The ATS_EX firmware by Goshante (v1.18) significantly upgrades ATS-20/ATS-20+ radios, providing improved signal metering, battery management, and an enhanced visual display. This third-party build resolves SSB noise issues and offers better tuning functionality over stock firmware through an Arduino Nano USB flash process. Detailed installation information and firmware files are available on GitHub . ATS_EX Firmware for ATS-20 DSP Receiver - GitHub
| Issue | Likely Cause | Exclusive Fix | | :--- | :--- | :--- | | | LCD driver mismatch (ILI9341 vs ST7735) | Recompile or find a build with "Auto-detect LCD" flag. | | Volume stuck at max | GPIO pin mapping changed | Open the case; temporary fix: remove R18 resistor. | | No SSB (silent) | BFO (Beat Frequency Oscillator) offset drifted | Use the hidden menu: Press Vol knob 2x, tune BFO to 1200 Hz. | | Encoder spins opposite | Phase A/B swapped | Exclusive builds usually allow "Encoder Reverse" in Config menu. | ats20 firmware exclusive
Upgrading to a version like offers several features not found in stock versions: The ATS_EX firmware by Goshante (v1
: The Beat Frequency Oscillator (BFO) is integrated into the main frequency control, eliminating the cumbersome dedicated BFO menu. Advanced Audio DSP Soft Mute Reduction : Dramatically reduces the "chuffing" noise during tuning. SSB Sync Mode : Includes a synchronous mode for better SSB reception. SVC (Automatic Volume Control) : Specifically optimized for Single Sideband (SSB) modes. Hardware Monitoring Battery Status ATS_EX Firmware for ATS-20 DSP Receiver - GitHub