#ardiuno

Disclaimer: This post is not a paid promotion and is not intended to influence the choice of one programming language over another. The intent is solely to add value to the engineering and maker community by sharing author’s personal understanding and practical experience with these tools. In the IoT world, Python is often the “default” for hobbyists. However, if you are coming from a scientific…

IR remote control for the home – part 3

In the previous two posts, we set up an ESP32 development board with an IR receiver to read codes sent by a remote control. Now it’s time to add MQTT capability.

I chose the PubSubClient library – available in the Arduino IDE library manager – because it claims compatibility with the ESP32. When I looked closer, it turns out that the degree of support for the ESP32 is, shall we say, disputed. But…

Petits robots à fabriquer, 13 projets D.I.Y.

J’ai reçu des éditions EYROLLES le livre « Petits robots à fabriquer » dans la collection « serial makers ».

résumé du livre : Vous avez toujours rêvé de pouvoir fabriquer un robot qui puisse se déplacer et répondre à vos ordres ? Ce livre très accessible exaucera votre souhait et bien plus encore, grâce à ces 13 projets de robots à monter à l’aide de composants électroniques courants et d’objets…

Synesthesia lights up Mini Maker Faire Bangalore

A thousand two hundred meters of tubing, sixty kilos of steel, six hundred LEDs, five ultrasonic sensors, 2 coats of paint, one coat of primer, over a 100 nuts and bolts, and this was just the installation. Plus fifty-four square meters of black rexine to enclose this little light monster.

The build was crazy. 7 days. Help arrived magically. Almost sequenced. Thanks Gopi, Arnab, Chetan (for the…

So this code is the one that connects the Joystick with the board, 

we use the analog inputs as a trace of the motion of the x and y

Note, the joystick is considered two potentiometers, made of two resistors.

Need to find the data sheet of the joystick. 

/* Read Jostick  * ------------  *  * Reads two analog pins that are supposed to be  * connected to a jostick made of two potentiometers  *  * We send three bytes back to the comp: one header and two  * with data as signed bytes, this will take the form:  *     Jxy\r\n  *  * x and y are integers and sent in ASCII  *  * http://www.0j0.org | http://arduino.berlios.de  * copyleft 2005 DojoDave for DojoCorp  */

int ledPin = 13; int joyPin1 = 0;                 // slider variable connecetd to analog pin 0 int joyPin2 = 1;                 // slider variable connecetd to analog pin 1 int value1 = 0;                  // variable to read the value from the analog pin 0 int value2 = 0;                  // variable to read the value from the analog pin 1

void setup() {  pinMode(ledPin, OUTPUT);              // initializes digital pins 0 to 7 as outputs  Serial.begin(9600); }

int treatValue(int data) {  return (data * 9 / 1024) + 48; }

void loop() {  // reads the value of the variable resistor  value1 = analogRead(joyPin1);    // this small pause is needed between reading  // analog pins, otherwise we get the same value twice  delay(100);              // reads the value of the variable resistor  value2 = analogRead(joyPin2);