74 lines
1.9 KiB
Arduino
74 lines
1.9 KiB
Arduino
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/*
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Example of BH1750 library usage.
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This example initialises two BH1750 objects using different TwoWire
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instances (Wire and Wire1) and then makes a light level reading every second.
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This is the case for boards such as the ESP8266 and ESP32
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Connection:
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BH1750 A:
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VCC -> 3V3 or 5V
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GND -> GND
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SCL -> SCL (19 in this example)
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SDA -> SDA (18 in this example)
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ADD -> (not connected) or GND
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BH1750 B:
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VCC -> 3V3 or 5V
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GND -> GND
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SCL -> SCL (22 in this example)
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SDA -> SDA (21 in this example)
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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 "BH1750.h"
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#include "Wire.h"
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BH1750 bh1750_a;
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BH1750 bh1750_b;
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void setup() {
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Serial.begin(115200);
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Wire.begin(18, 19);
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Wire1.begin(21, 22);
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bh1750_a.begin(BH1750::CONTINUOUS_HIGH_RES_MODE, 0x23, &Wire);
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bh1750_b.begin(BH1750::CONTINUOUS_HIGH_RES_MODE, 0x23, &Wire1);
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}
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int error_counter_1_a = 0;
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int error_counter_2_a = 0;
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int error_counter_1_b = 0;
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int error_counter_2_b = 0;
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void loop() {
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float light_level_a;
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if (bh1750_a.measurementReady()) { light_level_a = bh1750_a.readLightLevel(); }
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float light_level_b;
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if (bh1750_b.measurementReady()) { light_level_b = bh1750_b.readLightLevel(); }
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if (lround(light_level_a) == -1) {
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error_counter_1_a++;
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}
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if (lround(light_level_a) == -2) {
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error_counter_2_a++;
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}
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if (lround(light_level_b) == -1) {
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error_counter_1_b++;
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}
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if (lround(light_level_b) == -2) {
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error_counter_2_b++;
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}
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Serial.printf("A: %.0f lux %d:%d :: B: %.0f lux %d:%d\n", light_level_a,
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error_counter_1_a, error_counter_2_a, light_level_b,
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error_counter_1_b, error_counter_2_b);
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delay(1000);
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}
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