Atu-10 Firmware [2021] Link

The primary complaint with budget tuners is the time it takes to find a match. Custom firmware often employs a "modified binary search" or "Adaptive L" algorithm. Instead of clicking through every relay combination, the software makes educated guesses based on the frequency and initial SWR reading. This reduces tuning time from 10 seconds to under 2 seconds in many cases.

#define MIN_POWER 0.5 // Sets minimum tune power to 0.5 Watts atu-10 firmware