• Moving to the protoboard

    Pero12/05/2017 at 18:14 0 comments

    I am not really a fan of breadboards, but for a design so trviail I really didn't feel like spending time and money to produce PCB. I hooked up everything on my desk and got it running in no time. The whole thing should be enclosed anyways, so it doesn't matter if it's ugly or not.

    I also did some power optimization. Instead of linear regulator I got $0.80 MP1484 step down module from e-bay. I felt kinda terrible to allow 12-5=7V drop across the poor component. With current bursts of up to 500mA, I can only imagine how short the linreg would survive.

  • Code

    Pero11/21/2017 at 22:45 0 comments

    Complete code so far:

    // Adafruit IO Digital Output Example
    // Tutorial Link: https://learn.adafruit.com/adafruit-io-basics-digital-output
    // Adafruit invests time and resources providing this open source code.
    // Please support Adafruit and open source hardware by purchasing
    // products from Adafruit!
    // Written by Todd Treece for Adafruit Industries
    // Copyright (c) 2016 Adafruit Industries
    // Licensed under the MIT license.
    // All text above must be included in any redistribution.
    /************************** Configuration ***********************************/
    // edit the config.h tab and enter your Adafruit IO credentials
    // and any additional configuration needed for WiFi, cellular,
    // or ethernet clients.
    #include "config.h"
    /************************ Example Starts Here *******************************/
    // digital pin 5
    #define LED_PIN 0
    #define ventilator 5
    // set up the 'digital' feed
    AdafruitIO_Feed *digital = io.feed("xxxxx");
    AdafruitIO_Feed *state = io.feed("yyyyy");
    void setup() {
      // set led pin as a digital output
      pinMode(LED_PIN, OUTPUT);
      pinMode(ventilator, OUTPUT);
      // connect to io.adafruit.com
      // set up a message handler for the 'digital' feed.
      // the handleMessage function (defined below)
      // will be called whenever a message is
      // received from adafruit io.
      // wait for a connection
      while (io.status() < AIO_CONNECTED) {
       digitalWrite(LED_PIN, LOW);  // toggle LED during connecting phase
       digitalWrite(LED_PIN, HIGH);
      // we are connected
       digitalWrite(LED_PIN, LOW);
       digitalWrite(LED_PIN, HIGH);
    void loop() {
      // io.run(); is required for all sketches.
      // it should always be present at the top of your loop
      // function. it keeps the client connected to
      // io.adafruit.com, and processes any incoming data.
    // this function is called whenever an 'digital' feed message
    // is received from Adafruit IO. it was attached to
    // the 'digital' feed in the setup() function above.
    void handleMessage(AdafruitIO_Data *data) {
      // write the current state to the led
      digitalWrite(ventilator, data->toPinLevel());