Revision 11:dc1b30349116, committed 2016-06-17

Comitter:

wadh4587

Date:

Fri Jun 17 12:18:35 2016 +0000

Parent:

10:f7a48cc24892

Commit message:

proximity buzzer with wifi link (client)

Changed in this revision

diff -r f7a48cc24892 -r dc1b30349116 main.cpp
--- a/main.cpp	Wed Jun 15 14:47:19 2016 +0000
+++ b/main.cpp	Fri Jun 17 12:18:35 2016 +0000
@@ -1,38 +1,42 @@
-/* Simpler prog based on the serial passthrough code to enable a command line driven test of esp8266
-* wifi modules.
-* NB this uses the mbed sleep() command to form a low power system but on some MCUs this is a problem
-* this works fine on an lpc1768 but not as yet on the KL25Z
+/*Arthur Spencer
+Code for KL25Z mbed using MaxSonar-EZ1 range finder and ESP8266 wifi device
 */
 #include "mbed.h"
 
-Serial pc(USBTX, USBRX); // serial terminal for the pc connection
-Serial dev(PTE0,PTE1);  // for KL25Z... asuming one can't use the PTA1 version which is the stdio
-DigitalOut led1(LED1); // twp leds
-DigitalOut led4(LED2); // to allow visual check of bidirectional comms
-DigitalOut rst(PTD7); // single digital pin to drive the esp8266 reset line
+AnalogIn ain(A0);           //Proximity analogue signal
+PwmOut buzz(D6);            //Alarm
+DigitalOut timer(D7);       //LED proximity indicator
+InterruptIn push(PTA5);     //Reste button
+int stop;
+//int data;
+
+Serial pc(USBTX, USBRX);    //erial terminal for the pc connection
+Serial dev(PTE0,PTE1);      //tx & rx for the wifi device
+DigitalOut led1(LED1);
+DigitalOut led2(LED2);
+DigitalOut led3(LED3);
+DigitalOut rst(PTD7);       //esp8266 reset line
+
 
 // subroutine to run anytime a serial interrupt arrives from the device
-// this basically passes everything thatthe device produces on to the pc terminal screen
+// passes everything thatthe device produces on to the pc terminal screen
 void dev_recv()
 {
-    led1 = !led1;
     while(dev.readable()) {
         pc.putc(dev.getc());
         wait_us(1);
     }
 }
+
 // subroutine to service the serial interrupt on the pc connection
-// this is a bit more complex - it takes what the use sends on the pc and copies it on to the device
-// the esp should echo these straight back to the the pc if all is well
-// this also detects the end of command character which is ascii 13 (0x0d) adn adds a linefeed after it =asscii 10 (0x0a)
+// this takes what the usb sends on the pc and copies it on to the device
+// this also detects the end of command character which is ascii 13 (0x0d) adn adds a linefeed after it = asscii 10 (0x0a)
 void pc_recv()
 {
     char c;
-    led4 = !led4;
     while(pc.readable()) {
         c = pc.getc();
         dev.putc(c);
-        //  pc.putc(c); // echo back
         if(c==13) {
             dev.putc(10); // send the linefeed to complement the carriage return generated by return key on the pc
             pc.putc(10);
@@ -40,24 +44,154 @@
     }
 }
 
+//Interrupt sequence to receive the 'safe' flag ('x') from the wifi link and stop the alarm
+void safe()      
+{
+    char i = dev.getc();
+    if(i == 'x') {
+        buzz = 0, timer = 0;
+        stop = 1;
+        //pc.printf("Alarm off\n\r");
+        led2 = 0, led1 = 1, led3 = 1;
+        //dev.printf("AT+CIPSEND=2,13\r\n");
+        //wait(0.05);
+        //dev.printf("Alarm Off\n\r \n\r");
+        //wait(0.05);
+        /*       if (data == 0) {
+                   dev.printf("AT+CIPSEND=3,1\r\n");
+                   wait(2);
+                   dev.printf("Q\r\n");
+                   wait(2);
+                   data = 1;
+               }*/
+    } else {
+        pc.putc(i);
+        /*   if (i == 'w') {                //Alternative sequence if action is to be taken when an intruder attempts to enter
+               stop = 0;
+               //pc.printf("INTRUDER\n\r");
+               dev.printf("AT+CIPSEND=2,12\r\n");
+               wait(0.05);
+               dev.printf("INTRUDER\n\r \n\r");
+               wait(0.05);
+               //data = 1;
+           } else {
+               pc.putc(i);
+           }*/
+    }
+}
+
+
+//Interrupt sequence to reset the alarm when the push button is pressed
+void activate()
+{
+    stop = 0;
+    //dev.printf("AT+CIPSEND=2,13\r\n");
+    //wait(0.05);
+    //dev.printf("Alarm Set\n\r \n\r");
+    //wait(0.05);
+    //pc.printf("Alarm Set\n\r");
+    /*    if (data == 1) {
+            dev.printf("AT+CIPSEND=3,1\r\n");
+            wait(2);
+            dev.printf("Q\r\n");
+            wait(2);
+            data = 0;
+        }*/
+    led1 = 1, led2 = 1, led3 = 0;
+    wait(1);
+}
+
+//Main sequence
 int main()
 {
+    float  volts, distance, p, q;
+    buzz.period_ms(2);
+    timer = 0;
+    buzz = 0;
+    stop = 0;
+    led3 = 1;
+    led2 = 1;
+    led1 = 0;
+    //data = 0;
+
     pc.baud(115200);
     dev.baud(115200);
-    rst=0;
+    rst = 0;
     wait(1);
     rst = 1; // send the esp8266 reset
     wait(1);
 
-    pc.attach(&pc_recv, Serial::RxIrq); // attach the two interrupt services
+    pc.attach(&pc_recv, Serial::RxIrq); // attach the two wifi interrupt services
     dev.attach(&dev_recv, Serial::RxIrq);
-    pc.printf("ok off we go....\n\r");
-//    wait(10);
-//    pc.printf("AT+RST\n\r");
-//    wait(20);
-//        pc.printf("AT+CWJAP="CWMWIFI","CWM2016TT""\n\r);
+    
+    //wifi setup
+    dev.printf("AT+RST\r\n");
+    wait(10);
+    dev.printf("AT+CWJAP=\"BTHub3-WXWX\",\"fdd6f7c682\"\r\n");
+    wait(10);
+    dev.printf("AT+CIPMUX=1\r\n");
+    wait(2);
+    dev.printf("AT+CIPSTART=2,\"TCP\",\"192.168.1.95\",333\r\n");
+    wait(2);
+
+    led3 = 0, led2 = 1, led1 = 1;
+
+    dev.attach(&safe);      // attach the flag interrupt sequences
+    push.rise(&activate);
 
     while(1) {
-//        (i++)%10; // THIS USED TO BE A SLEEP COMMAND BUT IT WAS CAUSING SOME TROUBLE.
+        if (stop == 0) {
+            volts = ain.read();
+            distance = volts*1000;        //distance /cm
+            wait(0.5);
+            if (distance > 50) {
+                timer = 0;
+                buzz = 0;
+                wait(0.2);
+            } else {
+                for( p = 0.0f; p < 0.4; p += 0.1) {       //Initial buzz to indicate proximity sensor has detected someone
+                    if(p<0.2) {
+                        buzz = 0.5;
+                        wait(0.1);
+                    } else {
+                        buzz = 0;
+                        wait(0.1);
+                    }
+                }
+                for( p = 0; p < 10; p++) {              //5s LED timer
+                    timer = !timer;
+                    wait(0.5);
+                }
+                if (stop ==0) {
+                    //dev.printf("AT+CIPSEND=2,9\r\n");
+                    //wait(0.05);
+                    //dev.printf("Alarm\n\r \n\r");
+                    //wait(0.05);
+                }
+                for( q = 0; q < 1000; q += 1) {       //Alarm
+                    if (stop == 0) {
+                        led1 = 0;
+                        led2 = 1, led3 = 1;
+                        for( p = 0.0f; p < 0.5; p += 0.1) {
+                            led1 = !led1;
+                            if(p<0.25) {
+                                buzz = 0.5;
+                                wait(0.05);
+                            } else {
+                                buzz = 0;
+                                wait(0.05);
+                            }
+                        }
+                    } else {
+                        buzz = 0, timer = 0;
+                        led1 = 1, led3 = 1;
+                        led2 = 0;
+                    }
+                }
+            }
+        } else {
+            buzz = 0;
+            timer = 0;
+        }
     }
 }
\ No newline at end of file