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I try to track accurate vehicle speed by using the vehicle speed read from OBDII. I created a configuration:

Vehicle Speed
Priority: Low
Low Level: 0
High Level: 5
Event Only: No
Operand: On Delta Change

and the first record produced by the device contains vehicle speed 0 and the next one after 40 seconds contains vehicle speed 64.
Could you help me why there is a gap between the 2 records?
Can I use the vehicle speed from OBDII value in data acquisition settings?

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Hi.

Probably you should not set Operand to On Delta Change for speed, use On Change instead.