File content as of revision 1:fe195c33f794:

#include "mbed.h"
#include <string>
#include <list>

#include <mpr121.h> 
 
Serial pc(USBTX, USBRX);
Serial esp(p28, p27); // tx, rx
Timer t;
Timer t1;
Timer t2;
DigitalOut led1(LED1);
DigitalOut led2(LED2);
DigitalOut led3(LED3);
DigitalOut led4(LED4);

// Create the interrupt receiver object on pin 26
InterruptIn interrupt(p26);

// Setup the i2c bus on pins 28 and 27
I2C i2c(p9, p10);

// Setup the Mpr121:
// constructor(i2c object, i2c address of the mpr121)
Mpr121 mpr121(&i2c, Mpr121::ADD_VSS);
 
int  count,ended,timeout;
char buf[2024];
char snd[1024];
 
char ssid[32] = "TooManyCooks-2.4";     // enter WiFi router ssid inside the quotes
char pwd [32] = "Lewislovers"; // enter WiFi router password inside the quotes

int hold0,hold1,hold2,hold3 = 0;
int signal = 0;
 
void SendCMD(),getreply(),ESPconfig(),ESPsetbaudrate();
 void dev_recv()
{
    led1 = !led1;
    while(esp.readable()) {
        pc.putc(esp.getc());
    }
}
 
void pc_recv()
{
    led4 = !led4;
    while(pc.readable()) {
        esp.putc(pc.getc());
    }
}

void fallInterrupt() { //code = 4180
    int key_code=0;
    int i=0;
    int value=mpr121.read(0x00);
    value +=mpr121.read(0x01)<<8;
    // LED demo mod by J. Hamblen
    //pc.printf("MPR value: %x \r\n", value);
    i=0;
    // puts key number out to LEDs for demo
    for (i=0; i<12; i++) {
        if (((value>>i)&0x01)==1) key_code=i+1;
        }
         if ((key_code ==5) && (hold0 == 0) && (hold1 == 0)&& (hold2 == 0) && (hold3 == 0)){
            hold0 =1;}
        if ((key_code ==2) && (hold0 == 1) && (hold1 == 0)&& (hold2 == 0) && (hold3 == 0)){
            hold1 =1;}
        if ((key_code ==9) && (hold0 == 1) && (hold1 == 1)&& (hold2 == 0) && (hold3 == 0)){
            hold2 =1;}
        if ((key_code ==1) && (hold0 == 1) && (hold1 == 1)&& (hold2 == 1) && (hold3 == 0)){
            hold3 =1;}
        if ((hold0 == 1) && (hold1 == 1)&& (hold2 == 1) && (hold3 == 1)) {
            signal = 1; 
        }
}
 
 
 
int main()
{
    //reset=0; //hardware reset for 8266
    pc.baud(9600);  // set what you want here depending on your terminal program speed
    pc.printf("\f\n\r-------------ESP8266 Hardware Reset-------------\n\r");
    wait(0.5);
    //reset=1;
    timeout=2;
    getreply();
 
    esp.baud(9600);   // change this to the new ESP8266 baudrate if it is changed at any time.
 
    //ESPsetbaudrate();   //******************  include this routine to set a different ESP8266 baudrate  ******************
 
    ESPconfig();        //******************  include Config to set the ESP8266 configuration  ***********************
 
 
 
    pc.attach(&pc_recv, Serial::RxIrq);
    esp.attach(&dev_recv, Serial::RxIrq);
    
    // continuosly get AP list and IP
    while(1) {
        sleep();
    }
 
}
 
// Sets new ESP8266 baurate, change the esp.baud(xxxxx) to match your new setting once this has been executed
void ESPsetbaudrate()
{
    strcpy(snd, "AT+CIOBAUD=9600\r\n");   // change the numeric value to the required baudrate
    SendCMD();
}
 
//  +++++++++++++++++++++++++++++++++ This is for ESP8266 config only, run this once to set up the ESP8266 +++++++++++++++
void ESPconfig()
{

    wait(5);
    pc.printf("\f---------- Starting ESP Config ----------\r\n\n");
        strcpy(snd,".\r\n.\r\n");
    SendCMD();
        wait(1);
    pc.printf("---------- Reset & get Firmware ----------\r\n");
    strcpy(snd,"node.restart()\r\n");
    SendCMD();
    timeout=5;
    getreply();
    pc.printf(buf);
 
    wait(2);
 
    pc.printf("\n---------- Get Version ----------\r\n");
    strcpy(snd,"print(node.info())\r\n");
    SendCMD();
    timeout=4;
    getreply();
    pc.printf(buf);
 
    wait(3);
 
    // set CWMODE to 1=Station,2=AP,3=BOTH, default mode 1 (Station)
    pc.printf("\n---------- Setting Mode ----------\r\n");
    strcpy(snd, "wifi.setmode(wifi.STATION)\r\n");
    SendCMD();
    timeout=4;
    getreply();
    pc.printf(buf);
 
    wait(2);
 
   
 
    pc.printf("\n---------- Listing Access Points ----------\r\n");
    strcpy(snd, "function listap(t)\r\n");
        SendCMD();
        wait(1);
        strcpy(snd, "for k,v in pairs(t) do\r\n");
        SendCMD();
        wait(1);
        strcpy(snd, "print(k..\" : \"..v)\r\n");
        SendCMD();
        wait(1);
        strcpy(snd, "end\r\n");
        SendCMD();
        wait(1);
        strcpy(snd, "end\r\n");
        SendCMD();
        wait(1);
        strcpy(snd, "wifi.sta.getap(listap)\r\n");
    SendCMD();
    wait(1);
        timeout=15;
    getreply();
    pc.printf(buf);
 
    wait(2);
 
    pc.printf("\n---------- Connecting to AP ----------\r\n");
    pc.printf("ssid = %s   pwd = %s\r\n",ssid,pwd);
    strcpy(snd, "wifi.sta.config(\"");
    strcat(snd, ssid);
    strcat(snd, "\",\"");
    strcat(snd, pwd);
    strcat(snd, "\")\r\n");
    SendCMD();
    timeout=10;
    getreply();
    pc.printf(buf);
 
    wait(5);
 
    pc.printf("\n---------- Get IP's ----------\r\n");
    strcpy(snd, "print(wifi.sta.getip())\r\n");
    SendCMD();
    timeout=3;
    getreply();
    pc.printf(buf);
 
    wait(1);
 
    pc.printf("\n---------- Get Connection Status ----------\r\n");
    strcpy(snd, "print(wifi.sta.status())\r\n");
    SendCMD();
    timeout=5;
    getreply();
    pc.printf(buf);
 
    pc.printf("\n\n\n  If you get a valid (non zero) IP, ESP8266 has been set up.\r\n");
    pc.printf("  Run this if you want to reconfig the ESP8266 at any time.\r\n");
    pc.printf("  It saves the SSID and password settings internally\r\n");
    wait(10);
        
        
          pc.printf("\n---------- Setting up http server ----------\r\n");
    strcpy(snd, "srv=net.createServer(net.TCP)\r\n");
        SendCMD();
        wait(1);
        strcpy(snd, "srv:listen(80,function(conn)\r\n");
        SendCMD();
        wait(1);
        strcpy(snd, "conn:on(\"receive\",function(conn,payload)\r\n");
        SendCMD();
        wait(1);
        strcpy(snd, "print(payload)\r\n");
        SendCMD();
        wait(1);
        
        strcpy(snd, "conn:send(\"<!DOCTYPE html>\")\r\n");
        SendCMD();
      wait(1);
        
        strcpy(snd, "conn:send(\"<html>\")\r\n");
        SendCMD();
      wait(1);
        
        strcpy(snd, "conn:send(\"<h1> Password Test</h1>\")\r\n");
      SendCMD();
        wait(1);
        
             //the good stuff              
             interrupt.fall(&fallInterrupt);
            interrupt.mode(PullUp);
       
             pc.printf("ENTER YOUR PASSWORD IN THE NEXT 10 SECONDS!!");
            wait(10);
        
            if (signal ==1){
                led1 = 1;
            strcpy(snd, "conn:send(\"<h1> UNLOCKED!.</h1>\")\r\n");
              SendCMD();
            }
            else {
                strcpy(snd, "conn:send(\"<h1> REJECTED!.</h1>\")\r\n");
              SendCMD();
            }
    
        
        strcpy(snd, "conn:send(\"</html>\")\r\n");
    SendCMD();
    wait(1);
        
        strcpy(snd, "end)\r\n");
    SendCMD();
    wait(1);
        
        strcpy(snd, "conn:on(\"sent\",function(conn) conn:close() end)\r\n");
    SendCMD();
    wait(1);
        strcpy(snd, "end)\r\n");
    SendCMD();
    wait(1);
        timeout=17;
    getreply();
    pc.printf(buf);
        pc.printf("\r\nDONE");
}
 
void SendCMD()
{
    esp.printf("%s", snd);
}
 
void getreply()
{
    memset(buf, '\0', sizeof(buf));
    t.start();
    ended=0;
    count=0;
    while(!ended) {
        if(esp.readable()) {
            buf[count] = esp.getc();
            count++;
        }
        if(t.read() > timeout) {
            ended = 1;
            t.stop();
            t.reset();
        }
    }
}