xenoDisplay – Progress Report
Apr 7th, 2010 | By Eric | Category: EV Project NewsThis is going to be a bit disappointing. Recently, I attempted to take some video of the xenoDisplay in action, but it came out very poorly. The only digital video capture device I have is my Casio Exilim digital camera, and while it has a relatively high resolution for video (640×480), it had a terrible time trying to focus on my iPhone screen, so the video was completely illegible and blurred out.
Instead of video, here are some new screenshots.
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- the splash & loading screen. Usually takes just a few seconds to load on a 3GS. More on a 3G.
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- connection with lithiumate not established (note red wifi symbols)
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- the main screen – with the xenoDisplay showing a good connection
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- Individual cell display “simple” mode
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- cell data details
Unfortunately, these screenshots can’t show the slick zooming in/out when the user taps on the battery pack or on the speedometer/ammeter/temp gauges. The user can use finger swipes to scroll the individual battery cell displays to show all the cells. I still need to work on this code (it’s a bit jerky) but that’s not a big deal.
Note: all gauges are active at all times, so even though the speedometer gauge gets shrunk down when the user is viewing individual cell data, it still shows the current speed.
I had hoped to show the charge status indicator, but unfortunately, my charger (the Delta-Q) isn’t properly programmed yet, so it refused to charge the battery pack. Still, it’s coming along nicely, and I think we’ll be starting in on Curtis support within the month.
That’s all for now.
Eric
I hope you are using impedance to track the batteries state of charge. Voltage alone is nearly worthless, coulomb counting is better but needs to be adjusted to compensate for things like temperature, cell aging and Peukert’s effect.
Hi Jeff,
The voltage is just there for informational purposes. The SOC and DOD are computed in the Lithiumate which uses a much more sophisticated algorithm. We don’t do any computations on the xenoDisplay itself – we just display what the BMS provides.
Eric
looks good.
I hope you’ll see the end shortly
A suggestion
you should modify the amp gauge to show when the motor goes in regen mode
Hi Santini,
It’s in the works. =) The current graphic is temporary. The range will go from negative (regen) to positive (normal draw) so the user will know when they are utilizing regen.
Eric
This looks great. I do hope you’ll make it available for IPAD as well.
My question regards the equipment end. Will I be able to develop a device to connect to this app from a different controller/etc. I don’t actually care about individual cell voltages and won’t be using Elithion.
But if the data format were published and the Wifi device required, it sounds likeit coulld be interfaced to other devices. Curtis 1238 controller for example. Xantrex LinkPro or Linklite, etc.
Jack Rickard
Hi Jack,
Take a look at the product page for the xenoDisplay:
http://www.xenopi.com/?page_id=229
It answers most of your questions. The xenoDisplay does not have a fixed communications data format. Instead, it speaks to each device in the device’s own data protocol. Most devices aren’t really programmable, so the xenoDisplay has to adapt to them instead of them adapting to the xenoDisplay. This means we write dedicated communication modules for the code for each device.
Cheers,
Eric
great, i’m keeping an eye on your evolution.
). It will be be larger than yours. It’ll get two places in tandem and tilt in turns
I’m also building an electric three wheeler (with an ac-31 too