Hands-free training assistant on an M5Stack Core S3, guided by sound, colour and light. One unit for interval training, two for reaction games over ESP-NOW. No network, no app.
arduino firmware fitness platformio imu fastled climbing hiit reaction-time m5stack interval-timer hangboard esp-now esp32-s3 reaction-training m5stack-core-s3
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Updated
Aug 4, 2026 - C++