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Mikroelektronika d.o.o.

Carte à clic DHT22 2

Carte à clic DHT22 2

SKU: MIKROE-2818
€21,95 EUR hors taxes
€21,95 EUR hors taxes
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Overview

Le DHT22 2 Click Board™ est utilisé pour mesurer la température ambiante et l'humidité relative. Il utilise le capteur AM2322 d'Aosong, avec des capacités de mesure thermique et d'humidité très précises. Il peut utiliser le protocole 1-Wire ou I2C pour communiquer avec le circuit intégré.

Des attributs tels que la taille ultra-petite, la faible consommation d'énergie, la distance de transmission du signal jusqu'à 20 mètres, font de ce capteur le choix parfait pour tous les types d'applications nécessitant la mesure de la température et de l'humidité.

The DHT22 2 Click Board™ is used for measuring the environmental temperature and relative humidity. It uses the AM2322 sensor, with very accurate thermal and humidity measuring capabilities. It can use either 1-Wire or I2C protocol to communicate with the integrated circuit.

Attributes like the ultra-small size, low-power consumption, signal transmission distance up to 20 meters, make this sensor the perfect choice for all kinds of applications that require measurement of the temperature and humidity.

How Does The DHT22 2 Click Board™ Work?

The DHT22 2 Click Board™ is based on the AM2322 sensor. This sensor contains humidity and temperature measurement elements, compensated and calibrated in the accurate calibration chamber. The calibration coefficient is saved in the OTP memory of an integrated MCU. The integrated MCU also provides I2C or 1-Wire interface, selectable by the onboard SMD jumper selectors. The operating voltage can also be selected by the onboard SMD jumper.

Typical temperature accuracy is ±0.3°C, while relative humidity accuracy is 2% RH, with the resolution of 0.1 for both measured properties.

I2C/1-Wire interface is used to communicate with the host MCU, sending the measurement data every 2 seconds. Proprietary data collecting techniques are used to average the sampled values, after which the result is sent via the I2C/1-Wire bus.

Specifications

Type Temperature & humidity
Applications Weather stations, HVAC systems, humidity regulators and so on
On-board modules AM2322 sensor with very accurate thermal and humidity measuring capabilities
Key Features Great measuring accuracy: ±0.3°C, ±2%RH at 25°C, ultra-small size, low power consumption, signal transmission distance up to 20 meters.
Interface 1-Wire,I2C
Compatibility mikroBUS
Click board size M (42.9 x 25.4 mm)
Input Voltage 3.3V or 5V


Pinout diagram

This table shows how the pinout on the DHT22 2 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes Pin Pin Notes
NC 1 AN PWM 16 OW 1-wire 
NC 2 RST INT 15 NC
NC 3 CS RX 14 NC
NC 4 SCK TX 13 NC
NC 5 MISO SCL 12 SCL I2C clock
NC 6 MOSI SDA 11 SDA I2C data
Power supply +3.3V 7 3.3V 5V 10 +5V Power supply
Ground GND 8 GND GND 9 GND Ground

DHT22 2 click maximum ratings

Description Min Typ Max Unit
Logic voltage level 3.3 5 5.5 V
SCL clock frequency 100 kHz
Measuring range (T) -40 +80 °C
Measuring range (RH) 0% 99% RH

Onboard settings and indicators

Label Name Default  Description
JP1 OW/SCL Right Digital interface selection. Left position 1-Wire, right position I2C.
JP2 OW/SDA Right Digital interface selection. Left position 1-Wire, right position I2C.
JP3 LOGIC SEL Left Logic level voltage selection. Left position 3.3V, right position 5V.
PWR Power LED - Power LED indicates that the click is powered on

 

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