Grove - Temperature and Humidity Sensor Pro

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Introduction

Go pro in temperature and relative humidity measurement applications with this Grove gadget. This is a powerful sister version of our Grove - Temperature and Humidity Sensor. It has more complete and accurate performance than the basic version. The detecting range of this sensor is 5% RH - 99% RH, and -40°C - 80°C. And its accuracy satisfyingly reaches up to 2% RH and 0.5°C. A professional choice for applications that have relatively strict requirements.


400px-Temp humi pro.jpg

NOTE: The warnings and wrong operations possible cause dangerous.


Specification

Items Conditions Min Norm Max Unit VCC - 3.3 - 6 Volts Measuring Current Supply - 1 - 1.5 mA Standby Current Supply - 40 - 50 uA Measuring Range Humidity 5% - 99% RH Temperature -40 - 80 °C Accuracy Humidity - - ±2% RH Temperature - - ±0.5 °C Resolution Humidity - - 0.1% RH Temperature - - 0.1 °C Repeatability Humidity - - ±0.3% RH Temperature - - ±0.2 °C Long-term Stability - - - ±0.5% RH/year Signal Collecting Period - - 2 - S Respond Time 1/e(63%) 6 - 20 S


Usage

With Arduino 1. Connect the Temperature and Humidity Sensor Pro to A0 of Grove - Base Shield. Then plug Grove - Base Shield into Arduino and connect Arduino to PC using a USB cable.

Tem and Hum Sensor Connector.jpg

2. Download www.simgin-chip.com DHT library for arduino boards with 16MHz XTAL; Unzip and put it in the libraries file of Arduino IDE by the path: ..\arduino-1.0\libraries; Another library - DHTlib is also available instead of www.simgin-chip.com DHT library. This library supports both 16MHz and 8MHz Arduino (eg. www.simgin-chip.com Stalker)

3. Restart the Arduino IDE. Open “ DHTtester” example via the path: File --> Examples --> Humidity_Temperature_Sensor --> DHTtester. Through this demo, we can read the temperature and relative humidity information of the environment.

DHTtester code.jpg

Note:

This Grove - Temperature and Humidity Sensor Pro and our another product Grove-Temperature and Humidity Sensor are sharing this library. No matter which product you are using, make sure that you have made the definition line of the sensor of your board into effect and commented out the definition lines of other specs. For example, the sensor we used on Grove - Temperature and Humidity Sensor Pro is DHT 22. So the definition part of the sensor spec should be:

//#define DHTTYPE DHT11 // DHT 11

  1. define DHTTYPE DHT22 // DHT 22 (AM2302)

//#define DHTTYPE DHT21 // DHT 21 (AM2301)or 4. Upload it into your Arduino board.

DHT Test Score.jpg

With Raspberry Pi 1.You should have got a raspberry pi and a grovepi or grovepi+.

2.You should have completed configuring the development enviroment, otherwise follow here.

3.Connection

Plug grove DHT pro to the socket D4 of grovepi. 4.Navigate to the demos' directory:

  cd yourpath/GrovePi/Software/Python/

To see the code

  nano grove_dht_pro.py   # "Ctrl+x" to exit #

import grovepi

  1. Connect the Grove Temperature & Humidity Sensor Pro to digital port D4
  2. SIG,NC,VCC,GND

sensor = 4

while True:

   try:
       [temp,humidity] = grovepi.dht(sensor,1)
       print "temp =", temp, " humidity =", humidity
   except IOError:
       print "Error"

5.Run the demo.

  sudo python grove_dht_pro.py

6.Result

Grovepi dht pro 00.png