Quicksand micro-electronics / Mbed 2 deprecated QW-Closet-detection

This program shows how to use the VCNL4010 (proximity and ambient light sensor) on the QW dev kit for detecting an open closet door. When the closet is open, a message will be displayed in the console window and a Sigfox message will be send.

Dependencies:   QW_Sensors mbed

Fork of QW-Closet-detection by Quicksand

QW Closet Detection

This program shows how to use the VCNL4010 (proximity and ambient light sensor) on the QW dev kit for detecting an open closet door. When the closet is open, a message will be displayed in the console window and a Sigfox message will be send.

Code explanation

The program starts with the initialisation/declaration of the leds, pushbuttons and sensor. Also the necessary function prototypes and serial communications are declared. After the initialisation phase, the sensor ID is read. After that, the program is waiting for a push on one of the buttons to calibrate the "device". Once calibrated, the program enters an infinite loop. Each loop the ambient light value is read. When a certain threshold is passed, a led is turned on to indicate an open closet, a message is shown in the console window and a Sigfox message is transmitted. When the Sigfox message is transmitted, the loop continuous.

Sigfox message payload

First there is the "05", this is the Quicksand ID of the example program. This is used by Quicksand to keep track of our example programs. The second value that is transmitted is the ambient light value the moment when an open closet was detected.

More information and other example code can be found on the component page by clicking the link below: https://developer.mbed.org/components/QW-SIGFOX-Development-Kit/

#include "mbed.h"
#include "VCNL4010.h"

DigitalOut LED_0 (PB_6);
DigitalOut LED_1 (PA_7);
DigitalOut LED_2 (PA_6);
DigitalOut LED_3 (PA_5);
 
//Virtual serial port over USB
Serial pc(USBTX, USBRX);
Serial modem(PA_9, PA_10);

// configure VCNL4010
VCNL40x0 VCNL40x0_Device (PB_9, PB_8, VCNL40x0_ADDRESS);      // Define SDA, SCL pin and I2C address


int main() {
    
    LED_0 = 1;
    LED_1 = 1;
    LED_2 = 1;
    LED_3 = 1;

    unsigned char ID=0;
    unsigned int  AmbiValue=0;
    
       // print information on screen
    pc.printf("\n\n VCNL4010 Proximity/Ambient Light Sensor");
    pc.printf("\n Read Ambillight on demand in endless loop");

    VCNL40x0_Device.ReadID (&ID);                           // Read VCNL40x0 product ID revision register
    pc.printf("\n\n Product ID Revision Register: %d", ID);

    wait_ms(3000);                                          // wait 3s (only for display)
    
    while(1) { 
        VCNL40x0_Device.ReadAmbiOnDemand (&AmbiValue);      // read ambi value on demand
        pc.printf("Ambient light: %5.0i cts \tIlluminance: %7.2f lx\r", AmbiValue, AmbiValue/4.0);
        if(AmbiValue < 5000) LED_3 = 0;
        else LED_3 = 1;
        if(AmbiValue < 4000) LED_2 = 0;
        else LED_2 = 1;
        if(AmbiValue < 3000) LED_1 = 0;
        else LED_1 = 1;
        if(AmbiValue < 2000) LED_0 = 0;
        else LED_0 = 1;
    }
}