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- #include <Wire.h>
- #include <AS_BH1750.h>
- #include <LiquidCrystal.h>
- /*
- * LightMeter_LCD
- *
- * Version 1.2
- * Datum: 05.08.2013
- *
- * Das Programm benutzt den BH1750 (Umgebiungslichtsensor)
- * und zeigt die Werte in Lux auf einem 16x2-Symbol-LCD.
- *
- * Verdrahtung (UNO, Nano...)
- *
- * BH1750:
- * Sensor SCL pin an A5
- * Sensor SDA pin an A4
- * Sensor VDD pin an 5V
- * Sensor GND pin an GND
- * Sensor ADDR pin frei
- *
- * LCD in 4-Bit-Modus:
- * LCD RS pin an digital pin 8
- * LCD RW pin an digital pin 13
- * LCD Enable pin an digital pin 9
- * LCD D4 pin an digital pin 4
- * LCD D5 pin an digital pin 5
- * LCD D6 pin an digital pin 6
- * LCD D7 pin an digital pin 7
- *
- *
- * Copyright (c) 2013 Alexander Schulz. All right reserved.
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
- AS_BH1750 lightMeter;
- // Setup LCD-Shield
- LiquidCrystal lcd(8, 13, 9, 4, 5, 6, 7);
- void setup() {
- // Display initialisieren
- lcd.clear();
- lcd.begin(16, 2); // 16x2 Zeichen
- lcd.setCursor(0,0);
- lcd.print("LightMeter v1.0");
- lcd.setCursor(0,1);
- lcd.print("Initializing...");
- delay(1000);
- lcd.clear();
- if(!lightMeter.begin()){
- // Prüfen, ob Sensor vorhanden ist
- lcd.clear();
- lcd.setCursor(0,0);
- lcd.print("BH1750 not found");
- lcd.setCursor(0,1);
- lcd.print("check wiring!");
- while (1) {
- delay(1000);
- }
- }
- }
- void loop() {
- char clux[9];
- // Werte auslesen und aufbereiten
- float lux = lightMeter.readLightLevel();
- dtostrf(lux, 8, 1, clux);
- lcd.setCursor(0,0);
- lcd.print("Light level: ");
- lcd.setCursor(5,1);
- lcd.print(clux);
- lcd.print(" lx");
- delay(500);
- }
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