Crowtail-Weight Sensor

From Elecrow
Revision as of 07:19, 10 February 2017 by Sam (Talk | contribs)

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search

Description

This module can help you detect the temperature and humidity of the environment of your house. The HTU21D is a low-cost, easy to use, highly accurate, digital humidity and temperature sensor. This sensor is ideal for environmental sensing and data logging and perfect for a weather stations or humidor control systems. All you need is two lines for I2C communication and you’ll have relative humidity readings and very accurate temperature readings as a bonus!

Model:Crowtail- XXXX

400px

Specification

  • Supply voltage: 3.5 to 5.0V.
  • Humidity measurement range: 0-100% RH
  • Temperature measurement range: -40 ℃ -105 ℃
  • The maximum power consumption: 2.7uW
  • Communication: I2C
  • Humidity accuracy range (10% RH to 95% RH): HTU21D ± 2% RH
  • Humidity hysteresis: ± 1% RH
  • Measurement time: 50ms
  • Annual drift: -0.5% RH / year
  • Response time: 5 s

Usage

This demo is going to show you how to read temperature and humidity information from this Crowtail - HTU21D Humidity&Temperature Sensor.

1.Hardware Connection
The HTU21D Humidity&Temperature Sensor is connecting to digital port D5 of Crowtail - Base Shield.

Connection of HTU21D Humidity&Temperature Sensor.jpg

2.Download the HTU21D Humidity&Temperature Sensor Library. Unzip and put it in the libraries file of Arduino IDE by the path: ..File/arduino IDE/Arduino/library/SparkFunHTU21D. You can also copy the following program to Arduino IDE and upload to your Arduino/Crowduino.

3.Open “SparkFunHTU21D” example:


#include <Wire.h>
#include "SparkFunHTU21D.h"

//Create an instance of the object
HTU21D myHumidity;

void setup()
{
  Serial.begin(9600);
  Serial.println("HTU21D Example!");

  myHumidity.begin();
}

void loop()
{
  float humd = myHumidity.readHumidity();
  float temp = myHumidity.readTemperature();

  Serial.print("Time:");
  Serial.print(millis());
  Serial.print(" Temperature:");
  Serial.print(temp, 1);
  Serial.print("C");
  Serial.print(" Humidity:");
  Serial.print(humd, 1);
  Serial.print("%");

  Serial.println();
  delay(1000);
}

4.Upload it into your Arduino board and open the serial monitor to observe the temperature and relative humidity information of the environment.

Result of HTU21D Humidity&Temperature Sensor.png

Personal tools
Namespaces

Variants
Actions
Elecrow Store
Navigation
Elecrow Products
Toolbox