Components / ESP8266Interface

Socket interface for ESP8266. Implements the NetworkSocketAPI. Requires device to use the Espressif Firmware.

Dependencies:   ESP8266

Dependents:   ESP8266InterfaceTests HelloESP8266Interface

Fork of ESP8266Interface by NetworkSocketAPI

Note

This library assumes your ESP8266 is running the Espressif Firmware. For instructions on how to update your ESP8266 to use the correct firmware see the Firmware Update Wiki Page.

Currently the ESP8266Interface LIbrary has the following Abilities:

Working

  • TCP Client
  • UDP Client
  • Transparent mode (single connection of 1 type at a time)
  • Station Mode (connects to AP)

To be implimented

  • TCP Server
  • UDP Server
  • Multi Connection Mode (able to have up to 5 sockets at a time)
  • AP Mode (Make ESP Chip act like access point)
  • DNS Support (currently websites must be looked up by IP)
  • Error Recovery

Nice but not necessary

  • colorized text for ESP AT Commands in Command line (easier to differentiate from other text)

ESP8266Interface.cpp@27:eaeecaaae611, 2015-08-05 (annotated)

Committer:
sarahmarshy
Date:
Wed Aug 05 21:58:22 2015 +0000
Revision:
27:eaeecaaae611
Parent:
26:6e36dd3cec3f
Child:
28:6426873b21bd
DNS support revised. Timeouts set properly.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sarahmarshy 18:9fc7976c7b27 1 /* ESP8266Interface Example
sam_grove 11:288c15b80a26 2 * Copyright (c) 2015 ARM Limited
sam_grove 11:288c15b80a26 3 *
sam_grove 11:288c15b80a26 4 * Licensed under the Apache License, Version 2.0 (the "License");
sam_grove 11:288c15b80a26 5 * you may not use this file except in compliance with the License.
sam_grove 11:288c15b80a26 6 * You may obtain a copy of the License at
sam_grove 11:288c15b80a26 7 *
sam_grove 11:288c15b80a26 8 * http://www.apache.org/licenses/LICENSE-2.0
sam_grove 11:288c15b80a26 9 *
sam_grove 11:288c15b80a26 10 * Unless required by applicable law or agreed to in writing, software
sam_grove 11:288c15b80a26 11 * distributed under the License is distributed on an "AS IS" BASIS,
sam_grove 11:288c15b80a26 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
sam_grove 11:288c15b80a26 13 * See the License for the specific language governing permissions and
sam_grove 11:288c15b80a26 14 * limitations under the License.
sam_grove 11:288c15b80a26 15 */
sam_grove 24:37504440f296 16
sarahmarshy 18:9fc7976c7b27 17 #include "ESP8266Interface.h"
sam_grove 11:288c15b80a26 18
sam_grove 24:37504440f296 19 ESP8266Interface::ESP8266Interface(PinName tx, PinName rx) : esp8266(tx, rx)
sam_grove 11:288c15b80a26 20 {
sarahmarshy 22:312453862371 21 uuidCounter = 0;
sam_grove 24:37504440f296 22 std::fill_n(availableID, sizeof(availableID)/sizeof(int), -1);
sam_grove 11:288c15b80a26 23 }
sam_grove 11:288c15b80a26 24
sam_grove 24:37504440f296 25 int32_t ESP8266Interface::init(void)
sam_grove 24:37504440f296 26 {
sam_grove 24:37504440f296 27 if (!esp8266.startup()) {
sarahmarshy 18:9fc7976c7b27 28 return -1;
sam_grove 24:37504440f296 29 }
sam_grove 24:37504440f296 30 if (!esp8266.reset()) {
sarahmarshy 18:9fc7976c7b27 31 return -1;
sam_grove 24:37504440f296 32 }
sam_grove 24:37504440f296 33 if (!esp8266.wifiMode(3)) {
sarahmarshy 18:9fc7976c7b27 34 return -1;
sam_grove 24:37504440f296 35 }
sam_grove 24:37504440f296 36 if (!esp8266.multipleConnections(true)) {
sarahmarshy 18:9fc7976c7b27 37 return -1;
sam_grove 24:37504440f296 38 }
sarahmarshy 18:9fc7976c7b27 39 return 0;
sam_grove 11:288c15b80a26 40 }
sam_grove 11:288c15b80a26 41
sam_grove 24:37504440f296 42 int32_t ESP8266Interface::init(const char *ip, const char *mask, const char *gateway)
sam_grove 11:288c15b80a26 43 {
sarahmarshy 23:fd0f3197c30b 44 return -1;
sam_grove 11:288c15b80a26 45 }
sam_grove 11:288c15b80a26 46
sam_grove 24:37504440f296 47 int32_t ESP8266Interface::connect(uint32_t timeout_ms)
sam_grove 11:288c15b80a26 48 {
sam_grove 11:288c15b80a26 49 return -1;
sam_grove 11:288c15b80a26 50 }
sam_grove 11:288c15b80a26 51
sarahmarshy 18:9fc7976c7b27 52 int32_t ESP8266Interface::connect(const char *ap, const char *pass_phrase, wifi_security_t security, uint32_t timeout_ms)
sam_grove 11:288c15b80a26 53 {
sarahmarshy 23:fd0f3197c30b 54 esp8266.setTimeout(timeout_ms);
sam_grove 24:37504440f296 55 if (!esp8266.dhcp(1, true)) {
sarahmarshy 18:9fc7976c7b27 56 return -1;
sarahmarshy 18:9fc7976c7b27 57 }
sam_grove 24:37504440f296 58 if (!esp8266.connect(ap, pass_phrase)) {
sam_grove 24:37504440f296 59 return -1;
sam_grove 24:37504440f296 60 }
sam_grove 24:37504440f296 61 return 0;
sam_grove 11:288c15b80a26 62 }
sam_grove 11:288c15b80a26 63
sarahmarshy 22:312453862371 64 int32_t ESP8266Interface::disconnect(void)
sam_grove 11:288c15b80a26 65 {
sam_grove 24:37504440f296 66 if (!esp8266.disconnect()) {
sarahmarshy 22:312453862371 67 return -1;
sam_grove 24:37504440f296 68 }
sam_grove 24:37504440f296 69 for(int i=0; i<numSockets; i++) {
sarahmarshy 22:312453862371 70 SocketInterface *socket = sockets[availableID[i]];
sarahmarshy 22:312453862371 71 deallocateSocket(socket);
sarahmarshy 22:312453862371 72 }
sarahmarshy 22:312453862371 73 return 0;
sam_grove 11:288c15b80a26 74 }
sam_grove 11:288c15b80a26 75
sarahmarshy 18:9fc7976c7b27 76 char *ESP8266Interface::getIPAddress(void)
sarahmarshy 18:9fc7976c7b27 77 {
sam_grove 24:37504440f296 78 if(!esp8266.getIPAddress(ip)) {
sarahmarshy 18:9fc7976c7b27 79 return NULL;
sam_grove 24:37504440f296 80 }
sarahmarshy 18:9fc7976c7b27 81 return ip;
sarahmarshy 18:9fc7976c7b27 82 }
sarahmarshy 18:9fc7976c7b27 83
sarahmarshy 18:9fc7976c7b27 84 char *ESP8266Interface::getGateway(void) const
sam_grove 11:288c15b80a26 85 {
sam_grove 11:288c15b80a26 86 return 0;
sam_grove 11:288c15b80a26 87 }
sam_grove 11:288c15b80a26 88
sarahmarshy 18:9fc7976c7b27 89 char *ESP8266Interface::getNetworkMask(void) const
sam_grove 11:288c15b80a26 90 {
sam_grove 11:288c15b80a26 91 return 0;
sam_grove 11:288c15b80a26 92 }
sam_grove 11:288c15b80a26 93
sarahmarshy 18:9fc7976c7b27 94 char *ESP8266Interface::getMACAddress(void) const
sam_grove 11:288c15b80a26 95 {
sam_grove 11:288c15b80a26 96 return 0;
sam_grove 11:288c15b80a26 97 }
sam_grove 11:288c15b80a26 98
sam_grove 24:37504440f296 99 int32_t ESP8266Interface::isConnected(void)
sam_grove 11:288c15b80a26 100 {
sam_grove 24:37504440f296 101 return (getIPAddress() == NULL) ? -1 : 0;
sam_grove 11:288c15b80a26 102 }
sam_grove 11:288c15b80a26 103
sam_grove 24:37504440f296 104 SocketInterface *ESP8266Interface::allocateSocket(socket_protocol_t socketProtocol)
sam_grove 24:37504440f296 105 {
sarahmarshy 18:9fc7976c7b27 106 int id = -1;
sarahmarshy 18:9fc7976c7b27 107 //Look through the array of available sockets for an unused ID
sam_grove 24:37504440f296 108 for(int i=0; i<numSockets; i++) {
sam_grove 24:37504440f296 109 if (availableID[i] == -1) {
sam_grove 24:37504440f296 110 id = i;
sarahmarshy 18:9fc7976c7b27 111 availableID[i] = uuidCounter;
sarahmarshy 18:9fc7976c7b27 112 break;
sarahmarshy 18:9fc7976c7b27 113 }
sarahmarshy 18:9fc7976c7b27 114 }
sam_grove 24:37504440f296 115 if (id == -1) {
sam_grove 24:37504440f296 116 return NULL;//tried to allocate more than the maximum 5 sockets
sarahmarshy 18:9fc7976c7b27 117 }
sam_grove 24:37504440f296 118 ESP8266Socket *socket = new ESP8266Socket(uuidCounter++, esp8266, socketProtocol, (uint8_t)id);
sarahmarshy 22:312453862371 119 sockets[socket->getHandle()] = socket;
sarahmarshy 18:9fc7976c7b27 120 return socket;
sam_grove 11:288c15b80a26 121 }
sam_grove 13:0186e9e35a24 122
sam_grove 24:37504440f296 123 int ESP8266Interface::deallocateSocket(SocketInterface *socket)
bridadan 16:b2f781416464 124 {
sarahmarshy 18:9fc7976c7b27 125 int id = (int)static_cast<ESP8266Socket*>(socket)->getID();
sarahmarshy 18:9fc7976c7b27 126 availableID[id] = -1;
sam_grove 24:37504440f296 127
sarahmarshy 22:312453862371 128 std::map<uint32_t, SocketInterface*>::iterator it;
sam_grove 24:37504440f296 129
sarahmarshy 22:312453862371 130 // Check if socket is owned by WiFiRadioInterface
sarahmarshy 22:312453862371 131 it = sockets.find(socket->getHandle());
sam_grove 24:37504440f296 132
sarahmarshy 22:312453862371 133 if (it != sockets.end()) {
sarahmarshy 22:312453862371 134 // If so, erase it from the internal socket map and deallocate the socket
sarahmarshy 22:312453862371 135 sockets.erase(it);
sarahmarshy 22:312453862371 136 delete socket;
sarahmarshy 22:312453862371 137 } else {
sarahmarshy 22:312453862371 138 // Socket is not owned by WiFiRadioInterface, so return -1 error
sarahmarshy 22:312453862371 139 return -1;
sarahmarshy 22:312453862371 140 }
sam_grove 24:37504440f296 141 return 0;
bridadan 16:b2f781416464 142 }
sarahmarshy 25:91c4e9d34b77 143 void ESP8266Interface::getHostByName(const char *name, char* hostIP)
sarahmarshy 25:91c4e9d34b77 144 {
sarahmarshy 25:91c4e9d34b77 145 SocketInterface* sock = this->allocateSocket(SOCK_UDP);
sarahmarshy 27:eaeecaaae611 146
sarahmarshy 25:91c4e9d34b77 147 DnsQuery dns(sock);
sarahmarshy 27:eaeecaaae611 148 printf("DNS look up starting\n");
sarahmarshy 27:eaeecaaae611 149 dns.gethostbyname(name, hostIP);
sarahmarshy 25:91c4e9d34b77 150 this->deallocateSocket(sock);
sarahmarshy 25:91c4e9d34b77 151 }
bridadan 16:b2f781416464 152
sam_grove 24:37504440f296 153 ESP8266Socket::ESP8266Socket(uint32_t handle, ESP8266 &driver, socket_protocol_t type, uint8_t id)
sarahmarshy 18:9fc7976c7b27 154 {
sarahmarshy 22:312453862371 155 _handle = handle;
sam_grove 24:37504440f296 156 _driver = &driver;
sam_grove 24:37504440f296 157 _type = type;
sam_grove 24:37504440f296 158 _id = id;
sarahmarshy 18:9fc7976c7b27 159 }
sarahmarshy 18:9fc7976c7b27 160
sarahmarshy 18:9fc7976c7b27 161 const char *ESP8266Socket::getHostByName(const char *name) const
sam_grove 13:0186e9e35a24 162 {
sam_grove 13:0186e9e35a24 163 return 0;
sam_grove 13:0186e9e35a24 164 }
sam_grove 13:0186e9e35a24 165
sarahmarshy 18:9fc7976c7b27 166 void ESP8266Socket::setAddress(const char* addr)
bridadan 16:b2f781416464 167 {
sam_grove 24:37504440f296 168 _addr = addr;
sarahmarshy 18:9fc7976c7b27 169 }
sarahmarshy 18:9fc7976c7b27 170
sam_grove 24:37504440f296 171 void ESP8266Socket::setPort(uint16_t port)
sarahmarshy 18:9fc7976c7b27 172 {
sam_grove 24:37504440f296 173 _port = port;
bridadan 16:b2f781416464 174 }
bridadan 16:b2f781416464 175
sarahmarshy 18:9fc7976c7b27 176 void ESP8266Socket::setAddressPort(const char* addr, uint16_t port)
bridadan 16:b2f781416464 177 {
sam_grove 24:37504440f296 178 _addr = addr;
sarahmarshy 18:9fc7976c7b27 179 _port = port;
bridadan 16:b2f781416464 180 }
bridadan 16:b2f781416464 181
sarahmarshy 18:9fc7976c7b27 182 const char *ESP8266Socket::getAddress(void) const
sarahmarshy 18:9fc7976c7b27 183 {
sam_grove 24:37504440f296 184 return _addr;
sarahmarshy 18:9fc7976c7b27 185 }
sarahmarshy 18:9fc7976c7b27 186
sarahmarshy 18:9fc7976c7b27 187 uint16_t ESP8266Socket::getPort(void) const
sarahmarshy 18:9fc7976c7b27 188 {
sarahmarshy 18:9fc7976c7b27 189 return _port;
sarahmarshy 18:9fc7976c7b27 190 }
sarahmarshy 18:9fc7976c7b27 191
sarahmarshy 18:9fc7976c7b27 192
sarahmarshy 18:9fc7976c7b27 193 int32_t ESP8266Socket::bind(uint16_t port) const
sam_grove 13:0186e9e35a24 194 {
sam_grove 13:0186e9e35a24 195 return -1;
sam_grove 13:0186e9e35a24 196 }
sam_grove 13:0186e9e35a24 197
sarahmarshy 18:9fc7976c7b27 198 int32_t ESP8266Socket::listen(void) const
sam_grove 13:0186e9e35a24 199 {
sam_grove 13:0186e9e35a24 200 return -1;
sam_grove 13:0186e9e35a24 201 }
sam_grove 13:0186e9e35a24 202
sarahmarshy 18:9fc7976c7b27 203 int32_t ESP8266Socket::accept() const
sam_grove 13:0186e9e35a24 204 {
sam_grove 13:0186e9e35a24 205 return -1;
sam_grove 13:0186e9e35a24 206 }
sam_grove 13:0186e9e35a24 207
sam_grove 24:37504440f296 208 int32_t ESP8266Socket::open()
sam_grove 13:0186e9e35a24 209 {
sarahmarshy 26:6e36dd3cec3f 210
sam_grove 24:37504440f296 211 string sock_type = (SOCK_UDP == _type) ? "UDP" : "TCP";
sam_grove 24:37504440f296 212 if (!_driver->openSocket(sock_type, _id, _port, _addr)) {
sam_grove 24:37504440f296 213 return -1;
sarahmarshy 18:9fc7976c7b27 214 }
sam_grove 13:0186e9e35a24 215 return 0;
sam_grove 24:37504440f296 216
sam_grove 13:0186e9e35a24 217 }
sam_grove 13:0186e9e35a24 218
sam_grove 24:37504440f296 219 int32_t ESP8266Socket::send(const void *data, uint32_t amount, uint32_t timeout_ms)
bridadan 16:b2f781416464 220 {
sam_grove 24:37504440f296 221 _driver->setTimeout((int)timeout_ms);
sam_grove 24:37504440f296 222 if(!_driver->sendData(_id, data, amount)) {
sarahmarshy 18:9fc7976c7b27 223 return -1;
sarahmarshy 18:9fc7976c7b27 224 }
bridadan 16:b2f781416464 225 return 0;
bridadan 16:b2f781416464 226 }
bridadan 16:b2f781416464 227
sarahmarshy 18:9fc7976c7b27 228 uint32_t ESP8266Socket::recv(void *data, uint32_t amount, uint32_t timeout_ms)
sam_grove 13:0186e9e35a24 229 {
sarahmarshy 27:eaeecaaae611 230 _driver->setTimeout((int)timeout_ms);
sam_grove 24:37504440f296 231 return _driver->recv(data, amount);
sam_grove 13:0186e9e35a24 232 }
sam_grove 13:0186e9e35a24 233
sarahmarshy 18:9fc7976c7b27 234 int32_t ESP8266Socket::close() const
sam_grove 13:0186e9e35a24 235 {
sam_grove 24:37504440f296 236 if (!_driver->close(_id)) {
sarahmarshy 23:fd0f3197c30b 237 return -1;//closing socket not succesful
sarahmarshy 18:9fc7976c7b27 238 }
sam_grove 13:0186e9e35a24 239 return 0;
sam_grove 13:0186e9e35a24 240 }
sarahmarshy 22:312453862371 241
sarahmarshy 22:312453862371 242 uint32_t ESP8266Socket::getHandle()const
sarahmarshy 22:312453862371 243 {
sarahmarshy 22:312453862371 244 return _handle;
sarahmarshy 22:312453862371 245 }
sarahmarshy 22:312453862371 246
sarahmarshy 18:9fc7976c7b27 247 uint8_t ESP8266Socket::getID()
sam_grove 13:0186e9e35a24 248 {
sam_grove 24:37504440f296 249 return _id;
sarahmarshy 25:91c4e9d34b77 250 }