Rev Author Line No. Line
2030 kakl 1 // I2C Light Sensor
2  
3 #include <Wire.h>
4  
5 #define address 0x44 // A0 = L
6  
7 void setup()
8 {
9 Wire.begin(); // join i2c bus (address optional for master)
10 pinMode(3, OUTPUT); // LED pro blikani, aby bylo videt, ze to neco dela
11 Serial.begin(9600); // Zmerena intenzita osvetleni se bude vypisovat na seriovou linku
12 }
13  
14 int data = 0;
15  
16 void loop()
17 {
18 Serial.print("COMMAND=");
19  
20 // Setup device
21 Wire.beginTransmission(address);
22 Wire.send(0x00); // sends address
23 Wire.send(0b11000001); // setup (eye light sensing; measurement range 2 [4000 lx])
24 Wire.endTransmission(); // stop transmitting
25  
26 // Delay for measurement
27 digitalWrite(3, HIGH); // set the LED on
28 delay(500);
29 digitalWrite(3, LOW); // set the LED off
30 delay(500);
31  
32  
33 // Connect to device and set register address
34 Wire.beginTransmission(address);
35 Wire.send(0x00); // sends address
36 Wire.endTransmission(); // stop transmitting
37 // Connect to device and request one byte
38 Wire.beginTransmission(address);
39 Wire.requestFrom(address, 1);
40 data = Wire.receive();
41 Wire.endTransmission(); // stop transmitting
42 Serial.print(data, HEX);
43  
44 Serial.print(" LSB=");
45 // Connect to device and set register address
46 Wire.beginTransmission(address);
47 Wire.send(0x01); // sends address
48 Wire.endTransmission(); // stop transmitting
49 // Connect to device and request one byte
50 Wire.beginTransmission(address);
51 Wire.requestFrom(address, 1);
52 data = Wire.receive();
53 Wire.endTransmission(); // stop transmitting
54 Serial.print(data, HEX);
55  
56 Serial.print(" MSB=");
57 // Connect to device and set register address
58 Wire.beginTransmission(address);
59 Wire.send(0x02); // sends address
60 Wire.endTransmission(); // stop transmitting
61 // Connect to device and request one byte
62 Wire.beginTransmission(address);
63 Wire.requestFrom(address, 1);
64 data = Wire.receive();
65 Wire.endTransmission(); // stop transmitting
66 Serial.print(data, HEX);
67  
68 Serial.print("\n");
69 }
70  
71