Steve Kim / ESP8266Interface

Added monitoring feature of ESP8266's UART

Dependents:   ESP8266_W7500_Example DualNetworkInterface-Basic

Fork of ESP8266Interface by ESP8266

ESP8266/ESP8266.cpp@17:d11fa4c3ac65, 2014-12-01 (annotated)

Committer:
michaeljkoster
Date:
Mon Dec 01 08:02:38 2014 +0000
Revision:
17:d11fa4c3ac65
Parent:
16:3f0efaa57a12
Child:
18:60422852e99c
working sort of

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 17:d11fa4c3ac65 95 char portstr[5];
michaeljkoster 16:3f0efaa57a12 96 sprintf(portstr, "%d", port);
michaeljkoster 17:d11fa4c3ac65 97 sendCommand(( "AT+CIPSTART=\"UDP\",\"" + (string) ip + "\",\"" + (string) portstr + "\"").c_str(), "OK", NULL, 10000);
michaeljkoster 16:3f0efaa57a12 98
michaeljkoster 17:d11fa4c3ac65 99 sendCommand("AT+CIPMODE=1", "OK", NULL, 1000);// go into transparent mode
michaeljkoster 17:d11fa4c3ac65 100 sendCommand("AT+CIPSEND", ">", 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 17:d11fa4c3ac65 107 send("+++",3);
michaeljkoster 17:d11fa4c3ac65 108 wait(1);
michaeljkoster 16:3f0efaa57a12 109 sendCommand("AT+CIPCLOSE","OK", NULL, 10000);
michaeljkoster 15:37a7a56a424f 110 return true;
michaeljkoster 15:37a7a56a424f 111 }
michaeljkoster 15:37a7a56a424f 112
michaeljkoster 15:37a7a56a424f 113 bool ESP8266::disconnect()
michaeljkoster 15:37a7a56a424f 114 {
michaeljkoster 15:37a7a56a424f 115 // if already disconnected, return
michaeljkoster 15:37a7a56a424f 116 if (!state.associated)
michaeljkoster 15:37a7a56a424f 117 return true;
michaeljkoster 15:37a7a56a424f 118 // send command to quit AP
michaeljkoster 16:3f0efaa57a12 119 sendCommand("AT+CWQAP", "OK", NULL, 10000);
michaeljkoster 15:37a7a56a424f 120 state.associated = false;
michaeljkoster 15:37a7a56a424f 121 return true;
michaeljkoster 15:37a7a56a424f 122 }
michaeljkoster 15:37a7a56a424f 123
michaeljkoster 15:37a7a56a424f 124 char* ESP8266::getIPAddress()
michaeljkoster 15:37a7a56a424f 125 {
michaeljkoster 16:3f0efaa57a12 126 sendCommand("AT+CWLIF", "OK", NULL, 10000);
michaeljkoster 15:37a7a56a424f 127 return ipString;
michaeljkoster 15:37a7a56a424f 128 }
michaeljkoster 15:37a7a56a424f 129
michaeljkoster 13:41098c907200 130 bool ESP8266::gethostbyname(const char * host, char * ip)
samux 1:fb4494783863 131 {
samux 1:fb4494783863 132 string h = host;
samux 1:fb4494783863 133 int nb_digits = 0;
samux 1:fb4494783863 134
samux 1:fb4494783863 135 // no dns needed
samux 1:fb4494783863 136 int pos = h.find(".");
samux 1:fb4494783863 137 if (pos != string::npos) {
samux 1:fb4494783863 138 string sub = h.substr(0, h.find("."));
samux 1:fb4494783863 139 nb_digits = atoi(sub.c_str());
samux 1:fb4494783863 140 }
samux 1:fb4494783863 141 //printf("substrL %s\r\n", sub.c_str());
samux 1:fb4494783863 142 if (count(h.begin(), h.end(), '.') == 3 && nb_digits > 0) {
samux 1:fb4494783863 143 strcpy(ip, host);
michaeljkoster 13:41098c907200 144 return true;
samux 1:fb4494783863 145 }
samux 1:fb4494783863 146 else {
michaeljkoster 13:41098c907200 147 // dns needed, not currently available
michaeljkoster 13:41098c907200 148 return false;
michaeljkoster 13:41098c907200 149 }
michaeljkoster 13:41098c907200 150 }
samux 1:fb4494783863 151
michaeljkoster 13:41098c907200 152 void ESP8266::reset()
samux 1:fb4494783863 153 {
michaeljkoster 16:3f0efaa57a12 154 sendCommand("AT+RST", "ready", NULL, 10000);
michaeljkoster 16:3f0efaa57a12 155 /*
samux 1:fb4494783863 156 reset_pin = 0;
samux 1:fb4494783863 157 wait(0.2);
samux 1:fb4494783863 158 reset_pin = 1;
samux 1:fb4494783863 159 wait(0.2);
michaeljkoster 16:3f0efaa57a12 160 */
samux 1:fb4494783863 161 }
samux 1:fb4494783863 162
michaeljkoster 13:41098c907200 163 bool ESP8266::reboot()
samux 3:9aa05e19c62e 164 {
michaeljkoster 16:3f0efaa57a12 165 reset();
samux 3:9aa05e19c62e 166 return true;
samux 3:9aa05e19c62e 167 }
samux 3:9aa05e19c62e 168
michaeljkoster 15:37a7a56a424f 169 void ESP8266::handler_rx(void)
samux 1:fb4494783863 170 {
michaeljkoster 15:37a7a56a424f 171 //read characters
michaeljkoster 16:3f0efaa57a12 172 char c;
michaeljkoster 16:3f0efaa57a12 173 while (wifi.readable()){
michaeljkoster 16:3f0efaa57a12 174 c=wifi.getc();
michaeljkoster 16:3f0efaa57a12 175 buf_ESP8266.queue(c);
michaeljkoster 17:d11fa4c3ac65 176 pc.printf("%c",c);
michaeljkoster 16:3f0efaa57a12 177 }
michaeljkoster 15:37a7a56a424f 178 }
michaeljkoster 15:37a7a56a424f 179
michaeljkoster 15:37a7a56a424f 180 void ESP8266::attach_rx(bool callback)
michaeljkoster 15:37a7a56a424f 181 {
michaeljkoster 15:37a7a56a424f 182 if (!callback)
michaeljkoster 15:37a7a56a424f 183 wifi.attach(NULL);
michaeljkoster 15:37a7a56a424f 184 else
michaeljkoster 15:37a7a56a424f 185 wifi.attach(this, &ESP8266::handler_rx);
samux 1:fb4494783863 186 }
samux 1:fb4494783863 187
michaeljkoster 13:41098c907200 188 int ESP8266::readable()
samux 1:fb4494783863 189 {
michaeljkoster 13:41098c907200 190 return buf_ESP8266.available();
samux 1:fb4494783863 191 }
samux 1:fb4494783863 192
michaeljkoster 13:41098c907200 193 int ESP8266::writeable()
samux 1:fb4494783863 194 {
samux 1:fb4494783863 195 return wifi.writeable();
samux 1:fb4494783863 196 }
samux 1:fb4494783863 197
michaeljkoster 13:41098c907200 198 char ESP8266::getc()
samux 1:fb4494783863 199 {
michaeljkoster 14:4d1128f72e00 200 char c=0;
michaeljkoster 13:41098c907200 201 while (!buf_ESP8266.available());
michaeljkoster 13:41098c907200 202 buf_ESP8266.dequeue(&c);
samux 1:fb4494783863 203 return c;
samux 1:fb4494783863 204 }
samux 1:fb4494783863 205
michaeljkoster 15:37a7a56a424f 206 int ESP8266::putc(char c)
samux 1:fb4494783863 207 {
michaeljkoster 17:d11fa4c3ac65 208 while (!wifi.writeable() || wifi.readable());
michaeljkoster 15:37a7a56a424f 209 return wifi.putc(c);
samux 1:fb4494783863 210 }
samux 1:fb4494783863 211
michaeljkoster 15:37a7a56a424f 212 void ESP8266::flush()
samux 1:fb4494783863 213 {
michaeljkoster 15:37a7a56a424f 214 buf_ESP8266.flush();
samux 1:fb4494783863 215 }
samux 1:fb4494783863 216
michaeljkoster 16:3f0efaa57a12 217 int ESP8266::send(const char * buf, int len)
michaeljkoster 15:37a7a56a424f 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 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 17:d11fa4c3ac65 233 //pc.printf("will send: %s\r\n",cmd);
samux 1:fb4494783863 234
michaeljkoster 17:d11fa4c3ac65 235 attach_rx(true);
samux 1:fb4494783863 236
samux 1:fb4494783863 237 //We flush the buffer
michaeljkoster 17:d11fa4c3ac65 238 while (readable())
michaeljkoster 17:d11fa4c3ac65 239 getc();
michaeljkoster 16:3f0efaa57a12 240
samux 1:fb4494783863 241 if (!ACK || !strcmp(ACK, "NO")) {
michaeljkoster 17:d11fa4c3ac65 242 for (int i = 0; i < strlen(cmd); i++){
michaeljkoster 16:3f0efaa57a12 243 result = (putc(cmd[i]) == cmd[i]) ? result + 1 : result;
michaeljkoster 17:d11fa4c3ac65 244 wait(.005);
michaeljkoster 16:3f0efaa57a12 245 }
michaeljkoster 16:3f0efaa57a12 246 putc(13); //CR
michaeljkoster 17:d11fa4c3ac65 247 wait(.005);
michaeljkoster 16:3f0efaa57a12 248 putc(10); //LF
michaeljkoster 16:3f0efaa57a12 249
samux 1:fb4494783863 250 } else {
samux 1:fb4494783863 251 //We flush the buffer
michaeljkoster 17:d11fa4c3ac65 252 while (readable())
michaeljkoster 17:d11fa4c3ac65 253 getc();
samux 1:fb4494783863 254
samux 1:fb4494783863 255 tmr.start();
michaeljkoster 17:d11fa4c3ac65 256 for (int i = 0; i < strlen(cmd); i++){
michaeljkoster 16:3f0efaa57a12 257 result = (putc(cmd[i]) == cmd[i]) ? result + 1 : result;
michaeljkoster 17:d11fa4c3ac65 258 wait(.005);
michaeljkoster 16:3f0efaa57a12 259 }
michaeljkoster 16:3f0efaa57a12 260 putc(13); //CR
michaeljkoster 17:d11fa4c3ac65 261 wait(.005);
michaeljkoster 16:3f0efaa57a12 262 putc(10); //LF
samux 1:fb4494783863 263
samux 1:fb4494783863 264 while (1) {
samux 1:fb4494783863 265 if (tmr.read_ms() > timeout) {
samux 1:fb4494783863 266 //We flush the buffer
michaeljkoster 17:d11fa4c3ac65 267 while (readable())
michaeljkoster 17:d11fa4c3ac65 268 getc();
samux 1:fb4494783863 269
samux 1:fb4494783863 270 DBG("check: %s\r\n", checking.c_str());
samux 1:fb4494783863 271
samux 1:fb4494783863 272 attach_rx(true);
samux 1:fb4494783863 273 return -1;
michaeljkoster 17:d11fa4c3ac65 274 } else if (readable()) {
michaeljkoster 17:d11fa4c3ac65 275 read = getc();
samux 1:fb4494783863 276 if ( read != '\r' && read != '\n') {
samux 1:fb4494783863 277 checking += read;
samux 1:fb4494783863 278 found = checking.find(ACK);
samux 1:fb4494783863 279 if (found != string::npos) {
samux 1:fb4494783863 280 wait(0.01);
samux 1:fb4494783863 281
samux 1:fb4494783863 282 //We flush the buffer
michaeljkoster 17:d11fa4c3ac65 283 while (readable())
michaeljkoster 17:d11fa4c3ac65 284 getc();
samux 1:fb4494783863 285
samux 1:fb4494783863 286 break;
samux 1:fb4494783863 287 }
samux 1:fb4494783863 288 }
samux 1:fb4494783863 289 }
samux 1:fb4494783863 290 }
samux 1:fb4494783863 291 DBG("check: %s\r\n", checking.c_str());
samux 1:fb4494783863 292
samux 1:fb4494783863 293 attach_rx(true);
samux 1:fb4494783863 294 return result;
samux 1:fb4494783863 295 }
samux 1:fb4494783863 296
samux 1:fb4494783863 297 //the user wants the result from the command (ACK == NULL, res != NULL)
samux 1:fb4494783863 298 if ( res != NULL) {
samux 1:fb4494783863 299 int i = 0;
samux 1:fb4494783863 300 Timer timeout;
samux 1:fb4494783863 301 timeout.start();
samux 1:fb4494783863 302 tmr.reset();
samux 1:fb4494783863 303 while (1) {
samux 1:fb4494783863 304 if (timeout.read() > 2) {
samux 1:fb4494783863 305 if (i == 0) {
samux 1:fb4494783863 306 res = NULL;
samux 1:fb4494783863 307 break;
samux 1:fb4494783863 308 }
samux 1:fb4494783863 309 res[i] = '\0';
samux 1:fb4494783863 310 DBG("user str 1: %s\r\n", res);
samux 1:fb4494783863 311
samux 1:fb4494783863 312 break;
samux 1:fb4494783863 313 } else {
samux 1:fb4494783863 314 if (tmr.read_ms() > 300) {
samux 1:fb4494783863 315 res[i] = '\0';
samux 1:fb4494783863 316 DBG("user str: %s\r\n", res);
samux 1:fb4494783863 317
samux 1:fb4494783863 318 break;
samux 1:fb4494783863 319 }
michaeljkoster 17:d11fa4c3ac65 320 if (readable()) {
samux 1:fb4494783863 321 tmr.start();
michaeljkoster 17:d11fa4c3ac65 322 read = getc();
samux 1:fb4494783863 323
samux 1:fb4494783863 324 // we drop \r and \n
samux 1:fb4494783863 325 if ( read != '\r' && read != '\n') {
samux 1:fb4494783863 326 res[i++] = read;
samux 1:fb4494783863 327 }
samux 1:fb4494783863 328 }
samux 1:fb4494783863 329 }
samux 1:fb4494783863 330 }
samux 1:fb4494783863 331 DBG("user str: %s\r\n", res);
samux 1:fb4494783863 332 }
samux 1:fb4494783863 333
samux 1:fb4494783863 334 //We flush the buffer
michaeljkoster 17:d11fa4c3ac65 335 while (readable())
michaeljkoster 17:d11fa4c3ac65 336 getc();
samux 1:fb4494783863 337
samux 1:fb4494783863 338 attach_rx(true);
samux 1:fb4494783863 339 DBG("result: %d\r\n", result)
samux 1:fb4494783863 340 return result;
michaeljkoster 15:37a7a56a424f 341 }
michaeljkoster 16:3f0efaa57a12 342
michaeljkoster 16:3f0efaa57a12 343 void ESP8266::ATcommand(char* command){
michaeljkoster 16:3f0efaa57a12 344 char* cmd=command;
michaeljkoster 16:3f0efaa57a12 345 while(!wifi.writeable() || wifi.readable()){}
michaeljkoster 16:3f0efaa57a12 346 while(*cmd){
michaeljkoster 16:3f0efaa57a12 347 wifi.putc((int)*cmd++);
michaeljkoster 16:3f0efaa57a12 348 wait(.005); // wait for the echo
michaeljkoster 16:3f0efaa57a12 349 while(!wifi.writeable() || wifi.readable()){}
michaeljkoster 16:3f0efaa57a12 350 }
michaeljkoster 16:3f0efaa57a12 351 wifi.putc(13); //CR
michaeljkoster 16:3f0efaa57a12 352 while(!wifi.writeable() || wifi.readable()){}
michaeljkoster 16:3f0efaa57a12 353 wifi.putc(10); //LF
michaeljkoster 16:3f0efaa57a12 354 }