Elias had tried to flash a custom firmware build he found on an obscure radio forum. He wanted the promised "extended FM range" and the "hidden digital mode decoder." But halfway through the transfer, his laptop had forced an update, the USB connection severed, and the ATS-20’s screen turned into a blank, backlit void.
: Click "Upload." The LEDs on your receiver's internal board will flash rapidly. Once complete, the radio will reboot with the new firmware interface. Troubleshooting Common Issues
you have (e.g., 20 or 20+), I can help find the and driver installation steps . If you'd like, I can: ats20 firmware
: Fine-tune signals with smaller step increments (down to 1 kHz or less).
The ATS20 firmware is the open-source coding that bridges the hardware (the SI4732 RF chip, the Arduino Nano, the OLED screen, and the rotary encoder) with the user interface. Because the device is built on the Arduino ecosystem, its firmware can be easily modified, compiled, and flashed using a standard USB connection. Elias had tried to flash a custom firmware
The firmware provides access to the SI4732's internal Digital Signal Processing:
Ensure your PC recognizes the CH340 chip. Without this, the computer cannot communicate with the radio. 2. Connect the Radio Once complete, the radio will reboot with the
Fine-tuning steps (down to 1 kHz or less) make clarifying SSB voice and Morse code (CW) significantly easier.
Your computer needs the CH340 USB driver installed to communicate with the radio.
Open your PC’s and look under Ports (COM & LPT) to find the assigned COM port number (e.g., COM3). Step 2: Configure XLoader Download and extract XLoader . Launch the XLoader.exe application.
Note: The IU5JAE firmware requires the "Plus" version of the radio (ATS-20+) or a specific hardware modification (adding a 3.3V level shifter) for the original ATS-20.