The ATS20 firmware is essentially an . It leverages the powerful SI4732 DSP chip to provide features usually found in $200+ radios (like SSB reception and bandwidth filtering) in a $30 device. The ability to re-flash the firmware via USB (using the STM32 bootloader) makes it a favorite for hackers who want to add their own features or fix bugs.
While IU5JAE is the most popular, other developers have contributed:
Run a verification check. If AVRDUDE reports "0 errors," disconnect the programmer, reassemble the radio, and turn it on.
Click "Upload." The LEDs on the internal Arduino will blink rapidly. Once finished, the radio will reboot into the new interface. Pro-Tips for Success
The firmware unlocks the full potential of the SI4732 chip, allowing it to receive:
Modifying the ATS20 firmware requires advanced technical skills and knowledge of programming languages, such as C or C++. Here are the general steps involved in modifying the firmware:
While there is no formal "white paper" in the academic sense for the ATS-20 firmware, several comprehensive technical guides and community-developed manuals (often distributed as PDFs or GitHub documentation) serve as the definitive "papers" for this hardware The ATS-20 and ATS-20+ radios typically run on Atmel ATmega328P (Arduino Nano/Uno) or