IoT with MicroPython & Raspberry Pi Pico W

Learn to implement digital outputs on the Raspberry Pi Pico W by wiring an led in a circuit with a resistor and writing micropython code to blink it.

Understand transistor switching as a switch for the Raspberry Pi Pico W, using an NPN transistor or MOSFET to drive 12 V loads with base current limits.

Learn to interface a relay with a Raspberry Pi Pico W, driven by its 3.3v output, to switch an ac device using a transistor and a freewheeling diode.

Learn to interface a push button with the Raspberry Pi Pico W by reading a digital input, using pull-up or pull-down resistors (including internal options) to prevent floating pins.

Interface two switches to the Raspberry Pi Pico W with internal pull-ups to run MicroPython, turn an LED on and off, print an up-down counter, with a 0.5 second debounce.

Learn to interface 24-volt industrial sensors with a Raspberry Pi Pico W using a PC817 optocoupler for isolated 3.3-volt input signals.

Generate pwm on Raspberry Pi Pico W using on-chip pwm modules to vary duty cycle for smooth voltage. Apply fading led and motor speed control tutorials.

Interface a dc motor with a Raspberry Pi Pico using an L298N high-current motor driver to control direction and speed via pwm, with a common ground.

Explore adc usage on raspberry pi pico (rp2040): three channels (0–2), 3.3 v reference, 12-bit resolution, and micropython read_u16 for millivolt readings.

Learn to use the Raspberry Pi Pico W's on-chip ADC to read an LDR via a simple potential divider, converting light to voltage, with a threshold for relay control.

Interface the LM35 temperature sensor with a Raspberry Pi Pico W, read its voltage via the ADC, convert to Celsius, and print the result.

Learn to interface a DHT22 temperature and humidity sensor with the Raspberry Pi Pico W using MicroPython, including pin wiring, pull-up resistor, and reading data with the DHT library.

Learn to interface the ds18b20 one-wire temperature sensor with Raspberry Pi Pico W using MicroPython, enabling multiple sensors on one bus and readings from -55 to 125°C.

Learn to interface the HC-SR04 ultrasonic sensor with Raspberry Pi Pico W using MicroPython, trigger the sensor, measure echo duration in microseconds, and compute distance from the speed of sound.

Learn the fundamentals of the internet of things, from sensors and data analytics to actions, across industrial and consumer applications, including home automation and Industry 4.0.

Explore IoT hardware options from microcontroller boards to single-board computers and industrial gateways, and learn when to use Wi-Fi, LAN, GSM, LoRa, Zigbee, Bluetooth, and edge computing.

Compare cloud options for IoT: use platform as a service for custom, flexible development, or software as a service for ready-made IoT platforms like adafruit.io and ThingSpeak.

Explore the background networking of IoT using Raspberry Pi Pico W and Micropython, covering direct and indirect internet connections, gateways, and key protocols like HTTP and MQTT.

Sign up for Thingspeak, verify email, and create a channel with temperature, humidity, and pressure fields. Use API keys and REST requests to post data from Raspberry Pi with MicroPython.

Sign up on ThingSpeak, create a new channel with temperature, humidity, and pressure fields, and learn to post data via write API keys using HTTP requests.

Connect the Raspberry Pi Pico W to Wi-Fi using MicroPython and the network library, configure SSID and password, and view IP configuration for IoT projects.

Learn to send temperature and humidity data from a Raspberry Pi Pico W to ThingSpeak with MicroPython, using Wi-Fi, API keys, and http requests to update channels.

Develop a home temperature and humidity monitor by interfacing a DHT22 with a MicroPython-enabled Raspberry Pi Pico W and publishing readings to Thingspeak.

Learn how to troubleshoot Thingspeak issues in Micropython on the Raspberry Pi Pico W by closing response objects to prevent memory errors and using LED blinks for debugging.

Discover MQTT, the fast, storage-free IoT protocol, where a broker routes data from publishers to subscribers via topics like temp and humidity.

Explore the MQTT protocol basics—brokers, authentication keys (64/128 bytes), and QoS levels 0, 1, and 2—with their trade-offs, and prep to publish from the Raspberry Pi Pico board.

Learn to set up the Adafruit IO IoT platform, compare free and paid plans, create feeds and dashboards, and build a home automation dashboard with temperature, humidity, and relay controls.

Publish sensor data from a Raspberry Pi Pico to an mqtt broker using micropython and Adafruit IO, including wifi connection, broker setup, and topic feeds like humidity and temp.

Learn how to subscribe to MQTT topics in MicroPython on a Raspberry Pi Pico W, decode topic messages, and trigger actions such as turning relays on or off.

Convert MQTT test and subscribe codes into a complete home automation project that displays temperature and humidity on the cloud and controls relays using a Raspberry Pi Pico W.

Learn to build an IoT plant watering sprinkler with a raspberry pi pico w and micropython, using blink cloud, a relay, and a water pump.

Demystify four stage IoT architecture, from sensors and embedded systems to gateways, cloud storage, and dashboards. Compare direct device-to-cloud, edge heavy, and gateway-driven local architectures for industrial and consumer use.