Add support for the DHT11/DHT22 sensors

config.h.sample

@@ -32,3 +32,18 @@
 // different for each station you install (e.g. if you want to measure the
 // temperature and humidity of each room separately)
 #define MDNS_NAME "internal-hostname"
+
+// If you have a DHT temperature+humidity sensor of this type will be used,
+// remove the #undef line and uncomment one of DHT11 or DHT22.  You also have
+// to define the PIN your DHT sensor’s data (usually marked as DAT) is
+// connected to.
+//
+// DHT11 sensors are usually blue, and don’t work under freezing point
+// (0°C/32°F)
+//
+// DHT22 sensors are usually white and slightly bigger than DHT11 ones.  They
+// work well under freezing point (usually above -40°C/-40°F)
+#undef DHT_TYPE
+//#define DHT_TYPE DHT11
+//#define DHT_TYPE DHT22
+//#define DHT_PIN D5