Update Rate not stable

Filo221

Hi all, I have a GPS Antenna whit 20Hz Update Rate. I'm enough sure that update rate (output antenna) is 20Hz, but on my app Racechrono Rate is non fix to 20Hz? Why?

Filo221

[upl-image-preview url=https://racechrono.com/forum/uploads/278/ZNWTD9Q7NHIQ.png]

aol

Bluetooth throughput problems. Self build I assume?