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Published April 9, 2024 © GPL3+

How to Control LED from Internet using Raspberry Pi Pico W

In this step by step tutorial on how to control LED from Internet we will control from dweet. io website, which is free and very easy to do.

IntermediateProtip2 hours557

How to Control LED from Internet using Raspberry Pi Pico W

Things used in this project

Hardware components

Raspberry Pi Pico W

Micro-USB to USB Cable (Generic)

LED (generic)

Resistor 475 ohm

It can be 1000 ohm also

Male/Male Jumper Wires

Software apps and online services

Thonny IDE

Story

The Raspberry Pi Pico W, a microcontroller with built-in Wi-Fi, opens a plethora of possibilities for IoT projects, including the ability to control devices from anywhere in the world. In this tutorial, we will learn how to control an LED over the internet using a Raspberry Pi Pico W and dweet.io.

You can check out this video for more clarity on how we are going to do.

Let's complete how to control LED from Internet step by step:

Step 1: Setting Up the Hardware

Connect the LED to the Raspberry Pi Pico W: Insert the LED into the breadboard. Connect the long leg (anode) of the LED to GPIO 0 of the Pico W through a 220-ohm resistor. Then, connect the short leg (cathode) directly to one of the ground (GND) pins on the Pico W.
Power Up: Connect your Raspberry Pi Pico W to your computer using a Micro USB cable. The device should power up immediately.

Step 2: Installing MicroPython

To control the Pico W from the internet, we'll use MicroPython, a lean and efficient version of Python designed for microcontrollers.

Download the latest MicroPython firmware for the Raspberry Pi Pico W from the official website.
Install the firmware using the Thonny IDE. Go to Tools > Options > Interpreter, select MicroPython (Raspberry Pi Pico), and follow the prompts to install the firmware. Checkout this Getting Started Guide: How To Get Started with Raspberry Pi Pico

Step 3: Create Thing on DWEET.IO

Go to dweet.io website and click on Play
Click on create a dweet for a thing
Provide the thing name as "led_control"
In the content provide

{ "value" : 1 } - To turn the LED ON

Click on Try it out

Step 4: Grab the thing URL from DWEET.IO

Click on GET request
Provide the created thing name in the parameter "led_control"
Click on Try it out!
Grab the request URL https://dweet.io:443/get/latest/dweet/for/led_control

Above URL you need replace in code if it's changed

Step 5: Grab the Code and Run

Download the sketch/code remote_controlled_led.py
Open Thonny IDE and open the downloaded code
Provide your SSID and PASSWORD in code
Check if request URL for the thing is the same which you copied
Run the application
LED should be turned on as Value = 1 we have set
Change the value on dweet.io e.g. "value" : 0 to turn off

If I have provided a real value for you, consider buying me a coffee☕

Conclusion

You've now set up a basic but powerful IoT application with the Raspberry Pi Pico W. This project can be the starting point for more complex applications, such as home automation systems, remote monitoring, and more.

Code

remote_controlled_led.py

import network
import sys
import time
import requests
import json
from machine import Pin

wlan = network.WLAN(network.STA_IF)
led = Pin(0, Pin.OUT)

def connect_to_wifi():
    wlan.active(True)
    for _ in range(10):
        if not wlan.isconnected():
            print("Connecting to the network...")
            wlan.connect("YOUR_SSID", "YOUR_PASSWORD") # Make sure to provide your WiFi credentials here
            time.sleep(2)
            
        if not wlan.isconnected():
            print("Cannot connect to the WiFi, please check your credentials")
            sys.exit(0)
    print("Connected to IP: ", wlan.ifconfig()[0])
    


def call_api():
    if wlan.isconnected() == True :
        response = requests.get("https://dweet.io:443/get/latest/dweet/for/led_control")
        data = json.loads(response.content)
        led_command = data["with"][0]["content"]["value"]
        print(led_command)
        led.value(led_command)
        
connect_to_wifi()
call_api()

while True:
    if wlan.isconnected() == True:
        call_api()
    else:
        print("Something went wrong, please try again")
        sys.exit(0)
    time.sleep(1)

Credits

RajivCodeLab

7 projects • 4 followers

Creates YT videos on DIY IoT Projects: Raspberry Pi Pico, Raspberry Pi Zero, Arduino, ESP32,

Contact

Rajiv Sharma

18 projects • 71 followers

Having more than 10 years of experience in IoT and software technology. Founded IoTBoys to share knowledge with IoT enthusiasts.

Contact

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How to Control LED from Internet using Raspberry Pi Pico W