Sentio - A Cute Companion Robot (ESP32-S3-Box-3)

Sentio is an interactive desktop companion robot that integrates advanced wireless communication, local processing, and sensor feedback using an ESP32-S3-Box-3 and an ESP32-CAM module. At the core of the system, the ESP32 boards run ESPHome and connect with Home Assistant to manage local automation tasks and handle video processing without relying entirely on external cloud servers. The robot interacts with its environment through several physical components: a TTP223 touch sensor module enables touch-based inputs, an MPU6050 accelerometer detects motion or orientation changes, and an MG90 micro servo provides mechanical movement for emotive expressions. Additionally, a 433MHz transmitter remote and an RX480-E receiver module allow for reliable wireless signaling, enabling functionalities like a remote doorbell or emergency paging system. Power is supplied by a 3.7V Li-Po battery, supported by a 477uF capacitor and a rectifying diode to stabilize the power delivery and protect the sensitive microcontrollers from electrical noise and voltage spikes generated by the moving servo motor. All these electronics are housed inside a custom 3D-printed PLA casing consisting of top, middle, bottom, and camera-specific sections, bringing together hardware and software into a functional desktop robotic platform.