Revision 0:b2db5e8bd926, committed 2020-04-29

Comitter:

sahilkasana

Date:

Wed Apr 29 00:17:28 2020 +0000

Commit message:

smart parking system using ESP-8266 Wi-Fi module with Thingspeak.; Infrared sensors are used in the project along with servo motor.

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ESP8266/ESP8266.cpp	Wed Apr 29 00:17:28 2020 +0000
@@ -0,0 +1,202 @@
+#include "ESP8266.h"
+#define HTTPCMD "GET "
+#define protocol " HTTP/1.0\n\n"
+
+
+// Constructor
+ESP8266::ESP8266(PinName tx, PinName rx, int br) : comm(tx, rx) {
+    comm.baud(br);
+}
+
+// Destructor
+ESP8266::~ESP8266() { }
+
+// Add <CR> + <LF> at the end of the string
+void ESP8266::AddEOL(char * s) {
+    char k;
+    k = strlen(s); // Finds position of NULL character
+    s[k] = 0x0D; // switch NULL for <CR>
+    s[k + 1] = 0x0A; // Add <LF>
+    s[k + 2] = 0; // Add NULL at the end
+}
+
+// Add one ASCII character at the end of the string
+void ESP8266::AddChar(char * s, char c) {
+    char k;
+    k = strlen(s);
+    s[k] = c;
+    s[k + 1] = 0;
+}
+
+// Converts integer number to null-terminated string
+void ESP8266::itoa(int n, char * s) {
+    char k = 0;
+    char r[11];
+    
+    if(n == 0) {
+        s[0] = '0';
+        s[1] = 0;
+    } else {
+        while(n != 0) {
+            r[k]= (n % 10) + '0';
+            n = n / 10;
+            k++;
+        }
+        while(k > 0) {
+            s[n] = r[k - 1] + '0';
+            n++;
+            k--;
+        }
+        s[n] = 0;
+    }
+}
+
+// Sends command to ESP8266. Receives the command string
+void ESP8266::SendCMD(char * s) {
+    AddEOL(s);
+    comm.printf("%s", s);
+}
+
+// Resets the ESP8266
+void ESP8266::Reset(void) {
+    char rs[10];
+    strcpy(rs, "AT+RST");
+    SendCMD(rs);
+}
+
+// Receive reply until no character is received after a given timeout in miliseconds
+bool ESP8266::RcvReply(char * r, int to) {
+    Timer t;
+    bool ended = 0;
+    char c;
+    
+    strcpy(r, "");
+    t.start();
+    while(!ended) {
+        if(comm.readable()) {
+            c = comm.getc();
+            AddChar(r, c);
+            t.start();
+        }
+        if(t.read_ms() > to) {
+                ended = 1;
+        }
+    }
+    AddChar(r, 0x00);
+    return ended;
+}
+
+// Gets the AP list. Parameter: the string to receive the list
+void ESP8266::GetList(char * l) {
+    char rs[15];
+    strcpy(rs, "AT+CWLAP");
+    SendCMD(rs);
+    RcvReply(l, 5000); // Needs big timeout because it takes long to start replying
+}
+
+// Joins a Wifi AP. Parameters: SSID and Password (strings)
+void ESP8266::Join(char * id, char * pwd) {
+    char cmd[255];
+    strcpy(cmd, "AT+CWJAP=");
+    AddChar(cmd, 0x22);
+    strcat(cmd, id);
+    AddChar(cmd, 0x22);
+    AddChar(cmd, 0x2C);
+    AddChar(cmd, 0x22);
+    strcat(cmd, pwd);
+    AddChar(cmd, 0x22);
+    SendCMD(cmd);
+}
+
+// Gets ESP IP. Parameter: string to contain IP
+void ESP8266::GetIP(char * ip) {
+    char cmd[15];
+    strcpy(cmd, "AT+CIFSR");
+    SendCMD(cmd);
+    RcvReply(ip, 2000);
+}
+
+//Defines wifi mode; Parameter: mode; 1= STA, 2= AP, 3=both
+void ESP8266::SetMode(char mode) {
+    char cmd[15];
+    strcpy(cmd, "AT+CWMODE=");
+    mode = mode + 0x30; // Converts number into corresponding ASCII character
+    AddChar(cmd, mode); // Completes command string
+    SendCMD(cmd);
+}
+
+// Quits the AP
+void ESP8266::Quit(void) {
+    char cmd[15];
+    strcpy(cmd, "AT+CWQAP");
+    SendCMD(cmd);
+}
+
+// Sets single connection
+void ESP8266::SetSingle(void) {
+    char cmd[15];
+    strcpy(cmd, "AT+CIPMUX=0");
+    SendCMD(cmd);
+}
+
+// Sets multiple connection
+void ESP8266::SetMultiple(void) {
+    char rs[15];
+    strcpy(rs, "AT+CIPMUX=1");
+    SendCMD(rs);
+}
+
+// Gets connection status. Parameter: string to contain status
+void ESP8266::GetConnStatus(char * st) {
+    char cmd[15];
+    strcpy(cmd, "AT+CIPSTATUS");
+    SendCMD(cmd);
+    RcvReply(st, 2000);
+}
+
+// Starts server mode. Parameter: port to be used
+void ESP8266::StartServerMode(int port) {
+    char rs[25];
+    char t[4];
+    strcpy(rs, "AT+CIPSERVER=1,");
+    itoa(port, t);
+    strcat(rs, t);
+    SendCMD(rs);
+}
+
+// Close server mode.
+void ESP8266::CloseServerMode(void) {
+    char rs[20];
+    strcpy(rs, "AT+CIPSERVER=0");
+    SendCMD(rs);
+}
+
+void ESP8266::setTransparent(void){
+    char rs[20];
+    strcpy(rs, "AT+CIPMODE=0");
+    SendCMD(rs);
+}
+
+void ESP8266::startTCPConn(char *IP, int port){
+    char rs[100];
+    sprintf(rs, "AT+CIPSTART=\"TCP\",\"%s\",%d", IP, port);
+    SendCMD(rs);
+}
+
+void ESP8266::sendURL(char *URL, char *command){
+    char url[300], snd[300], http_cmd[300];
+    
+    strcpy(http_cmd, HTTPCMD);
+    
+    strcat(http_cmd, URL);
+    strcat(http_cmd, protocol);
+    
+    strcpy(url, http_cmd);
+    sprintf(snd,"AT+CIPSENDEX=%d",strlen(url));
+    strcpy(command, url);
+    SendCMD(snd);
+    wait(3);
+    SendCMD(url);
+}
+    
+    
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ESP8266/ESP8266.h	Wed Apr 29 00:17:28 2020 +0000
@@ -0,0 +1,70 @@
+#ifndef ESP8266_H
+#define ESP8266_H
+
+#include <string>
+#include "mbed.h"
+
+class ESP8266
+{
+public:
+/**
+  * ESP8266 constructor
+  *
+  * @param tx TX pin
+  * @param rx RX pin
+  * @param br Baud Rate
+  */
+  ESP8266(PinName tx, PinName rx, int br);
+
+  /**
+  * ESP8266 destructor
+  */
+  ~ESP8266();
+
+void SendCMD(char * s);
+void Reset(void);
+bool RcvReply(char * r, int to);
+void GetList(char * l);
+void Join(char * id, char * pwd);
+void GetIP(char * ip);
+void SetMode(char mode);
+void Quit(void);
+void SetSingle(void);
+void SetMultiple(void);
+void GetConnStatus(char * st);
+void StartServerMode(int port);
+void CloseServerMode(void);
+void setTransparent(void);
+void startTCPConn(char * IP, int port);
+void sendURL(char *URL, char *command);
+
+private:
+Serial comm;
+void AddEOL(char * s);
+void AddChar(char * s, char c);
+void itoa(int c, char s[]);
+
+};
+  
+#endif
+/*
+    COMMAND TABLE
+    Basic:
+    AT: Just to generate "OK" reply
+    Wifi:
+    AT+RST:  restart the module
+    AT+CWMODE: define wifi mode; AT+CWMODE=<mode> 1= Sta, 2= AP, 3=both; Inquiry: AT+CWMODE? or AT+CWMODE=?
+    AT+CWJAP: join the AP wifi; AT+ CWJAP =<ssid>,< pwd > - ssid = ssid, pwd = wifi password, both between quotes; Inquiry: AT+ CWJAP?
+    AT+CWLAP: list the AP wifi
+    AT+CWQAP: quit the AP wifi; Inquiry: AT+CWQAP=?  
+    * AT+CWSAP: set the parameters of AP; AT+CWSAP= <ssid>,<pwd>,<chl>,<ecn> - ssid, pwd, chl = channel, ecn = encryption; Inquiry: AT+CWJAP?
+    TCP/IP:
+    AT+CIPSTATUS: get the connection status
+    * AT+CIPSTART: set up TCP or UDP connection 1)single connection (+CIPMUX=0) AT+CIPSTART= <type>,<addr>,<port>; 2) multiple connection (+CIPMUX=1) AT+CIPSTART= <id><type>,<addr>, <port> - id = 0-4, type = TCP/UDP, addr = IP address, port= port; Inquiry: AT+CIPSTART=?
+    * AT+CIPSEND: send data; 1)single connection(+CIPMUX=0) AT+CIPSEND=<length>; 2) multiple connection (+CIPMUX=1) AT+CIPSEND= <id>,<length>; Inquiry: AT+CIPSEND=?
+    * AT+CIPCLOSE: close TCP or UDP connection; AT+CIPCLOSE=<id> or AT+CIPCLOSE; Inquiry: AT+CIPCLOSE=?
+    AT+CIFSR: Get IP address; Inquiry: AT+ CIFSR=?
+    AT+CIPMUX:  set mutiple connection; AT+ CIPMUX=<mode> - 0 for single connection 1 for mutiple connection; Inquiry: AT+CIPMUX?
+    AT+CIPSERVER: set as server; AT+ CIPSERVER= <mode>[,<port> ] - mode 0 to close server mode, mode 1 to open; port = port; Inquiry: AT+CIFSR=?
+    * +IPD: received data
+*/
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/FXOS8700Q.lib	Wed Apr 29 00:17:28 2020 +0000
@@ -0,0 +1,1 @@
+http://developer.mbed.org/teams/Freescale/code/FXOS8700Q/#aee7dea904e2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Servo.lib	Wed Apr 29 00:17:28 2020 +0000
@@ -0,0 +1,1 @@
+https://os.mbed.com/users/simon/code/Servo/#36b69a7ced07

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Apr 29 00:17:28 2020 +0000
@@ -0,0 +1,134 @@
+#include "mbed.h"
+#include "Servo.h"
+#include "ESP8266.h"
+#include "math.h"
+#define CloudIP "184.106.153.149"           //Raw IP Address of ThingSpeak Cloud Server
+
+DigitalOut RLed(LED1);                      //when Garage has no spot for parking
+DigitalOut GLed(LED2);                      //when Garage has spot available
+DigitalOut BLed(LED3);                      //Onboard Blue LED for Wifi Tx Indication
+
+ESP8266 wifi(PTC17, PTC16, 9600);         //Tx Pin:PTC17; Rx Pin:PTC17; Baud rate:115200
+DigitalIn  IR1(A0);
+DigitalIn IR2(A1);
+DigitalIn IR3(A2);
+DigitalIn GS(A3);
+Servo myservo(D7);
+void wifi_send(void);             //Connect and Push Data Channel to Cloud Server
+int f_out= 3;                      //variable to count for no of slots available
+int num = 0;
+int open = 1 ;
+char snd[255],rcv[1000];                    //snd: send command to ESP8266
+//rcv: receive response from ESP8266
+int main()
+{ 
+    printf("WELCOME TO PARKING SYSTEM\n\r");
+    printf("Cloud synchronization number : %d", num);
+    printf("Syncing Data with Cloud, Please Wait.\n\r");  
+    printf("Initial Setup\r\n");
+    wifi.SetMode(1);                        //Set ESP mode to 1
+    wifi.RcvReply(rcv, 1000);               //Receive a response from ESP
+    printf("%s\r", rcv);
+
+    printf("Conneting to WiFi\r\n");     //AP Setup Initialization
+    wifi.Join("Kuch Bhi Daal Do", "paiselagenge");   //wifi address details
+    wifi.RcvReply(rcv, 1000);
+    printf("%s\n", rcv);
+    wait(8);
+
+    wifi.GetIP(rcv);                        //Obtains an IP address from the AP
+
+    while (1) {
+        wifi_send();
+
+        RLed = 1;
+        GLed = 1;
+        BLed = 0;
+        wait(2.0f);
+    }
+}
+
+void wifi_send(void)
+{ 
+    while(num<1000000000000) {
+        num=num + 1;
+        
+        GLed=0;
+        BLed=1;
+
+        
+    
+        if(GS==0) {
+            printf("Car is available at parking entrance..checking for slot availability\n\r");
+            if(IR1==0 && IR2==0 && IR3==0) {
+                printf("Parking full try next garage..\n\r");
+                open=0;
+                RLed=0;
+                GLed=1;
+                f_out = 0;
+            } else if (IR1==0 && IR2==0 && IR3==1) {
+                printf(" 1 spot available at slot 3\n\r");
+                f_out = 1;
+            } else if (IR1==0 && IR2==1 && IR3==0) {
+                printf(" 1 spot avaialble at slot 2\n\r");
+                f_out = 1;
+            } else if (IR1==0 && IR2==1 && IR3==1) {
+                printf("Two spots available at slot 2 and 3\n\r");
+                f_out = 2;
+            } else if (IR1==1 && IR2==0 && IR3==0) {
+                printf("One spot available at slot 1\n\r");
+                f_out = 1;
+            } else if (IR1==1 && IR2==0 && IR3==1) {
+                printf("Two spot avaialble at slot 1 and 3\n\r");
+                f_out = 2;
+            } else if (IR1==1 && IR2==1 && IR3==0) {
+                printf("Two spot avaialble at slot 1 and 2\n\r");
+                f_out = 2;
+            } else if (IR1==1 && IR2==1 && IR3==1) {
+                printf("Garage Empty\n\r");
+                f_out = 3;
+            }
+          
+            if(open == 1) {
+                for(int i=0; i<100; i++) {
+                    myservo = i/100.0;
+                    wait(0.01);
+                }
+                for(int i=100; i>0; i--) {
+                    myservo = i/100.0;
+                    wait(0.01);
+                }
+            }
+            }
+             else
+                printf("No car to enter\n\r");
+
+            //Sending Data to the Cloud Server via ESP8266 WiFi Module
+            strcpy(snd,"AT+CIPMUX=0\n\r");        //AT+CIPMUX: Enabling Single Channel Mode
+            wifi.SendCMD(snd);
+            wait(1);
+            wifi.RcvReply(rcv, 1000);
+            wait(1);
+
+            sprintf(snd,"AT+CIPSTART=4,\"TCP\",\"%s\",80\n",CloudIP); //Establish TCP connection w/ Cloud Server
+            wait(1);
+            wifi.RcvReply(rcv, 1000);
+            wait(1);
+
+            strcpy(snd,"AT+CIPSEND=100\n\r");    //Set length of the data that will be sent
+            wifi.SendCMD(snd);
+            printf("%s\r", rcv);
+            wait(1);
+            wifi.RcvReply(rcv, 1000);
+            printf("%s\r", rcv);
+            wait(1);
+
+            //   Pushing the data to Cloud Server via API
+            sprintf(snd,"GET https://api.thingspeak.com/update?api_key=M2RJX3971TCLP0S7&field1=%d\n\r", f_out);
+            wifi.SendCMD(snd);
+            printf("%s\r",snd);
+            wait(1);
+            wifi.RcvReply(rcv, 1000);
+            printf("%s\r", rcv);
+        }
+    }

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os.lib	Wed Apr 29 00:17:28 2020 +0000
@@ -0,0 +1,1 @@
+https://os.mbed.com/teams/EL4121-Embedded-System/code/mbed-os/#b74591d5ab33