Varul Jain
Published

Color Luminescence Detection Using TMG39931 Interface ESP32

Interface the TMG39931 with an ESP32 module which can send the sensor data to your application software.

BeginnerFull instructions provided2 hours368
Color Luminescence Detection Using TMG39931 Interface ESP32

Things used in this project

Hardware components

National Control Devices TMG39931
×1
National Control Devices ESP32
×1

Story

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Code

TMG339931_ESP32_Node-Red

C/C++
#include "BluetoothSerial.h"
#include<Wire.h>
#if !defined(CONFIG_BT_ENABLED) || !defined(CONFIG_BLUEDROID_ENABLED)
#error Bluetooth is not enabled! Please run `make menuconfig` to and enable it
#endif

BluetoothSerial SerialBT;
#define Addr 0x39
volatile float g,r,b,cD,cc;

void setup() {
  Wire.begin(21,22);
  Serial.begin(115200);
  SerialBT.begin("ESP32test"); //Bluetooth device name
  Serial.println("The device started, now you can pair it with bluetooth!");
//  tmgLight();
}

void loop() {

  //volatile float g,r,b,cD,cc; 
  tmgLight();
  
  if (Serial.available()) {
    delay(100); 
    SerialBT.println("Hello");
    SerialBT.println(String(g,2));
    SerialBT.println(String(r,2));
    SerialBT.println(String(b,2));
    SerialBT.println(String(cD,2));
    SerialBT.println(String(cc,0));
    }
  
  delay(20);
}

void tmgLight(){

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select Enable register
  Wire.write(0x80);
  // Power ON, ALS enable, Proximity enable, Wait enable
  Wire.write(0x0F);
  // Stop I2C transmission
  Wire.endTransmission();

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select ADC integration time register
  Wire.write(0x81);
  // ATIME : 712ms, Max count = 65535 cycles
  Wire.write(0x00);
  // Stop I2C transmission
  Wire.endTransmission();

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select Wait time register
  Wire.write(0x83);
  // WTIME : 2.78ms
  Wire.write(0xFF);
  // Stop I2C transmission
  Wire.endTransmission();

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select control register
  Wire.write(0x8F);
  // AGAIN is 1x
  Wire.write(0x00);
  // Stop I2C transmission
  Wire.endTransmission();
  delay(300);

  unsigned int data[9];
  
  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select data register
  Wire.write(0x94);
  // Stop I2C transmission
  Wire.endTransmission();
  
  // Request 9 bytes of data
  Wire.requestFrom(Addr, 9);
   
  // Read the 9 bytes of data
  // cData channel LSB, cData channel MSB, Red channel LSB, Red channel MSB
  // Green channel LSB, Green channel MSB, Blue channel LSB, Blue channel MSB, proximity
  if(Wire.available() == 9) 
  {
    data[0] = Wire.read();
    data[1] = Wire.read();
    data[2] = Wire.read();
    data[3] = Wire.read();
    data[4] = Wire.read();
    data[5] = Wire.read();
    data[6] = Wire.read();
    data[7] = Wire.read();
    data[8] = Wire.read();
   }
   
  // Convert the data
  float cData = data[1] * 256.0 + data[0];
  float red = data[3] * 256.0 + data[2];
  float green = data[5] * 256.0 + data[4];
  float blue = data[7] * 256.0 + data[6];

  unsigned int c = data[8];
  
  // Output data to serial monitor       
  Serial.print("Green Color Luminance : ");
  Serial.println(green);
  Serial.print("Red Color Luminance : ");
  Serial.println(red)  ;
  Serial.print("Blue Color Luminance : ");
  Serial.println(blue) ;
  Serial.print("InfraRed Luminance : ");
  Serial.println(cData) ;
  Serial.print("Proximity of the device : ");
  Serial.println(c);
  delay(500);

  g = green;
  r = red;
  b = blue;
  cD = cData;
  c = cc;
}

Github

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Credits

Varul Jain

Varul Jain

12 projects • 11 followers
Beginner, Creator, IOT Developer, working with IOT Prototypes

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