Finding NMEA device connection fault [SOLVED]

how i can track time?

I don't want to use any delay() in my system - so i don't know cycle time.

May be i can use timer for this?

I can find why wind sensor need to reset - this is prototype, not my development - and it is "black box" for me. My tasc

Short wiring i use- 1.5 meter long, screened, i have good power source and i check power with oscilloscope - no ripple found. So i think - this is inside of sensor.