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Tech Talkies built walkie-talkies using Seeed Studio XIAO ESP32S3 Sense boards and ESP-NOW over Wi-Fi, avoiding radio license requirements. The devices use a MAX98357A I2S amplifier, PTT button, and thread-safe audio buffering. External antennas provide roughly 200 meters of outdoor range.

GitHub user Lagerpun released a pixel aquarium app for the ESP32 CYD (Cheap Yellow Display). The app includes fish, plants, drifting food, a 12-hour clock with NTP sync, and auto-dimming via light sensor. Code and instructions are available on GitHub for the 2.8-inch touchscreen.

An ESP32-S3 handheld controller features a 2.0-inch color display, dual analog sticks, haptics, IR, and USB-C. The device can act as a standalone handheld or a controller with real-time video on its screen. Kickstarter pricing starts at $55 for early birds, with a regular price of $59.

The Veltoc Model 01 is an ESP32 e-Ink monitor that tracks temperature, humidity, and pressure. It has a retro look with an e-Ink display. The code and 3D files are on GitHub. Building it avoids buying simple devices and allows easy repairs.
FlightScnr uses an ESP32-S3 R8 microcontroller and ADSB route APIs to display live overhead flights on a 3D-printable desk radar. It runs without soldering or coding, caches data to stay under free API limits, and features a local web interface via Wi-Fi captive portal. The device uses a LilyGO T-Encoder Pro for screen and scroll wheel interaction.
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