Improve output formatting in examples

Author: PaintYourDragon

examples/DHT_Unified_Sensor/DHT_Unified_Sensor.ino

@@ -11,12 +11,12 @@
 #include <DHT.h>
 #include <DHT_U.h>
 
-#define DHTPIN            2         // Pin which is connected to the DHT sensor.
+#define DHTPIN     2         // Pin connected to the DHT sensor.
 
 // Uncomment the type of sensor in use:
-//#define DHTTYPE           DHT11     // DHT 11 
-#define DHTTYPE           DHT22     // DHT 22 (AM2302)
-//#define DHTTYPE           DHT21     // DHT 21 (AM2301)
+//#define DHTTYPE    DHT11     // DHT 11
+#define DHTTYPE    DHT22     // DHT 22 (AM2302)
+//#define DHTTYPE    DHT21     // DHT 21 (AM2301)
 
 // See guide for details on sensor wiring and usage:
 //   https://learn.adafruit.com/dht/overview
@@ -26,33 +26,32 @@ DHT_Unified dht(DHTPIN, DHTTYPE);
 uint32_t delayMS;
 
 void setup() {
-  Serial.begin(9600); 
+  Serial.begin(9600);
   // Initialize device.
   dht.begin();
-  Serial.println("DHTxx Unified Sensor Example");
+  Serial.println(F("DHTxx Unified Sensor Example"));
   // Print temperature sensor details.
   sensor_t sensor;
   dht.temperature().getSensor(&sensor);
-  Serial.println("------------------------------------");
-  Serial.println("Temperature");
-  Serial.print  ("Sensor:       "); Serial.println(sensor.name);
-  Serial.print  ("Driver Ver:   "); Serial.println(sensor.version);
-  Serial.print  ("Unique ID:    "); Serial.println(sensor.sensor_id);
-  Serial.print  ("Max Value:    "); Serial.print(sensor.max_value); Serial.println(" *C");
-  Serial.print  ("Min Value:    "); Serial.print(sensor.min_value); Serial.println(" *C");
-  Serial.print  ("Resolution:   "); Serial.print(sensor.resolution); Serial.println(" *C");  
-  Serial.println("------------------------------------");
+  Serial.println(F("------------------------------------"));
+  Serial.println(F("Temperature Sensor"));
+  Serial.print  (F("Sensor Type: ")); Serial.println(sensor.name);
+  Serial.print  (F("Driver Ver:  ")); Serial.println(sensor.version);
+  Serial.print  (F("Unique ID:   ")); Serial.println(sensor.sensor_id);
+  Serial.print  (F("Max Value:   ")); Serial.print(sensor.max_value); Serial.println(F("°C"));
+  Serial.print  (F("Min Value:   ")); Serial.print(sensor.min_value); Serial.println(F("°C"));
+  Serial.print  (F("Resolution:  ")); Serial.print(sensor.resolution); Serial.println(F("°C"));
+  Serial.println(F("------------------------------------"));
   // Print humidity sensor details.
   dht.humidity().getSensor(&sensor);
-  Serial.println("------------------------------------");
-  Serial.println("Humidity");
-  Serial.print  ("Sensor:       "); Serial.println(sensor.name);
-  Serial.print  ("Driver Ver:   "); Serial.println(sensor.version);
-  Serial.print  ("Unique ID:    "); Serial.println(sensor.sensor_id);
-  Serial.print  ("Max Value:    "); Serial.print(sensor.max_value); Serial.println("%");
-  Serial.print  ("Min Value:    "); Serial.print(sensor.min_value); Serial.println("%");
-  Serial.print  ("Resolution:   "); Serial.print(sensor.resolution); Serial.println("%");  
-  Serial.println("------------------------------------");
+  Serial.println(F("Humidity Sensor"));
+  Serial.print  (F("Sensor Type: ")); Serial.println(sensor.name);
+  Serial.print  (F("Driver Ver:  ")); Serial.println(sensor.version);
+  Serial.print  (F("Unique ID:   ")); Serial.println(sensor.sensor_id);
+  Serial.print  (F("Max Value:   ")); Serial.print(sensor.max_value); Serial.println(F("%"));
+  Serial.print  (F("Min Value:   ")); Serial.print(sensor.min_value); Serial.println(F("%"));
+  Serial.print  (F("Resolution:  ")); Serial.print(sensor.resolution); Serial.println(F("%"));
+  Serial.println(F("------------------------------------"));
   // Set delay between sensor readings based on sensor details.
   delayMS = sensor.min_delay / 1000;
 }
@@ -61,24 +60,24 @@ void loop() {
   // Delay between measurements.
   delay(delayMS);
   // Get temperature event and print its value.
-  sensors_event_t event;  
+  sensors_event_t event;
   dht.temperature().getEvent(&event);
   if (isnan(event.temperature)) {
-    Serial.println("Error reading temperature!");
+    Serial.println(F("Error reading temperature!"));
   }
   else {
-    Serial.print("Temperature: ");
+    Serial.print(F("Temperature: "));
     Serial.print(event.temperature);
-    Serial.println(" *C");
+    Serial.println(F("°C"));
   }
   // Get humidity event and print its value.
   dht.humidity().getEvent(&event);
   if (isnan(event.relative_humidity)) {
-    Serial.println("Error reading humidity!");
+    Serial.println(F("Error reading humidity!"));
   }
   else {
-    Serial.print("Humidity: ");
+    Serial.print(F("Humidity: "));
     Serial.print(event.relative_humidity);
-    Serial.println("%");
+    Serial.println(F("%"));
   }
 }

examples/DHTtester/DHTtester.ino

@@ -25,7 +25,7 @@ DHT dht(DHTPIN, DHTTYPE);
 
 void setup() {
   Serial.begin(9600);
-  Serial.println("DHTxx test!");
+  Serial.println(F("DHTxx test!"));
 
   dht.begin();
 }
@@ -44,7 +44,7 @@ void loop() {
 
   // Check if any reads failed and exit early (to try again).
   if (isnan(h) || isnan(t) || isnan(f)) {
-    Serial.println("Failed to read from DHT sensor!");
+    Serial.println(F("Failed to read from DHT sensor!"));
     return;
   }
 
@@ -53,17 +53,15 @@ void loop() {
   // Compute heat index in Celsius (isFahreheit = false)
   float hic = dht.computeHeatIndex(t, h, false);
 
-  Serial.print("Humidity: ");
+  Serial.print(F("Humidity: "));
   Serial.print(h);
-  Serial.print(" %\t");
-  Serial.print("Temperature: ");
+  Serial.print(F("%  Temperature: "));
   Serial.print(t);
-  Serial.print(" *C ");
+  Serial.print(F("°C "));
   Serial.print(f);
-  Serial.print(" *F\t");
-  Serial.print("Heat index: ");
+  Serial.print(F("°F  Heat index: "));
   Serial.print(hic);
-  Serial.print(" *C ");
+  Serial.print(F("°C "));
   Serial.print(hif);
-  Serial.println(" *F");
+  Serial.println(F("°F"));
 }