The real magic happens when you realize:
Often tailored specifically to the ATS20 button layout and OLED screen layout without requiring code tweaks.
Firmware is the built-in software that tells your ATS20 hardware how to operate. Because the ATS20 is built on the Arduino framework and utilizes the Silicon Labs SI4732 radio chip, its firmware dictates everything from screen layouts to digital signal processing. Why Upgrade Your Firmware?
Updating the ATS20 firmware is a crucial process that ensures the device remains functional and secure. Here are the general steps involved in updating the firmware:
I can provide the exact code tweaks or download paths matching your setup. Share public link ats20 firmware
Set the to 57600 (standard for Nano bootloaders) or 115200 . Step 3: Flash the Firmware Turn on the ATS20. Click the Upload button in XLoader.
: Many users report that the onboard USB port doesn't allow direct flashing. In these cases, a USBasp V2 programmer or using an Arduino Uno as an ISP is required. Standard Flashing Procedure (Via USB)
The Ultimate Guide to ATS20 Firmware Updates: Features, Installation, and Troubleshooting
Connect the located above the "USB download" label (not the charging port) to your PC. Turn the radio ON. 3. Configure the Software (AVR Dudes) The real magic happens when you realize: Often
Flashing new firmware is surprisingly simple, but you must be careful.
Complete Guide to ATS20 Firmware: Upgrades, Features, and Troubleshooting
Which of the ATS20 do you have (e.g., standard micro-USB, updated Type-C, or the ATS20+)?
Download the .ino or .hex file from a reputable source like GitHub (search for "SI4735-Arduino-Library-master" by PU2CLR). Why Upgrade Your Firmware
If you flash new firmware, don't forget to recalibrate the Si5351 PLL. Your frequency will be off by ~500 Hz otherwise. Use a WWV signal at 10 MHz or 15 MHz to dial it in via the hidden calibration menu (usually Menu -> System -> Cal).
Unlocks full access to LW (Long Wave), MW (Medium Wave/AM), SW (Short Wave), and FM bands.
Open your flashing software (e.g., AVR Dudes) and set the following parameters, as recommended in this YouTube guide : STK500 V1 (Arduino bootloader).