Grove - AHT20 I2C Industrial Grade Temperature&Humidity Sensor
AHT20 is a new generation of temperature and humidity sensor embedded with a dual-row flat and no-lead SMD package, suitable for the reflow soldering. AHT20 is equipped with a newly designed ASIC chip: an improved MEMS semiconductor capacitive humidity sensor, and a standard on-chip temperature sensor. The performance of AHT20 is more stable in harsh environments compared with the previous generation of temperature and humidity sensor such as Grove - Temperature & Humidity Sensor Pro (AM2302/DHT22), as a matter of fact, AHT20 is fittable in most industrial scenarios.
Feature¶
- Temperature measurement range -40 ~ 85°C, Humidity measurement range 0 ~ 100% RH
- Digital output, Grove I2C interface
- Excellent long-term stability
- SMD package suitable for reflow soldering
- Quick response and strong anti-interference ability
- Compatible with Arduino
- 4-pin interface reserved
Specification¶
| Item | Value |
|---|---|
| Operating Voltage | DC: 2.0V-5.5V |
| Measuring Range (humidity) | 0 ~ 100% RH |
| Temperature Range | -40 ~ + 85 ℃ |
| Humidity Accuracy | ± 2% RH (25 ℃) |
| Temperature Accuracy | ± 0.3 ℃ |
| Resolution | Temperature : 0.01 ℃; Humidity : 0.024% RH |
| Output Interface | Grove I²C Interface |
| I2C address | 0x38 |
Platform Supported¶
| Arduino | Raspberry Pi | |||
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Getting Started¶
Materials Required¶
| Seeeduino Lotus V1.1 | Grove-AHT20 Temperature&Humidity Sensor |
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| Get ONE Now | Get ONE Now |
Hardware Connection¶
Tip
Please plug the USB cable，Grove-AHT20 Temperature&Humidity Sensor Interface into Seeeduino Lotus V1.1 Interface gently, otherwise you may damage the port.
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Step 1. Plug Grove-AHT20 Temperature&Humidity Sensor into I2C interface of Seeeduino Lotus V1.1 with a Grove Cable.
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Step 2. Connect Seeeduino Lotus V1.1 to PC via a USB cable.
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Step 3. Download the code, please refer to the software part.
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Step 4. Run the code and the outcome will display on the screen of Serial Monitor in your Arduino IDE .
Software¶
Attention
If this is the first time you work with Arduino, we strongly recommend you to see Getting Started with Arduino before the start.
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Step 1. Download the Demo code.
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Step 2. Copy the whole Seeed_Arduino_AHT20 file and paste it into your Arduino IDE library file.
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Step 3. Open the BasicRead file of examples with your Arduino IDE.
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Step 4. Upload the demo. If you do not know how to upload the code, please check How to upload code.
Software Code¶
// ARDUINO DEMO FOR GROVE-AHT20
//
#include <Wire.h>
#include "AHT20.h"
AHT20 AHT;
void setup()
{
Serial.begin(115200);
Serial.println("AHT20 DEMO");
AHT.begin();
}
void loop()
{
float humi, temp;
int ret = AHT.getSensor(&humi, &temp);
if(ret) // GET DATA OK
{
Serial.print("humidity: ");
Serial.print(humi*100);
Serial.print("%\t temerature: ");
Serial.println(temp);
}
else // GET DATA FAIL
{
Serial.println("GET DATA FROM AHT20 FAIL");
}
delay(100);
}
// END FILE
Success
If everything goes well, you can go to Serial Monitor to see an outcome as following:
