Ats-20- — Firmware

: Newer versions may use the ATmega328PB (instead of 328P), which can be more difficult to flash via standard USB methods. Flashing Procedure

: Widely considered the gold standard for the ATS-20+. It features a completely reworked interface with readable fonts, a functional S-meter, and a unified shortwave (SW) band that removes the friction of switching between small sub-bands. Ats-20- Firmware

Flashing new firmware to the ATS-20 requires a USB-to-Serial adapter (like an FTDI or CP2102, often sold separately), a computer, and a steady hand. Incorrect wiring can fry your STM32 chip. : Newer versions may use the ATmega328PB (instead

Before attempting an update, you need to know what is currently running on your device. a functional S-meter