Mirko “mircemk” Pavleski developed a simple ESP32-based spectrum analyzer. The CrowPanel 3.5 is used with a 480×320 touchscreen LCD, while similar results can also be achieved with different displays. A few passive circuit components are sufficient to route the analog audio signal to the ESP32’s ADC pin.
Background
ESP32 is not a new name in the FikirPilot archive: we have published 7 news reports mentioning it in the past 90 days; the latest is dated 24 September 2026.