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98 MicroPython IoT builds

IoT builds,
one board at a time.

Hands-on MicroPython projects for ESP32, ESP8266, Raspberry Pi Pico and XIAO — sensors, Wi-Fi, Bluetooth, cloud dashboards. Each with code, wiring diagrams and Wokwi simulation. Featured in the Adafruit newsletter and Hackster.io.

Auto Night Light

An ESP32 reads ambient light through an LDR and switches an LED on automatically after dark. A gentle first project covering analog input and threshol…

Dimmer LED

Turn a potentiometer to fade an LED smoothly using PWM on the ESP32. Teaches analog-to-digital conversion and duty-cycle control in one evening.

DHT11 Web Server

The ESP32 serves a live web page showing temperature and humidity from a DHT11 sensor. Your first step into Wi-Fi, HTTP servers, and sensor dashboards…

Seven Segment Display

Drive a single-digit 7-segment display with a Raspberry Pi Pico to count and show numbers. Covers GPIO wiring and segment mapping basics.

Mini Weather Station

An ESP8266 pairs a DHT11 with a 16x2 I2C LCD to show temperature and humidity at a glance. Compact build combining sensor reading with character displ…

RGB Color Mixer

Three potentiometers blend red, green, and blue channels on an ESP32-driven RGB LED. A hands-on way to learn multi-channel PWM.

LED Bar Graph

Ten LEDs light up in sequence as you turn a potentiometer, visualizing analog levels on the ESP32. Simple ADC-to-output mapping made visible.

MQ4 Gas Leak Detector

An MQ-4 sensor on the ESP32 watches for methane and sounds a buzzer when levels spike. Practical safety project with analog threshold alarms.

RTC Clock

A DS3231 real-time clock keeps time for the ESP8266, printed to the serial monitor. Learn I2C communication and battery-backed timekeeping.

IoT Button Counter

Three push buttons on the ESP8266 increment, decrement, and reset a counter shown on a live web page. Buttons meet Wi-Fi in a tidy starter project.

8x8 LED Matrix Display

Custom heartbeat animations scroll across a MAX7219 8x8 LED matrix driven by the ESP8266. SPI displays and frame buffers in MicroPython.

PIR Motion Detector

A PIR sensor on the Raspberry Pi Pico 2W flashes the onboard LED when movement is detected. The classic motion-sensing hello world.

Bluetooth LED Control

Send on/off commands from your phone over an HC-05 Bluetooth link to toggle an LED on the Pico 2W. UART messaging and wireless control basics.

Web Servo Controller

Drag a slider in your browser to swing a servo from 0 to 180 degrees over Wi-Fi on the Pico 2W. Web UI meets precise motor positioning.

ClimaPixel Weather Display

A tiny OLED shows temperature, humidity, and weather icons from a DHT11 on ESP32 or ESP8266. Pixel graphics and sensor fusion in miniature.

TM1637 Button Counter

Count button presses on a bright TM1637 4-digit display with the ESP8266. Two-wire display driving without the bulk of an LCD.

Day 17Smart Home

Relay Control Web Server

Flip a relay from any browser over Wi-Fi using the Pico 2W's smooth web interface. The foundation of every web-controlled appliance project.

Day 18Smart Home

Blynk Relay Control

Control a relay from the Blynk IoT app on your phone via the Pico 2W. Cloud dashboards with zero HTML required.

NTP Digital Clock

The ESP8266 syncs time over the internet and shows it on a TM1637 display. No RTC module needed — Wi-Fi is the clock.

IR Object Detector

An IR sensor spots nearby objects and triggers an LED and buzzer on the ESP8266. Proximity sensing for automation and robotics.

Day 21Smart Home

Password Lock System

Enter a code on a keypad to unlock — the ESP32 checks it and lights up an LCD and LEDs. Keypad scanning and access logic from scratch.

Blynk Fan Control

Switch a DC brushless fan from the Blynk app through a relay on the Pico W. Phone-controlled cooling in minutes.

Hotspot Setup

Configure the ESP32 as its own Wi-Fi access point for direct device connections. The networking building block behind captive portals and offline cont…

Day 26Smart Home

Clap Toggle Switch

Clap once to toggle a light on the ESP32 using a sound sensor. Sound-triggered control with debounce done right.

Day 27Smart Home

IR Telegram Alert

When the IR sensor trips, the ESP32 pings your phone via Telegram. Instant notifications from a five-dollar board.

Soil Moisture Detector

An ESP8266 reads a soil sensor and reports dry or wet conditions. The sensing core of every smart-garden project.

Rain Sensor Monitor

Detect rainfall intensity through analog readings on the ESP8266. Weather-aware automation starts here.

Ultrasonic Distance Meter

An HC-SR04 measures distance in centimeters on the ESP32. Echo timing and the physics of every parking sensor.

WebSocket LED Control

Toggle an LED from a web page with real-time WebSocket updates on the Pico W. Bidirectional browser-to-board communication.

MQ-135 Air Quality Sensor

The MQ-135 sniffs the air for harmful gases on the ESP32 and reports quality levels. Your own indoor air watchdog.

MQ-7 CO Sensor

Detect carbon monoxide with an MQ-7 on the ESP32 and raise an alarm. A focused safety build with real stakes.

Servo Motor Control

Position a servo precisely with PWM from the Pico 2W. The actuator behind robot arms and animatronics.

Day 35Smart Home

Touch Sensor LED

Tap a capacitive touch pad to toggle an LED on the ESP8266 — no moving parts. Modern touch interfaces on a classic board.

DHT11 Live Plotter

Stream DHT11 readings from the ESP8266 into live Matplotlib graphs on your PC. Sensor data visualization with Python.

XIAO 4-LED Controller

A CustomTkinter desktop app switches four LEDs on the tiny XIAO ESP32-S3. Polished GUI control for a pocket-sized board.

OLED Smart UI

An ESP32 OLED shows animated eyes, the time, and weather in one smart interface. Playful UI design on a 128x64 screen.

Stepper Motor Control

Drive a NEMA 17 stepper through an A4988 driver with the ESP32. Precise rotation for CNC, 3D printers, and robotics.

Async LED Control

Blink LEDs with non-blocking async code on the Pico W. Concurrency in MicroPython without the headache.

EEPROM Simulator

Emulate persistent EEPROM storage in flash on the ESP32. Save settings across reboots the embedded way.

DC Motor Web Control

Adjust a DC motor's speed from a browser slider via an L298N driver on the ESP32. Web-based motion control.

Temperature LED Indicator

A DHT22 on the ESP32 maps temperature to LED colors. At-a-glance climate feedback.

Flask LED Control

A Python Flask web app toggles an LED on ESP32 or Pico W. Full-stack IoT with a real backend framework.

Day 45Smart Home

Smart Cooling System

An ESP8266 spins up a fan automatically when the DHT11 reports heat. Closed-loop temperature control.

ThingSpeak Farm Monitor

Soil and weather data from the ESP8266 flow into ThingSpeak cloud charts. Remote farm sensing with free cloud logging.

Day 47Smart Home

Blynk Smart Irrigation

A XIAO ESP32-S3 waters plants on schedule through a pump and relay, supervised from Blynk. Automated gardening with phone oversight.

DHT11 Data Logger

The Pico 2W logs temperature and humidity over HTTP for later analysis. Simple, reliable environmental recording.

ThingsBoard Telemetry

Stream DHT11 telemetry to ThingsBoard and control an LED via RPC on the Pico 2W. Industrial-grade IoT dashboards.

BMP180 Barometer Monitor

Track atmospheric pressure and altitude with a BMP180 on the ESP32, visualized in Blynk. Weather forecasting hardware.

Day 51Smart Home

Blynk Smart Home

An ESP8266 orchestrates a DHT11 and relay as a mini smart-home hub in the Blynk app. One board, whole-room automation.

Sensor Anomaly Detector

ThingSpeak and MATLAB flag strange DHT11 and LDR readings from the ESP8266. Machine-assisted fault detection on sensor streams.

IoT Gas Monitor

Gas, temperature, and humidity from the ESP32 render as live Chart.js graphs via Flask. A full-stack air safety dashboard.

ESP-NOW LED Control

Toggle an LED across two ESP8266 boards with ESP-NOW peer-to-peer radio — no router needed. Low-latency wireless without a Wi-Fi network.

ESP-NOW Button Link

A button press on one ESP8266 lights an LED on another via ESP-NOW. Wireless input-to-output in its purest form.

Day 56Smart Home

ESP-NOW 4-Channel Relay

Drive four relay channels wirelessly from a single ESP8266 controller over ESP-NOW. Multi-zone switching without wires.

ESP-NOW Sensor Network

ESP8266 and ESP32 nodes share sensor data and relay states over ESP-NOW. A tiny mesh of cooperating boards.

LED Matrix Clock

An ESP32 keeps a MAX7219 LED matrix showing internet-synced time via NTP. A glowing wall clock with zero drift.

AQI Monitor

MQ135, MQ7, and a PM2.5 sensor feed an ESP32 air-quality dashboard built with Flask. Know exactly what you are breathing.

Student Manager

An ESP32 with OLED, LittleFS, and JSON stores and manages student records. Databases on a microcontroller.

OTA Firmware Update

Push new firmware to a Pico 2W over the air straight from GitHub. Update devices without touching them.

Day 62Smart Home

Indoor Security System

PIR motion plus a 4x4 keypad arm and disarm an ESP32 alarm reporting to Favoriot IoT. A complete DIY security panel.

BLE LED Control

Switch an LED from your phone over Bluetooth Low Energy on the ESP32. Modern BLE in MicroPython.

AI GPIO Controller

Ask an AI in Telegram to flip ESP32 GPIO pins via Groq. Natural-language hardware control.

MicroPython Watch

A XIAO ESP32-S3 with OLED shows time and OpenWeatherMap data on your wrist. Build your own smartwatch face.

IoT Web Dashboard

A reusable web dashboard template for Pico 2W and ESP32 sensor projects. Your sensor data, beautifully served.

Heart Rate Monitor

A pulse sensor on the ESP32 plots your heartbeat on an OLED. Biomedical sensing made approachable.

Joystick Servo

Steer an SG90 servo with a joystick module on the Pico 2W. Analog input to smooth motion.

Joystick Display

A KY-023 joystick's direction renders live on an SSD1306 OLED with the Pico 2. Visualize analog sticks in pixels.

Day 70Smart Home

Entry Exit Counter

Two IR sensors count people entering and exiting, with Telegram alerts on the ESP32. Bidirectional foot-traffic sensing.

Wi-Fi Robot Car

Drive a 4WD robot chassis from your phone over Wi-Fi with dual L298N drivers on the ESP32. Your first Wi-Fi rover.

Day 72Smart Home

RFID Access Control

Tap an RFID card to unlock — an ESP8266 with MFRC522 grants or denies access. Keycards, DIY style.

Day 73Smart Home

RFID Attendance Logger

An ESP32 logs RFID taps straight into Google Sheets. Attendance tracking with zero paperwork.

Day 74Smart Home

RFID Relay Control

An RFID card switches a relay and fan on the Pico 2 via MFRC522. Tap-to-power automation.

ESP-NOW RFID Display

One ESP8266 scans RFID cards while another shows results on an OLED over ESP-NOW. Split sensing and display wirelessly.

ESP-NOW Dual Sensor Link

Two ESP8266 nodes exchange DHT11 readings bidirectionally over ESP-NOW, each with its own display. True peer-to-peer sensing.

Battery Monitor

Watch a 18650 cell's voltage through a divider on the ESP8266, reported to Blynk. Never guess battery level again.

Smart Energy Meter

A ZMPT101B and ACS712 let the ESP32 meter voltage and current, analyzed in Blynk and MATLAB. See your home's power draw live.

Round Display Smartwatch

A circular GC9A01 display on the XIAO ESP32-S3 shows time and weather from NTP and OpenWeatherMap. Round-screen wearable chic.

NeoPixel Web Controller

Paint a WS2812B 8-LED ring from any browser via the Pico 2W. Addressable color, wirelessly.

Gesture LED Control

Wave your fingers — OpenCV tracks gestures and toggles LEDs on the XIAO ESP32-S3. Camera vision meets embedded control.

Flame Alert Servo

A flame sensor triggers an SG90 servo alarm on the ESP32. Fire detection with a physical response.

Adafruit IO LED Control

Toggle an LED from Adafruit IO's cloud dashboard over MQTT on the Pico 2W. Classic MQTT pub-sub in action.

PicoDesk Dashboard

A Pico 2W desk gadget showing weather and stats on an SSD1306 OLED. Your desk's tiny information radiator.

Node-RED Virtual LED

A Node-RED dashboard flips a virtual LED over MQTT with Mosquitto in Docker on the Pico 2W. Flow-based IoT without code.

MQTT Joystick Controller

A joystick publishes MQTT messages visualized on a Node-RED dashboard. Real-time control streams, wired or wireless.

Node-RED Relay Control

Switch relays from Node-RED flows over MQTT on the Pico 2W. Industrial-style control logic, drag-and-drop.

Node-RED NeoPixel Control

Drive NeoPixel colors from Node-RED dashboard widgets over MQTT. Lighting scenes as flowcharts.

MQTT Clock Display

An LCD on the Pico W shows date and time synced over MQTT. Clocks that listen to the network.

MQTT Servo Controller

Position a servo from MQTT messages on the Pico W. Message-driven motion.

MQTT Weather Dashboard

DHT11 readings travel over MQTT into a Node-RED dashboard, optionally via Oracle Cloud. Full pipeline from sensor to cloud chart.

Day 92Smart Home

Adafruit IO Smart Home

An ESP32 runs DHT22 sensing plus four relays, all orchestrated through Adafruit IO. A whole smart home on one dashboard.

NTP LCD Clock

Internet-synced time on an I2C LCD with the ESP32. Accurate clocks without extra hardware.

GPS Clock Display

A NEO-6M GPS module gives the Pico W atomic-accurate time plus location on OLED. Time from satellites.

PicoSense Dashboard

DHT11 data flows over MQTT into a Streamlit dashboard from the Pico 2W. Python-powered analytics for your sensor.

Joke Fetcher

An ESP32 pulls a fresh joke from the JokeAPI over HTTP. REST APIs on a microcontroller, with punchlines.

Day 97Smart Home

PIR Parking Assistant

A PIR sensor watches your parking spot and shows status on an OLED with the ESP32. Know if your space is taken.

Cloud NeoPixel Control

Control ESP32 NeoPixels from a Node-RED dashboard hosted on AWS EC2 over MQTT. Your lights, commanded from the cloud.

Day 99Smart Home

Cloud Smart Irrigation

AWS-hosted Node-RED waters plants based on DHT22 and soil data from the ESP32. Irrigation with a cloud brain.

Day 100Wireless

ShrikeFi ESP-NOW Control

Toggle LEDs wirelessly on the ShrikeFi ESP32-S3 board via ESP-NOW with OLED status. Next-gen dev board, classic protocol.

Projects by Kritish Mohapatra — each card links to the original project folder on GitHub. Descriptions are our own summaries.