RTL-SDR Live POCSAG Pager Decoder on a $15 ESP32 Display An RTL-SDR running on a Pi4 decodes live POCSAG pager traffic and publishes it over MQTT. A $15 ESP32 touchscreen display subscribes and shows pages in a retro green-on-black UI. Full build guide including the CYD display config that took way too long to find.
Meshtastic Scrolling Meshtastic Messages on an 8x32 WS2812B LED Panel: Custom Firmware, MQTT, and the Decryption Part Nobody Explains A custom ESP32 build that subscribes to Meshtastic's encrypted MQTT topic, decrypts packets on the fly, and scrolls messages across a WS2812B 8x32 LED panel. Full build guide: parts, wiring, PlatformIO flashing from scratch, and MQTT setup.
