fernan robin / Projet-matthieu

wifly/socket interface for wifly modules

Dependents:   PROJET_MATTHIEU_2019 PROJET_MATTHIEU_2019

Wifly/Wifly.cpp@0:6ffb0aeb3972, 2012-08-17 (annotated)

Committer:
samux
Date:
Fri Aug 17 08:28:04 2012 +0000
Revision:
0:6ffb0aeb3972
Child:
1:8f04181f9ad8
first commit

Who changed what in which revision?

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samux 0:6ffb0aeb3972 1 /* Copyright (C) 2012 mbed.org, MIT License
samux 0:6ffb0aeb3972 2 *
samux 0:6ffb0aeb3972 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
samux 0:6ffb0aeb3972 4 * and associated documentation files (the "Software"), to deal in the Software without restriction,
samux 0:6ffb0aeb3972 5 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
samux 0:6ffb0aeb3972 6 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
samux 0:6ffb0aeb3972 7 * furnished to do so, subject to the following conditions:
samux 0:6ffb0aeb3972 8 *
samux 0:6ffb0aeb3972 9 * The above copyright notice and this permission notice shall be included in all copies or
samux 0:6ffb0aeb3972 10 * substantial portions of the Software.
samux 0:6ffb0aeb3972 11 *
samux 0:6ffb0aeb3972 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
samux 0:6ffb0aeb3972 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
samux 0:6ffb0aeb3972 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
samux 0:6ffb0aeb3972 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
samux 0:6ffb0aeb3972 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
samux 0:6ffb0aeb3972 17 */
samux 0:6ffb0aeb3972 18
samux 0:6ffb0aeb3972 19 #include "mbed.h"
samux 0:6ffb0aeb3972 20 #include "Wifly.h"
samux 0:6ffb0aeb3972 21 #include <string>
samux 0:6ffb0aeb3972 22
samux 0:6ffb0aeb3972 23 //Debug is disabled by default
samux 0:6ffb0aeb3972 24 #if 0
samux 0:6ffb0aeb3972 25 #define DBG(x, ...) std::printf("[Wifly : DBG]"x"\r\n", ##__VA_ARGS__);
samux 0:6ffb0aeb3972 26 #define WARN(x, ...) std::printf("[Wifly : WARN]"x"\r\n", ##__VA_ARGS__);
samux 0:6ffb0aeb3972 27 #define ERR(x, ...) std::printf("[Wifly : ERR]"x"\r\n", ##__VA_ARGS__);
samux 0:6ffb0aeb3972 28 #else
samux 0:6ffb0aeb3972 29 #define DBG(x, ...)
samux 0:6ffb0aeb3972 30 #define WARN(x, ...)
samux 0:6ffb0aeb3972 31 #define ERR(x, ...)
samux 0:6ffb0aeb3972 32 #endif
samux 0:6ffb0aeb3972 33
samux 0:6ffb0aeb3972 34 #define INFO(x, ...) printf("[Wifly : INFO]"x"\r\n", ##__VA_ARGS__);
samux 0:6ffb0aeb3972 35
samux 0:6ffb0aeb3972 36 Wifly * Wifly::inst;
samux 0:6ffb0aeb3972 37
samux 0:6ffb0aeb3972 38 Wifly::Wifly( PinName tx, PinName rx, PinName _reset, PinName tcp_status, const char * ssid, const char * phrase, bool wpa):
samux 0:6ffb0aeb3972 39 wifi(tx, rx), reset_pin(_reset), tcp_status(tcp_status), buf_wifly(256) {
samux 0:6ffb0aeb3972 40 this->wpa = wpa;
samux 0:6ffb0aeb3972 41 this->phrase = phrase;
samux 0:6ffb0aeb3972 42 this->ssid = ssid;
samux 0:6ffb0aeb3972 43 inst = this;
samux 0:6ffb0aeb3972 44 attach_rx(false);
samux 0:6ffb0aeb3972 45 cmd_mode = false;
samux 0:6ffb0aeb3972 46 }
samux 0:6ffb0aeb3972 47
samux 0:6ffb0aeb3972 48 bool Wifly::join() {
samux 0:6ffb0aeb3972 49 char cmd[100];
samux 0:6ffb0aeb3972 50
samux 0:6ffb0aeb3972 51 if (!sendCommand("set comm time 20\r", "AOK"))
samux 0:6ffb0aeb3972 52 return false;
samux 0:6ffb0aeb3972 53
samux 0:6ffb0aeb3972 54 if (!sendCommand("set comm size 128\r", "AOK"))
samux 0:6ffb0aeb3972 55 return false;
samux 0:6ffb0aeb3972 56
samux 0:6ffb0aeb3972 57 if (!sendCommand("set sys iofunc 0x40\r", "AOK"))
samux 0:6ffb0aeb3972 58 return false;
samux 0:6ffb0aeb3972 59
samux 0:6ffb0aeb3972 60 // no string sent to the tcp client
samux 0:6ffb0aeb3972 61 if (!sendCommand("set comm remote 0\r", "AOK"))
samux 0:6ffb0aeb3972 62 return false;
samux 0:6ffb0aeb3972 63
samux 0:6ffb0aeb3972 64 // tcp protocol
samux 0:6ffb0aeb3972 65 if (!sendCommand("set ip proto 2\r", "AOK"))
samux 0:6ffb0aeb3972 66 return false;
samux 0:6ffb0aeb3972 67
samux 0:6ffb0aeb3972 68 // tcp retry
samux 0:6ffb0aeb3972 69 if (!sendCommand("set ip flags 0x7\r", "AOK"))
samux 0:6ffb0aeb3972 70 return false;
samux 0:6ffb0aeb3972 71
samux 0:6ffb0aeb3972 72 //no echo
samux 0:6ffb0aeb3972 73 if (!sendCommand("set u m 1\r", "AOK"))
samux 0:6ffb0aeb3972 74 return false;
samux 0:6ffb0aeb3972 75
samux 0:6ffb0aeb3972 76 //dhcp
samux 0:6ffb0aeb3972 77 sprintf(cmd, "set i d %d\r", (dhcp) ? 1 : 0);
samux 0:6ffb0aeb3972 78 if (!sendCommand(cmd, "AOK"))
samux 0:6ffb0aeb3972 79 return false;
samux 0:6ffb0aeb3972 80
samux 0:6ffb0aeb3972 81 if (dhcp) {
samux 0:6ffb0aeb3972 82 if (!sendCommand("get w\r", NULL, cmd))
samux 0:6ffb0aeb3972 83 return false;
samux 0:6ffb0aeb3972 84
samux 0:6ffb0aeb3972 85 // if the wlan parameters are already known, we just connect without resending all commands
samux 0:6ffb0aeb3972 86 if ((string(cmd).find(ssid) != string::npos) && (string(cmd).find(phrase) != string::npos) ) {
samux 0:6ffb0aeb3972 87 DBG("ssid found && phrase found\r\n");
samux 0:6ffb0aeb3972 88 Timer tmr;
samux 0:6ffb0aeb3972 89 tmr.start();
samux 0:6ffb0aeb3972 90 while (tmr.read() < 2) {
samux 0:6ffb0aeb3972 91 send("show c\r", 7, NULL, cmd);
samux 0:6ffb0aeb3972 92 DBG("join: state of conn: %s\r\n", cmd);
samux 0:6ffb0aeb3972 93 if ((cmd[2] - '0') & 0x01) {
samux 0:6ffb0aeb3972 94 INFO("\r\nssid: %s\r\nphrase: %s\r\nsecurity: %s\r\n\r\n", this->ssid, this->phrase, (wpa) ? "WPA" : "WEP");
samux 0:6ffb0aeb3972 95 // save
samux 0:6ffb0aeb3972 96 if (!sendCommand("save\r", "Stor"))
samux 0:6ffb0aeb3972 97 return false;
samux 0:6ffb0aeb3972 98 reboot();
samux 0:6ffb0aeb3972 99 return true;
samux 0:6ffb0aeb3972 100 }
samux 0:6ffb0aeb3972 101 wait(0.2);
samux 0:6ffb0aeb3972 102 }
samux 0:6ffb0aeb3972 103 }
samux 0:6ffb0aeb3972 104
samux 0:6ffb0aeb3972 105 DBG("getw: %s\r\n", cmd);
samux 0:6ffb0aeb3972 106 }
samux 0:6ffb0aeb3972 107
samux 0:6ffb0aeb3972 108 // ssid
samux 0:6ffb0aeb3972 109 sprintf(cmd, "set w s %s\r", ssid);
samux 0:6ffb0aeb3972 110 if (!sendCommand(cmd, "AOK"))
samux 0:6ffb0aeb3972 111 return false;
samux 0:6ffb0aeb3972 112
samux 0:6ffb0aeb3972 113 //auth
samux 0:6ffb0aeb3972 114 sprintf(cmd, "set w a %d\r", (wpa) ? 3 : 1);
samux 0:6ffb0aeb3972 115 if (!sendCommand(cmd, "AOK"))
samux 0:6ffb0aeb3972 116 return false;
samux 0:6ffb0aeb3972 117
samux 0:6ffb0aeb3972 118 // if no dhcp, set ip, netmask and gateway
samux 0:6ffb0aeb3972 119 if (!dhcp) {
samux 0:6ffb0aeb3972 120 DBG("not dhcp\r");
samux 0:6ffb0aeb3972 121
samux 0:6ffb0aeb3972 122 sprintf(cmd, "set i a %s\r\n", ip);
samux 0:6ffb0aeb3972 123 if (!sendCommand(cmd, "AOK"))
samux 0:6ffb0aeb3972 124 return false;
samux 0:6ffb0aeb3972 125
samux 0:6ffb0aeb3972 126 sprintf(cmd, "set i n %s\r", netmask);
samux 0:6ffb0aeb3972 127 if (!sendCommand(cmd, "AOK"))
samux 0:6ffb0aeb3972 128 return false;
samux 0:6ffb0aeb3972 129
samux 0:6ffb0aeb3972 130 sprintf(cmd, "set i g %s\r", gateway);
samux 0:6ffb0aeb3972 131 if (!sendCommand(cmd, "AOK"))
samux 0:6ffb0aeb3972 132 return false;
samux 0:6ffb0aeb3972 133 }
samux 0:6ffb0aeb3972 134
samux 0:6ffb0aeb3972 135 //key step
samux 0:6ffb0aeb3972 136 if (wpa)
samux 0:6ffb0aeb3972 137 sprintf(cmd, "set w p %s\r", phrase);
samux 0:6ffb0aeb3972 138 else
samux 0:6ffb0aeb3972 139 sprintf(cmd, "set w k %s\r", phrase);
samux 0:6ffb0aeb3972 140
samux 0:6ffb0aeb3972 141 if (!sendCommand(cmd, "AOK"))
samux 0:6ffb0aeb3972 142 return false;
samux 0:6ffb0aeb3972 143
samux 0:6ffb0aeb3972 144 // auto join
samux 0:6ffb0aeb3972 145 if (!sendCommand("set w j 1\r", "AOK"))
samux 0:6ffb0aeb3972 146 return false;
samux 0:6ffb0aeb3972 147
samux 0:6ffb0aeb3972 148 // save
samux 0:6ffb0aeb3972 149 if (!sendCommand("save\r", "Stor"))
samux 0:6ffb0aeb3972 150 return false;
samux 0:6ffb0aeb3972 151
samux 0:6ffb0aeb3972 152 //join the network
samux 0:6ffb0aeb3972 153 sprintf(cmd, "join %s\r", ssid);
samux 0:6ffb0aeb3972 154 if (!sendCommand(cmd, "Associated"))
samux 0:6ffb0aeb3972 155 return false;
samux 0:6ffb0aeb3972 156
samux 0:6ffb0aeb3972 157 reboot();
samux 0:6ffb0aeb3972 158
samux 0:6ffb0aeb3972 159 INFO("\r\nssid: %s\r\nphrase: %s\r\nsecurity: %s\r\n\r\n", this->ssid, this->phrase, (wpa) ? "WPA" : "WEP");
samux 0:6ffb0aeb3972 160 return true;
samux 0:6ffb0aeb3972 161 }
samux 0:6ffb0aeb3972 162
samux 0:6ffb0aeb3972 163 bool Wifly::reboot() {
samux 0:6ffb0aeb3972 164 if (!sendCommand("reboot\r", "boot"))
samux 0:6ffb0aeb3972 165 return false;
samux 0:6ffb0aeb3972 166 wait(0.2);
samux 0:6ffb0aeb3972 167 // wait that the module fetches an IP
samux 0:6ffb0aeb3972 168 if (dhcp) {
samux 0:6ffb0aeb3972 169 while(send("", 0, "DHCP=ON") == -1);
samux 0:6ffb0aeb3972 170 } else {
samux 0:6ffb0aeb3972 171 while(send("", 0, "Static") == -1);
samux 0:6ffb0aeb3972 172 }
samux 0:6ffb0aeb3972 173 flush();
samux 0:6ffb0aeb3972 174 cmd_mode = false;
samux 0:6ffb0aeb3972 175 return true;
samux 0:6ffb0aeb3972 176 }
samux 0:6ffb0aeb3972 177
samux 0:6ffb0aeb3972 178
samux 0:6ffb0aeb3972 179 void Wifly::flush() {
samux 0:6ffb0aeb3972 180 buf_wifly.flush();
samux 0:6ffb0aeb3972 181 }
samux 0:6ffb0aeb3972 182
samux 0:6ffb0aeb3972 183 bool Wifly::sendCommand(const char * cmd, const char * ack, char * res) {
samux 0:6ffb0aeb3972 184 if (!cmd_mode) {
samux 0:6ffb0aeb3972 185 cmdMode();
samux 0:6ffb0aeb3972 186 }
samux 0:6ffb0aeb3972 187 if (send(cmd, strlen(cmd), ack, res) == -1) {
samux 0:6ffb0aeb3972 188 ERR("sendCommand: cannot %s\r\n", cmd);
samux 0:6ffb0aeb3972 189 exit();
samux 0:6ffb0aeb3972 190 return false;
samux 0:6ffb0aeb3972 191 }
samux 0:6ffb0aeb3972 192 return true;
samux 0:6ffb0aeb3972 193 }
samux 0:6ffb0aeb3972 194
samux 0:6ffb0aeb3972 195 bool Wifly::cmdMode() {
samux 0:6ffb0aeb3972 196 if (send("$$$", 3, "CMD") == -1) {
samux 0:6ffb0aeb3972 197 ERR("cannot enter in cmd mode\r\n");
samux 0:6ffb0aeb3972 198 return false;
samux 0:6ffb0aeb3972 199 }
samux 0:6ffb0aeb3972 200 cmd_mode = true;
samux 0:6ffb0aeb3972 201 return true;
samux 0:6ffb0aeb3972 202 }
samux 0:6ffb0aeb3972 203
samux 0:6ffb0aeb3972 204 bool Wifly::leave() {
samux 0:6ffb0aeb3972 205 if (!sendCommand("leave\r", "DeAuth"))
samux 0:6ffb0aeb3972 206 return false;
samux 0:6ffb0aeb3972 207 exit();
samux 0:6ffb0aeb3972 208 return true;
samux 0:6ffb0aeb3972 209
samux 0:6ffb0aeb3972 210 }
samux 0:6ffb0aeb3972 211
samux 0:6ffb0aeb3972 212 bool Wifly::is_connected() {
samux 0:6ffb0aeb3972 213 return (tcp_status.read() == 1) ? true : false;
samux 0:6ffb0aeb3972 214 }
samux 0:6ffb0aeb3972 215
samux 0:6ffb0aeb3972 216
samux 0:6ffb0aeb3972 217 void Wifly::reset() {
samux 0:6ffb0aeb3972 218 reset_pin = 0;
samux 0:6ffb0aeb3972 219 wait(0.2);
samux 0:6ffb0aeb3972 220 reset_pin = 1;
samux 0:6ffb0aeb3972 221 wait(0.2);
samux 0:6ffb0aeb3972 222 }
samux 0:6ffb0aeb3972 223
samux 0:6ffb0aeb3972 224 bool Wifly::close() {
samux 0:6ffb0aeb3972 225 wait(0.25);
samux 0:6ffb0aeb3972 226 if (!cmdMode())
samux 0:6ffb0aeb3972 227 return false;
samux 0:6ffb0aeb3972 228 if (send("close\r", 6, "CLOS") == -1)
samux 0:6ffb0aeb3972 229 return false;
samux 0:6ffb0aeb3972 230 exit();
samux 0:6ffb0aeb3972 231 return true;
samux 0:6ffb0aeb3972 232 }
samux 0:6ffb0aeb3972 233
samux 0:6ffb0aeb3972 234
samux 0:6ffb0aeb3972 235 int Wifly::putc(char c) {
samux 0:6ffb0aeb3972 236 while (!wifi.writeable());
samux 0:6ffb0aeb3972 237 return wifi.putc(c);
samux 0:6ffb0aeb3972 238 }
samux 0:6ffb0aeb3972 239
samux 0:6ffb0aeb3972 240
samux 0:6ffb0aeb3972 241 bool Wifly::read(char * str) {
samux 0:6ffb0aeb3972 242 int length = buf_wifly.available();
samux 0:6ffb0aeb3972 243 if (length == 0)
samux 0:6ffb0aeb3972 244 return false;
samux 0:6ffb0aeb3972 245 for (int i = 0; i < length; i++)
samux 0:6ffb0aeb3972 246 buf_wifly.dequeue(&str[i]);
samux 0:6ffb0aeb3972 247 str[length] = 0;
samux 0:6ffb0aeb3972 248 return true;
samux 0:6ffb0aeb3972 249 }
samux 0:6ffb0aeb3972 250
samux 0:6ffb0aeb3972 251
samux 0:6ffb0aeb3972 252 bool Wifly::exit() {
samux 0:6ffb0aeb3972 253 flush();
samux 0:6ffb0aeb3972 254 if (send("exit\r", 5, "EXIT") == -1)
samux 0:6ffb0aeb3972 255 return false;
samux 0:6ffb0aeb3972 256 cmd_mode = false;
samux 0:6ffb0aeb3972 257 return true;
samux 0:6ffb0aeb3972 258 }
samux 0:6ffb0aeb3972 259
samux 0:6ffb0aeb3972 260
samux 0:6ffb0aeb3972 261 int Wifly::readable() {
samux 0:6ffb0aeb3972 262 return buf_wifly.available();
samux 0:6ffb0aeb3972 263 }
samux 0:6ffb0aeb3972 264
samux 0:6ffb0aeb3972 265 int Wifly::writeable() {
samux 0:6ffb0aeb3972 266 return wifi.writeable();
samux 0:6ffb0aeb3972 267 }
samux 0:6ffb0aeb3972 268
samux 0:6ffb0aeb3972 269 char Wifly::getc() {
samux 0:6ffb0aeb3972 270 char c;
samux 0:6ffb0aeb3972 271 while (!buf_wifly.available());
samux 0:6ffb0aeb3972 272 buf_wifly.dequeue(&c);
samux 0:6ffb0aeb3972 273 return c;
samux 0:6ffb0aeb3972 274 }
samux 0:6ffb0aeb3972 275
samux 0:6ffb0aeb3972 276 void Wifly::handler_rx(void) {
samux 0:6ffb0aeb3972 277 //read characters
samux 0:6ffb0aeb3972 278 while (wifi.readable())
samux 0:6ffb0aeb3972 279 buf_wifly.queue(wifi.getc());
samux 0:6ffb0aeb3972 280 }
samux 0:6ffb0aeb3972 281
samux 0:6ffb0aeb3972 282 void Wifly::attach_rx(bool callback) {
samux 0:6ffb0aeb3972 283 if (!callback)
samux 0:6ffb0aeb3972 284 wifi.attach(NULL);
samux 0:6ffb0aeb3972 285 else
samux 0:6ffb0aeb3972 286 wifi.attach(this, &Wifly::handler_rx);
samux 0:6ffb0aeb3972 287 }
samux 0:6ffb0aeb3972 288
samux 0:6ffb0aeb3972 289
samux 0:6ffb0aeb3972 290 int Wifly::send(const char * str, int len, const char * ACK, char * res) {
samux 0:6ffb0aeb3972 291 char read;
samux 0:6ffb0aeb3972 292 size_t found = string::npos;
samux 0:6ffb0aeb3972 293 string checking;
samux 0:6ffb0aeb3972 294 Timer tmr;
samux 0:6ffb0aeb3972 295 int result = 0;
samux 0:6ffb0aeb3972 296
samux 0:6ffb0aeb3972 297 DBG("will send: %s\r\n",str);
samux 0:6ffb0aeb3972 298
samux 0:6ffb0aeb3972 299 attach_rx(false);
samux 0:6ffb0aeb3972 300
samux 0:6ffb0aeb3972 301 //We flush the buffer
samux 0:6ffb0aeb3972 302 while (wifi.readable())
samux 0:6ffb0aeb3972 303 wifi.getc();
samux 0:6ffb0aeb3972 304
samux 0:6ffb0aeb3972 305 if (!ACK || !strcmp(ACK, "NO")) {
samux 0:6ffb0aeb3972 306 for (int i = 0; i < len; i++)
samux 0:6ffb0aeb3972 307 result = (putc(str[i]) == str[i]) ? result + 1 : result;
samux 0:6ffb0aeb3972 308 } else {
samux 0:6ffb0aeb3972 309 //We flush the buffer
samux 0:6ffb0aeb3972 310 while (wifi.readable())
samux 0:6ffb0aeb3972 311 wifi.getc();
samux 0:6ffb0aeb3972 312
samux 0:6ffb0aeb3972 313 tmr.start();
samux 0:6ffb0aeb3972 314 for (int i = 0; i < len; i++)
samux 0:6ffb0aeb3972 315 result = (putc(str[i]) == str[i]) ? result + 1 : result;
samux 0:6ffb0aeb3972 316
samux 0:6ffb0aeb3972 317 while (1) {
samux 0:6ffb0aeb3972 318 if (tmr.read() > 3) {
samux 0:6ffb0aeb3972 319 //We flush the buffer
samux 0:6ffb0aeb3972 320 while (wifi.readable())
samux 0:6ffb0aeb3972 321 wifi.getc();
samux 0:6ffb0aeb3972 322
samux 0:6ffb0aeb3972 323 DBG("check: %s\r\n", checking.c_str());
samux 0:6ffb0aeb3972 324
samux 0:6ffb0aeb3972 325 attach_rx(true);
samux 0:6ffb0aeb3972 326 return -1;
samux 0:6ffb0aeb3972 327 } else if (wifi.readable()) {
samux 0:6ffb0aeb3972 328 read = wifi.getc();
samux 0:6ffb0aeb3972 329 if ( read != '\r' && read != '\n') {
samux 0:6ffb0aeb3972 330 checking += read;
samux 0:6ffb0aeb3972 331 found = checking.find(ACK);
samux 0:6ffb0aeb3972 332 if (found != string::npos) {
samux 0:6ffb0aeb3972 333 wait(0.01);
samux 0:6ffb0aeb3972 334
samux 0:6ffb0aeb3972 335 //We flush the buffer
samux 0:6ffb0aeb3972 336 while (wifi.readable())
samux 0:6ffb0aeb3972 337 wifi.getc();
samux 0:6ffb0aeb3972 338
samux 0:6ffb0aeb3972 339 break;
samux 0:6ffb0aeb3972 340 }
samux 0:6ffb0aeb3972 341 }
samux 0:6ffb0aeb3972 342 }
samux 0:6ffb0aeb3972 343 }
samux 0:6ffb0aeb3972 344 DBG("check: %s\r\n", checking.c_str());
samux 0:6ffb0aeb3972 345
samux 0:6ffb0aeb3972 346 attach_rx(true);
samux 0:6ffb0aeb3972 347 return result;
samux 0:6ffb0aeb3972 348 }
samux 0:6ffb0aeb3972 349
samux 0:6ffb0aeb3972 350 //the user wants the result from the command (ACK == NULL, res != NULL)
samux 0:6ffb0aeb3972 351 if ( res != NULL) {
samux 0:6ffb0aeb3972 352 int i = 0;
samux 0:6ffb0aeb3972 353 Timer timeout;
samux 0:6ffb0aeb3972 354 timeout.start();
samux 0:6ffb0aeb3972 355 tmr.reset();
samux 0:6ffb0aeb3972 356 while (1) {
samux 0:6ffb0aeb3972 357 if (timeout.read() > 3) {
samux 0:6ffb0aeb3972 358 if (i == 0) {
samux 0:6ffb0aeb3972 359 res = NULL;
samux 0:6ffb0aeb3972 360 break;
samux 0:6ffb0aeb3972 361 }
samux 0:6ffb0aeb3972 362 res[i] = '\0';
samux 0:6ffb0aeb3972 363 DBG("user str 1: %s\r\n", res);
samux 0:6ffb0aeb3972 364
samux 0:6ffb0aeb3972 365 break;
samux 0:6ffb0aeb3972 366 } else {
samux 0:6ffb0aeb3972 367 if (tmr.read_ms() > 1000) {
samux 0:6ffb0aeb3972 368 res[i] = '\0';
samux 0:6ffb0aeb3972 369 DBG("user str: %s\r\n", res);
samux 0:6ffb0aeb3972 370
samux 0:6ffb0aeb3972 371 break;
samux 0:6ffb0aeb3972 372 }
samux 0:6ffb0aeb3972 373 if (wifi.readable()) {
samux 0:6ffb0aeb3972 374 tmr.start();
samux 0:6ffb0aeb3972 375 read = wifi.getc();
samux 0:6ffb0aeb3972 376
samux 0:6ffb0aeb3972 377 // we drop \r and \n
samux 0:6ffb0aeb3972 378 if ( read != '\r' && read != '\n') {
samux 0:6ffb0aeb3972 379 res[i++] = read;
samux 0:6ffb0aeb3972 380 }
samux 0:6ffb0aeb3972 381 }
samux 0:6ffb0aeb3972 382 }
samux 0:6ffb0aeb3972 383 }
samux 0:6ffb0aeb3972 384 DBG("user str: %s\r\n", res);
samux 0:6ffb0aeb3972 385 }
samux 0:6ffb0aeb3972 386
samux 0:6ffb0aeb3972 387 //We flush the buffer
samux 0:6ffb0aeb3972 388 while (wifi.readable())
samux 0:6ffb0aeb3972 389 wifi.getc();
samux 0:6ffb0aeb3972 390
samux 0:6ffb0aeb3972 391 attach_rx(true);
samux 0:6ffb0aeb3972 392 DBG("result: %d\r\n", result)
samux 0:6ffb0aeb3972 393 return result;
samux 0:6ffb0aeb3972 394 }