Here’s a short, interesting take on the ATS20 firmware — written in a style that’s part technical insight, part discovery log.
Title: ATS20 Firmware Deep Dive: Which one gives the best performance? ats20 firmware
The ATS20 (often called the ATS-20+) is a portable all-band radio based on the Si4732/Si4735 chip and an Arduino-compatible microcontroller. Updating the firmware is a popular way to add features like SSB (Single Side Band) support, RDS, and better battery monitoring. Preparation & Required Tools Before starting, ensure you have the following: Here’s a short, interesting take on the ATS20
Unlocking Potential: A Guide to Firmware Upgrades and its successor, the Updating the firmware is a popular way to
| Symptom | Likely Cause | Solution |
| :--- | :--- | :--- |
| Screen is white/blank | Wrong clock speed set (should be 8 MHz internal). | Recompile firmware for 8 MHz in Arduino IDE. |
| Buttons do nothing | Pin mapping mismatch (ATS20 vs ATS20+). | Download the correct board variant file. |
| SSB sounds like "Donald Duck" | BFO frequency is wrong. | Re-calibrate via hidden menu (PPM adjustment). |
| Programmer fails (Error: 0x00) | No power to chip or wrong RESET timing. | Add a 10uF capacitor between RESET and GND on the programmer. |
| Battery meter shows 0% | Voltage divider resistors differ on your PCB. | Edit the firmware’s BAT_READ pin value and recompile. |
Most "out of the box" ATS20 units come with basic, sometimes buggy, factory firmware. Updating to community-driven versions offers several transformative benefits:
: The foundational community firmware that many others are built upon. It provides reliable SSB support and expanded band coverage. Key Feature Improvements Lets upgrade the ATS 20+