Development v12

Warning - Product Update

All the resources present on this section belong to Waspmote v12, Waspmote Plug & Sense! v12 and Meshlium v3.8.

If you have a Waspmote v15, Waspmote Plug & Sense! v15 or Meshlium v4.0 please go to the new Development Section.

Check what is your version and what are the differences between the old and the new one in this document.

» SC 07: Crack Detection Sensor Reading

In this example the Smart Cities sensor board is turned on and the crack detection sensor read every second approximately, printing a message through the USB port if a crack has been detected.

Required Materials

1 x Waspmote
1 x Battery
1 x Smart Cities board
1 x Crack Detection sensor


* This sensor is thought to operate on the LDR socket.
* Remember to connect the battery to Waspmote for proper operation.
* The connection of the sensor is described in the Smart Cities technical guide.
* Take into account that when powering the luminosity sensor you will be turning on also the temperature, humidity and dust sensors.
* This example can only be executed in Waspmote v12


 *  --[SC_7] - Reading the Crack Detection Sensor on Smart Cities board-- 
 *  Explanation: Turn on the sensor every second, taking a measurement and
 *               printing its result through the USB port.
 *  Copyright (C) 2012 Libelium Comunicaciones Distribuidas S.L. 
 *  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 
 *  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 <>. 
 *  Version:           0.1 
 *  Design:            David Gascón 
 *  Implementation:    Manuel Calahorra

#include <WaspSensorCities.h>

// Variable to store the read value
float value;

void setup()
  // Turn on the USB and print a start message

  // Turn on the sensor board
  // Turn on the RTC
void loop()
  // Part 1: Sensor reading
  // Turn on the sensor and wait for stabilization and response time
  SensorCities.setSensorMode(SENS_ON, SENS_CITIES_CD);
  // Read the crack detection sensor and print a message if a crack is detected
  if( SensorCities.readValue(SENS_CITIES_CD) )
    USB.println(F("No Crack"));
  } else
    USB.println(F("New Crack Detected!"));
  // Turn off the sensor
  SensorCities.setSensorMode(SENS_OFF, SENS_CITIES_CD);


No Crack
No Crack
No Crack
New Crack Detected!
New Crack Detected!
New Crack Detected!

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