Chariot Gauge - Wideband O2, Boost/Vac, Oil pressure, Temp and Voltmeter

[codrum]

The data logging/charting update is complete on Android, here's a couple of screenshots (phone on the left, tablet on the right):



You can switch between the gauge view and the chart view at any time from any of the gauges. The chart follows the data as it's available so you get a real-time view. The upper right hand buttons will pause the real-time updates so you can go back and review the historical data.

This will work with any controller that has already been ordered and of course any future orders. The data points are displayed as it's made available by the controller. You can tap on the data points to see what the underlying value is - a small popup message will show for just a moment and the text value at the top will be updated. You can pinch to zoom/expand and all charts support portrait and landscape views.

The next update will allow for recording the data logs and save them to the device. Right now they are "session only" meaning as soon as you navigate away from the chart the data is lost.
Should be available on Google Play in a couple of hours - onto iOS.

[codrum]

Whats the possibility that we could get this to connect to a bluetooth head unit with a pop out screen?

Right now pretty low unless they make head units that are Android powered and can run apps. I'm always keeping my eyes open for new opportunities but the market of people with smartphones is much larger than those with Bluetooth equipped head units. Would be cool though!

[JohnyEndo]

Whats the possibility that we could get this to connect to a bluetooth head unit with a pop out screen?

[codrum]

I've been working on datalogging/charting recently and I think it's coming together pretty well. So far I have a single time series set up, the finished product will allow multiple series on one chart to pit the sensors against each other. The charting library I'm using handles very quick updates so I think it should be ok rendering in real-time as the data becomes available (IE 20 times a second).

Here's a screenshot (random numbers being generated):


Lots more work to do but I'm really excited for this update!

[codrum]

Pushed an update for Android devices yesterday. There were two data-parsing fixes that a couple of users were reporting - those errors should be handled now. There was also a localization issue using comma delimiters when passing the data from the controller to the app on a metric-based device - this is fixed.

I had noticed a couple of errors from Samsung Galaxy s3 phones when a user disconnects from Bluetooth. I'm able to reproduce the error on my own s3 but the error stack is extremely vague. So I did a little bit of searching around and found the s3s are notorious for throwing the error and so far it's been assumed the Bluetooth firmware is a little screwy and hasn't been addressed by Samsung. It shouldn't affect any other portion of the app but if you get a force close when disconnecting from Bluetooth with an S3 there's not a lot I can do. I'll keep an eye out for updates.

A full breakdown of the updates can be found on the May 6 commits here: https://github.com/mikemey01/Chariot...thor=mikemey01

[codrum]

That makes sense. I think it's a super good idea I mean your getting 4 gauges in 1 for $50! That is insane! Your the man! How easy is installation? I have an e36 m3 drift car I'm building and I just picked up an iPad (3rd gen) and did some research and found this. I downloaded chariot app and I think it is the coolest thing ever just want to make sure my obd1 boosted m50 is compatible. Also how long (if any) is the delay time for all sensor readings?

Sounds like you have everything you need! The installation is fairly painless. There are two wires (signal and ground) that connect to your wideband controller, oil pressure sender, temperature sensor (oil, air, or water), and voltmeter - Plus the 12v switched and ground wires to power the controller.

For boost/vacuum you need to T off a vacuum source and connect the vac hose to the onboard map sensors and you're done!

Of course if you wanted you can connect only one of the five sensors or you can connect all five, it's up to you! For a more visual guide see http://www.chariotgauge.com/install-guide-assembled/

[bimmerboy709]

That makes sense. I think it's a super good idea I mean your getting 4 gauges in 1 for $50! That is insane! Your the man! How easy is installation? I have an e36 m3 drift car I'm building and I just picked up an iPad (3rd gen) and did some research and found this. I downloaded chariot app and I think it is the coolest thing ever just want to make sure my obd1 boosted m50 is compatible. Also how long (if any) is the delay time for all sensor readings?

[codrum]

Why no rpm's.. :(

Oh man I hear ya! Ideally the controller would capture and display engine speed which would be really awesome with the upcoming data logging. But with the various means to capture the rpm signal it was too complicated and would make the controllers prohibitively expensive. Stand-alone ECUs such as megasquirt do a great job of it and is not really something I could improve on at a lower price so I don't want to try and compete with them.

It's a big to-do item on my list but it'll be much further down the road than the current planned updates to the app oriented around the data it's already capturing.

[bimmerboy709]

Why no rpm's.. :(

[codrum]

Great product have it in my car and use it daily on my small tablet. Keeps the interior stock looking and all the functions are awesome! I was always worried about my car getting broken into from having visible gauges or cops pulling me over because i have gauge on my dash this is a great solution for both. A+++ product great support! Don't hesitate to buy.

Thanks for the feedback! It's comments like this that keeps me going.

[blk90e30]

Great product have it in my car and use it daily on my small tablet. Keeps the interior stock looking and all the functions are awesome! I was always worried about my car getting broken into from having visible gauges or cops pulling me over because i have gauge on my dash this is a great solution for both. A+++ product great support! Don't hesitate to buy.

[codrum]

Bump.

[codrum]

All orders sent out for the week, thanks guys!

[codrum]

I've been working with a company to produce a small tin enclosure for the controller. These will be included with all future orders ready for install to keep the controller safe. I've heard a lot of feedback requesting something to store the controller in and I think this is a good solution.



If you have already ordered a controller and would like one of these enclosures pm/email me your address and I'll get one out to you! They arrive middle of next week so I should be able to get them out by next weekend.

[codrum]

Very nice work. I do have a few questions:

Do you have a projected timeline for when datalogging will be available?

What is the targeted data collection rate?

What is the refresh rate of the displayed Wideband gauge?

Is there an easy way to get the MAP sensor output to send it to Microsquirt?

I'm considering this as an option for a KE-Jet CIS to EFI conversion on my Merc 2.3-16 Cossie where I'd like to do MAP and AFR data logging pre-conversion and then have the same set up be available after the conversion.

Thanks.

1. I'm shooting for sometime in the third quarter this year. There's some really cool graph-display libraries that I'm playing around with, just need to find the right fit for this app. What's cool though is any new development will always be distributed freely to current Chariot Gauge system owners and be available open source on gitHub if you'd like to see under the hood!

2. 20 queries a second is what is currently being handled. For display purposes I may need to average it as four amounts (average of five readings) each second but I won't know for sure what resolution I'll finally end up with.

3. Same as above, 20/second. This goes for all five gauges.

4. There is currently no way to output the MAP sensor data outside of the Chariot Gauge system. The MAP sensor is on-board and the sensor itself handles the conversion to an analog signal. It would probably be easiest to buy a MPX4250AP ($14 from mouser.com) and connect the signal/ground directly to microsquirt - however I don't know what the input for microsquirt looks like or if it's configurable. I'll do some reading on it.

Hopefully that answers your questions, let me know what else, thanks!