53 lines
1.2 KiB
Arduino
53 lines
1.2 KiB
Arduino
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/*
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Example of BH1750 library usage.
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This example initialises the BH1750 object using the default high resolution
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continuous mode and then makes a light level reading every second.
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Connection:
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VCC -> 3V3 or 5V
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GND -> GND
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SCL -> SCL (A5 on Arduino Uno, Leonardo, etc or 21 on Mega and Due, on esp8266 free selectable)
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SDA -> SDA (A4 on Arduino Uno, Leonardo, etc or 20 on Mega and Due, on esp8266 free selectable)
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ADD -> (not connected) or GND
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ADD pin is used to set sensor I2C address. If it has voltage greater or equal to
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0.7VCC voltage (e.g. you've connected it to VCC) the sensor address will be
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0x5C. In other case (if ADD voltage less than 0.7 * VCC) the sensor address will
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be 0x23 (by default).
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*/
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#include <Wire.h>
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#include <BH1750.h>
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BH1750 lightMeter;
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void setup(){
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Serial.begin(9600);
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// Initialize the I2C bus (BH1750 library doesn't do this automatically)
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Wire.begin();
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// On esp8266 you can select SCL and SDA pins using Wire.begin(D4, D3);
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lightMeter.begin();
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Serial.println(F("BH1750 Test begin"));
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}
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void loop() {
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uint16_t lux = lightMeter.readLightLevel();
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Serial.print("Light: ");
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Serial.print(lux);
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Serial.println(" lx");
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delay(1000);
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}
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