Overview
Grove-Temperature & Humidity Sensor Pro is a high accuracy temperature and humidity sensor based on the DHT22 module (also known as AM2302 or RHT03). High-cost performance and high precision make it ideal for temperature and humidity monitoring of Arduino and Raspberry Pi, you can also use it to make a thermometer and hygrometer.
The DHT22 includes a capacitive humidity sensor and a high precision temperature sensor. The range of humidity sensor is 0 to 99.9 %RH with ±2% accuracy while the temperature sensor ranges from -40 to 80℃ with ±0.5℃ accuracy. With the help of a built-in 8-bit microcontroller, the DHT22 converts the analog output of those two sensors to the digital signal, and output both temperature and humidity data via a single pin.
Compared with the DHT11, this product has higher precision and wider measurement range, but the usage and code are almost the same. Simply put, if you need higher measurement accuracy, this product will be a better choice.
Tech specs
|
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 |
Get Inspired
Easily monitorize your garden's environment with simple components.
Greenhouses are excellent ways to grow plants due to their compact nature and the fact that they can absorb and store the sun’s light as heat to keep their internal temperature higher than outside. But when it comes to adding ventilation for cooling things down, decreasing the humidity, or simply to avoid rain, most non-commercial ones still rely on someone to manually open or close the windows. This need for automation is what drove Michael Bernhard to create his own greenhouse climate regulation system. This project relies on a Nano Every to read the ambient temperature/humidity as well as control up to six motorized windows via three L298N dual H-bridge drivers. The Nano receives commands and other data over WiFi from an accompanying ESP8266 board for wireless remote control with a mobile phone. Each of these components and their connectors were added to a custom PCB and placed within a simple wooden enclosure to keep moisture out. An LCD at the top shows pertinent information such as the time, temperature, and humidity. The aforementioned WiFi control scheme not only allows for remote control of the windows, but also for the visualization of historical sensors data on a graph. Safety information, including errors and stored EEPROM data, can be viewed on the web application, too. To see more about this project, you can read Bernhard's write-up here on Hackster.io.
