Luminance IOT

This project allows you to check the luminance from a TSL2561 luminance sensor on a mobile App.

Hardware:

Arduino Uno

Ethernet Shield

Luminanace Sensor(TSL2561)

Wires.

Wiring

This section shows you how to connect the components together. First you have a pin-out connection and below there are pictures showing how it’s done on the real boards.

The schematic is

#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_TSL2561_U.h>
#include <SPI.h>
#include <Ethernet.h>

byte mac[] = { 0xDE, 0xED, 0xBE, 0xEF, 0xFE, 0xD2 };        // mac address for ethernet board
EthernetClient eth;                                         // the Ethernet client

char server[]  = "www.ic2pro.com";                          // Wiring Cloud host name
int port       = 80;
String devId   = "111-222-333";                             // Device ID. CREATE YOUR OWN GUID; Use this http://www.guidgenerator.com/
String auth    = "dXNlcjpwYXNzd29yZA==";                    // Authentication credentials Create a string from <email_address>:<API_Password> and encode it base64
                                                            // The sample here "dXNlcjpwYXNzd29yZA==" is the encoding for "user:password"
Adafruit_TSL2561_Unified tsl = Adafruit_TSL2561_Unified(TSL2561_ADDR_FLOAT, 12345);


// Update LUMINANCE signal on the Wiring Cloud
void sendLuminance(String luminance)
{
  Serial.println("Luminance = " + luminance);
  Serial.println("Send Luminance...");
  if (eth.connect(server, port)) {
    eth.println("GET http://" + String(server) + ":" + String(port) + "/Wire/connector/set?id=" + devId + "&LUMINANCE=" + luminance+ " HTTP/1.1");
    eth.println("Authorization: Basic " + auth);
    eth.println("Connection: close");
    eth.println();
    Serial.println("Luminance sent to server.");
  }
  else {
    Serial.println("Connection Error");
  }
  eth.stop();
}


// retrieve luminance from sensor (Check Adafruit documentation to see how it's done)
String getLuminance()
{
  String rs = "";
  sensors_event_t event;
  tsl.getEvent(&event);
 
  if (event.light)
    rs = String(event.light);
  else
    rs = "N/A";
    
  Serial.print("Luminance: ");  Serial.println(rs);

  return rs;
}

void displaySensorDetails(void)
{
  sensor_t sensor;
  tsl.getSensor(&sensor);
  Serial.println("------------------------------------");
  Serial.print  ("Sensor:       "); Serial.println(sensor.name);
  Serial.print  ("Driver Ver:   "); Serial.println(sensor.version);
  Serial.print  ("Unique ID:    "); Serial.println(sensor.sensor_id);
  Serial.print  ("Max Value:    "); Serial.print(sensor.max_value); Serial.println(" lux");
  Serial.print  ("Min Value:    "); Serial.print(sensor.min_value); Serial.println(" lux");
  Serial.print  ("Resolution:   "); Serial.print(sensor.resolution); Serial.println(" lux");
  Serial.println("------------------------------------");
  Serial.println("");
  delay(500);
}

void configureSensor(void)
{
  tsl.enableAutoRange(true);            // Auto-gain ... switches automatically between 1x and 16x 
  tsl.setIntegrationTime(TSL2561_INTEGRATIONTIME_13MS);      // fast but low resolution

  /* Update these values depending on what you've set above! */
  Serial.println("------------------------------------");
  Serial.print  ("Gain:         "); Serial.println("Auto");
  Serial.print  ("Timing:       "); Serial.println("13 ms");
  Serial.println("------------------------------------");
}


void setup() {
  Serial.begin(9600);
  Serial.println("Start...");

  Ethernet.begin(mac);                                           // start the Ethernet connection:
  delay(1000);                                                   // give the Ethernet shield a second to initialize:

  if(!tsl.begin())                                               // check if luminance sensor is workign
  {
    Serial.print("Ooops, no TSL2561 detected ... Check your wiring or I2C ADDR!");
    while(1);
  }

  /* Display some basic information on this sensor */
  displaySensorDetails();
  
  /* Setup the sensor gain and integration time */
  configureSensor();
}

void loop() {
    sendLuminance(getLuminance());
    delay(5000);                                                  // send luminance only every 5 seconds
}

Final Product from the app:

Tags:201802,Arduino Uno,Ethernet Shield w5100,Luminance Sensor.

Original Source: https://www.ic2cloud.com/luminance-iot