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Smart Light¶

In this project, we use Blynk’s Silder to control the brightness of the LED, turning it on and off with Switch.

Note

Before starting this project, we recommend that you complete Get Start with Blynk. The following will give you a clear understanding of Blynk.

Required Components

In this project, we need the following components.

It’s definitely convenient to buy a whole kit, here’s the link:

Name

ITEMS IN THIS KIT

LINK

Raphael Kit

337

Raphael Kit

You can also buy them separately from the links below.

COMPONENT INTRODUCTION

PURCHASE LINK

GPIO Extension Board

BUY

Breadboard

BUY

Jumper Wires

BUY

Resistor

BUY

LED

BUY

1. Wiring

../../_images/wiring_led1.png

2. Create Widget and Datastream

  1. Click on the menu icon in the upper right corner and select edit dashboard.

    ../../_images/sp220913_180231.png

  2. Add a Switch widget and a Slider widget to the Dashboard.

    ../../_images/sp220914_160427.png

  3. Create a Datastream for the Switch widget (I used V3). It will be used to control the turning on and off of the LED.

    ../../_images/sp220914_155911.png

  4. Create a Datastream for the Slider widget (I used V2), its value range is 0 to 100, it will be used to control the brightness of the LED.

    ../../_images/sp220914_160234.png

  5. When finished, click Save And Apply at the top right.

    ../../_images/sp220913_182300.png

3. Run the Code

  1. Edit the code

cd ~/blynk-raspberrypi-python
sudo nano blynk_light.py

  1. Find the line below and past your BLYNK_AUTH_TOKEN.

BLYNK_AUTH = 'YourAuthToken'

  1. Run the code.

sudo python3 blynk_light.py

  1. Go to Blynk, operate widget on Dashboard. now you click switch widget will turn on/off LED. slide Slider widget will change LED brightness.

  2. If you want to use Blynk on mobile devices, please refer to How to use Blynk on mobile device?.