trying the SimpleDHT

SimpleDHT/examples/DHT22Default/DHT22Default.ino

@@ -0,0 +1,37 @@
+#include <SimpleDHT.h>
+
+// for DHT22, 
+//      VCC: 5V or 3V
+//      GND: GND
+//      DATA: 2
+int pinDHT22 = 2;
+SimpleDHT22 dht22(pinDHT22);
+
+void setup() {
+  Serial.begin(115200);
+}
+
+void loop() {
+  // start working...
+  Serial.println("=================================");
+  Serial.println("Sample DHT22...");
+  
+  // read without samples.
+  // @remark We use read2 to get a float data, such as 10.1*C
+  //    if user doesn't care about the accurate data, use read to get a byte data, such as 10*C.
+  float temperature = 0;
+  float humidity = 0;
+  int err = SimpleDHTErrSuccess;
+  if ((err = dht22.read2(&temperature, &humidity, NULL)) != SimpleDHTErrSuccess) {
+    Serial.print("Read DHT22 failed, err="); Serial.print(SimpleDHTErrCode(err));
+    Serial.print(","); Serial.println(SimpleDHTErrDuration(err)); delay(2000);
+    return;
+  }
+  
+  Serial.print("Sample OK: ");
+  Serial.print((float)temperature); Serial.print(" *C, ");
+  Serial.print((float)humidity); Serial.println(" RH%");
+  
+  // DHT22 sampling rate is 0.5HZ.
+  delay(2500);
+}