Solution: The button pin assignments in the new firmware do not match your physical hardware layout. Revert to a factory binary or locate a firmware version designed explicitly for the "ATS20 SI4732" pinout. Maximizing Performance Post-Update
Various ham radio enthusiasts distribute pre-compiled .hex or .bin files via GitHub and forums. These community mods often feature:
radios use the cheap to communicate with your computer.
The ATS20 (often sold as the ATS-20+ or SI4732 Radio) is one of the most popular budget-friendly shortwave receivers on the market. Out of the box, this compact device offers impressive frequency coverage, including FM, AM, LW, MW, and SW bands. However, the stock firmware often leaves a lot to be desired, frequently suffering from sluggish tuning, unoptimized screen layouts, and limited features. ats20 firmware
If you are searching for firmware today, you’ll likely encounter the . This version often features a larger battery, better filtering, and, crucially, firmware that supports a wider frequency range (sometimes down to 150kHz for Longwave).
While stock software suffices for casual FM listening, custom options transform the device into a highly responsive shortwave and Single Sideband (SSB) powerhouse.
Open command prompt and run:
Several radio experimenters have released excellent choices for this platform:
Choosing the right firmware depends entirely on your user interface preferences and whether you want advanced, menu-driven control or a traditional layout. Firmware Option Core Strengths Target User PU2CLR Stock/Modified
: Grants access to precise tuning increments. Get 1/5/9/10/50/100k/1M steps in AM, and down to 10/25/50/100/500Hz steps for razor-sharp Single Sideband (SSB) resolution. Solution: The button pin assignments in the new
The firmware, currently at version v1.18, is a complete rework of the radio's software. It offers a significantly enhanced user experience and many new features:
The short answer is an unequivocal . Upgrading the firmware is arguably the single most important thing you can do for your ATS-20 or ATS-20+.
The stock firmware is limited in features and can have quirks, such as audio pops or clicks, or less-than-ideal tuning mechanisms. This is where custom ATS20 firmware excels. The open-source nature of the Arduino platform allows developers to completely reimagine the radio's interface and functionality, turning a good receiver into an excellent one. These community mods often feature: radios use the
: Upgraded firmware enables upper sideband (USB) and lower sideband (LSB) reception, which is critical for listening to amateur radio operators.