Jens Chr Brynildsen jenschr

Freelance developer focused on hardware and entertainment. Resides @bitraf

jenschr / dweetio.ino

Last active March 1, 2024 08:04

Basic code for setting a Dweet with a GET request on an ESP32

	#include <WiFi.h>
	/*
	* Basic code for setting a Dweet with a GET request on an ESP32
	*
	* Original by Liz Miller (www.learnrobotics.org)
	* Updated for ESP32 by https://gist.github.com/jenschr
	*/

	// WiFi parameters
	const char* ssid = "your-ssid"; // Replace with your ssid

jenschr / AWS Camera test

Last active November 9, 2021 10:19

jenschr / Subscriber.js

Created November 2, 2021 14:41

	import React from 'react';

	import { useSubscription } from 'mqtt-react-hooks';

	export default function Subscriber() {
	/* Message structure:
	* topic: string
	* message: string
	*/
	const { message } = useSubscription([

jenschr / Status.js

Created November 2, 2021 14:37

	import React from 'react';

	import { useMqttState } from 'mqtt-react-hooks';

	export default function Status() {
	/*
	* Status list
	* - Offline
	* - Connected
	* - Reconnecting

jenschr / index.html

Created November 2, 2021 13:43

	<!DOCTYPE html>
	<html>
	<head>
	<title>Socket.IO chat</title>
	<style>
	body { margin: 0; padding-bottom: 3rem; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }

	#form { background: rgba(0, 0, 0, 0.15); padding: 0.25rem; position: fixed; bottom: 0; left: 0; right: 0; display: flex; height: 3rem; box-sizing: border-box; backdrop-filter: blur(10px); }
	#input { border: none; padding: 0 1rem; flex-grow: 1; border-radius: 2rem; margin: 0.25rem; }
	#input:focus { outline: none; }

jenschr / index.js

Created November 2, 2021 13:39

Chat example

	const express = require('express');
	const app = express();
	const http = require('http');
	const server = http.createServer(app);
	const { Server } = require("socket.io");
	const io = new Server(server);

	app.get('/', (req, res) => {
	res.sendFile(__dirname + '/index.html');
	});

jenschr / App.js

Created November 2, 2021 11:52

Simple example showing how to add MQTT to your React app

	import logo from './logo.svg';
	import './App.css';

	import { Connector } from 'mqtt-react-hooks';
	import Status from './Status';

	const mqttOptions = {
	username: 'username',
	password: 'password', // Passwords are buffers
	}

jenschr / index.js

Created November 2, 2021 10:09

MQTTJS example bridge from https://github.com/mcqn/mqtt-socketio-bridge

	// mqtt-socketio-bridge
	//
	// (c) Copyright 2018 MCQN Ltd
	//

	var mqtt = require('mqtt')
	var express = require('express')
	var app = express()
	var http = require('http').Server(app)
	var io = require('socket.io')(http)

jenschr / RS485_simple.ino

Last active October 26, 2021 14:17

RS485 simple

	#include <SoftwareSerial.h>

	const byte receivePin = 8; // green cable (RO)
	const byte transmitPin = 9; // orange cable (DI)
	const byte receiveEnablePin = 2; // blue cable (RE)

	const byte RECEIVER_ENABLED = 0;
	const byte RECEIVER_DISABLED = 1;

	const byte LED_PIN = 13;

jenschr / Knock.ino

Created October 22, 2021 12:07