File content as of revision 19:783c46b13285:

/* ESP8266Interface Example
 * Copyright (c) 2015 ARM Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
#include "ESP8266Interface.h"
#include <string>

ESP8266Interface::ESP8266Interface(PinName tx, PinName rx)
: serial(tx, rx), atParser(&serial)
{
    serial.baud(115200);
    availableID = new int[5];
    for(int i = 0; i<4; i++){
        availableID[i] = -1;
    }
}

ESP8266Interface::ESP8266Interface(PinName tx, PinName rx, const char *ap, const char *pass_phrase, wifi_security_t security, uint32_t timeout_ms)
: serial(tx, rx), atParser(&serial)
{

}

int32_t ESP8266Interface::init(void) 
{   
    if (!(atParser.send("AT") && atParser.recv("OK")))
        return -1;
    if (!(atParser.send("AT+RST") && atParser.recv("OK\r\nready")))
        return -1;
    if (!(atParser.send("AT+CWMODE=3") && atParser.recv("OK")))
        return -1;
    if (!(atParser.send("AT+CIPMUX=1") && atParser.recv("OK")))
        return -1;
    return 0;
    
}

int32_t ESP8266Interface::init(const char *ip, const char *mask, const char *gateway) 
{
    return -1;
}

int32_t ESP8266Interface::connect(uint32_t timeout_ms) 
{
    return -1;
}

int32_t ESP8266Interface::connect(const char *ap, const char *pass_phrase, wifi_security_t security, uint32_t timeout_ms)
{
    if (!(atParser.send("AT+CWDHCP=2,1") && atParser.recv("OK")))
        return -1;
    string connect_command = "AT+CWJAP=\""+(string)ap+"\",\""+(string)pass_phrase+"\"";
    atParser.setTimeout(10000);
    if (!(atParser.send(connect_command.c_str()) && atParser.recv("OK"))){
        return -1;
    }
    return 0;    
}

int32_t ESP8266Interface::disconnect(void) const
{
    return -1;
}

char *ESP8266Interface::getIPAddress(void)
{
    char* ip;
    if (!(atParser.send("AT+CIPSTA?") && atParser.recv("+CIPSTA:\"%s\"\r\nOK", ip)))
        return NULL;
    return ip;
}

char *ESP8266Interface::getGateway(void) const
{
    return 0;
}

char *ESP8266Interface::getNetworkMask(void) const
{
    return 0;
}

char *ESP8266Interface::getMACAddress(void) const
{
    return 0;
}

int32_t ESP8266Interface::isConnected(void) 
{
    return (getIPAddress()==NULL) ? -1 : 0;
}

SocketInterface *ESP8266Interface::allocateSocket(socket_protocol_t socketProtocol) 
{   
    int id = -1;
    uuidCounter += 1;
    //Look through the array of available sockets for an unused ID
    for(int i=0; i<sizeof(availableID); i++){
        if (availableID[i] == -1){
            id = i;   
            availableID[i] = uuidCounter;
            break;
        }
    }
    if (id == -1){
        return NULL;//tried  to allocate more than the maximum 5 sockets   
    }
    ESP8266Socket *socket = new ESP8266Socket(uuidCounter, &atParser, socketProtocol, (uint8_t)id);
    return socket;
}

int ESP8266Interface::deallocateSocket(SocketInterface *socket) 
{
    int id = (int)static_cast<ESP8266Socket*>(socket)->getID();
    availableID[id] = -1;
    return id;
}

ESP8266Socket::ESP8266Socket(uint32_t handle, ATParser *atParser, socket_protocol_t type, uint8_t id)
: _handle(handle), atParser(atParser), _id(id)
{
    SocketInterface::_type = type;
}

const char *ESP8266Socket::getHostByName(const char *name) const
{
    return 0;
}

void ESP8266Socket::setAddress(const char* addr)
{
    _addr = (char*)addr;
}

void ESP8266Socket::setPort(uint16_t port) 
{
     _port = port;
}

void ESP8266Socket::setAddressPort(const char* addr, uint16_t port)
{
    _addr = (char*)addr;
    _port = port;
}

const char *ESP8266Socket::getAddress(void) const
{
    return (const char*)_addr;
}

uint16_t ESP8266Socket::getPort(void) const
{
    return _port;
}


int32_t ESP8266Socket::bind(uint16_t port) const
{
    return -1;
}

int32_t ESP8266Socket::listen(void) const
{
    return -1;
}

int32_t ESP8266Socket::accept() const
{
    return -1;
}

int32_t ESP8266Socket::open() 
{
    char portstr[5];
    char idstr[2];
    sprintf(idstr,"%d",_id);
    sprintf(portstr, "%d", _port);

    string sock_type;
    if(_type == SOCK_UDP)
        sock_type = "UDP";
    else if(_type == SOCK_TCP)
        sock_type = "TCP";
    string start_command = "AT+CIPSTART="+(string)idstr+",\""+sock_type+"\",\""+(string)_addr+"\","+(string)portstr;
    if (!(atParser->send(start_command.c_str()) && atParser->recv("OK"))){
        return -1;//opening socket not succesful
    }
    return 0;
        
}

int32_t ESP8266Socket::send(const void *data, uint32_t amount, uint32_t timeout_ms) 
{
    char idstr[2];
    sprintf(idstr,"%d",_id);
    char lenstr[5];
    sprintf(lenstr,"%d",(int)amount);
    
    atParser->setTimeout((int)timeout_ms);
    
    string send_command = "AT+CIPSEND="+(string)idstr+","+(string)lenstr;
    if(!atParser->send(send_command.c_str())){ 
        return -1;
    }
    atParser->write((char*)data, (int)amount);
    return 0;
}

uint32_t ESP8266Socket::recv(void *data, uint32_t amount, uint32_t timeout_ms)
{
    atParser->setTimeout((int)timeout_ms);
    int length;
    int id;
    if (!(atParser->recv("+IPD,%d,%d:", &id, &length) && 
      atParser->read((char*)data, length) &&
      atParser->recv("OK"))){  
        return false;
    }
    return length;   
}

int32_t ESP8266Socket::close() const
{
    char idstr[2];
    sprintf(idstr,"%d",_id);
    string close_command = "AT+CIPCLOSE="+(string)idstr;  
    
    if (!(atParser->send(close_command.c_str()) && atParser->recv("OK"))){
        return -1;//opening socket not succesful
    }
    return 0;
}
uint8_t ESP8266Socket::getID()
{
    return _id;   
}