Phase 2 Recap: From Two Motors to an Autonomous Robot — Part 21

New here? This is the recap of Phase 2 — the journey from a Raspberry Pi with no purpose to a fully autonomous, voice-controlled, web-dashboard-equipped robot that maps its surroundings. If you want the play-by-play, Parts 12 through 20 have it all. This is the "what we actually built and why it matters" version.

The Autonomous Obstacle-Avoiding Robot — Part 20: Phase 2 Boss Fight

New here? This part combines everything built in Parts 13–19 into one robot: autonomous driving, obstacle avoidance, camera-based steering, voice control, room mapping, and a web dashboard — all running together. If any individual piece feels unfamiliar, the part that introduced it is linked throughout. Otherwise, let’s go.

Simple Room Mapping with Raspberry Pi and HC-SR04 — Part 19: The Robot Remembers Where It's Been

New here? This part adds basic room mapping to the C101 robot — as it drives, it builds a simple grid map showing where obstacles are. The setup builds on Parts 12–18. If the Raspberry Pi environment feels unfamiliar, Part 12 has the full walkthrough. Otherwise, let's go.

WiFi Robot Control Panel with Flask and Raspberry Pi — Part 18: The Robot Gets a Dashboard

New here? This part builds a web-based control panel for the C101 robot — open a browser on any device connected to the same WiFi, and you get buttons to drive the robot, toggle autonomous mode, and enable voice control. The setup builds on Parts 12–17. If the Raspberry Pi environment or remote connection feels unfamiliar, Part 12 has the full walkthrough. Otherwise, let’s go.

Voice-Controlled Autonomous Robot with Raspberry Pi — Part 17: Hey Robot, Move!

New here? This part adds voice control to the autonomous C101 robot from Part 16 — say "go" and it drives, avoiding obstacles on its own; say "stop" and it freezes. The setup builds on Parts 12–16. If remote connection via SSH or VNC feels unfamiliar, Part 12 has the full walkthrough. Otherwise, let's go.

Autonomous Obstacle-Avoiding Robot with Camera and Ultrasonic Sensor — Part 16: The Robot Sees, Senses, and Decides

New here? This part combines the HC-SR04 ultrasonic sensor from Part 14 and the Pi Camera from Part 15 into one autonomous system — the robot drives, detects obstacles, analyzes which direction is clearer, and steers accordingly. If the hardware setup or remote connection feels unfamiliar, Parts 12–15 have the full context. Otherwise, let’s go.

Adding Eyes to the Robot with Pi Camera and OpenCV — Part 15: The Robot Learns to Look

New here? This part adds a Pi Camera to the C101 robot and runs live object detection and obstacle awareness using OpenCV — no heavy AI model required. The setup builds on the Raspberry Pi environment from Part 12.