GY-49 MAX44009 digital illuminance light intensity sensor module i2c interface high precision

 เซนเซอร์วัดความสว่างของแสง GY-49 MAX44009 digital illuminance light intensity sensor module i2c interface high precision

ติดตั้ง TFT 1.44 Library ก่อนใช้งาน

• Adafruit-GFX-Library         :https://github.com/adafruit/Adafruit-GFX-Library

• Adafruit_ST7735-Library    : https://github.com/adafruit/Adafruit-ST7735-Library

Features

Wide 0.045 Lux to 188,000 Lux Range
VCC = 1.7V to 3.6V
ICC = 0.65µA Operating Current
-40°C to +85°C Temperature Range
Device Address Options – 1001 010x and 1001 011x

หา I2C ก่อน : SCAN I2C

จอ TFT 1.44 นิ้ว







Code:

#include  "Adafruit_GFX.h"    // Core graphics library

#include  "Adafruit_ST7735.h" // Hardware-specific library

#include  "SPI.h"

#include "Wire.h"

#define Addr 0x4A

//#define TFT_CS     D2  //esp8266

//#define TFT_RST    D3 

//#define TFT_DC     D4

#define TFT_CS     10  //nano

#define TFT_RST    9 

#define TFT_DC     8

#define BLACK   0x0000

#define RED     0x001F

#define BLUE    0xF800

#define GREEN   0x07E0

#define YELLOW  0x07FF

#define PURPLE  0xF81F

#define CYAN    0xFFE0  

#define WHITE   0xFFFF

Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS,  TFT_DC, TFT_RST);

#define TFT_SCLK 13   // set these to be whatever pins you like!

#define TFT_MOSI 11   // set these to be whatever pins you like!

float p = 22/7;

void setup(void) {

  // Use this initializer if you're using TFT

  tft.initR(INITR_BLACKTAB);   // initialize a ST7735S chip, black tab

  tft.fillScreen(ST7735_BLACK);

  print_labels();

  draw_buttons();

  delay(1000);

Wire.begin();

// Initialise serial communication

Serial.begin(115200);

Wire.beginTransmission(Addr);

Wire.write(0x02);

Wire.write(0x40);

Wire.endTransmission();

delay(300);

 }

void loop() {

 // tft.invertDisplay(false);

 // tft.fillScreen(ST7735_BLACK);

unsigned int data[2];

Wire.beginTransmission(Addr);

Wire.write(0x03);

Wire.endTransmission();

// Request 2 bytes of data

Wire.requestFrom(Addr, 2);

// Read 2 bytes of data luminance msb, luminance lsb

if (Wire.available() == 2)

{

data[0] = Wire.read();

data[1] = Wire.read();

// tft.print(lum);

}

 // Convert the data to lux

int exponent = (data[0] & 0xF0) >> 4;

int mantissa = ((data[0] & 0x0F) << 4) | (data[1] & 0x0F);

int lum = pow(2, exponent) * mantissa * 0.045;

Serial.print("Ambient Light luminance :");

Serial.print(lum);

Serial.println(" lux");

            tft.setTextColor(CYAN);

            tft.setTextSize(3);

            tft.setCursor(20,85);

            tft.print(lum);

 delay(1000);

 tft.fillRect(10, 80, 80, 30, BLACK);

 // tft.fillScreen(ST7735_BLACK);

delay(500);

//----------------------------

  tft.invertDisplay(false);

}

void print_labels(){

// tft.invertDisplay(false);

//  tft.fillScreen(ST7735_BLACK);

 // tft.setTextSize(1);

  //ON and OFF labels

  tft.setTextSize(2);

  tft.setTextColor(GREEN);

  tft.setCursor(22,8);

  tft.println("Ambient");

  tft.setCursor(25,28);

  tft.println(" light");

 tft.setCursor(10,48);

  tft.println("luminance");

            tft.setTextColor(CYAN);

            tft.setTextSize(3);

           tft.setCursor(10,55);

         //  tft.print(lum);

 tft.setCursor(100,100);

 tft.setTextSize(1);

 tft.setTextColor(YELLOW);

 tft.println("Lux");

 //display.clearDisplay();

}

void draw_buttons(){

}