Mood-Light-Lamp

An interactive smart lamp that dynamically adjusts lighting based on touch, motion, and sound inputs, now also remotely controllable via Wi-Fi.

info

Author: Băițan Raluca-Mihaela
GitHub Project Link: https://github.com/UPB-PMRust-Students/project-RalucaBaitan

Description

This project is a mood-responsive RGB lamp powered by a Raspberry Pi Pico W. It uses a Finite State Machine (FSM) to manage and cycle through a set of interactive lighting modes:

• Calm Fade – slow transitions through pastel tones
• Party Pulse – color changes reacting to sound intensity
• Focus Blink – soft white pulsing to aid concentration
• Ambient Wave – moving color gradients triggered by motion

A capacitive touch sensor allows users to cycle between modes, while two tactile buttons toggle the reactivity of sound and motion sensors. The project also supports Wi-Fi control, enabling users to change settings or monitor the current mode from a web interface or mobile device.

Motivation

I was inspired to create a light-based project that was not only aesthetic and responsive but also deeply interactive. I wanted a relaxing but smart device that adapts to ambient conditions. Adding Wi-Fi allowed me to elevate it from a basic RGB lamp to a remotely configurable IoT device, aligning with the current trends in smart home environments.

Architecture

Components Overview

Raspberry Pi Pico W

• Role: Controls all components, manages state transitions, and hosts the Wi-Fi server.
• Connections: GPIO2 (LEDs), GPIO3 (Touch), GPIO4 (Motion), GPIO5–6 (Buttons), GPIO26 (Sound sensor)

WS2812 LED Strip

• Interface: PIO
• Modes: Calm fade, party pulse (audio-reactive), ambient wave, focus blink

Touch Sensor (TTP223)

• Interface: Digital input
• Role: Cycles FSM states on tap

PIR Motion Sensor

• Interface: Digital
• Role: Triggers effects based on presence

Sound Sensor (KY-038)

• Interface: Analog (ADC)
• Role: Reacts to ambient sound

Tactile Buttons (x2)

• Role: Toggles for sensors

Wi-Fi Web Interface

• Interface: HTTP API
• Role: Remote mode switch & sensor control

Log

Week 5 – 11 May

Basic FSM structure completed, sensors tested, LED test patterns implemented using ws2812-pio-rs. Mode logic mapped on paper.

Week 12 – 18 May

Week 19 – 25 May

Hardware

Device	Usage	Price
Raspberry Pi Pico W	Main controller with Wi-Fi	40 RON
WS2812 RGB LED Strip (1m)	Dynamic lighting effects	25 RON
KY-038 Sound Sensor	Audio input	6 RON
PIR Motion Sensor	Motion detection	9 RON
TTP223 Touch Sensor	Touch control	3 RON
Tactile Push Button x2	Sensor toggles	2 RON
5V USB-C Power Supply	System power	20 RON
Breadboard, wires, resistors	Electrical wiring	10 RON

Schematics

Software

Library	Description	Usage
embassy-rs	Async executor for embedded Rust	Task scheduling and I/O
ws2812-pio-rs	WS2812 driver using RP2040 PIO	LED animations
rp2040-hal	HAL for Raspberry Pi Pico	Access peripherals
adc-rs	ADC driver	Analog input from sound sensor
rtic	Real-time interrupt concurrency	FSM + timers
portable-atomic	Shared-state across tasks	Button toggle logic
smoltcp	Embedded TCP/IP stack	Web control over Wi-Fi
tiny-http	Lightweight HTTP server	REST API for remote use

Links