Difference between revisions of "Temperature & Humidity Sensor"

Outline

This mCookie sensor uses an AM2321 chip and the standard mCookie connector to give you the ability to quickly add high precision temperature measuring and humidity sensing to any Microduino project. The sensor has an on-board microprocessor delivering rapid response, high noise tolerance and excellent data quality.

Specification

• Electrical Specifications
  • Operation Voltage: 2.6~5V；
  • Output: Data over I2C bus protocol
• Technical Specifications
  • Resolution:
    • 0.1 Degrees Celsius (°C)
    • 0.1 percent (%) Relative Humidity
• Dimensions
  • Dimensions of the Sensor: 8mm*11mm
  • Dimensions of the Board: 20mm*10mm
  • Connector Interface: 4 Pin, 1.27mm-pitch
• Communication Protocol
  • Interface: I¬¬2C
  • Pins: SDA (data), SCL (clock), VCC (power) and GND (ground)

Development

Equipment

• Other Hardware Equipment
  • One USB cable

Preparation

• Setup 1：Connect Microduino-Temp&Hum to the IIC port of the Hub.

• Setup 2：Stack the CoreUSB, Hub and Sound together and then connect them to the computer with a USB cable.

Experiment: Detect Temp&Hum Values

• Open the Arduino IDE and copy the following code into IDE, or select from the examples built into the IDE:

 File->Examples->_07_Sensor_Temp_Hum_AM2321->'read_simple'

#include <Wire.h>
#include <AM2321.h>

void setup() {
  Serial.begin(9600);
}

void loop() {
  readByAM2321();
  delay(500);
}

void readByAM2321()
{
  AM2321 am2321;
  am2321.read();

  Serial.print("(");
  Serial.print(am2321.temperature/10.0);
  Serial.print(", ");
  Serial.print(am2321.humidity/10.0);
  Serial.println(')');
}

• Select the right board from Tools→Serial Port in Arduino IDE and download the program.

• Open the serial monitor after download; The value displayed reflects the current temperature and humidity.

Program Debugging

• The program uses AM2321 temperature and humidity collection library and defines "#include <Wire.h>" and "#include <AM2321.h>" as driving files.
• “am2321.temperature/10.0”represents the calculated temperature value and " am2321.humidity/10.0" represents the calculated humidity value.

Application

Microudino-Temp&Hum can be widely applied in HVAC system, dehumidifier, testing and detection equipment, consumer goods, automobile, automatic control, data recorder, weather station, appliances, humidity control, medical care, and other relative humidity detection control.

Video