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Author Topic: Zero App vs. Zero Dash  (Read 758 times)

JaimeC

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Zero App vs. Zero Dash
« on: May 01, 2016, 12:30:15 AM »

Got a RAM mount so I can keep an eye on my phone while I rode.  When the Zero app is running, I noticed a couple of disparities:  The speed displayed on the app is different from the speed on the dash; I attribute that to the app collecting its data via the phone's GPS.  However, the app was also showing a consisted 2% higher rate of charge than on the dash.  Anyone know why that should be?  If the dash is displaying 50%, and the phone is displaying 52%, should I assume the actual value is 51%?  Just curious... that 2% isn't going to make any difference in when I hit "panic mode" or not...
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2013 BMW C650GT: Long trips in traffic
1999 BMW K1200LT: For everything else

Erasmo

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Re: Zero App vs. Zero Dash
« Reply #1 on: May 01, 2016, 02:10:35 AM »

The speed on the phone doesn't come from the GPS but from the motor/computer. I had a bike on a paddock stand to do some testing and even with the belt disconnected it would display a speed.
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JaimeC

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Re: Zero App vs. Zero Dash
« Reply #2 on: May 01, 2016, 04:37:46 AM »

Okay... then I have no explanation for why those numbers don't agree either, then.
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2016 Zero S: Short trips in traffic
2013 BMW C650GT: Long trips in traffic
1999 BMW K1200LT: For everything else

DPsSRnSD

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Re: Zero App vs. Zero Dash
« Reply #3 on: May 01, 2016, 11:47:18 AM »

I'd understand if the phone app showed readings with a delay with respect to the bike instrument panel. But I don't know how to explain the bike showing that I use about 60 Wh/mi trip and lifetime, while the phone app shows about 90 Wh/mi.
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ctrlburn

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Re: Zero App vs. Zero Dash
« Reply #4 on: May 01, 2016, 07:49:20 PM »

With speed - I know on the older "2013" dash we can set different ratios for gearing.

I doubt that value is communicated back to the bluetooth central brain because there is also a "drift" in Odometer which gets bigger (or smaller) as you "calibrate" the Speedometer hardware between the APP and the DASH.



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Electric Terry

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Re: Zero App vs. Zero Dash
« Reply #5 on: May 01, 2016, 09:01:18 PM »

The app will read 5% when the dash reads 0%.  The dash will never show 1% it just skips it.

So at low SOC it's really 4% off to protect you from getting yourself stuck somewhere.  Or to leave some in reserve

each 25% the dash gets one percent closer to actual

so at 50% on the dash its really 52% and by 100% its accurate

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Semper Why

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Re: Zero App vs. Zero Dash
« Reply #6 on: May 05, 2016, 11:19:41 PM »

The app will read 5% when the dash reads 0%.  The dash will never show 1% it just skips it.
Yeah, I found this out the exciting way.

Quote from: Electric Terry
So at low SOC it's really 4% off to protect you from getting yourself stuck somewhere.  Or to leave some in reserve
each 25% the dash gets one percent closer to actual
so at 50% on the dash its really 52% and by 100% its accurate
This is information that would have been really good to know about three weeks ago. Thanks for the info!
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Doug S

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Re: Zero App vs. Zero Dash
« Reply #7 on: May 05, 2016, 11:25:08 PM »

The dash will never show 1% it just skips it.

Completely meaningless thing I've noticed on my bike: it NEVER shows me 81%. Every morning on my ride to work I'm in the 82-86% range at the start of a long gradual downhill, so I'm using energy slowly for a couple of miles. The SoC indicator inches down very slowly...except when it gets to 82%. Instead of showing me 81% next, it jumps right to 80%. It happens every single time, so it's clear there's just no 81% on my bike. I wonder if every Zero does it or if my bike has had an 81-ectomy.
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Justin Andrews

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Re: Zero App vs. Zero Dash
« Reply #8 on: May 06, 2016, 09:11:35 PM »

Mine does the same, also it jumps from 62% to 60%
I'm guessing its rounding something somewhere else which causes this jump.
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