Back in January, I did a workshop at CodeMash 2020 on soldering and programming an ESP32-based conference badge. It went very well, with near perfect success among the 50 or so participants. The hardware was simple to assemble, but somewhat limited in terms of peripheral capabilities – especially in regards to audio output.In the spirit of continuous improvement, I have prototyped the next generation of the badge, dubbed the “ESP32 R4ge Pro”. Enhancements include:CD-quality audioStereo speakers with volume controlMEMS microphoneA bigger and touch-sensitive screenFirmware-controlled screen dimmingTwin analog joysticksIntegrated battery chargingA number apps and games have already been created for the R4ge Pro in the GitHub repo, with more planned and in development. These include:Pong cloneDrum sequencerInternet radio playerWave recorder and FFT frequency analyzerFM SynthesizerBluetooth tank/robot remote controlGitHub repo documents folder also contains full schematic, bill of materials, and a simple case STL file.
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