Steve Kim / ESP8266Interface

Added monitoring feature of ESP8266's UART

Dependents:   ESP8266_W7500_Example DualNetworkInterface-Basic

Fork of ESP8266Interface by ESP8266

ESP8266/ESP8266.cpp@25:8e2b04473830, 2014-12-30 (annotated)

Committer:
michaeljkoster
Date:
Tue Dec 30 00:16:21 2014 +0000
Revision:
25:8e2b04473830
Parent:
24:03585a13ff3b
Child:
26:0d5bcb3903e2
Starting AT v0.2 support for ESP8266

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
michaeljkoster 25:8e2b04473830 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 }
michaeljkoster 25:8e2b04473830 64 */
samux 1:fb4494783863 65
samux 1:fb4494783863 66 inst = this;
samux 1:fb4494783863 67 attach_rx(false);
michaeljkoster 16:3f0efaa57a12 68
michaeljkoster 16:3f0efaa57a12 69 wifi.baud(9600); // initial baud rate of the ESP8266
michaeljkoster 22:c4360e61486a 70
michaeljkoster 22:c4360e61486a 71 state.associated = false;
michaeljkoster 22:c4360e61486a 72 state.cmdMode = false;
samux 1:fb4494783863 73 }
samux 1:fb4494783863 74
michaeljkoster 13:41098c907200 75 bool ESP8266::join()
samux 1:fb4494783863 76 {
michaeljkoster 23:de9221771e96 77 sendCommand( "AT+CWMODE=1", "change", NULL, 1000);
michaeljkoster 16:3f0efaa57a12 78 string cmd="AT+CWJAP=\""+(string)this->ssid+"\",\""+(string)this->phrase+"\"";
michaeljkoster 16:3f0efaa57a12 79 if( sendCommand( cmd.c_str(), "OK", NULL, 10000) ){
michaeljkoster 16:3f0efaa57a12 80 // successfully joined the network
samux 1:fb4494783863 81 state.associated = true;
michaeljkoster 13:41098c907200 82 INFO("\r\nssid: %s\r\nphrase: %s\r\nsecurity: %s\r\n\r\n", this->ssid, this->phrase);
samux 1:fb4494783863 83 return true;
samux 1:fb4494783863 84 }
samux 1:fb4494783863 85 return false;
samux 1:fb4494783863 86 }
samux 1:fb4494783863 87
michaeljkoster 13:41098c907200 88 bool ESP8266::connect()
samux 1:fb4494783863 89 {
michaeljkoster 16:3f0efaa57a12 90 return true;
samux 1:fb4494783863 91 }
samux 1:fb4494783863 92
michaeljkoster 15:37a7a56a424f 93 bool ESP8266::is_connected()
michaeljkoster 15:37a7a56a424f 94 {
michaeljkoster 15:37a7a56a424f 95 return true;
michaeljkoster 15:37a7a56a424f 96 }
michaeljkoster 15:37a7a56a424f 97
michaeljkoster 16:3f0efaa57a12 98 bool ESP8266::startUDP(char* ip, int port){
michaeljkoster 17:d11fa4c3ac65 99 char portstr[5];
michaeljkoster 16:3f0efaa57a12 100 sprintf(portstr, "%d", port);
michaeljkoster 18:60422852e99c 101 sendCommand(( "AT+CIPSTART=\"UDP\",\"" + (string) ip + "\"," + (string) portstr ).c_str(), "OK", NULL, 10000);
michaeljkoster 16:3f0efaa57a12 102
michaeljkoster 17:d11fa4c3ac65 103 sendCommand("AT+CIPMODE=1", "OK", NULL, 1000);// go into transparent mode
michaeljkoster 17:d11fa4c3ac65 104 sendCommand("AT+CIPSEND", ">", NULL, 1000);// go into transparent mode
michaeljkoster 22:c4360e61486a 105 pc.printf("Data Mode\r\n");
michaeljkoster 22:c4360e61486a 106 state.cmdMode = false;
michaeljkoster 22:c4360e61486a 107
michaeljkoster 16:3f0efaa57a12 108 return true;
michaeljkoster 16:3f0efaa57a12 109 }
michaeljkoster 16:3f0efaa57a12 110
michaeljkoster 15:37a7a56a424f 111 bool ESP8266::close()
michaeljkoster 15:37a7a56a424f 112 {
michaeljkoster 17:d11fa4c3ac65 113 send("+++",3);
michaeljkoster 17:d11fa4c3ac65 114 wait(1);
michaeljkoster 22:c4360e61486a 115 state.cmdMode = true;
michaeljkoster 16:3f0efaa57a12 116 sendCommand("AT+CIPCLOSE","OK", NULL, 10000);
michaeljkoster 15:37a7a56a424f 117 return true;
michaeljkoster 15:37a7a56a424f 118 }
michaeljkoster 15:37a7a56a424f 119
michaeljkoster 15:37a7a56a424f 120 bool ESP8266::disconnect()
michaeljkoster 15:37a7a56a424f 121 {
michaeljkoster 15:37a7a56a424f 122 // if already disconnected, return
michaeljkoster 15:37a7a56a424f 123 if (!state.associated)
michaeljkoster 15:37a7a56a424f 124 return true;
michaeljkoster 15:37a7a56a424f 125 // send command to quit AP
michaeljkoster 16:3f0efaa57a12 126 sendCommand("AT+CWQAP", "OK", NULL, 10000);
michaeljkoster 15:37a7a56a424f 127 state.associated = false;
michaeljkoster 15:37a7a56a424f 128 return true;
michaeljkoster 15:37a7a56a424f 129 }
michaeljkoster 15:37a7a56a424f 130
michaeljkoster 15:37a7a56a424f 131 char* ESP8266::getIPAddress()
michaeljkoster 15:37a7a56a424f 132 {
michaeljkoster 16:3f0efaa57a12 133 sendCommand("AT+CWLIF", "OK", NULL, 10000);
michaeljkoster 15:37a7a56a424f 134 return ipString;
michaeljkoster 15:37a7a56a424f 135 }
michaeljkoster 15:37a7a56a424f 136
michaeljkoster 13:41098c907200 137 bool ESP8266::gethostbyname(const char * host, char * ip)
samux 1:fb4494783863 138 {
samux 1:fb4494783863 139 string h = host;
samux 1:fb4494783863 140 int nb_digits = 0;
samux 1:fb4494783863 141
samux 1:fb4494783863 142 // no dns needed
samux 1:fb4494783863 143 int pos = h.find(".");
samux 1:fb4494783863 144 if (pos != string::npos) {
samux 1:fb4494783863 145 string sub = h.substr(0, h.find("."));
samux 1:fb4494783863 146 nb_digits = atoi(sub.c_str());
samux 1:fb4494783863 147 }
samux 1:fb4494783863 148 //printf("substrL %s\r\n", sub.c_str());
samux 1:fb4494783863 149 if (count(h.begin(), h.end(), '.') == 3 && nb_digits > 0) {
samux 1:fb4494783863 150 strcpy(ip, host);
michaeljkoster 13:41098c907200 151 return true;
samux 1:fb4494783863 152 }
samux 1:fb4494783863 153 else {
michaeljkoster 13:41098c907200 154 // dns needed, not currently available
michaeljkoster 13:41098c907200 155 return false;
michaeljkoster 13:41098c907200 156 }
michaeljkoster 13:41098c907200 157 }
samux 1:fb4494783863 158
michaeljkoster 13:41098c907200 159 void ESP8266::reset()
samux 1:fb4494783863 160 {
samux 1:fb4494783863 161 reset_pin = 0;
samux 1:fb4494783863 162 wait(0.2);
samux 1:fb4494783863 163 reset_pin = 1;
michaeljkoster 24:03585a13ff3b 164 wait(1);
michaeljkoster 24:03585a13ff3b 165
michaeljkoster 24:03585a13ff3b 166 //send("+++",3);
michaeljkoster 24:03585a13ff3b 167 //wait(1);
michaeljkoster 24:03585a13ff3b 168 state.cmdMode = true;
michaeljkoster 24:03585a13ff3b 169 sendCommand("AT", "OK", NULL, 1000);
michaeljkoster 24:03585a13ff3b 170 //sendCommand("AT+RST", "ready", NULL, 10000);
michaeljkoster 24:03585a13ff3b 171 state.associated = false;
michaeljkoster 24:03585a13ff3b 172
michaeljkoster 24:03585a13ff3b 173 //pc.printf("setting baud rate\r\n");
michaeljkoster 24:03585a13ff3b 174 //sendCommand("AT+CIOBAUD=9600", "OK", NULL, 2000);
michaeljkoster 24:03585a13ff3b 175 //wifi.baud(9600);
michaeljkoster 24:03585a13ff3b 176 //sendCommand("AT", "OK", NULL, 1000);
samux 1:fb4494783863 177 }
samux 1:fb4494783863 178
michaeljkoster 13:41098c907200 179 bool ESP8266::reboot()
samux 3:9aa05e19c62e 180 {
michaeljkoster 16:3f0efaa57a12 181 reset();
samux 3:9aa05e19c62e 182 return true;
samux 3:9aa05e19c62e 183 }
samux 3:9aa05e19c62e 184
michaeljkoster 15:37a7a56a424f 185 void ESP8266::handler_rx(void)
samux 1:fb4494783863 186 {
michaeljkoster 15:37a7a56a424f 187 //read characters
michaeljkoster 16:3f0efaa57a12 188 char c;
michaeljkoster 16:3f0efaa57a12 189 while (wifi.readable()){
michaeljkoster 16:3f0efaa57a12 190 c=wifi.getc();
michaeljkoster 16:3f0efaa57a12 191 buf_ESP8266.queue(c);
michaeljkoster 22:c4360e61486a 192 if (state.cmdMode) pc.printf("%c",c); //debug echo
michaeljkoster 24:03585a13ff3b 193 //pc.printf("%c",c); //debug echo
michaeljkoster 16:3f0efaa57a12 194 }
michaeljkoster 15:37a7a56a424f 195 }
michaeljkoster 15:37a7a56a424f 196
michaeljkoster 15:37a7a56a424f 197 void ESP8266::attach_rx(bool callback)
michaeljkoster 15:37a7a56a424f 198 {
michaeljkoster 15:37a7a56a424f 199 if (!callback)
michaeljkoster 15:37a7a56a424f 200 wifi.attach(NULL);
michaeljkoster 15:37a7a56a424f 201 else
michaeljkoster 15:37a7a56a424f 202 wifi.attach(this, &ESP8266::handler_rx);
samux 1:fb4494783863 203 }
samux 1:fb4494783863 204
michaeljkoster 13:41098c907200 205 int ESP8266::readable()
samux 1:fb4494783863 206 {
michaeljkoster 13:41098c907200 207 return buf_ESP8266.available();
samux 1:fb4494783863 208 }
samux 1:fb4494783863 209
michaeljkoster 13:41098c907200 210 int ESP8266::writeable()
samux 1:fb4494783863 211 {
samux 1:fb4494783863 212 return wifi.writeable();
samux 1:fb4494783863 213 }
samux 1:fb4494783863 214
michaeljkoster 13:41098c907200 215 char ESP8266::getc()
samux 1:fb4494783863 216 {
michaeljkoster 14:4d1128f72e00 217 char c=0;
michaeljkoster 13:41098c907200 218 while (!buf_ESP8266.available());
michaeljkoster 13:41098c907200 219 buf_ESP8266.dequeue(&c);
samux 1:fb4494783863 220 return c;
samux 1:fb4494783863 221 }
samux 1:fb4494783863 222
michaeljkoster 15:37a7a56a424f 223 int ESP8266::putc(char c)
samux 1:fb4494783863 224 {
michaeljkoster 20:d764237405c2 225 while (!wifi.writeable() || wifi.readable()); //wait for echoed command characters to be read first
michaeljkoster 15:37a7a56a424f 226 return wifi.putc(c);
samux 1:fb4494783863 227 }
samux 1:fb4494783863 228
michaeljkoster 15:37a7a56a424f 229 void ESP8266::flush()
samux 1:fb4494783863 230 {
michaeljkoster 15:37a7a56a424f 231 buf_ESP8266.flush();
samux 1:fb4494783863 232 }
samux 1:fb4494783863 233
michaeljkoster 16:3f0efaa57a12 234 int ESP8266::send(const char * buf, int len)
michaeljkoster 15:37a7a56a424f 235 {
michaeljkoster 18:60422852e99c 236
michaeljkoster 16:3f0efaa57a12 237 const char* bufptr=buf;
michaeljkoster 16:3f0efaa57a12 238 for(int i=0; i<len; i++){
michaeljkoster 17:d11fa4c3ac65 239 putc((int)*bufptr++);
michaeljkoster 18:60422852e99c 240 }
michaeljkoster 19:fb8d5bff2076 241 return len;
michaeljkoster 15:37a7a56a424f 242 }
samux 1:fb4494783863 243
michaeljkoster 16:3f0efaa57a12 244 bool ESP8266::sendCommand(const char * cmd, const char * ACK, char * res, int timeout)
samux 1:fb4494783863 245 {
samux 1:fb4494783863 246 char read;
samux 1:fb4494783863 247 size_t found = string::npos;
samux 1:fb4494783863 248 string checking;
samux 1:fb4494783863 249 Timer tmr;
samux 1:fb4494783863 250 int result = 0;
samux 1:fb4494783863 251
michaeljkoster 17:d11fa4c3ac65 252 //pc.printf("will send: %s\r\n",cmd);
samux 1:fb4494783863 253
michaeljkoster 17:d11fa4c3ac65 254 attach_rx(true);
samux 1:fb4494783863 255
samux 1:fb4494783863 256 //We flush the buffer
michaeljkoster 17:d11fa4c3ac65 257 while (readable())
michaeljkoster 17:d11fa4c3ac65 258 getc();
michaeljkoster 16:3f0efaa57a12 259
samux 1:fb4494783863 260 if (!ACK || !strcmp(ACK, "NO")) {
michaeljkoster 17:d11fa4c3ac65 261 for (int i = 0; i < strlen(cmd); i++){
michaeljkoster 16:3f0efaa57a12 262 result = (putc(cmd[i]) == cmd[i]) ? result + 1 : result;
michaeljkoster 20:d764237405c2 263 wait(.005); // prevents stuck recieve ready (?) need to let echoed character get read first
michaeljkoster 16:3f0efaa57a12 264 }
michaeljkoster 16:3f0efaa57a12 265 putc(13); //CR
michaeljkoster 20:d764237405c2 266 wait(.005); // wait for echo
michaeljkoster 16:3f0efaa57a12 267 putc(10); //LF
michaeljkoster 16:3f0efaa57a12 268
samux 1:fb4494783863 269 } else {
samux 1:fb4494783863 270 //We flush the buffer
michaeljkoster 17:d11fa4c3ac65 271 while (readable())
michaeljkoster 17:d11fa4c3ac65 272 getc();
samux 1:fb4494783863 273
samux 1:fb4494783863 274 tmr.start();
michaeljkoster 17:d11fa4c3ac65 275 for (int i = 0; i < strlen(cmd); i++){
michaeljkoster 16:3f0efaa57a12 276 result = (putc(cmd[i]) == cmd[i]) ? result + 1 : result;
michaeljkoster 20:d764237405c2 277 wait(.005); // wait for echo
michaeljkoster 16:3f0efaa57a12 278 }
michaeljkoster 16:3f0efaa57a12 279 putc(13); //CR
michaeljkoster 20:d764237405c2 280 wait(.005); // wait for echo
michaeljkoster 16:3f0efaa57a12 281 putc(10); //LF
samux 1:fb4494783863 282
samux 1:fb4494783863 283 while (1) {
samux 1:fb4494783863 284 if (tmr.read_ms() > timeout) {
samux 1:fb4494783863 285 //We flush the buffer
michaeljkoster 17:d11fa4c3ac65 286 while (readable())
michaeljkoster 17:d11fa4c3ac65 287 getc();
samux 1:fb4494783863 288
samux 1:fb4494783863 289 DBG("check: %s\r\n", checking.c_str());
samux 1:fb4494783863 290
samux 1:fb4494783863 291 attach_rx(true);
samux 1:fb4494783863 292 return -1;
michaeljkoster 17:d11fa4c3ac65 293 } else if (readable()) {
michaeljkoster 17:d11fa4c3ac65 294 read = getc();
samux 1:fb4494783863 295 if ( read != '\r' && read != '\n') {
samux 1:fb4494783863 296 checking += read;
samux 1:fb4494783863 297 found = checking.find(ACK);
samux 1:fb4494783863 298 if (found != string::npos) {
samux 1:fb4494783863 299 wait(0.01);
samux 1:fb4494783863 300
samux 1:fb4494783863 301 //We flush the buffer
michaeljkoster 17:d11fa4c3ac65 302 while (readable())
michaeljkoster 17:d11fa4c3ac65 303 getc();
samux 1:fb4494783863 304
samux 1:fb4494783863 305 break;
samux 1:fb4494783863 306 }
samux 1:fb4494783863 307 }
samux 1:fb4494783863 308 }
samux 1:fb4494783863 309 }
samux 1:fb4494783863 310 DBG("check: %s\r\n", checking.c_str());
samux 1:fb4494783863 311
samux 1:fb4494783863 312 attach_rx(true);
samux 1:fb4494783863 313 return result;
samux 1:fb4494783863 314 }
samux 1:fb4494783863 315
samux 1:fb4494783863 316 //the user wants the result from the command (ACK == NULL, res != NULL)
samux 1:fb4494783863 317 if ( res != NULL) {
samux 1:fb4494783863 318 int i = 0;
samux 1:fb4494783863 319 Timer timeout;
samux 1:fb4494783863 320 timeout.start();
samux 1:fb4494783863 321 tmr.reset();
samux 1:fb4494783863 322 while (1) {
samux 1:fb4494783863 323 if (timeout.read() > 2) {
samux 1:fb4494783863 324 if (i == 0) {
samux 1:fb4494783863 325 res = NULL;
samux 1:fb4494783863 326 break;
samux 1:fb4494783863 327 }
samux 1:fb4494783863 328 res[i] = '\0';
samux 1:fb4494783863 329 DBG("user str 1: %s\r\n", res);
samux 1:fb4494783863 330
samux 1:fb4494783863 331 break;
samux 1:fb4494783863 332 } else {
samux 1:fb4494783863 333 if (tmr.read_ms() > 300) {
samux 1:fb4494783863 334 res[i] = '\0';
samux 1:fb4494783863 335 DBG("user str: %s\r\n", res);
samux 1:fb4494783863 336
samux 1:fb4494783863 337 break;
samux 1:fb4494783863 338 }
michaeljkoster 17:d11fa4c3ac65 339 if (readable()) {
samux 1:fb4494783863 340 tmr.start();
michaeljkoster 17:d11fa4c3ac65 341 read = getc();
samux 1:fb4494783863 342
samux 1:fb4494783863 343 // we drop \r and \n
samux 1:fb4494783863 344 if ( read != '\r' && read != '\n') {
samux 1:fb4494783863 345 res[i++] = read;
samux 1:fb4494783863 346 }
samux 1:fb4494783863 347 }
samux 1:fb4494783863 348 }
samux 1:fb4494783863 349 }
samux 1:fb4494783863 350 DBG("user str: %s\r\n", res);
samux 1:fb4494783863 351 }
samux 1:fb4494783863 352
samux 1:fb4494783863 353 //We flush the buffer
michaeljkoster 17:d11fa4c3ac65 354 while (readable())
michaeljkoster 17:d11fa4c3ac65 355 getc();
samux 1:fb4494783863 356
samux 1:fb4494783863 357 attach_rx(true);
samux 1:fb4494783863 358 DBG("result: %d\r\n", result)
samux 1:fb4494783863 359 return result;
michaeljkoster 15:37a7a56a424f 360 }