new custom device

hi anton, I have a custom device make with arduino, but I don't convert date to timestamp with osmand. any port can I use for my device ?
thank you

What kind of question is that? Every port uses completely different protocol format. What does timestamp has to do with it?

this anton, my formate date is

/?id=902064&lat=42.06288&lon=-88.23412×tamp=2017-09-17 15:20:23&hdop=6.0&altitude=224.0&speed=0.0

my arrow can't follow direction

Do you send direction?

how to send direction for osmand?

You can use "heading" or "bearing" parameter.