Grove - Temperature and Humidity Sensor Pro

Introduction

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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 reaches up to 2% RH and 0.5°C. A professional choice for applications that have relatively strict requirements.

Specification

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

Platforms Supported

Getting Started

Here are the getting started user guides.

• Preface - Getting Started
• Introduction to Grove

We provide 2 demos, include both arduino and raspberry pi platforms.

With Arduino

We will show you how this Grove - temperature and humidity Sensor pro works through a simple demo. First of all, you need to prepare the below stuffs:

Seeeduino V4	Grove - DHT Sensor pro	Base Shield
Get ONE Now	Get ONE Now	Get ONE Now

• 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.

• Please follow how to install an arduino library procedures to install library.

• Download Seeed DHT library for arduino boards with 16MHz XTAL; Another library - DHTlib is also available instead of Seeed DHT library. This library supports both 16MHz and 8MHz Arduino (eg. Seeeduino Stalker)

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

//#define DHTTYPE DHT11   // DHT 11
#define DHTTYPE DHT22   // DHT 22  (AM2302)
//#define DHTTYPE DHT21   // DHT 21 (AM2301)or

• Upload it into your Arduino board.
• Here is the result.

With Raspberry Pi

First, You need to prepare the below stuffs:

Raspberry pi	Grove - DHT Sensor pro	Grovepi+
Get ONE Now	Get ONE Now	Get ONE Now

• Follow instruction to configure the development environment.

• Plug grove DHT pro to the socket D4 of grovepi+.

• 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

# Connect the Grove Temperature & Humidity Sensor Pro to digital port D4
# SIG,NC,VCC,GND
sensor = 4

while True:
    try:
        [temp,humidity] = grovepi.dht(sensor,1)
        print "temp =", temp, " humidity =", humidity

    except IOError:
        print "Error"

• Run the demo.

      sudo python grove_dht_pro.py

• Here is the Result.

Resources

• Temp Humi Pro in eagle format
• Temp Humi Pro PCB in PDF format
• Temp Humi Pro Schematic in PDF format
• Humidity Temperature Sensor pro library
• AM2302-CN.pdf
• AM2302-EN.pdf

Help us make it better

Welcome to the new documentation system of Seeed Studio. We have made a lot of progress comparing to the old wiki system and will continue to improve it to make it more user friendly and helpful. The improvement can't be done without your kindly feedback. If you have any suggestions or findings, you are most welcome to submit the amended version as our contributor via Github or give us suggestions in the survey below, it would be more appreciated if you could leave your email so that we can reply to you. Happy Hacking!