ASAIR Temperature and Humidity Sensor AM2302 (Original)

ASAIR Temperature and Humidity Sensor AM2302 (Original) Documentation

Overview

The ASAIR Temperature and Humidity Sensor AM2302 is a widely used, high-accuracy sensor module that measures temperature and humidity in various environments. It's based on the AM2302 chip, which provides reliable and stable readings. This sensor module is suitable for IoT applications, weather stations, and other projects requiring accurate temperature and humidity monitoring.

Technical Specifications

Temperature measurement range: -40C to 80C (accuracy: 0.5C)
 Humidity measurement range: 0% to 99.9% RH (accuracy: 2%)
 Power supply: 3.3V to 5.5V
 Communication protocol: Digital single-bus
 Response time: 2 seconds

Connection Diagram

The AM2302 sensor module has three pins:

VCC (power supply)
 GND (ground)
 OUT (digital output)

Code Examples

### Example 1: Reading Temperature and Humidity using Arduino

This example demonstrates how to read temperature and humidity data using an Arduino board.

```c
#include <dht.h>

#define DHTPIN 2     // Pin connected to the OUT pin of the AM2302 sensor
#define DHTTYPE DHT22 // DHT 22 (AM2302)

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(9600);
  dht.begin();
}

void loop() {
  int chk = dht.read();
  if (chk == DHTLIB_OK) {
    Serial.print("Temperature: ");
    Serial.print(dht.readTemperature());
    Serial.println(" C");
    Serial.print("Humidity: ");
    Serial.print(dht.readHumidity());
    Serial.println(" %");
  } else {
    Serial.println("Error reading sensor data.");
  }
  delay(2000);
}
```

### Example 2: Reading Temperature and Humidity using Raspberry Pi (Python)

This example demonstrates how to read temperature and humidity data using a Raspberry Pi and Python.

```python
import time
import RPi.GPIO as GPIO

GPIO.setmode(GPIO.BCM)
GPIO.setup(17, GPIO.IN, pull_up_down=GPIO.PUD_UP)

def read_am2302_sensor():
    data = []
    GPIO.setup(17, GPIO.OUT)
    GPIO.output(17, GPIO.LOW)
    time.sleep(0.02)
    GPIO.output(17, GPIO.HIGH)
    GPIO.setup(17, GPIO.IN)

for i in range(40):
        while GPIO.input(17) == GPIO.LOW:
            continue
        t0 = time.time()
        while GPIO.input(17) == GPIO.HIGH:
            continue
        t1 = time.time()
        if (t1 - t0) > 0.00004:
            data.append(0)
        else:
            data.append(1)

humidity_bit = data[0:8]
    humidity = 0
    for i in range(8):
        humidity += humidity_bit[i]  2  (7 - i)

temperature_bit = data[16:24]
    temperature = 0
    for i in range(8):
        temperature += temperature_bit[i]  2  (7 - i)

return humidity, temperature

while True:
    humidity, temperature = read_am2302_sensor()
    print("Humidity: {:.2f}%".format(humidity))
    print("Temperature: {:.2f}C".format(temperature))
    time.sleep(2)
```

Note: These examples assume you have the necessary libraries and dependencies installed for your chosen platform.

Troubleshooting Tips

Ensure proper connections between the sensor module and your microcontroller or single-board computer.
 Verify that your code is correctly configured for the AM2302 sensor module.
 Check the power supply voltage and ensure it's within the recommended range.

By following these examples and technical specifications, you can successfully integrate the ASAIR Temperature and Humidity Sensor AM2302 into your IoT projects.