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Wrong signal from GPS devices

Topic: Wrong signal from GPS devices

Sometimes GPS  devices send wrong signal for speed . i don't know the reason for this wrong signal . and how can i overcome for this issues ? because it making with my customers a big problems and sometimes many customers ends the contract  due to lack of credibility in the data.
so are you know the reasons ? and how solve it ?
thanks

2

Wrong signal from GPS devices

Re: Wrong signal from GPS devices

From Wialon side you can try to filter data with Messages validity filtration on the 'Advanced' tab of unit properties. For example, by option 'Max speed' or 'Maximum HDOP value' (depends on the data in messages). Please, see more https://docs.wialon.com/en/hosting/cms/ … filtration

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Wrong signal from GPS devices

Re: Wrong signal from GPS devices

Wondering from where "wrong" speed messages are comming...
Which HW do you use? Is speed calculated by Wialon or by the Device?

From Speed which was calculated by Device i never heard of serios wrong values!

Wolf

Politeness dictates it to write his name on a post
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Wrong signal from GPS devices

Re: Wrong signal from GPS devices

kmal wrote:

Maximum HDOP value'

the default value for Maximum HDOP value=2 . what about if i changed it to 4 . it will be good or no

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Wrong signal from GPS devices

Re: Wrong signal from GPS devices

wwbusch aka Buwo wrote:

Wondering from where "wrong" speed messages are comming...
Which HW do you use? Is speed calculated by Wialon or by the Device?

From Speed which was calculated by Device i never heard of serios wrong values!

Wolf

yes. and we don't  know the reason

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Wrong signal from GPS devices

Re: Wrong signal from GPS devices

what HW do you use?

Politeness dictates it to write his name on a post
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Wrong signal from GPS devices

Re: Wrong signal from GPS devices

wwbusch aka Buwo wrote:

what HW do you use?

teltonika and BCE

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Wrong signal from GPS devices

Re: Wrong signal from GPS devices

zayedsaid14 wrote:
kmal wrote:

Maximum HDOP value'

the default value for Maximum HDOP value=2 . what about if i changed it to 4 . it will be good or no


It's a rare value of hdop actually, if you get invalid huge values it's better to use 'Max speed' filtration. In other cases it may concern a device operation issues. From the side of Wialon I can also suggest you to try using 'GPS coordinates' as a movement detection in Trip Detection

Technical Support Department