Ajay Elango
ECE 4180 final project- GPS based home automation: code for mbed controlling home devices
Revision 0:d9970d37dd77, committed 2014-04-28
- Comitter:
- ajayke
- Date:
- Mon Apr 28 17:58:19 2014 +0000
- Commit message:
- GPS based home automation: mbed controlling devices
Changed in this revision
diff -r 000000000000 -r d9970d37dd77 main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Mon Apr 28 17:58:19 2014 +0000
@@ -0,0 +1,165 @@
+#include "mbed.h"
+#include "rtos.h"
+AnalogIn light_1(p20); //light sensor
+AnalogIn proxi_2(p15); // for detecting motion within the house
+DigitalIn proxi_1(p5); // for security
+DigitalOut relay_1(p8);// power switch tail for controlling the lamp
+DigitalOut relay_2(p22);// power switch tail for controlling the fan
+DigitalIn P11(p11); // Digital inputs p10,p11,p12,p13,p14,p16,p17 for communication between two mbeds; p18 and p19 for handshake signals;
+DigitalIn P12(p12);
+DigitalIn P13(p13);
+DigitalIn P14(p14);
+DigitalIn P10(p10);
+DigitalIn P16(p16);
+DigitalIn P17(p17);
+DigitalOut P18(p18);
+DigitalIn P19(p19);
+DigitalOut myled(LED1);
+DigitalOut led2(LED2); // device 2
+DigitalOut led3(LED3); //device 3
+DigitalOut led4(LED4); //device 4
+Serial pc(USBTX,USBRX);
+float light_thresh=0.4; // set threshold value for light sensor
+float ir_value=0.4; // set threshold value for IR sensor to detect the presence inside the house
+int P111;
+ int P112;
+ int P113;
+ int P114;
+ int P115;
+ int P116;
+ int P117;
+ Mutex bulb; //for locking and unlocking the lamp
+ Mutex pc_lock; //for virtual COM port
+
+
+void security_thread(void const *args) // thread for detecting presence near the house
+{
+ while(true)
+ {
+
+ wait(2);
+ if(P116==1) // check if security feature is enabled or not
+ {
+ if(proxi_1==0) // check the status of proximity sensor
+ {
+ bulb.lock();
+ led2=1; //switch on device 2
+ relay_2=1; //switch on the fan
+ bulb.unlock();
+ wait(3);
+ led2=0; //switch off device 2
+ relay_2=0; //switch off the fan
+ wait(3);
+
+
+
+ }
+
+
+ }
+
+
+ }
+
+
+ }
+
+int main() {
+
+ P19.mode(PullUp);
+ proxi_1.mode(PullUp);
+
+ P18=1; // Initialize the hand shake signal
+ P116=0; // Make sure the security feature is turned off by default
+ Thread security(security_thread);
+
+ while(1) {
+
+ label: while(P19==1) // wait till the mbed receives data from the master mbed
+ {
+
+ }
+
+ if(P19==0) //make sure if the read signal is a correct one by waiting for one second and checking again
+ { wait(1);
+ if(P19!=0)
+ goto label;
+ }
+ //store the status of the digital input pins
+ P111=(int)P11; // D1
+ P112=(int)P12; // D2
+ P113=(int)P13; // D3
+ P114=(int)P14; // D4
+ P115=(int)P10; // manual=0;automatic=1
+ P116=(int)P16; //security on=1, off=0
+ P117=(int)P17; //near=0, far=1
+
+ pc_lock.lock();
+ pc.printf("\n P11: %d, P12: %d, P13: %d, P14:%d, P15:%d, P16:%d, P17:%d\n Proxi_2 %f\n ",P111,P112,P113,P114,P115,P116,P117,(float)proxi_2);
+
+ pc_lock.unlock();
+ P18=0; //Indicate the reception of data by pulling p18 low
+
+ // blink LED1 to indicate that data has been received
+ myled = 1;
+ wait(2);
+ myled = 0;
+ wait(2);
+ P18=1;
+
+
+ if((float)proxi_2<ir_value) // check presence inside house
+
+ {
+
+ if(P115==1) // check if automatic mode is turned on
+ {
+ if(P117==0) //check if the user is near the home location
+ {
+ if((float)light_1<light_thresh) //check value of light sensor, turn on light if it is less than the threshold
+ relay_1=1;
+ else relay_1=0; //turn off light if there is enough ambient light
+ pc.printf("Light sensor: %f \n",(float)light_1);
+ bulb.lock();
+ led2=1; //turn on device2
+ relay_2=1; //turn on the fan
+ bulb.unlock();
+ led3=1; //turn on device 3
+ led4=1; //turn on device 4
+
+
+ }
+ else //user is far away from home loation; turn off all devices
+ {
+ relay_1=0;
+ bulb.lock();
+ led2=0;
+ relay_2=0;
+ bulb.unlock();
+ led3=0;
+ led4=0;
+
+
+
+ }
+
+
+
+
+ }
+ else //if the system is in manual mode
+ {
+ relay_1=P111; // read status of the lamp
+ bulb.lock();
+ led2=P112; // read status of the device-2
+ relay_2=P112; //read status of the fan
+ bulb.unlock();
+ led3=P113; // read status of the device-3
+ led4=P114; // read status of the device-4
+
+
+ }
+
+ }
+}
+}
diff -r 000000000000 -r d9970d37dd77 mbed-rtos.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-rtos.lib Mon Apr 28 17:58:19 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed-rtos/#be2573f85b81
diff -r 000000000000 -r d9970d37dd77 mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Mon Apr 28 17:58:19 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/6473597d706e \ No newline at end of file