![[PukiWiki]](image/ROBO192.png "[PukiWiki]")
(写真は秋月電子ホームページから)| 1 | VDD Power supply(2.6 -5.5V) |
| 2 | SDA Serial data, bidirectional port |
| 3 | GND Ground |
| 4 | SCL Serial clock input port (single bus ground) |
| 1 | VDD Power supply(2.6 -5.5V) |
| 2 | SDA Serial data, bidirectional port, プルアップ抵抗必須 |
| 3 | GND Ground |
| 4 | GND Ground |
(写真は秋月電子ホームページから)| 1 | VDD Power supply(3.3 -5.5V) |
| 2 | SDA Serial data, bidirectional port |
| 3 | NC 使わない |
| 4 | GND Ground |
| センサー | Arduino |
| 1 | 5V |
| 2 | A4 (データ) |
| 3 | GND |
| 4 | A5 (クロック) |
| デバイス | AM2302 | Arduino | AM2321 | Arduino | |
| ピン番号 |  |  | |||
| 配線 | 1 | 5V | 1 | 5V | |
| 2 | 2 (データ) | 2 | 4 (データ, 10kΩでプルアップ) | ||
| 3 | 配線しない | 3 | GND | ||
| 4 | GND | 4 | GND |
#include <DHT.h>
#define DHTPIN2 2 // センサー1つめ(AM2302)は Arduino 2番ピンへ
#define DHTPIN4 4 // センサー2つめ(AM2321)は Arduino 4番ピンへ
#define DHTTYPE DHT22 // DHT 22 (AM2301, AM2321)
// Connect pin 1 (on the left) of the sensor to +5V
// Connect pin 2 of the sensor to whatever your DHTPIN is
// Connect pin 3 of the sensor to GROUND (AM2321)
// Connect pin 4 (on the right) of the sensor to GROUND
// ※ AM2321 の 2番ピンに 10KΩ のプルアップ抵抗を。
// Initialize DHT sensor for normal 16mhz Arduino
DHT dht2(DHTPIN2, DHTTYPE);
DHT dht4(DHTPIN4, DHTTYPE);
void setup() {
Serial.begin(9600);
Serial.println("Using 2 DHTxx sensors!");
Serial.println(" --2: 2302-- --4: 2321--");
Serial.println(" Temp, Humid, Temp, Humid");
dht2.begin();
dht4.begin();
}
void loop() {
// Wait a few seconds between measurements.
delay(2000);
Serial.print( dht2.readTemperature() );
Serial.print(", ");
Serial.print( dht2.readHumidity() );
Serial.print(", ");
Serial.print( dht4.readTemperature() );
Serial.print(", ");
Serial.println( dht4.readHumidity() );
}
Results.png
AM2321.JPG
AM2302.JPG
Sensors.JPG
