Steve Kim / ESP8266Interface

Added monitoring feature of ESP8266's UART

Dependents:   ESP8266_W7500_Example DualNetworkInterface-Basic

Fork of ESP8266Interface by ESP8266

ESP8266/ESP8266.cpp@20:d764237405c2, 2014-12-01 (annotated)

Committer:
michaeljkoster
Date:
Mon Dec 01 09:28:02 2014 +0000
Revision:
20:d764237405c2
Parent:
19:fb8d5bff2076
Child:
22:c4360e61486a
cleanup

Who changed what in which revision?

UserRevisionLine numberNew contents of line
samux 1:fb4494783863 1 /* Copyright (C) 2012 mbed.org, MIT License
samux 1:fb4494783863 2 *
samux 1:fb4494783863 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
samux 1:fb4494783863 4 * and associated documentation files (the "Software"), to deal in the Software without restriction,
samux 1:fb4494783863 5 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
samux 1:fb4494783863 6 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
samux 1:fb4494783863 7 * furnished to do so, subject to the following conditions:
samux 1:fb4494783863 8 *
samux 1:fb4494783863 9 * The above copyright notice and this permission notice shall be included in all copies or
samux 1:fb4494783863 10 * substantial portions of the Software.
samux 1:fb4494783863 11 *
samux 1:fb4494783863 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
samux 1:fb4494783863 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
samux 1:fb4494783863 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
samux 1:fb4494783863 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
samux 1:fb4494783863 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
samux 1:fb4494783863 17 */
samux 1:fb4494783863 18
samux 1:fb4494783863 19 #include "mbed.h"
michaeljkoster 13:41098c907200 20 #include "ESP8266.h"
michaeljkoster 16:3f0efaa57a12 21 #include "Endpoint.h"
samux 1:fb4494783863 22 #include <string>
samux 1:fb4494783863 23 #include <algorithm>
samux 1:fb4494783863 24
samux 1:fb4494783863 25 //Debug is disabled by default
screamer 10:131675c17372 26 #if (defined(DEBUG))
michaeljkoster 13:41098c907200 27 #define DBG(x, ...) std::printf("[ESP8266 : DBG]"x"\r\n", ##__VA_ARGS__);
michaeljkoster 13:41098c907200 28 #define WARN(x, ...) std::printf("[ESP8266 : WARN]"x"\r\n", ##__VA_ARGS__);
michaeljkoster 13:41098c907200 29 #define ERR(x, ...) std::printf("[ESP8266 : ERR]"x"\r\n", ##__VA_ARGS__);
samux 1:fb4494783863 30 #else
samux 1:fb4494783863 31 #define DBG(x, ...)
samux 1:fb4494783863 32 #define WARN(x, ...)
samux 1:fb4494783863 33 #define ERR(x, ...)
samux 1:fb4494783863 34 #endif
samux 1:fb4494783863 35
screamer 10:131675c17372 36 #if defined(DEBUG)
michaeljkoster 13:41098c907200 37 #define INFO(x, ...) printf("[ESP8266 : INFO]"x"\r\n", ##__VA_ARGS__);
samux 1:fb4494783863 38 #else
samux 1:fb4494783863 39 #define INFO(x, ...)
samux 1:fb4494783863 40 #endif
samux 1:fb4494783863 41
samux 1:fb4494783863 42 #define MAX_TRY_JOIN 3
samux 1:fb4494783863 43
michaeljkoster 12:c5f0eac67a8a 44 extern Serial pc;
michaeljkoster 12:c5f0eac67a8a 45
michaeljkoster 13:41098c907200 46 ESP8266 * ESP8266::inst;
samux 1:fb4494783863 47
michaeljkoster 13:41098c907200 48 ESP8266::ESP8266( PinName tx, PinName rx, PinName _reset, const char * ssid, const char * phrase ):
michaeljkoster 13:41098c907200 49 wifi(tx, rx), reset_pin(_reset), buf_ESP8266(256)
samux 1:fb4494783863 50 {
samux 1:fb4494783863 51 memset(&state, 0, sizeof(state));
samux 1:fb4494783863 52
samux 1:fb4494783863 53 // change all ' ' in '$' in the ssid and the passphrase
samux 1:fb4494783863 54 strcpy(this->ssid, ssid);
samux 1:fb4494783863 55 for (int i = 0; i < strlen(ssid); i++) {
samux 1:fb4494783863 56 if (this->ssid[i] == ' ')
samux 1:fb4494783863 57 this->ssid[i] = '$';
samux 1:fb4494783863 58 }
samux 1:fb4494783863 59 strcpy(this->phrase, phrase);
samux 1:fb4494783863 60 for (int i = 0; i < strlen(phrase); i++) {
samux 1:fb4494783863 61 if (this->phrase[i] == ' ')
samux 1:fb4494783863 62 this->phrase[i] = '$';
samux 1:fb4494783863 63 }
samux 1:fb4494783863 64
samux 1:fb4494783863 65 inst = this;
samux 1:fb4494783863 66 attach_rx(false);
michaeljkoster 16:3f0efaa57a12 67
michaeljkoster 16:3f0efaa57a12 68 wifi.baud(9600); // initial baud rate of the ESP8266
samux 1:fb4494783863 69 }
samux 1:fb4494783863 70
michaeljkoster 13:41098c907200 71 bool ESP8266::join()
samux 1:fb4494783863 72 {
michaeljkoster 16:3f0efaa57a12 73 string cmd="AT+CWJAP=\""+(string)this->ssid+"\",\""+(string)this->phrase+"\"";
michaeljkoster 16:3f0efaa57a12 74 if( sendCommand( cmd.c_str(), "OK", NULL, 10000) ){
michaeljkoster 16:3f0efaa57a12 75 // successfully joined the network
samux 1:fb4494783863 76 state.associated = true;
michaeljkoster 13:41098c907200 77 INFO("\r\nssid: %s\r\nphrase: %s\r\nsecurity: %s\r\n\r\n", this->ssid, this->phrase);
samux 1:fb4494783863 78 return true;
samux 1:fb4494783863 79 }
samux 1:fb4494783863 80 return false;
samux 1:fb4494783863 81 }
samux 1:fb4494783863 82
michaeljkoster 13:41098c907200 83 bool ESP8266::connect()
samux 1:fb4494783863 84 {
michaeljkoster 16:3f0efaa57a12 85 return true;
samux 1:fb4494783863 86 }
samux 1:fb4494783863 87
michaeljkoster 15:37a7a56a424f 88 bool ESP8266::is_connected()
michaeljkoster 15:37a7a56a424f 89 {
michaeljkoster 15:37a7a56a424f 90 return true;
michaeljkoster 15:37a7a56a424f 91 }
michaeljkoster 15:37a7a56a424f 92
michaeljkoster 16:3f0efaa57a12 93 bool ESP8266::startUDP(char* ip, int port){
michaeljkoster 17:d11fa4c3ac65 94 char portstr[5];
michaeljkoster 16:3f0efaa57a12 95 sprintf(portstr, "%d", port);
michaeljkoster 18:60422852e99c 96 sendCommand(( "AT+CIPSTART=\"UDP\",\"" + (string) ip + "\"," + (string) portstr ).c_str(), "OK", NULL, 10000);
michaeljkoster 16:3f0efaa57a12 97
michaeljkoster 17:d11fa4c3ac65 98 sendCommand("AT+CIPMODE=1", "OK", NULL, 1000);// go into transparent mode
michaeljkoster 17:d11fa4c3ac65 99 sendCommand("AT+CIPSEND", ">", NULL, 1000);// go into transparent mode
michaeljkoster 16:3f0efaa57a12 100
michaeljkoster 16:3f0efaa57a12 101 return true;
michaeljkoster 16:3f0efaa57a12 102 }
michaeljkoster 16:3f0efaa57a12 103
michaeljkoster 15:37a7a56a424f 104 bool ESP8266::close()
michaeljkoster 15:37a7a56a424f 105 {
michaeljkoster 17:d11fa4c3ac65 106 send("+++",3);
michaeljkoster 17:d11fa4c3ac65 107 wait(1);
michaeljkoster 16:3f0efaa57a12 108 sendCommand("AT+CIPCLOSE","OK", NULL, 10000);
michaeljkoster 15:37a7a56a424f 109 return true;
michaeljkoster 15:37a7a56a424f 110 }
michaeljkoster 15:37a7a56a424f 111
michaeljkoster 15:37a7a56a424f 112 bool ESP8266::disconnect()
michaeljkoster 15:37a7a56a424f 113 {
michaeljkoster 15:37a7a56a424f 114 // if already disconnected, return
michaeljkoster 15:37a7a56a424f 115 if (!state.associated)
michaeljkoster 15:37a7a56a424f 116 return true;
michaeljkoster 15:37a7a56a424f 117 // send command to quit AP
michaeljkoster 16:3f0efaa57a12 118 sendCommand("AT+CWQAP", "OK", NULL, 10000);
michaeljkoster 15:37a7a56a424f 119 state.associated = false;
michaeljkoster 15:37a7a56a424f 120 return true;
michaeljkoster 15:37a7a56a424f 121 }
michaeljkoster 15:37a7a56a424f 122
michaeljkoster 15:37a7a56a424f 123 char* ESP8266::getIPAddress()
michaeljkoster 15:37a7a56a424f 124 {
michaeljkoster 16:3f0efaa57a12 125 sendCommand("AT+CWLIF", "OK", NULL, 10000);
michaeljkoster 15:37a7a56a424f 126 return ipString;
michaeljkoster 15:37a7a56a424f 127 }
michaeljkoster 15:37a7a56a424f 128
michaeljkoster 13:41098c907200 129 bool ESP8266::gethostbyname(const char * host, char * ip)
samux 1:fb4494783863 130 {
samux 1:fb4494783863 131 string h = host;
samux 1:fb4494783863 132 int nb_digits = 0;
samux 1:fb4494783863 133
samux 1:fb4494783863 134 // no dns needed
samux 1:fb4494783863 135 int pos = h.find(".");
samux 1:fb4494783863 136 if (pos != string::npos) {
samux 1:fb4494783863 137 string sub = h.substr(0, h.find("."));
samux 1:fb4494783863 138 nb_digits = atoi(sub.c_str());
samux 1:fb4494783863 139 }
samux 1:fb4494783863 140 //printf("substrL %s\r\n", sub.c_str());
samux 1:fb4494783863 141 if (count(h.begin(), h.end(), '.') == 3 && nb_digits > 0) {
samux 1:fb4494783863 142 strcpy(ip, host);
michaeljkoster 13:41098c907200 143 return true;
samux 1:fb4494783863 144 }
samux 1:fb4494783863 145 else {
michaeljkoster 13:41098c907200 146 // dns needed, not currently available
michaeljkoster 13:41098c907200 147 return false;
michaeljkoster 13:41098c907200 148 }
michaeljkoster 13:41098c907200 149 }
samux 1:fb4494783863 150
michaeljkoster 13:41098c907200 151 void ESP8266::reset()
samux 1:fb4494783863 152 {
michaeljkoster 16:3f0efaa57a12 153 sendCommand("AT+RST", "ready", NULL, 10000);
michaeljkoster 16:3f0efaa57a12 154 /*
samux 1:fb4494783863 155 reset_pin = 0;
samux 1:fb4494783863 156 wait(0.2);
samux 1:fb4494783863 157 reset_pin = 1;
samux 1:fb4494783863 158 wait(0.2);
michaeljkoster 16:3f0efaa57a12 159 */
samux 1:fb4494783863 160 }
samux 1:fb4494783863 161
michaeljkoster 13:41098c907200 162 bool ESP8266::reboot()
samux 3:9aa05e19c62e 163 {
michaeljkoster 16:3f0efaa57a12 164 reset();
samux 3:9aa05e19c62e 165 return true;
samux 3:9aa05e19c62e 166 }
samux 3:9aa05e19c62e 167
michaeljkoster 15:37a7a56a424f 168 void ESP8266::handler_rx(void)
samux 1:fb4494783863 169 {
michaeljkoster 15:37a7a56a424f 170 //read characters
michaeljkoster 16:3f0efaa57a12 171 char c;
michaeljkoster 16:3f0efaa57a12 172 while (wifi.readable()){
michaeljkoster 16:3f0efaa57a12 173 c=wifi.getc();
michaeljkoster 16:3f0efaa57a12 174 buf_ESP8266.queue(c);
michaeljkoster 20:d764237405c2 175 pc.printf("%c",c); //debug echo
michaeljkoster 16:3f0efaa57a12 176 }
michaeljkoster 15:37a7a56a424f 177 }
michaeljkoster 15:37a7a56a424f 178
michaeljkoster 15:37a7a56a424f 179 void ESP8266::attach_rx(bool callback)
michaeljkoster 15:37a7a56a424f 180 {
michaeljkoster 15:37a7a56a424f 181 if (!callback)
michaeljkoster 15:37a7a56a424f 182 wifi.attach(NULL);
michaeljkoster 15:37a7a56a424f 183 else
michaeljkoster 15:37a7a56a424f 184 wifi.attach(this, &ESP8266::handler_rx);
samux 1:fb4494783863 185 }
samux 1:fb4494783863 186
michaeljkoster 13:41098c907200 187 int ESP8266::readable()
samux 1:fb4494783863 188 {
michaeljkoster 13:41098c907200 189 return buf_ESP8266.available();
samux 1:fb4494783863 190 }
samux 1:fb4494783863 191
michaeljkoster 13:41098c907200 192 int ESP8266::writeable()
samux 1:fb4494783863 193 {
samux 1:fb4494783863 194 return wifi.writeable();
samux 1:fb4494783863 195 }
samux 1:fb4494783863 196
michaeljkoster 13:41098c907200 197 char ESP8266::getc()
samux 1:fb4494783863 198 {
michaeljkoster 14:4d1128f72e00 199 char c=0;
michaeljkoster 13:41098c907200 200 while (!buf_ESP8266.available());
michaeljkoster 13:41098c907200 201 buf_ESP8266.dequeue(&c);
samux 1:fb4494783863 202 return c;
samux 1:fb4494783863 203 }
samux 1:fb4494783863 204
michaeljkoster 15:37a7a56a424f 205 int ESP8266::putc(char c)
samux 1:fb4494783863 206 {
michaeljkoster 20:d764237405c2 207 while (!wifi.writeable() || wifi.readable()); //wait for echoed command characters to be read first
michaeljkoster 15:37a7a56a424f 208 return wifi.putc(c);
samux 1:fb4494783863 209 }
samux 1:fb4494783863 210
michaeljkoster 15:37a7a56a424f 211 void ESP8266::flush()
samux 1:fb4494783863 212 {
michaeljkoster 15:37a7a56a424f 213 buf_ESP8266.flush();
samux 1:fb4494783863 214 }
samux 1:fb4494783863 215
michaeljkoster 16:3f0efaa57a12 216 int ESP8266::send(const char * buf, int len)
michaeljkoster 15:37a7a56a424f 217 {
michaeljkoster 18:60422852e99c 218
michaeljkoster 16:3f0efaa57a12 219 const char* bufptr=buf;
michaeljkoster 16:3f0efaa57a12 220 for(int i=0; i<len; i++){
michaeljkoster 17:d11fa4c3ac65 221 putc((int)*bufptr++);
michaeljkoster 18:60422852e99c 222 }
michaeljkoster 19:fb8d5bff2076 223 return len;
michaeljkoster 15:37a7a56a424f 224 }
samux 1:fb4494783863 225
michaeljkoster 16:3f0efaa57a12 226 bool ESP8266::sendCommand(const char * cmd, const char * ACK, char * res, int timeout)
samux 1:fb4494783863 227 {
samux 1:fb4494783863 228 char read;
samux 1:fb4494783863 229 size_t found = string::npos;
samux 1:fb4494783863 230 string checking;
samux 1:fb4494783863 231 Timer tmr;
samux 1:fb4494783863 232 int result = 0;
samux 1:fb4494783863 233
michaeljkoster 17:d11fa4c3ac65 234 //pc.printf("will send: %s\r\n",cmd);
samux 1:fb4494783863 235
michaeljkoster 17:d11fa4c3ac65 236 attach_rx(true);
samux 1:fb4494783863 237
samux 1:fb4494783863 238 //We flush the buffer
michaeljkoster 17:d11fa4c3ac65 239 while (readable())
michaeljkoster 17:d11fa4c3ac65 240 getc();
michaeljkoster 16:3f0efaa57a12 241
samux 1:fb4494783863 242 if (!ACK || !strcmp(ACK, "NO")) {
michaeljkoster 17:d11fa4c3ac65 243 for (int i = 0; i < strlen(cmd); i++){
michaeljkoster 16:3f0efaa57a12 244 result = (putc(cmd[i]) == cmd[i]) ? result + 1 : result;
michaeljkoster 20:d764237405c2 245 wait(.005); // prevents stuck recieve ready (?) need to let echoed character get read first
michaeljkoster 16:3f0efaa57a12 246 }
michaeljkoster 16:3f0efaa57a12 247 putc(13); //CR
michaeljkoster 20:d764237405c2 248 wait(.005); // wait for echo
michaeljkoster 16:3f0efaa57a12 249 putc(10); //LF
michaeljkoster 16:3f0efaa57a12 250
samux 1:fb4494783863 251 } else {
samux 1:fb4494783863 252 //We flush the buffer
michaeljkoster 17:d11fa4c3ac65 253 while (readable())
michaeljkoster 17:d11fa4c3ac65 254 getc();
samux 1:fb4494783863 255
samux 1:fb4494783863 256 tmr.start();
michaeljkoster 17:d11fa4c3ac65 257 for (int i = 0; i < strlen(cmd); i++){
michaeljkoster 16:3f0efaa57a12 258 result = (putc(cmd[i]) == cmd[i]) ? result + 1 : result;
michaeljkoster 20:d764237405c2 259 wait(.005); // wait for echo
michaeljkoster 16:3f0efaa57a12 260 }
michaeljkoster 16:3f0efaa57a12 261 putc(13); //CR
michaeljkoster 20:d764237405c2 262 wait(.005); // wait for echo
michaeljkoster 16:3f0efaa57a12 263 putc(10); //LF
samux 1:fb4494783863 264
samux 1:fb4494783863 265 while (1) {
samux 1:fb4494783863 266 if (tmr.read_ms() > timeout) {
samux 1:fb4494783863 267 //We flush the buffer
michaeljkoster 17:d11fa4c3ac65 268 while (readable())
michaeljkoster 17:d11fa4c3ac65 269 getc();
samux 1:fb4494783863 270
samux 1:fb4494783863 271 DBG("check: %s\r\n", checking.c_str());
samux 1:fb4494783863 272
samux 1:fb4494783863 273 attach_rx(true);
samux 1:fb4494783863 274 return -1;
michaeljkoster 17:d11fa4c3ac65 275 } else if (readable()) {
michaeljkoster 17:d11fa4c3ac65 276 read = getc();
samux 1:fb4494783863 277 if ( read != '\r' && read != '\n') {
samux 1:fb4494783863 278 checking += read;
samux 1:fb4494783863 279 found = checking.find(ACK);
samux 1:fb4494783863 280 if (found != string::npos) {
samux 1:fb4494783863 281 wait(0.01);
samux 1:fb4494783863 282
samux 1:fb4494783863 283 //We flush the buffer
michaeljkoster 17:d11fa4c3ac65 284 while (readable())
michaeljkoster 17:d11fa4c3ac65 285 getc();
samux 1:fb4494783863 286
samux 1:fb4494783863 287 break;
samux 1:fb4494783863 288 }
samux 1:fb4494783863 289 }
samux 1:fb4494783863 290 }
samux 1:fb4494783863 291 }
samux 1:fb4494783863 292 DBG("check: %s\r\n", checking.c_str());
samux 1:fb4494783863 293
samux 1:fb4494783863 294 attach_rx(true);
samux 1:fb4494783863 295 return result;
samux 1:fb4494783863 296 }
samux 1:fb4494783863 297
samux 1:fb4494783863 298 //the user wants the result from the command (ACK == NULL, res != NULL)
samux 1:fb4494783863 299 if ( res != NULL) {
samux 1:fb4494783863 300 int i = 0;
samux 1:fb4494783863 301 Timer timeout;
samux 1:fb4494783863 302 timeout.start();
samux 1:fb4494783863 303 tmr.reset();
samux 1:fb4494783863 304 while (1) {
samux 1:fb4494783863 305 if (timeout.read() > 2) {
samux 1:fb4494783863 306 if (i == 0) {
samux 1:fb4494783863 307 res = NULL;
samux 1:fb4494783863 308 break;
samux 1:fb4494783863 309 }
samux 1:fb4494783863 310 res[i] = '\0';
samux 1:fb4494783863 311 DBG("user str 1: %s\r\n", res);
samux 1:fb4494783863 312
samux 1:fb4494783863 313 break;
samux 1:fb4494783863 314 } else {
samux 1:fb4494783863 315 if (tmr.read_ms() > 300) {
samux 1:fb4494783863 316 res[i] = '\0';
samux 1:fb4494783863 317 DBG("user str: %s\r\n", res);
samux 1:fb4494783863 318
samux 1:fb4494783863 319 break;
samux 1:fb4494783863 320 }
michaeljkoster 17:d11fa4c3ac65 321 if (readable()) {
samux 1:fb4494783863 322 tmr.start();
michaeljkoster 17:d11fa4c3ac65 323 read = getc();
samux 1:fb4494783863 324
samux 1:fb4494783863 325 // we drop \r and \n
samux 1:fb4494783863 326 if ( read != '\r' && read != '\n') {
samux 1:fb4494783863 327 res[i++] = read;
samux 1:fb4494783863 328 }
samux 1:fb4494783863 329 }
samux 1:fb4494783863 330 }
samux 1:fb4494783863 331 }
samux 1:fb4494783863 332 DBG("user str: %s\r\n", res);
samux 1:fb4494783863 333 }
samux 1:fb4494783863 334
samux 1:fb4494783863 335 //We flush the buffer
michaeljkoster 17:d11fa4c3ac65 336 while (readable())
michaeljkoster 17:d11fa4c3ac65 337 getc();
samux 1:fb4494783863 338
samux 1:fb4494783863 339 attach_rx(true);
samux 1:fb4494783863 340 DBG("result: %d\r\n", result)
samux 1:fb4494783863 341 return result;
michaeljkoster 15:37a7a56a424f 342 }