How it works

•

•

•

Published June 15, 2023 © CC BY

Haikyu Shutter

An automatic shutter controlled according to brightness and temperature, for greater comfort and energy savings. It works with LoRa techno

IntermediateWork in progress6 hours118

Things used in this project

Hardware components

Arduino MKR WAN 1300

Adafruit Waterproof DS18B20 Digital temperature sensor

DHT11 Temperature & Humidity Sensor (3 pins)

LED, Blue

5 mm LED: Yellow

DC Motor, 12 V

UDOO 2AA Battery Holder for RTC

DFRobot Analog Ambient Light Sensor For Arduino

Breadboard (generic)

Resistor 1k ohm

Resistor 220 ohm

Dual DC Motor Driver

Generic 9V DC supply

Seeed Studio Grove - Relay

Software apps and online services

The Things Industries The Things Stack

Node-RED

Arduino IDE

Hand tools and fabrication machines

Laser cutter (generic)

3D Printer (generic)

Drill / Driver, Cordless

Multitool, Screwdriver

Story

What is it?

An automatic shutter controlled according to brightness and temperature, for greater comfort and energy savings.

The advantage of this shutter is its connectivity. Unlike other shutters, it doesn't require an Internet connection to operate. Using LoRa technology, it can operate even in the most unfavorable conditions, such as white zones.

The Haikyu-Box and his shutter

How it works ?

Here, we're using an Arduino MKRWAN 1300 including a LoRa antenna and light and temperature sensors (one each for indoor and outdoor use).

These sensors are connected to the Arduino so that it can process the information. Then, the Arduino is connected to TheThingsNetwork platform in LoRa to retrieve the information transmitted by the Arduino.

Finally, the data collected by TheThingsNetwork is sent via MQTT to a Node-Red server. This server enables us to create a dashboard to visualize the information collected on a web application. It also sends the desired parameters back to the Arduino, via TheThingsNetwork and the LoRa network.

As the Arduino and its LoRa modem are energy-efficient, the box runs on two AA batteries, enough to last a few years without changing.

Concretely, what does it do?

In concrete terms, this connected shutter reduces energy consumption and increases comfort by adjusting shutter opening according to light conditions and outside temperature.

It also features a relay that can be used to control a lamp, for example, if indoor lighting conditions are too dim.

Thanks to the web application, you can monitor ambient temperature and brightness values. You can also set shutter opening conditions to suit your personal preferences.

The shutter opens in stages for optimum adjustment to indoor brightness and temperature.

Monitoring of the brightness and temperatures

Settings of the shutter

Schematics

Code

Arduino Main Code

#include <MKRWAN_v2.h>
#include "DHT.h"
#include <OneWire.h>
#include <DS18B20.h>
#include "ArduinoJson.h"

#define DHTPIN 2
#define DHTTYPE DHT11
#define ONE_WIRE_BUS 0

StaticJsonDocument<256> doc;
OneWire oneWire(ONE_WIRE_BUS);
DS18B20 sensor(&oneWire);
volatile byte state = LOW;
int position=0;
int envoie=15;

uint32_t start, stop;

LoRaModem modem;
String appEui = "00:00:00:00:00:00:00:00";
String appKey = "F2:AF:2C:C0:5E:59:9C:52:E8:23:46:78:C9:99:F2:1E";
DHT dht(DHTPIN, DHTTYPE);

void monter(){
  digitalWrite(18,HIGH);
  for (int h=0;h<110;h++){

  analogWrite(1,h);
  delay(5);
}
}

void stoppy(){
  analogWrite(18,0);
  analogWrite(1,0);
  delay(1000);
}


void descendre(){
  digitalWrite(1,LOW);
  for (int i=0;i<110;i++){

  analogWrite(18,i);
  delay(5);
}
}

void setup() {
  
  Serial.begin(115200);
  Serial.println("Booting...");
  modem.begin(EU868);
  
  //def entrées
  pinMode(4, INPUT);
  pinMode(5, INPUT);
  pinMode(A1, INPUT);
  pinMode(A2, INPUT);

  //def sorties
  pinMode(1, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(6, OUTPUT);
  digitalWrite(6,HIGH);

  //calibration volet
  descendre();
  delay(500);
  stoppy();

  //setup des capteurs temp
  dht.begin();
  sensor.begin();
  sensor.setResolution(12);

  //setup modem
  int connected;
  int err;
  connected = modem.joinOTAA(appEui, appKey);
  modem.minPollInterval(30);
  modem.setPort(1);
  delay(5000);
  digitalWrite(6,LOW);
  
}

void loop() {

  float hin = dht.readHumidity();
  float tin = dht.readTemperature();
  sensor.requestTemperatures();
  float tout = sensor.getTempC();
  int test1=analogRead(A1)*100;
  int taux_lum1 = test1/1023;

  int sensorValue2 = analogRead(A2);
  float voltage2 = sensorValue2 * (5 / 1024.0);
  int taux_lum2 = 100-(voltage2*20);

  //control_lume alluage lampe intérieur
  if(taux_lum2<35){
    digitalWrite(3,HIGH);
  }
  else{
    digitalWrite(3,LOW);
  }
  control_lum(taux_lum1,taux_lum2);

  Serial.print("Humidite interieure: ");
  Serial.print(hin);
  Serial.print(" %\n");
  Serial.print("Temperature interieure: ");
  Serial.print(tin);
  Serial.print(" *C ");
  Serial.print(" %\n");
  Serial.print("Temperature exterieure: ");
  Serial.print(tout);
  Serial.print(" *C ");
  Serial.print(" %\n");
  Serial.print("lumière ext :");
  Serial.println(taux_lum1);
  Serial.print("lumière int :");
  Serial.println(taux_lum2);
  
  
  //envoie des infos vers TTN/Node-Red
  if(envoie==15){
  digitalWrite(6,HIGH);
  Serial.println("Sending packet...");
  modem.beginPacket();
  modem.print(tin);
  modem.print(",");
  modem.print(tout);
  modem.print(",");
  modem.print(taux_lum1);
  modem.print(",");
  modem.print(taux_lum2);

  int err = modem.endPacket(true);
  Serial.println("Packet send");
  if(err){
    Serial.println("Succès");
  }
  digitalWrite(6,LOW);
  envoie=0;
  }
  
  if (!modem.available()) {
    Serial.println("No downlink message received at this time.");
  }
  
  //Réception infos depuis Node-Red
  char rcv[64];
  int q = 0;
  while (modem.available()) {
    rcv[q++] = (char)modem.read();
  }
  Serial.print("Received: ");
  for (unsigned int h = 0; h < q; h++) {
    Serial.print(rcv[h] >> 4, HEX);
    Serial.print(rcv[h] & 0xF, HEX);
    Serial.print(" ");
  }
  Serial.println();

  delay(2000);
  envoie++;
}


void control_temp(int var1, int var2){
  if(((var1-var2)>2)||((var1-var2)<-2)){
  if(var1<var2){
    if(position>0){
        descendre();
        delay(100);
        stoppy();
        position--;
        Serial.print("position");
        Serial.println(position);
    }
  }
  else{
    if(position<4){
      monter();
      delay(100);
      stoppy();
      position++;
      Serial.print("position");
      Serial.println(position);
    }
  }
  }
}

void control_lum(int var1, int var2){
  if(((var1-var2)>20)||((var1-var2)<-20)){
  if(var1<var2){
    if(position>0){
        descendre();
        delay(100);
        stoppy();
        position--;
        Serial.print("position");
        Serial.println(position);
    }
  }
  else{
    if(position<4){
      monter();
      delay(100);
      stoppy();
      position++;
      Serial.print("position");
      Serial.println(position);
    }
  }
  }
}