Under the "Flash" section, click the file browser icon and select your downloaded ats20_firmware.hex file.
Click the button and select your downloaded ATS20 .hex firmware file.
It introduces full Single Sideband (SSB) support with ultra-fine tuning steps down to 50 Hz, critical for clean ham radio or utility broadcast listening.
If you want to fine-tune your configuration, please let me know: ats20 firmware
Upgrading your ATS20 firmware unlocks the true potential of the underlying SI4732 chip. Alternative firmware packages radically transform the user experience, adding advanced filtering, smoother SSB (Single Sideband) performance, and better battery management. Why Upgrade Your ATS20 Firmware?
Go to > Board > Arduino AVR Boards and select Arduino Nano (the standard internal board architecture for most ATS20 units).
A short press on the 'Band-' button opens the menu, while a long press allows quick scrolling. Under the "Flash" section, click the file browser
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.
The most significant development in the ATS20 ecosystem is the community-developed firmware, often referred to as the . Created by an independent developer, this firmware is widely regarded as the "must-have" upgrade for the ATS-20X (users must verify hardware compatibility before flashing).
This firmware, created by developer Goshante, is based on the foundational work of PU2CLR and was inspired by the closed-source swling.ru project. Its latest stable release, version 1.18, is a complete reimagining of the user interface and feature set. If you want to fine-tune your configuration, please
By applying the latest , you can maximize the capability of your radio, making it a powerful tool for shortwave listening (SWL) and ham radio exploration in 2026. Need Help? If you tell me what specific version of the
The ATS20 community relies heavily on open-source developers who adapt software for the SI4732 chip. 1. The Ricardo Caratti (PU2CLR) Library
Solution: The firmware code likely has the wrong I2C address mapped for your specific screen, or it is configured for a different display controller (e.g., SH1106 instead of SSD1306). You will need to check the code settings or download a firmware variant tailored to your exact screen model.