Raspberry Pi 5 Sensor Hub with Protected Power Tree, Teensy 4.1 Core, and 36‑Channel FSR Front-End

Compact 4-Layer Raspberry Pi 5 Sensor Hub with Teensy 4.1, 36-Channel FSR Network, SPI Encoders, and Qwiic IMU

Smart Chair V1: ESP32-C3-based seat-occupancy and posture sensing hub with 4× FSR channels and IMU over I2C, featuring corrected USB-C power wiring with TVS protection, remapped I2C on IO4/IO5 with pull-ups, dedicated PROG_TX/PROG_RX/BOOT/EN test pads, and antenna keep-out zone #consumer-electronics #BLE #I2C #USB-C #IoT