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diff --git a/03/photo2.jpg b/03/photo2.jpg
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diff --git a/03/source.txt b/03/source.txt
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+++ b/03/source.txt
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+
+#include <Wire.h>
+#include <BH1750.h>
+
+#define ledka D0
+
+BH1750 lightMeter;
+
+
+void setup(){
+
+  Serial.begin(9600);
+
+  pinMode(ledka, OUTPUT);
+
+  // Initialize the I2C bus (BH1750 library doesn't do this automatically)
+  Wire.begin();
+  // On esp8266 you can select SCL and SDA pins using Wire.begin(D4, D3);
+
+  lightMeter.begin();
+
+  Serial.println(F("BH1750 Test begin"));
+
+}
+
+
+void loop() {
+
+  float lux = lightMeter.readLightLevel();
+  Serial.print("Light: ");
+  Serial.print(lux);
+  Serial.println(" lx");
+  if(lux < 200)
+  {
+    digitalWrite(ledka, HIGH);
+  }
+    else
+  {
+    digitalWrite(ledka, LOW);
+  }
+  delay(1000);
+}
\ No newline at end of file
diff --git a/03/video-1575101935.mp4 b/03/video-1575101935.mp4
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