Ats20 Firmware Here

What are you hoping to add? (e.g., better SSB tuning, a spectrum display, or a larger font?) What operating system are you using to flash the radio?

This is the "holy grail" for many users. Advanced firmware allows you to listen to amateur radio (HAM) operators, utility stations, and maritime communications by enabling LSB (Lower Side Band) and USB (Upper Side Band) modes. ats20 firmware

Download XLoader (simple GUI for Windows) or install the Arduino IDE (if compiling .ino source files). What are you hoping to add