websockets-arduino

Experiments using arduino and websockets

List of experiments

• Lighting a LED via websocket event
• Reading proximity values from HCSR-04 sensor and triggering a server-sent websocket event
• Remotely triggering a pin from a websocket event done by the client
• Read KY-038 sound values using Sensor.Digital
• (non-arduino related) - connecting to a Joy-Con controller and triggering the rumble

Running an experiment

Example running ledtest.js

npm i

node ledtest.js

Connect to ws://localhost:3000, and send:

{
    "led": "on"
}

Windows problems

• Install Python and Visual Studio (with C++ libs)
• Install node-gyp - npm install -g node-gyp
• Install serialport - npm install serialport

See also

• [https://www.instructables.com/Javascript-robotics-and-browser-based-Arduino-cont/]
• [https://www.makeuseof.com/tag/control-arduino-using-javascript/]
• [https://github.com/rwaldron/johnny-five/blob/main/docs/proximity-hcsr04.md]
• [https://www.geeksforgeeks.org/how-to-open-web-cam-in-javascript/]
• [https://www.tutorialspoint.com/arduino/arduino_dc_motor.htm]
• [https://developer.mozilla.org/en-US/docs/Web/API/WebSocket/message_event]
• [https://github.com/rwaldron/johnny-five/blob/main/docs/sensor.md]
• [https://github.com/tomayac/joy-con-webhid]