Steve Kim / ESP8266Interface

Added monitoring feature of ESP8266's UART

Dependents:   ESP8266_W7500_Example DualNetworkInterface-Basic

Fork of ESP8266Interface by ESP8266

ESP8266/ESP8266.cpp@16:3f0efaa57a12, 2014-12-01 (annotated)

Committer:
michaeljkoster
Date:
Mon Dec 01 06:22:00 2014 +0000
Revision:
16:3f0efaa57a12
Parent:
15:37a7a56a424f
Child:
17:d11fa4c3ac65
sync

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
michaeljkoster 16:3f0efaa57a12 69 pc.printf("ESP8266 test\r\n");
samux 1:fb4494783863 70 }
samux 1:fb4494783863 71
michaeljkoster 13:41098c907200 72 bool ESP8266::join()
samux 1:fb4494783863 73 {
michaeljkoster 16:3f0efaa57a12 74 string cmd="AT+CWJAP=\""+(string)this->ssid+"\",\""+(string)this->phrase+"\"";
michaeljkoster 16:3f0efaa57a12 75 if( sendCommand( cmd.c_str(), "OK", NULL, 10000) ){
michaeljkoster 16:3f0efaa57a12 76 // successfully joined the network
samux 1:fb4494783863 77 state.associated = true;
michaeljkoster 13:41098c907200 78 INFO("\r\nssid: %s\r\nphrase: %s\r\nsecurity: %s\r\n\r\n", this->ssid, this->phrase);
samux 1:fb4494783863 79 return true;
samux 1:fb4494783863 80 }
samux 1:fb4494783863 81 return false;
samux 1:fb4494783863 82 }
samux 1:fb4494783863 83
michaeljkoster 13:41098c907200 84 bool ESP8266::connect()
samux 1:fb4494783863 85 {
michaeljkoster 16:3f0efaa57a12 86 return true;
samux 1:fb4494783863 87 }
samux 1:fb4494783863 88
michaeljkoster 15:37a7a56a424f 89 bool ESP8266::is_connected()
michaeljkoster 15:37a7a56a424f 90 {
michaeljkoster 15:37a7a56a424f 91 return true;
michaeljkoster 15:37a7a56a424f 92 }
michaeljkoster 15:37a7a56a424f 93
michaeljkoster 16:3f0efaa57a12 94 bool ESP8266::startUDP(char* ip, int port){
michaeljkoster 16:3f0efaa57a12 95 char* portstr = "";
michaeljkoster 16:3f0efaa57a12 96 sprintf(portstr, "%d", port);
michaeljkoster 16:3f0efaa57a12 97
michaeljkoster 16:3f0efaa57a12 98 sendCommand(( "AT+CIPSTART=\"UDP\",\"" + (string) ip + "\"" + (string) portstr + "\"").c_str(), "OK", NULL, 10000);
michaeljkoster 16:3f0efaa57a12 99
michaeljkoster 16:3f0efaa57a12 100 sendCommand("AT+CIPSEND", "OK", NULL, 1000);// go into transparent mode
michaeljkoster 16:3f0efaa57a12 101
michaeljkoster 16:3f0efaa57a12 102 return true;
michaeljkoster 16:3f0efaa57a12 103 }
michaeljkoster 16:3f0efaa57a12 104
michaeljkoster 15:37a7a56a424f 105 bool ESP8266::close()
michaeljkoster 15:37a7a56a424f 106 {
michaeljkoster 16:3f0efaa57a12 107 sendCommand("AT+CIPCLOSE","OK", NULL, 10000);
michaeljkoster 15:37a7a56a424f 108 return true;
michaeljkoster 15:37a7a56a424f 109 }
michaeljkoster 15:37a7a56a424f 110
michaeljkoster 15:37a7a56a424f 111 bool ESP8266::disconnect()
michaeljkoster 15:37a7a56a424f 112 {
michaeljkoster 15:37a7a56a424f 113 // if already disconnected, return
michaeljkoster 15:37a7a56a424f 114 if (!state.associated)
michaeljkoster 15:37a7a56a424f 115 return true;
michaeljkoster 15:37a7a56a424f 116 // send command to quit AP
michaeljkoster 16:3f0efaa57a12 117 sendCommand("AT+CWQAP", "OK", NULL, 10000);
michaeljkoster 15:37a7a56a424f 118 state.associated = false;
michaeljkoster 15:37a7a56a424f 119 return true;
michaeljkoster 15:37a7a56a424f 120 }
michaeljkoster 15:37a7a56a424f 121
michaeljkoster 15:37a7a56a424f 122 char* ESP8266::getIPAddress()
michaeljkoster 15:37a7a56a424f 123 {
michaeljkoster 16:3f0efaa57a12 124 sendCommand("AT+CWLIF", "OK", NULL, 10000);
michaeljkoster 15:37a7a56a424f 125 return ipString;
michaeljkoster 15:37a7a56a424f 126 }
michaeljkoster 15:37a7a56a424f 127
michaeljkoster 13:41098c907200 128 bool ESP8266::gethostbyname(const char * host, char * ip)
samux 1:fb4494783863 129 {
samux 1:fb4494783863 130 string h = host;
samux 1:fb4494783863 131 int nb_digits = 0;
samux 1:fb4494783863 132
samux 1:fb4494783863 133 // no dns needed
samux 1:fb4494783863 134 int pos = h.find(".");
samux 1:fb4494783863 135 if (pos != string::npos) {
samux 1:fb4494783863 136 string sub = h.substr(0, h.find("."));
samux 1:fb4494783863 137 nb_digits = atoi(sub.c_str());
samux 1:fb4494783863 138 }
samux 1:fb4494783863 139 //printf("substrL %s\r\n", sub.c_str());
samux 1:fb4494783863 140 if (count(h.begin(), h.end(), '.') == 3 && nb_digits > 0) {
samux 1:fb4494783863 141 strcpy(ip, host);
michaeljkoster 13:41098c907200 142 return true;
samux 1:fb4494783863 143 }
samux 1:fb4494783863 144 else {
michaeljkoster 13:41098c907200 145 // dns needed, not currently available
michaeljkoster 13:41098c907200 146 return false;
michaeljkoster 13:41098c907200 147 }
michaeljkoster 13:41098c907200 148 }
samux 1:fb4494783863 149
michaeljkoster 13:41098c907200 150 void ESP8266::reset()
samux 1:fb4494783863 151 {
michaeljkoster 16:3f0efaa57a12 152 sendCommand("AT+RST", "ready", NULL, 10000);
michaeljkoster 16:3f0efaa57a12 153 /*
samux 1:fb4494783863 154 reset_pin = 0;
samux 1:fb4494783863 155 wait(0.2);
samux 1:fb4494783863 156 reset_pin = 1;
samux 1:fb4494783863 157 wait(0.2);
michaeljkoster 16:3f0efaa57a12 158 */
samux 1:fb4494783863 159 }
samux 1:fb4494783863 160
michaeljkoster 13:41098c907200 161 bool ESP8266::reboot()
samux 3:9aa05e19c62e 162 {
michaeljkoster 16:3f0efaa57a12 163 reset();
samux 3:9aa05e19c62e 164 return true;
samux 3:9aa05e19c62e 165 }
samux 3:9aa05e19c62e 166
michaeljkoster 15:37a7a56a424f 167 void ESP8266::handler_rx(void)
samux 1:fb4494783863 168 {
michaeljkoster 15:37a7a56a424f 169 //read characters
michaeljkoster 16:3f0efaa57a12 170 char c;
michaeljkoster 16:3f0efaa57a12 171 while (wifi.readable()){
michaeljkoster 16:3f0efaa57a12 172 c=wifi.getc();
michaeljkoster 16:3f0efaa57a12 173 buf_ESP8266.queue(c);
michaeljkoster 16:3f0efaa57a12 174 //pc.printf("%c",c);
michaeljkoster 16:3f0efaa57a12 175 }
michaeljkoster 15:37a7a56a424f 176 }
michaeljkoster 15:37a7a56a424f 177
michaeljkoster 15:37a7a56a424f 178 void ESP8266::attach_rx(bool callback)
michaeljkoster 15:37a7a56a424f 179 {
michaeljkoster 15:37a7a56a424f 180 if (!callback)
michaeljkoster 15:37a7a56a424f 181 wifi.attach(NULL);
michaeljkoster 15:37a7a56a424f 182 else
michaeljkoster 15:37a7a56a424f 183 wifi.attach(this, &ESP8266::handler_rx);
samux 1:fb4494783863 184 }
samux 1:fb4494783863 185
michaeljkoster 13:41098c907200 186 int ESP8266::readable()
samux 1:fb4494783863 187 {
michaeljkoster 13:41098c907200 188 return buf_ESP8266.available();
samux 1:fb4494783863 189 }
samux 1:fb4494783863 190
michaeljkoster 13:41098c907200 191 int ESP8266::writeable()
samux 1:fb4494783863 192 {
samux 1:fb4494783863 193 return wifi.writeable();
samux 1:fb4494783863 194 }
samux 1:fb4494783863 195
michaeljkoster 13:41098c907200 196 char ESP8266::getc()
samux 1:fb4494783863 197 {
michaeljkoster 14:4d1128f72e00 198 char c=0;
michaeljkoster 13:41098c907200 199 while (!buf_ESP8266.available());
michaeljkoster 13:41098c907200 200 buf_ESP8266.dequeue(&c);
samux 1:fb4494783863 201 return c;
samux 1:fb4494783863 202 }
samux 1:fb4494783863 203
michaeljkoster 15:37a7a56a424f 204 int ESP8266::putc(char c)
samux 1:fb4494783863 205 {
michaeljkoster 15:37a7a56a424f 206 while (!wifi.writeable());
michaeljkoster 15:37a7a56a424f 207 return wifi.putc(c);
samux 1:fb4494783863 208 }
samux 1:fb4494783863 209
michaeljkoster 15:37a7a56a424f 210 void ESP8266::flush()
samux 1:fb4494783863 211 {
michaeljkoster 15:37a7a56a424f 212 buf_ESP8266.flush();
samux 1:fb4494783863 213 }
samux 1:fb4494783863 214
michaeljkoster 16:3f0efaa57a12 215 int ESP8266::send(const char * buf, int len)
michaeljkoster 15:37a7a56a424f 216 {
michaeljkoster 16:3f0efaa57a12 217 const char* bufptr=buf;
michaeljkoster 16:3f0efaa57a12 218 while(!wifi.writeable()){}
michaeljkoster 16:3f0efaa57a12 219 for(int i=0; i<len; i++){
michaeljkoster 16:3f0efaa57a12 220 wifi.putc((int)*bufptr++);
michaeljkoster 16:3f0efaa57a12 221 while(!wifi.writeable()){}
michaeljkoster 16:3f0efaa57a12 222 }return true;
michaeljkoster 15:37a7a56a424f 223 }
samux 1:fb4494783863 224
michaeljkoster 16:3f0efaa57a12 225 bool ESP8266::sendCommand(const char * cmd, const char * ACK, char * res, int timeout)
samux 1:fb4494783863 226 {
samux 1:fb4494783863 227 char read;
samux 1:fb4494783863 228 size_t found = string::npos;
samux 1:fb4494783863 229 string checking;
samux 1:fb4494783863 230 Timer tmr;
samux 1:fb4494783863 231 int result = 0;
samux 1:fb4494783863 232
michaeljkoster 16:3f0efaa57a12 233 DBG("will send: %s\r\n",cmd);
samux 1:fb4494783863 234
samux 1:fb4494783863 235 attach_rx(false);
samux 1:fb4494783863 236
samux 1:fb4494783863 237 //We flush the buffer
samux 1:fb4494783863 238 while (wifi.readable())
samux 1:fb4494783863 239 wifi.getc();
michaeljkoster 16:3f0efaa57a12 240
michaeljkoster 16:3f0efaa57a12 241 while(!wifi.writeable()){};
samux 1:fb4494783863 242
samux 1:fb4494783863 243 if (!ACK || !strcmp(ACK, "NO")) {
michaeljkoster 16:3f0efaa57a12 244 for (int i = 0; i < sizeof(cmd); i++){
michaeljkoster 16:3f0efaa57a12 245 result = (putc(cmd[i]) == cmd[i]) ? result + 1 : result;
michaeljkoster 16:3f0efaa57a12 246 while(!wifi.writeable()){};
michaeljkoster 16:3f0efaa57a12 247 }
michaeljkoster 16:3f0efaa57a12 248 putc(13); //CR
michaeljkoster 16:3f0efaa57a12 249 while(!wifi.writeable()){};
michaeljkoster 16:3f0efaa57a12 250 putc(10); //LF
michaeljkoster 16:3f0efaa57a12 251
samux 1:fb4494783863 252 } else {
samux 1:fb4494783863 253 //We flush the buffer
samux 1:fb4494783863 254 while (wifi.readable())
samux 1:fb4494783863 255 wifi.getc();
samux 1:fb4494783863 256
samux 1:fb4494783863 257 tmr.start();
michaeljkoster 16:3f0efaa57a12 258 for (int i = 0; i < sizeof(cmd); i++){
michaeljkoster 16:3f0efaa57a12 259 result = (putc(cmd[i]) == cmd[i]) ? result + 1 : result;
michaeljkoster 16:3f0efaa57a12 260 while(!wifi.writeable()){};
michaeljkoster 16:3f0efaa57a12 261 }
michaeljkoster 16:3f0efaa57a12 262 putc(13); //CR
michaeljkoster 16:3f0efaa57a12 263 while(!wifi.writeable()){};
michaeljkoster 16:3f0efaa57a12 264 putc(10); //LF
samux 1:fb4494783863 265
samux 1:fb4494783863 266 while (1) {
samux 1:fb4494783863 267 if (tmr.read_ms() > timeout) {
samux 1:fb4494783863 268 //We flush the buffer
samux 1:fb4494783863 269 while (wifi.readable())
samux 1:fb4494783863 270 wifi.getc();
samux 1:fb4494783863 271
samux 1:fb4494783863 272 DBG("check: %s\r\n", checking.c_str());
samux 1:fb4494783863 273
samux 1:fb4494783863 274 attach_rx(true);
samux 1:fb4494783863 275 return -1;
samux 1:fb4494783863 276 } else if (wifi.readable()) {
samux 1:fb4494783863 277 read = wifi.getc();
michaeljkoster 16:3f0efaa57a12 278 pc.putc(read);//debug
samux 1:fb4494783863 279 if ( read != '\r' && read != '\n') {
samux 1:fb4494783863 280 checking += read;
samux 1:fb4494783863 281 found = checking.find(ACK);
samux 1:fb4494783863 282 if (found != string::npos) {
samux 1:fb4494783863 283 wait(0.01);
samux 1:fb4494783863 284
samux 1:fb4494783863 285 //We flush the buffer
samux 1:fb4494783863 286 while (wifi.readable())
samux 1:fb4494783863 287 wifi.getc();
samux 1:fb4494783863 288
samux 1:fb4494783863 289 break;
samux 1:fb4494783863 290 }
samux 1:fb4494783863 291 }
samux 1:fb4494783863 292 }
samux 1:fb4494783863 293 }
samux 1:fb4494783863 294 DBG("check: %s\r\n", checking.c_str());
samux 1:fb4494783863 295
samux 1:fb4494783863 296 attach_rx(true);
samux 1:fb4494783863 297 return result;
samux 1:fb4494783863 298 }
samux 1:fb4494783863 299
samux 1:fb4494783863 300 //the user wants the result from the command (ACK == NULL, res != NULL)
samux 1:fb4494783863 301 if ( res != NULL) {
samux 1:fb4494783863 302 int i = 0;
samux 1:fb4494783863 303 Timer timeout;
samux 1:fb4494783863 304 timeout.start();
samux 1:fb4494783863 305 tmr.reset();
samux 1:fb4494783863 306 while (1) {
samux 1:fb4494783863 307 if (timeout.read() > 2) {
samux 1:fb4494783863 308 if (i == 0) {
samux 1:fb4494783863 309 res = NULL;
samux 1:fb4494783863 310 break;
samux 1:fb4494783863 311 }
samux 1:fb4494783863 312 res[i] = '\0';
samux 1:fb4494783863 313 DBG("user str 1: %s\r\n", res);
samux 1:fb4494783863 314
samux 1:fb4494783863 315 break;
samux 1:fb4494783863 316 } else {
samux 1:fb4494783863 317 if (tmr.read_ms() > 300) {
samux 1:fb4494783863 318 res[i] = '\0';
samux 1:fb4494783863 319 DBG("user str: %s\r\n", res);
samux 1:fb4494783863 320
samux 1:fb4494783863 321 break;
samux 1:fb4494783863 322 }
samux 1:fb4494783863 323 if (wifi.readable()) {
samux 1:fb4494783863 324 tmr.start();
samux 1:fb4494783863 325 read = wifi.getc();
samux 1:fb4494783863 326
samux 1:fb4494783863 327 // we drop \r and \n
samux 1:fb4494783863 328 if ( read != '\r' && read != '\n') {
samux 1:fb4494783863 329 res[i++] = read;
samux 1:fb4494783863 330 }
samux 1:fb4494783863 331 }
samux 1:fb4494783863 332 }
samux 1:fb4494783863 333 }
samux 1:fb4494783863 334 DBG("user str: %s\r\n", res);
samux 1:fb4494783863 335 }
samux 1:fb4494783863 336
samux 1:fb4494783863 337 //We flush the buffer
samux 1:fb4494783863 338 while (wifi.readable())
samux 1:fb4494783863 339 wifi.getc();
samux 1:fb4494783863 340
samux 1:fb4494783863 341 attach_rx(true);
samux 1:fb4494783863 342 DBG("result: %d\r\n", result)
samux 1:fb4494783863 343 return result;
michaeljkoster 15:37a7a56a424f 344 }
michaeljkoster 16:3f0efaa57a12 345
michaeljkoster 16:3f0efaa57a12 346 void ESP8266::ATcommand(char* command){
michaeljkoster 16:3f0efaa57a12 347 char* cmd=command;
michaeljkoster 16:3f0efaa57a12 348 while(!wifi.writeable() || wifi.readable()){}
michaeljkoster 16:3f0efaa57a12 349 while(*cmd){
michaeljkoster 16:3f0efaa57a12 350 wifi.putc((int)*cmd++);
michaeljkoster 16:3f0efaa57a12 351 wait(.005); // wait for the echo
michaeljkoster 16:3f0efaa57a12 352 while(!wifi.writeable() || wifi.readable()){}
michaeljkoster 16:3f0efaa57a12 353 }
michaeljkoster 16:3f0efaa57a12 354 wifi.putc(13); //CR
michaeljkoster 16:3f0efaa57a12 355 while(!wifi.writeable() || wifi.readable()){}
michaeljkoster 16:3f0efaa57a12 356 wifi.putc(10); //LF
michaeljkoster 16:3f0efaa57a12 357 }