Published October 25, 2022 © TAPR-OHL

Sleep Environment Monitor

A sleep environment detector can be designed to give people feedback whether the current environment is suitable for sleeping

BeginnerFull instructions provided8 hours436

Things used in this project

Hardware components

Seeed Studio SGP30

Seeed Studio DHT11

Seeed Studio Wio Terminal

Software apps and online services

Arduino IDE

Story

Sleep environment monitor

Sleep will have a great impact on people's work, life and health. The sleep condition of contemporary people will always have more or less problems. One of the important factors affecting sleep is sleep environment, among which the more important indicators are air temperature and humidity, carbon dioxide concentration, noise. Therefore, a sleep environment detector can be designed to give people feedback whether the current environment is suitable for sleeping by measuring air temperature and humidity, carbon dioxide concentration and noise value.

Selection of materials：

①Grove - VOC and eCO2 Gas Sensor (SGP30)

②Grove - Temperature & Humidity Sensor V2.0 (DHT20)

③Wio Terminal

Feasibility assessment：

Wio Terminal Built-in highly integrated design, LCD screen and compact shell, connect to Grove ecosystem, low deployment cost and difficulty, support Arduino IDE software platform, equipped with a powerful wiki library, suitable for small white people without code base to get started quickly, high feasibility.

1.Device selection and material collection

Participant：Chunqiong Qiu

Materials：

①Grove - VOC and eCO2 Gas Sensor (SGP30)

②Grove - Temperature & Humidity Sensor V2.0 (DHT11)

③Wio Terminal

2.Deploy Code&Test

Participant:Lucy Lu/Chunqiong Qiu/Jiachun Cheng

Process：

Step1:Finish the connected between wio ternimal and sensor

Step2:Download code from wiki and translate into machine language

Step3:Time after time test to get what we want

①Give stand data（Sound＜500，24℃<Temperature＜28℃，40%<humidity＜70%,，CO2＜700ppm），shows suit for sleep

②Give abnormal data（Sound≥500 ，Temperature≥28℃ or≤24℃， Humidity≥70%or≤40%，CO2≥700ppm），shows unsuitable

Step4:put the detector in different environments

3. Code correctness

Participant：Jiachun Cheng

Optimize the code to improve the readability of the code

4. Writing project report

Participant：Chunqiong Qiu

5.Translate reprot and edit on the Hackster

Participant：Lucy lu

Sleep Environment Monitor

#include <Arduino.h>
#include "sensirion_common.h"
#include "sgp30.h"
#include "DHT.h"
#include"TFT_eSPI.h"
TFT_eSPI tft;
TFT_eSprite spr = TFT_eSprite(&tft);
#define DHTTYPE DHT11   
#define DHTPIN A0     
DHT dht(DHTPIN, DHTTYPE);
void setup() 
{                              
    tft.begin();            
    tft.setRotation(3);     
    digitalWrite(LCD_BACKLIGHT, HIGH); 
    Wire.begin();   
    dht.begin();    
    pinMode(WIO_MIC, INPUT); 
    Serial.begin(115200);  
    Serial.println("serial start!!"); 
    while (sgp_probe() != STATUS_OK) 
    { 
     Serial.println("SGP failed");
    while (1);
    }
    sgp_set_absolute_humidity(13000);
    sgp_iaq_init();
}
void loop() 
{                                   
    float temp_hum_val[2] = {0};  
    u16 tvoc_ppb, co2_eq_ppm;  
    s16 err = 0;
    err = sgp_measure_iaq_blocking_read(&tvoc_ppb, &co2_eq_ppm);
    if (err == STATUS_OK) 
    {
      Serial.print("tVOC  Concentration:");
      Serial.println("ppb");
      Serial.print("CO2eq Concentration:");
      Serial.print(co2_eq_ppm);
      Serial.println("ppm");
    } else {
      Serial.println("error reading IAQ values\n");
    }
    if (!dht.readTempAndHumidity(temp_hum_val)) 
    {
      Serial.print("Humidity: ");
      Serial.print(temp_hum_val[0]);    
      Serial.print(" %\t");
      Serial.print("Temperature: ");
      Serial.print(temp_hum_val[1]);    
      Serial.println(" *C");
    } else 
    {
      Serial.println("Failed to get temprature and humidity value.");
    }
    int val = analogRead(WIO_MIC);
    Serial.print("Sound: ");
    Serial.println(val);
    if ((temp_hum_val[1] > 24&&temp_hum_val[1]<28)&&(temp_hum_val[0]>40&&temp_hum_val[0]<70)&&(co2_eq_ppm<700)&&(val<500)) 
    {
      tft.fillScreen(0x0);
      tft.fillRect(0, 0, 320, 50, TFT_BLUE);
      tft.setTextSize(2);
      tft.setTextColor(TFT_GREEN); 
      tft.drawString((String)"(-^O^-) suit for sleep", 30, 20);  
     }
     else 
     {
      tft.fillScreen(0x0);
      tft.fillRect(0, 0, 320, 50, TFT_BLUE);
      tft.setTextSize(2);
      tft.setTextColor(TFT_RED);
      tft.drawString((String)"(-^-) Unsuitable", 60, 20);
     }
     tft.setTextSize(2);
     tft.setTextColor(TFT_WHITE);
     tft.drawString("Sound: ", 30, 70);
     tft.drawNumber(val, 140, 60, 2);
     tft.setTextSize(2);
     tft.setTextColor(TFT_WHITE);
     tft.drawString("Temp: ", 30, 110);
     tft.drawNumber(temp_hum_val[1], 140, 100, 2);
     tft.drawString("Humi: ", 30, 150); 
     tft.drawNumber(temp_hum_val[0], 140, 140, 2);
     tft.drawString("CO2: ", 30, 190); 
     tft.drawNumber(co2_eq_ppm, 140, 180, 2);
     spr.pushSprite(0, 0);
     spr.deleteSprite();
     delay(1500); 
}