File content as of revision 0:e58f27687450:

#include "ESP8266.h"

// Constructor
ESP8266::ESP8266(PinName tx, PinName rx) : comm(tx, rx) {
    comm.baud(115200);
}

// 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;
}

// 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
void 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);
}

// 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);
}