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PROJECT RoPOT

5/25/2022

This was a final project at the end of my DEC in CEGEP. It required that we use an arduino to create an IoT device. My partner and I then spent about 9 months creating the ROPOT. From breadboard diagrams, PCB design, 3D modeling, hand soldering, parts sourcing, programming, html website design, this thing really had it all. I love it very much.

Stuff I did:

  • Embedded networked system: runs a self-hosted HTTP server in Wi‑Fi AP mode (no external infrastructure), parses simple HTTP requests, serves dynamic HTML with sensor-driven values and UI state.

  • State-machine behavior design: dehydration handled as an explicit finite-state progression (state/next_state, timed by millis()), producing deterministic, testable outputs (notifications/audio/actuation) per state.

  • Real-time-ish scheduling pattern: uses a non-blocking timer (previousMillis/interval) to trigger periodic evaluation rather than relying only on delays (even though some delays remain).

  • Cross-module integration: clean integration of multiple subsystems (WiFiNINA + I2C sensor + servo PWM + serial-controlled soundboard) into one cohesive control loop.

  • Calibration/control endpoint: user-triggered threshold capture via a web route (GET /H) is effectively a small configuration protocol over HTTP, not hardcoded tuning.

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