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Sensors / Basic Sensors:

» BS 02: Light sensor

This example shows how to get the vale of light sensor. Sensor LDR connected to ANALOG5 pin

Required Materials

1 x Waspmote
1 x Battery
1 x MiniUSB wire
1 x LDR sensor (electronic adaptation needed)

Notes

This example can be executed in Waspmote v12 and Waspmote v15

Code

/*  
 *  ------ [BS_02] Getting the value of light sensor -------- 
 *  
 *  Explanation: This example shows how to get the vale of light
 *  sensor. Sensor LDR connected to ANALOG5 pin
 *  
 *  Copyright (C) 2016 Libelium Comunicaciones Distribuidas S.L. 
 *  http://www.libelium.com 
 *  
 *  This program is free software: you can redistribute it and/or modify 
 *  it under the terms of the GNU General Public License as published by 
 *  the Free Software Foundation, either version 3 of the License, or 
 *  (at your option) any later version. 
 *  
 *  This program is distributed in the hope that it will be useful, 
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of 
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
 *  GNU General Public License for more details. 
 *  
 *  You should have received a copy of the GNU General Public License 
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>. 
 *  
 *  Version:           3.0 
 *  Design:            Marcos Yarza 
 *  Implementation:    Marcos Yarza
 */

// variables
int light = 0;

void setup()
{
  // Open the USB connection
  USB.ON();
  USB.println(F("USB port started..."));

}

void loop()
{
  // read light sensor connected to ANALOG5 pin
  light = Utils.readLight();
  
  USB.print(F("Value of light: "));
  USB.print(light,DEC);
  USB.println(F(" % of light"));
  
  USB.println(F("------------------------------------------------------"));
  delay(1000); 
}

Output

H#
USB port started...
Value of light: 83 % of light
------------------------------------------------------
Value of light: 84 % of light
------------------------------------------------------
Value of light: 85 % of light
------------------------------------------------------
Value of light: 85 % of light
------------------------------------------------------
...

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