Android Question Problem in the GPS speed

[webhost.company]

Hi,
I use the GPS library for my app.
My app is for car tablets to check speed and period service.
There is a problem.
I try show car speed on the label, but that is wrong value why?
My car is moving 40km per hour but my the app show 10 km per hour

 

[darabon]

Please help me guys

 

[Almora]

The speed of the car cannot be the same as the speed on the GPS satellite..

 

[agraham]

Check that Location.SpeedValid is True. If it is then Location.Speed should give your speed in metres/second. Your reading of 10 m/s is 36 km/hr.

 

[webhost.company]

I used GPS library and the my car monitor is tablet that have a location sensor

 

[webhost.company]

I used below code for convert
speed * 3.6
but that is not right value

 

[emexes]

but that is not right value

How do you know it is not the right value?

Car speedometers usually err on side of caution ie read higher than actual speed.

So if your speedometer is showing 40 km/h then it is entirely plausible that your actual speed is 36 km/h.

 

[webhost.company]

How do you know it is not the right value?

Car speedometers usually err on side of caution ie read higher than actual speed.

So if your speedometer is showing 40 km/h then it is entirely plausible that your actual speed is 36 km/h.

Because max speed is 10 km while I'm running a car with 100km or 50km
There is an app in the tablet monitor that show right speed
I guess tablet GPS has a problem

 

[DonManfred]

I used below code for convert
speed * 3.6
but that is not right value

If you get a value of 10Meter/Sec then you need to calculate KM/H with
speed = speed*60*60

36KM/H soundy plausible when your car shows 40KM/H

 

[DonManfred]

Please help me guys

If you have any issue you need help with then you should start a NEW THREAD for your Issue telling us what you need help with.

 

[emexes]

There is an app in the tablet monitor that show right speed
I guess tablet GPS has a problem

If there is an app on the same tablet that shows the right speed, then the problem is unlikely to be with the tablet.

Is your B4A app always showing 10 (m/s? km/h?) or does it show other numbers as well? Especially 0 when stationary.

Are you checking the SpeedValid flag too?

https://www.b4x.com/android/help/gps.html#location_speed

 

[webhost.company]

If there is an app on the same tablet that shows the right speed, then the problem is unlikely to be with the tablet.

Is your B4A app always showing 10 (m/s? km/h?) or does it show other numbers as well? Especially 0 when stationary.

Are you checking the SpeedValid flag too?

https://www.b4x.com/android/help/gps.html#location_speed

Thanks check it soon

 

[webhost.company]

If you get a value of 10Meter/Sec then you need to calculate KM/H with
speed = speed*60*60

36KM/H soundy plausible when your car shows 40KM/H

Thank you I will try it

 

[webhost.company]

If you get a value of 10Meter/Sec then you need to calculate KM/H with
speed = speed*60*60

36KM/H soundy plausible when your car shows 40KM/H

That's working for me Thanks DonManfred