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PhotoTestSimple/PhotoTestSimple.ino

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+/* Photocell simple testing sketch.
+Connect one end of the photocell to 5V, the other end to Analog 0.
+ Then connect one end of a 10K resistor from Analog 0 to ground
+For more information see http://learn.adafruit.com/photocells */
+
+int photocellPin = 1; // the cell and 10K pulldown are connected to a0
+int photocellReading; // the analog reading from the analog resistor divider
+
+void setup(void) {
+  // We'll send debugging information via the Serial monitor
+  Serial.begin(9600);
+}
+
+void loop(void) {
+  photocellReading = analogRead(photocellPin);
+  Serial.print("Analog reading = ");
+  Serial.print(photocellReading); // the raw analog reading
+  // We'll have a few threshholds, qualitatively determined
+  if (photocellReading < 10) {
+    Serial.println(" - Noir");
+  } else if (photocellReading < 200) {
+    Serial.println(" - Sombre");
+  } else if (photocellReading < 500) {
+    Serial.println(" - Lumiere");
+  } else if (photocellReading < 800) {
+    Serial.println(" - Lumineux");
+  } else {
+    Serial.println(" - Tres lumineux");
+  }
+  delay(5000);
+}