Traccar - device accuraccy

Hello,
I have some devices (watch protocol). Device send this message to server (Traccar v 3.17):

[3G*2706022652*008F*UD,261018,173435,V,50.648922,N,13.8476117,E,0.00,0.0,0.0,0,20,3,0,0,00000001,3,255,230,1,14418,27492,120,14418,27493,118,14418,26644,115,0,23.3]

By the device protocol specification, the last number in message (23.3) is device accuraccy. Why in web interface is accuraccy set to 0?

When I am using osmand device, accuraccy is set and works good.

Thank you and have a nice day.

It's not decoded.

Thank you for your answer. And that is mean, that it need to be written in traccar source code? Please, where to start?

Thanks

Yes. Start in watch protocol decoder.