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@jakem avatar
UTC

Addicted
Vespa Sprint Sport S 125cc
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Posts: 661
Location: Brighton, England
 
Addicted
@jakem avatar
Vespa Sprint Sport S 125cc
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Location: Brighton, England
UTC quote
Found it curious that the total miles displayed on the Vespa app doesn't match the total miles travelled by my Vespa odometer.

Turned on the Vespa and reconnected a second time, and still showing 2 miles different…
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Forum member supplied image with no explanatory text
@shebalba avatar
UTC

Molto Verboso
2009 GTS250, Ducati Monster M900, KTM 390 Adventure, Honda CR125
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Posts: 1550
Location: Oceanside, CA
 
Molto Verboso
@shebalba avatar
2009 GTS250, Ducati Monster M900, KTM 390 Adventure, Honda CR125
Joined: UTC
Posts: 1550
Location: Oceanside, CA
UTC quote
I want my 2 miles...
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UTC

Veni, Vidi, Posti
Joined: UTC
Posts: 7058
Location: Tega Cay, SC
 
Veni, Vidi, Posti
Joined: UTC
Posts: 7058
Location: Tega Cay, SC
UTC quote
I don't really know where your 2 miles are, but I was going to suggest you lighten up the key ring that has the Vespa key on it. This is known to cause havoc with the ignition switch after a while.
@jimc avatar
UTC

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The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
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@jimc avatar
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
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Posts: 43894
Location: Pleasant Hill, CA
UTC quote
Tierney wrote:
I don't really know where your 2 miles are, but I was going to suggest you lighten up the key ring that has the Vespa key on it. This is known to cause havoc with the ignition switch after a while.
Not only that, but the hole in the Vespa key isn't that strong - you could lose all the other keys just going over a harsh bump.
@steelbytes avatar
UTC

Veni, Vidi, Posti
2019 GTS300 Supertech E3 60,000km
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Location: Batmania aka Melbourne, Australia
 
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@steelbytes avatar
2019 GTS300 Supertech E3 60,000km
Joined: UTC
Posts: 5710
Location: Batmania aka Melbourne, Australia
UTC quote
ok, I dug into this for you. App bug unsurprisingly.

the app is receiving the odo value from the bike as miles*, ie 5998. It converts this to kms using 1.61 which is 9656.78km and then stores it. At display time it converts it to miles using 0.621371 giving 6000 miles.

PS, even worse for some bikes it uses 1.60934 in the first step which correctly becomes 5998 when displayed.

* this is poor design of the tft module + pmp protocol that if well designed would always send an accurate value in a consistent unit and kms are more accurate then miles. Hmm, looked further and on some models it is always kms and on some it sends based on the dash display mode.

Facepalm emoticon Facepalm emoticon Facepalm emoticon Facepalm emoticon Facepalm emoticon
⚠️ Last edited by SteelBytes on UTC; edited 3 times
@znomit avatar
UTC

Veni, Vidi, Posti
LX190 Friday afternoon special, [s]Primavera[/s], S50, too many pushbikes
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Posts: 10347
Location: Hermit Kingdom
 
Veni, Vidi, Posti
@znomit avatar
LX190 Friday afternoon special, [s]Primavera[/s], S50, too many pushbikes
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Posts: 10347
Location: Hermit Kingdom
UTC quote
That's the distance between your phone and the scooters brain multiplied by every ride.
@coddy avatar
UTC

Addicted
2021 GTS 300 Supersport, Triumph Tiger 800
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Posts: 546
Location: Oxfordshire, UK
 
Addicted
@coddy avatar
2021 GTS 300 Supersport, Triumph Tiger 800
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Posts: 546
Location: Oxfordshire, UK
UTC quote
More importantly, that is some seriously impressive MPG figures.
@nomad68 avatar
UTC

Molto Verboso
Back on a 125cc!
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Posts: 1149
Location: High Wycombe UK
 
Molto Verboso
@nomad68 avatar
Back on a 125cc!
Joined: UTC
Posts: 1149
Location: High Wycombe UK
UTC quote
Coddy wrote:
More importantly, that is some seriously impressive MPG figures.
This ^^^

SERIOUSLY impressive
@fledermaus avatar
UTC

Veni, Vidi, Posti
2007 LX150 2015 GTS (on the bench) 2017 BV 350
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Location: Fond du Lac, Wisconsin
 
Veni, Vidi, Posti
@fledermaus avatar
2007 LX150 2015 GTS (on the bench) 2017 BV 350
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Posts: 12106
Location: Fond du Lac, Wisconsin
UTC quote
Coddy wrote:
More importantly, that is some seriously impressive MPG figures.
UTC

Veni, Vidi, Posti
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Location: Tega Cay, SC
 
Veni, Vidi, Posti
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Location: Tega Cay, SC
UTC quote
Bear in mind that those MPG figures are with the UK gallon. So, about 119 MPG here with the US gallon, but still not bad at all.
@steelbytes avatar
UTC

Veni, Vidi, Posti
2019 GTS300 Supertech E3 60,000km
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Posts: 5710
Location: Batmania aka Melbourne, Australia
 
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@steelbytes avatar
2019 GTS300 Supertech E3 60,000km
Joined: UTC
Posts: 5710
Location: Batmania aka Melbourne, Australia
UTC quote
Well for the mpg on a Primavera in the app:

pre - Euro 5: the injection timing and rpm are retrieved from the ecu and mashed together to create litres/hour.

Euro 5: the throttle and rpm are mashed together (using different consts for a 125 vs 150) to create the litres/hour.

The litres/hour is then mashed with the speedo to create kms/litre which is displayed in the users preferred units.

Of course such estimation ain't gonna be perfect ...

Bonus comment: the app does check if the phone's regional settings are US or not and uses US or UK gallons. No idea what the dashboard does for this distinction - does it offer the user the choice, too lazy to dig through the manuals?

PS for a GTS the ecu supplies the litres/hour directly. (injection timing is also avail but not used in these calcs)
@jimc avatar
UTC

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The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
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@jimc avatar
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
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Location: Pleasant Hill, CA
UTC quote
One would have thought counting injection pulses would be the most accurate. Or at least the most consistent.

Firkins per furlongs next... Razz emoticon
@steelbytes avatar
UTC

Veni, Vidi, Posti
2019 GTS300 Supertech E3 60,000km
Joined: UTC
Posts: 5710
Location: Batmania aka Melbourne, Australia
 
Veni, Vidi, Posti
@steelbytes avatar
2019 GTS300 Supertech E3 60,000km
Joined: UTC
Posts: 5710
Location: Batmania aka Melbourne, Australia
UTC quote
jimc wrote:
One would have thought counting injection pulses would be the most accurate. Or at least the most consistent.
The ECU can do a more accurate calculation of litres/hour. This is because it of course has the timing of every single injection. The piaggio app only gets a sample of things every 250ms.

So why doesn't the prima get litres/hour from the ecu? Because I'm pretty sure that ecu (EFI Tech) doesn't make this available on the canbus unlike the gts ecu (Magnetti) which does.


* Bonus note my app uses 100ms on PMP2, haven't tested to see how fast I can push PMP3.
@jimc avatar
UTC

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The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
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Location: Pleasant Hill, CA
 
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@jimc avatar
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
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Location: Pleasant Hill, CA
UTC quote
SteelBytes wrote:
The ECU can do a more accurate calculation of litres/hour. This is because it of course has the timing of every single injection.
Which is pretty much counting injection pulses.
Quote:
The piaggio app only gets a sample of things every 250ms.
That is.. ...slow.
Quote:
So why doesn't the prima get litres/hour from the ecu? Because I'm pretty sure that ecu (EFI Tech) doesn't make this available on the canbus unlike the gts ecu (Magnetti) which does.


* Bonus note my app uses 100ms on PMP2, haven't tested to see how fast I can push PMP3.
Push it.
@steelbytes avatar
UTC

Veni, Vidi, Posti
2019 GTS300 Supertech E3 60,000km
Joined: UTC
Posts: 5710
Location: Batmania aka Melbourne, Australia
 
Veni, Vidi, Posti
@steelbytes avatar
2019 GTS300 Supertech E3 60,000km
Joined: UTC
Posts: 5710
Location: Batmania aka Melbourne, Australia
UTC quote
jimc wrote:
Push it.
I have the rate configurable but don't have a PMP3 scoot to test on. Waiting for a user to do some testing and let me know what is stable then I can set a default.

Note: PMP3 uses Bluetooth LE which is slower than PMP2 which uses Bluetooth 'classic'. ie piaggio took a backwards step when switching to a new supplier: pmp3 is made by Hella (india) and pmp2 is by DQuid (italy)
OP
@jakem avatar
UTC

Addicted
Vespa Sprint Sport S 125cc
Joined: UTC
Posts: 661
Location: Brighton, England
 
Addicted
@jakem avatar
Vespa Sprint Sport S 125cc
Joined: UTC
Posts: 661
Location: Brighton, England
UTC quote
Shebalba wrote:
I want my 2 miles...
Love it! ROFL emoticon
Tierney wrote:
I don't really know where your 2 miles are, but I was going to suggest you lighten up the key ring that has the Vespa key on it. This is known to cause havoc with the ignition switch after a while.
Thanks, I wasn't aware of this! I've decided to separate off my blue key now, and will either run it on its own or with a small single keyring to make it more visible.
SteelBytes wrote:
ok, I dug into this for you. App bug unsurprisingly.

Thanks! Very interesting to hear how they've calculated all of this!
Coddy wrote:
More importantly, that is some seriously impressive MPG figures.
90% of the time, I always use full throttle launches. I found my clutch would get glazed with slower launches and would take a few weeks to clean back up again.

I think the key to the mpg has been that my favourite roads are 30-40mph roads as I'm a "big fish in a small pond". I can filter at traffic lights, and I've got pace to overtake.

I still do use some 60mph roads on a daily basis though. I top out at 60mph, but I've noticed that modulating the throttle and sitting at 50-55mph is much better for mpg than going full throttle for 20 minutes or so at a time.

My favourite two mpg figures were going over the alps into Italy. Big difference between climbing and dropping back down! ROFL emoticon
Climbing the alps!
Climbing the alps!
Dropping down from the alps
Dropping down from the alps
@chachi13 avatar
UTC

Member
2022 Primavera 150
Joined: UTC
Posts: 44
 
Member
@chachi13 avatar
2022 Primavera 150
Joined: UTC
Posts: 44
UTC quote
jimc wrote:
Not only that, but the hole in the Vespa key isn't that strong - you could lose all the other keys just going over a harsh bump.
Good point! There's no metal in the loop it's just plastic.
Forum member supplied image with no explanatory text
@steelbytes avatar
UTC

Veni, Vidi, Posti
2019 GTS300 Supertech E3 60,000km
Joined: UTC
Posts: 5710
Location: Batmania aka Melbourne, Australia
 
Veni, Vidi, Posti
@steelbytes avatar
2019 GTS300 Supertech E3 60,000km
Joined: UTC
Posts: 5710
Location: Batmania aka Melbourne, Australia
UTC quote
Chachi13 wrote:
Good point! There's no metal in the loop it's just plastic.
that happened to the key for my old gts which has that soft-ish feeling plastic.

the key with my hpe is a harder plastic and is lasting just fine.

here's some solutions (not sure how the aluminium ones go with the immobiliser)

https://www.aliexpress.com/item/1005003945281414.html
https://www.aliexpress.com/item/1005001596186044.html
https://www.aliexpress.com/item/1005006858478681.html
https://www.aliexpress.com/item/1005006130992052.html
@chachi13 avatar
UTC

Member
2022 Primavera 150
Joined: UTC
Posts: 44
 
Member
@chachi13 avatar
2022 Primavera 150
Joined: UTC
Posts: 44
UTC quote
SteelBytes wrote:
that happened to the key for my old gts which has that soft-ish feeling plastic.

the key with my hpe is a harder plastic and is lasting just fine.

here's some solutions (not sure how the aluminium ones go with the immobiliser)

https://www.aliexpress.com/item/1005003945281414.html
https://www.aliexpress.com/item/1005001596186044.html
https://www.aliexpress.com/item/1005006858478681.html
https://www.aliexpress.com/item/1005006130992052.html
Super cool thank you!
Forum member supplied image with no explanatory text
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