Some versions include a rudimentary scan feature to find active frequencies across the shortwave spectrum. The "ATS20+" and "v2" Evolution
Select the correct COM port and board (usually "Arduino Nano") and hit upload. Why Enthusiasts Love It
The ATS20 is a portable SI4732-based radio that typically covers FM, AM, and Shortwave (SW) bands. Out of the box, the factory firmware is often functional but limited—lacking fine-tuning controls, SSB (Single Side Band) stability, or a user-friendly interface.
The firmware for the ATS20+ is specifically tuned to handle the slightly different hardware layout and rotary encoder behavior found in the updated models. How to Update Your ATS20 Firmware
In this article, we’ll dive into what makes the ATS20 firmware special, how it improves your hardware, and why the "v2" or "ATS20+" variants are the current gold standard. What is the ATS20 Receiver?