next, deciding what to display and in which format. It can of course have text down to tiny font sizes but really it needs to be easy to read on the go so that no concentration is required to take in the info, preventing it being distracting. The idea is to have it constantly on display while driving and not requiring the use of a phone to know this information. It's also touchscreen so I can code in a screen swap when tapped so it gives me an option to show the other items like post-injection duration (which is how it heats up the dpf) and differential pressure / egr position for example.

I find I look at it a lot and have discovered that the van accumulates soot at around 0.12g per mile, or 19g per 160 miles which is probably down to the short length of journeys I do.

It's currently at 23.56g now as of parking up last night after work, so it will hit a regen in the first two or three miles max when I set off out today (after the coolant temp hits 90) and will burn down to just under around 5.5g and then stop again. Optimal burn seems to be cruising at 2000-2500 rpm in any gear, so it will happily complete a full regen in around 15 mins driving at 30 in 3rd gear around town if I don't stop and idle for more than 5 mins (otherwise it quits the regen until I move again)

[Javito]

Yeah, screen swap or the ability to choose what data to display would be great but to be honest there's only a few bits of information I tend to look at 99% of the time.

I'd like to see:

- Whether regens is off, warming up or on.
- either soot mass calculated or even better a %
- input and output temps
- Ash residue
- Distance since last regen


My van regens every 750km, always. It's never reached 24g of soot before that. I don't do many short trips though.

[STP]

Ok I can read all of that, and currently am displaying most of it. I'll do some code rejigging.

Out of interest, what year and engine do you have?

[Javito]

2014 CAYE, it's a 1.6

Let me if there's anything I can do to help. I use a Vgate iCar pro adapter.
I've also got a vcds clone and obdeleven.

[stu_b]

@STP
Would this work with other readers, like VCDS which is widely used ?

[STP]

2014 CAYE, it's a 1.6

Let me if there's anything I can do to help. I use a Vgate iCar pro adapter.
I've also got a vcds clone and obdeleven.

No worries, I have the CAYD so the uds codes are the same. They were a bitch to work out. Undocumented anywhere. Not the same as the 2.0. I use the vgate adaptors as they are really good, the vLinker is one of theirs and can do both CAN speeds on the fly so it works on Ford's too but is excellent on the Caddy ECU.

I wondered if your long mileage between regens could be since yours is pre vw emissions fix (unless you've had the software update), and mine was built just after. No matter anyway, still works on both.

[STP]

@STP
Would this work with other readers, like VCDS which is widely used ?

It will work with any elm327 compliant Bluetooth adaptor, I haven't implemented ble but standard Bluetooth only, since the vLinker uses that, though it is possible to do ble, I didn't have an adaptor which uses that.

VCDS uses usb to a cabled adaptor so no it won't work with those. VCDS lite does use Bluetooth so it would work with an adaptor which works with that version.

I still have to finish writing the code to scan for, and store, other Bluetooth adaptors but it won't take long to do that. I concentrate on one core functionality at a time. Just finished doing the miles since regen, post injection values (as this is a guarantee of a regen in process) and oil ash levels in the DPF. So will add a second screen which can be reached by tapping the touchscreen, switching between both screens (show one or the other) and an indicator on the main screen to show the regen has started or has stopped.

[stu_b]

All noted
I guess an obd11 reader is a fairly cheap option to install / use to enable the device to read the system etc
Question, I think I read in your earlier comment about the amount of spot generated
This will specific to each caddy it's plugged into (or are u taking a generic value) in terms of giving live data ?

As a thought (thinking from a business point of view for you), kinda like VCDS for example, is there anything to stop a person moving it from one vehicle to another to get a readout on an additional vehicle ... Or will it be licensed to one vehicle only - maybe an opportunity for additional users or just one user ie based on vehicle vin

Is this sort of thing already available in the market for other vehicles with DPF's ??

I'm intrigued to know more

Cheers
Stu

[PJD]

Really clever but of kit and £30 makes it an easy decision.

[kobat79]

That's really impressive. Nice work. My Caddy doesn't have a DPF but my Mk7 Golf does. Would this work on that? I'd be interested in one if it does.