Node Web Sockets Server for Arduino

Server Setup

Clone this repo onto your local machine

Test locally

• npm install
• npm start

You can test the socket connection using a cli tool or Insomnia

npm install -g wscat
wscat -c ws://localhost:3000

# Then send messages:
{"type":"buttonPress"}
{"type":"brightness","value":200}

Deploy on Render

Basic node server. This server handles the socket connections. It broadcasts to the clients any messages it receives. The same server works for both examples.

Arduino Setup

• Code tested for the Arduino Nano IOT
• Build the Circuit
• Test the circuit using the sketch found in circuit-tester folder
• The examples a wifi connection to connect to the web server. Use the sketch in wifi-tester to test your connections

Example 1 - Turn on the Lights

• A button press on an connected arduino will instantly update the button state on the server.
• This example has no frontend controls, the arduino communicate to each other through a central server.

Example 2 - Dim, Pulse, and Turn

• This example builds off the previous one. The button still controls the blue led state.
• There is a frontend dashboard with three sliders for brightness, pulse speed, and servo position
• Moving the sliders will control the lights and motor on the Servo.

Note: servo motor should connect red to the Vin pin to get a power boost. This is sort of a hack but works. Black cable to ground. Data cable should connect to D6

Live Dashboard

A Challenge

• Combine the two sketches!
• Connect a force sensor to the Arduino
• Write a p5 sketch the uses the force the change the size of the circle.
  • The higher the force the smaller the circle.

*Hint - You'll either have to change and deploy your own server or highjack one of my value, like brightness

added this from the branch