Hi Harry,
I want to ask about one thing. Sometimes I´m using speedo because it can measure avg speed. It´s usefull on roads in radar controled sections (point to point measuring). But I found a little "bug". App can´t measure avg speed with only OBD speed (in tunels). It needs GPS for it.
It´s a normal behavior?
Speedo and avg speed via OBD
- PitrsRS
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Speedo and avg speed via OBD
2016 SEAT Leon CUPRA 290 ST
HLT Grand Prix (Android) + OBDLink LX BT + XGPS160 + GoPro 11 Black + GoPro 7 Black
HLT Grand Prix (Android) + OBDLink LX BT + XGPS160 + GoPro 11 Black + GoPro 7 Black
Re: Speedo and avg speed via OBD
Avg speed is derived from distance driven and time required, not some integration of actual speed values. Something like this could be done, although it requires some numeric tweaking due to the influence of data and calculation inaccuracies. Not trivial.
Harry
Harry
Re: Speedo and avg speed via OBD
PS As long as the tunnel is straight, you should see proper values after leaving the tunnel again.
- PitrsRS
- 20 or more Posts ★★★
- Posts: 156
- Joined: Wed Jun 25, 2014 9:43 am
- Location: Prague, Czech Republic
Re: Speedo and avg speed via OBD
Ah, thanks for explanation. The tunel, where I needed most, is complicated, there are changes in elevation, corners etc. We have there 5-6 measured sections and sometimes speed limit is changed from 70 to 50 or 50 to 70 during passing (it depends on how heavy actual traffic is at the moment)
But. Distance could be calculated from speed and time, and these 2 values we have.
But. Distance could be calculated from speed and time, and these 2 values we have.
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2016 SEAT Leon CUPRA 290 ST
HLT Grand Prix (Android) + OBDLink LX BT + XGPS160 + GoPro 11 Black + GoPro 7 Black
HLT Grand Prix (Android) + OBDLink LX BT + XGPS160 + GoPro 11 Black + GoPro 7 Black