Diff: ESP8266/ESP8266.cpp

Revision:

0:2ae429a5b336

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ESP8266/ESP8266.cpp	Thu Dec 15 08:05:18 2016 +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);
+}
+    
+    
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