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en:iot-open:hardware2:sensors_environment [2023/11/21 21:33] – ktokarzen:iot-open:hardware2:sensors_environment [2024/05/27 12:07] (current) – ktokarz
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 ====== Environment Sensors ====== ====== Environment Sensors ======
 +{{:en:iot-open:czapka_b.png?50| General audience classification icon }}{{:en:iot-open:czapka_e.png?50| General audience classification icon }}\\
 == Temperature Sensor == == Temperature Sensor ==
 A temperature sensor is a device used to determine the temperature of the surrounding environment. Most temperature sensors work on the principle that the material's resistance changes depending on its temperature. The most common temperature sensors are: A temperature sensor is a device used to determine the temperature of the surrounding environment. Most temperature sensors work on the principle that the material's resistance changes depending on its temperature. The most common temperature sensors are:
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 <code c> <code c>
 #include <OneWire.h>           //library for 1-Wire protocol #include <OneWire.h>           //library for 1-Wire protocol
-#include <DallasTemperature.h> //library for Dallas DS18B20 digital thermometer+#include <DallasTemperature.h> //library for DS18B20 digital thermometer
  
-const int SENSOR_PIN = 13;     //DS18B20 pin+const int SENSOR_PIN = 13;   //DS18B20 pin
  
-OneWire oneWire(SENSOR_PIN);   //oneWire class+OneWire oneWire(SENSOR_PIN); //oneWire class
 DallasTemperature tempSensor(&oneWire);  DallasTemperature tempSensor(&oneWire); 
-                               //connect oneWire to DallasTemperature library+                             //connect oneWire to DallasTemperature library
  
-float tempCelsius;             //temperature in Celsius degrees+float tempCelsius;           //temperature in Celsius degrees
  
 void setup() void setup()
                    
 { {
-  Serial.begin(9600);          //initialize serial port +  Serial.begin(9600);        //initialize serial port 
-  tempSensor.begin();          //initialize DS18B20+  tempSensor.begin();        //initialize DS18B20
 } }
  
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 { {
   tempSensor.requestTemperatures();                tempSensor.requestTemperatures();             
-                               //command to read temperatures+                             //command to read temperatures
   tempCelsius = tempSensor.getTempCByIndex(0);     tempCelsius = tempSensor.getTempCByIndex(0);  
-                               //read temperature (in Celsius)+                             //read temperature (in Celsius)
  
   Serial.print("Temp: ");   Serial.print("Temp: ");
-  Serial.print(tempCelsius);   //print the temperature+  Serial.print(tempCelsius); //print the temperature
   Serial.println(" C");   Serial.println(" C");
  
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 </code> </code>
 +
 +<note>Digital temperature sensors using 1-Wire are handy when communication speed is not crucial. 1-Wire offers longer distance and less cabling compared, e.g. to I2C and SPI.</note>
  
 == Humidity Sensor == == Humidity Sensor ==
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 <figure humiditysensor2> <figure humiditysensor2>
-{{ :en:iot-open:getting_familiar_with_your_hardware_rtu_itmo_sut:arduino_and_arduino_101_intel_curie:sch_apz_shemas_humidity.png?200 | Arduino Uno and humidity sensor schematics}}+{{ :en:iot-open:getting_familiar_with_your_hardware_rtu_itmo_sut:arduino_and_arduino_101_intel_curie:sch_apz_shemas_humidity.png?230 | Arduino Uno and humidity sensor schematics}}
 <caption>Arduino Uno and humidity sensor schematics</caption> <caption>Arduino Uno and humidity sensor schematics</caption>
 </figure> </figure>
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 } }
 </code>  </code> 
 +
 +<note important>DHT sensors use their own One Wire communication standard that is incompatible with standard 1-Wire, even if it uses a similar connection schema.</note>
  
 == Sound Sensor == == Sound Sensor ==
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 <figure gassensor2> <figure gassensor2>
-{{ :en:iot-open:getting_familiar_with_your_hardware_rtu_itmo_sut:arduino_and_arduino_101_intel_curie:sch_apz_shemas_gas.png?200 | Arduino Uno and MQ2 gas sensor schematics}}+{{ :en:iot-open:getting_familiar_with_your_hardware_rtu_itmo_sut:arduino_and_arduino_101_intel_curie:sch_apz_shemas_gas.png?230 | Arduino Uno and MQ2 gas sensor schematics}}
 <caption>Arduino Uno and MQ2 gas sensor schematics</caption> <caption>Arduino Uno and MQ2 gas sensor schematics</caption>
 </figure> </figure>
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 <code c> <code c>
 #include <HardwareSerial.h> #include <HardwareSerial.h>
-#include >Arduino.h>+#include <Arduino.h>
  
 // Define the serial port for the PMS5003 sensor // Define the serial port for the PMS5003 sensor
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   Serial.begin(9600);    Serial.begin(9600); 
      
-  pinMode(SET_PIN, OUTPUT);     //controls sensor's low power mode (LOW) -> controls fan down+  pinMode(SET_PIN, OUTPUT);     //controls sensor's low power mode  
 +                                //(LOW) -> turns fan down
   pinMode(RESET_PIN, OUTPUT);   //controls sensor's reset (LOW)   pinMode(RESET_PIN, OUTPUT);   //controls sensor's reset (LOW)
   digitalWrite(SET_PIN, HIGH);  //enable both   digitalWrite(SET_PIN, HIGH);  //enable both
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 <figure sensor_bme280_2> <figure sensor_bme280_2>
-{{ :en:iot-open:hardware2:bme280_schematics.png?200 | BME 280 connection circuit (I2C)}}+{{ :en:iot-open:hardware2:bme280_schematics.png?230 | BME 280 connection circuit (I2C)}}
 <caption>BME 280 connection circuit (I2C)</caption> <caption>BME 280 connection circuit (I2C)</caption>
 </figure> </figure>
en/iot-open/hardware2/sensors_environment.1700602428.txt.gz · Last modified: 2023/11/21 21:33 by ktokarz
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