Thipawan Pairam / ESP8266

Project in FIBO

Fork of ESP8266 by Janhavi Kulkarni

ESP8266.cpp@4:8dfe0574a040, 2017-12-12 (annotated)

Committer:
Pairam
Date:
Tue Dec 12 11:39:55 2017 +0000
Revision:
4:8dfe0574a040
Parent:
3:4f24e7e803a1 
Project

Who changed what in which revision?

UserRevisionLine numberNew contents of line
quevedo 0:e58f27687450 1 #include "ESP8266.h"
janhavi 3:4f24e7e803a1 2 #define HTTPCMD "GET "
Pairam 4:8dfe0574a040 3 #define protocol " HTTP/1.1\n\n"
janhavi 3:4f24e7e803a1 4
quevedo 0:e58f27687450 5
quevedo 0:e58f27687450 6 // Constructor
Pairam 4:8dfe0574a040 7 ESP8266::ESP8266(PinName tx, PinName rx, int br) : comm(tx, rx)
Pairam 4:8dfe0574a040 8 {
quevedo 2:77388e8f0697 9 comm.baud(br);
quevedo 0:e58f27687450 10 }
quevedo 0:e58f27687450 11
quevedo 0:e58f27687450 12 // Destructor
quevedo 0:e58f27687450 13 ESP8266::~ESP8266() { }
quevedo 0:e58f27687450 14
quevedo 0:e58f27687450 15 // Add <CR> + <LF> at the end of the string
Pairam 4:8dfe0574a040 16 void ESP8266::AddEOL(char * s)
Pairam 4:8dfe0574a040 17 {
quevedo 0:e58f27687450 18 char k;
quevedo 0:e58f27687450 19 k = strlen(s); // Finds position of NULL character
quevedo 0:e58f27687450 20 s[k] = 0x0D; // switch NULL for <CR>
quevedo 0:e58f27687450 21 s[k + 1] = 0x0A; // Add <LF>
quevedo 0:e58f27687450 22 s[k + 2] = 0; // Add NULL at the end
quevedo 0:e58f27687450 23 }
quevedo 0:e58f27687450 24
quevedo 0:e58f27687450 25 // Add one ASCII character at the end of the string
Pairam 4:8dfe0574a040 26 void ESP8266::AddChar(char * s, char c)
Pairam 4:8dfe0574a040 27 {
quevedo 0:e58f27687450 28 char k;
quevedo 0:e58f27687450 29 k = strlen(s);
quevedo 0:e58f27687450 30 s[k] = c;
quevedo 0:e58f27687450 31 s[k + 1] = 0;
quevedo 0:e58f27687450 32 }
quevedo 0:e58f27687450 33
quevedo 2:77388e8f0697 34 // Converts integer number to null-terminated string
Pairam 4:8dfe0574a040 35 void ESP8266::itoa(int n, char * s)
Pairam 4:8dfe0574a040 36 {
quevedo 2:77388e8f0697 37 char k = 0;
quevedo 2:77388e8f0697 38 char r[11];
Pairam 4:8dfe0574a040 39
quevedo 2:77388e8f0697 40 if(n == 0) {
quevedo 2:77388e8f0697 41 s[0] = '0';
quevedo 2:77388e8f0697 42 s[1] = 0;
quevedo 2:77388e8f0697 43 } else {
quevedo 2:77388e8f0697 44 while(n != 0) {
quevedo 2:77388e8f0697 45 r[k]= (n % 10) + '0';
quevedo 2:77388e8f0697 46 n = n / 10;
quevedo 2:77388e8f0697 47 k++;
quevedo 2:77388e8f0697 48 }
quevedo 2:77388e8f0697 49 while(k > 0) {
quevedo 2:77388e8f0697 50 s[n] = r[k - 1] + '0';
quevedo 2:77388e8f0697 51 n++;
quevedo 2:77388e8f0697 52 k--;
quevedo 2:77388e8f0697 53 }
quevedo 2:77388e8f0697 54 s[n] = 0;
quevedo 2:77388e8f0697 55 }
quevedo 2:77388e8f0697 56 }
quevedo 2:77388e8f0697 57
quevedo 0:e58f27687450 58 // Sends command to ESP8266. Receives the command string
Pairam 4:8dfe0574a040 59 void ESP8266::SendCMD(char * s)
Pairam 4:8dfe0574a040 60 {
quevedo 0:e58f27687450 61 AddEOL(s);
quevedo 0:e58f27687450 62 comm.printf("%s", s);
quevedo 0:e58f27687450 63 }
quevedo 0:e58f27687450 64
quevedo 0:e58f27687450 65 // Resets the ESP8266
Pairam 4:8dfe0574a040 66 void ESP8266::Reset(void)
Pairam 4:8dfe0574a040 67 {
quevedo 0:e58f27687450 68 char rs[10];
quevedo 0:e58f27687450 69 strcpy(rs, "AT+RST");
quevedo 0:e58f27687450 70 SendCMD(rs);
quevedo 0:e58f27687450 71 }
quevedo 0:e58f27687450 72
quevedo 0:e58f27687450 73 // Receive reply until no character is received after a given timeout in miliseconds
Pairam 4:8dfe0574a040 74 bool ESP8266::RcvReply(char * r, int to)
Pairam 4:8dfe0574a040 75 {
quevedo 0:e58f27687450 76 Timer t;
quevedo 0:e58f27687450 77 bool ended = 0;
quevedo 0:e58f27687450 78 char c;
Pairam 4:8dfe0574a040 79
quevedo 0:e58f27687450 80 strcpy(r, "");
quevedo 0:e58f27687450 81 t.start();
quevedo 0:e58f27687450 82 while(!ended) {
quevedo 0:e58f27687450 83 if(comm.readable()) {
quevedo 0:e58f27687450 84 c = comm.getc();
quevedo 0:e58f27687450 85 AddChar(r, c);
quevedo 0:e58f27687450 86 t.start();
quevedo 0:e58f27687450 87 }
quevedo 0:e58f27687450 88 if(t.read_ms() > to) {
Pairam 4:8dfe0574a040 89 ended = 1;
quevedo 0:e58f27687450 90 }
quevedo 0:e58f27687450 91 }
quevedo 0:e58f27687450 92 AddChar(r, 0x00);
janhavi 3:4f24e7e803a1 93 return ended;
quevedo 0:e58f27687450 94 }
quevedo 0:e58f27687450 95
quevedo 0:e58f27687450 96 // Gets the AP list. Parameter: the string to receive the list
Pairam 4:8dfe0574a040 97 void ESP8266::GetList(char * l)
Pairam 4:8dfe0574a040 98 {
quevedo 0:e58f27687450 99 char rs[15];
quevedo 0:e58f27687450 100 strcpy(rs, "AT+CWLAP");
quevedo 0:e58f27687450 101 SendCMD(rs);
quevedo 0:e58f27687450 102 RcvReply(l, 5000); // Needs big timeout because it takes long to start replying
quevedo 0:e58f27687450 103 }
quevedo 0:e58f27687450 104
quevedo 0:e58f27687450 105 // Joins a Wifi AP. Parameters: SSID and Password (strings)
Pairam 4:8dfe0574a040 106 void ESP8266::Join(char * id, char * pwd)
Pairam 4:8dfe0574a040 107 {
quevedo 0:e58f27687450 108 char cmd[255];
quevedo 0:e58f27687450 109 strcpy(cmd, "AT+CWJAP=");
quevedo 0:e58f27687450 110 AddChar(cmd, 0x22);
quevedo 0:e58f27687450 111 strcat(cmd, id);
quevedo 0:e58f27687450 112 AddChar(cmd, 0x22);
quevedo 0:e58f27687450 113 AddChar(cmd, 0x2C);
quevedo 0:e58f27687450 114 AddChar(cmd, 0x22);
quevedo 0:e58f27687450 115 strcat(cmd, pwd);
quevedo 0:e58f27687450 116 AddChar(cmd, 0x22);
quevedo 0:e58f27687450 117 SendCMD(cmd);
quevedo 0:e58f27687450 118 }
quevedo 0:e58f27687450 119
quevedo 0:e58f27687450 120 // Gets ESP IP. Parameter: string to contain IP
Pairam 4:8dfe0574a040 121 void ESP8266::GetIP(char * ip)
Pairam 4:8dfe0574a040 122 {
quevedo 0:e58f27687450 123 char cmd[15];
quevedo 0:e58f27687450 124 strcpy(cmd, "AT+CIFSR");
quevedo 0:e58f27687450 125 SendCMD(cmd);
quevedo 0:e58f27687450 126 RcvReply(ip, 2000);
quevedo 1:399414d48048 127 }
quevedo 1:399414d48048 128
Pairam 4:8dfe0574a040 129 void ESP8266::GetCon(char * ipp)
Pairam 4:8dfe0574a040 130 {
Pairam 4:8dfe0574a040 131 char cmd[15];
Pairam 4:8dfe0574a040 132 strcpy(cmd, "AT+CWJAP?");
Pairam 4:8dfe0574a040 133 SendCMD(cmd);
Pairam 4:8dfe0574a040 134 RcvReply(ipp, 2000);
Pairam 4:8dfe0574a040 135 }
Pairam 4:8dfe0574a040 136
quevedo 1:399414d48048 137 //Defines wifi mode; Parameter: mode; 1= STA, 2= AP, 3=both
Pairam 4:8dfe0574a040 138 void ESP8266::SetMode(char mode)
Pairam 4:8dfe0574a040 139 {
quevedo 1:399414d48048 140 char cmd[15];
quevedo 1:399414d48048 141 strcpy(cmd, "AT+CWMODE=");
quevedo 1:399414d48048 142 mode = mode + 0x30; // Converts number into corresponding ASCII character
quevedo 1:399414d48048 143 AddChar(cmd, mode); // Completes command string
quevedo 1:399414d48048 144 SendCMD(cmd);
quevedo 1:399414d48048 145 }
Pairam 4:8dfe0574a040 146 void ESP8266::Check(char * i)
Pairam 4:8dfe0574a040 147 {
Pairam 4:8dfe0574a040 148 char cmd[15];
Pairam 4:8dfe0574a040 149 if(comm.readable()) {
Pairam 4:8dfe0574a040 150 comm.gets(cmd,100);}
Pairam 4:8dfe0574a040 151 strcpy(i,cmd);
Pairam 4:8dfe0574a040 152
Pairam 4:8dfe0574a040 153 }
quevedo 1:399414d48048 154
quevedo 1:399414d48048 155 // Quits the AP
Pairam 4:8dfe0574a040 156 void ESP8266::Quit(void)
Pairam 4:8dfe0574a040 157 {
quevedo 1:399414d48048 158 char cmd[15];
quevedo 1:399414d48048 159 strcpy(cmd, "AT+CWQAP");
quevedo 1:399414d48048 160 SendCMD(cmd);
quevedo 1:399414d48048 161 }
quevedo 1:399414d48048 162
quevedo 1:399414d48048 163 // Sets single connection
Pairam 4:8dfe0574a040 164 void ESP8266::SetSingle(void)
Pairam 4:8dfe0574a040 165 {
quevedo 1:399414d48048 166 char cmd[15];
quevedo 1:399414d48048 167 strcpy(cmd, "AT+CIPMUX=0");
quevedo 1:399414d48048 168 SendCMD(cmd);
quevedo 1:399414d48048 169 }
quevedo 1:399414d48048 170
quevedo 1:399414d48048 171 // Sets multiple connection
Pairam 4:8dfe0574a040 172 void ESP8266::SetMultiple(void)
Pairam 4:8dfe0574a040 173 {
quevedo 1:399414d48048 174 char rs[15];
quevedo 1:399414d48048 175 strcpy(rs, "AT+CIPMUX=1");
quevedo 1:399414d48048 176 SendCMD(rs);
quevedo 2:77388e8f0697 177 }
Pairam 4:8dfe0574a040 178 void ESP8266::Close(void)
Pairam 4:8dfe0574a040 179 {
Pairam 4:8dfe0574a040 180 char rs[15];
Pairam 4:8dfe0574a040 181 strcpy(rs, "AT+CIPCLOSE");
Pairam 4:8dfe0574a040 182 SendCMD(rs);
Pairam 4:8dfe0574a040 183 }
Pairam 4:8dfe0574a040 184 void ESP8266::Disconnect(void)
Pairam 4:8dfe0574a040 185 {
Pairam 4:8dfe0574a040 186 char rs[15];
Pairam 4:8dfe0574a040 187 strcpy(rs, "AT+CWQAP");
Pairam 4:8dfe0574a040 188 SendCMD(rs);
Pairam 4:8dfe0574a040 189 }
quevedo 2:77388e8f0697 190
quevedo 2:77388e8f0697 191 // Gets connection status. Parameter: string to contain status
Pairam 4:8dfe0574a040 192 void ESP8266::GetConnStatus(char * st)
Pairam 4:8dfe0574a040 193 {
quevedo 2:77388e8f0697 194 char cmd[15];
quevedo 2:77388e8f0697 195 strcpy(cmd, "AT+CIPSTATUS");
quevedo 2:77388e8f0697 196 SendCMD(cmd);
quevedo 2:77388e8f0697 197 RcvReply(st, 2000);
quevedo 2:77388e8f0697 198 }
quevedo 2:77388e8f0697 199
quevedo 2:77388e8f0697 200 // Starts server mode. Parameter: port to be used
Pairam 4:8dfe0574a040 201 void ESP8266::StartServerMode(int port)
Pairam 4:8dfe0574a040 202 {
quevedo 2:77388e8f0697 203 char rs[25];
quevedo 2:77388e8f0697 204 char t[4];
quevedo 2:77388e8f0697 205 strcpy(rs, "AT+CIPSERVER=1,");
quevedo 2:77388e8f0697 206 itoa(port, t);
quevedo 2:77388e8f0697 207 strcat(rs, t);
quevedo 2:77388e8f0697 208 SendCMD(rs);
quevedo 2:77388e8f0697 209 }
quevedo 2:77388e8f0697 210
quevedo 2:77388e8f0697 211 // Close server mode.
Pairam 4:8dfe0574a040 212 void ESP8266::CloseServerMode(void)
Pairam 4:8dfe0574a040 213 {
quevedo 2:77388e8f0697 214 char rs[20];
quevedo 2:77388e8f0697 215 strcpy(rs, "AT+CIPSERVER=0");
quevedo 2:77388e8f0697 216 SendCMD(rs);
janhavi 3:4f24e7e803a1 217 }
janhavi 3:4f24e7e803a1 218
Pairam 4:8dfe0574a040 219 void ESP8266::setTransparent(void)
Pairam 4:8dfe0574a040 220 {
janhavi 3:4f24e7e803a1 221 char rs[20];
janhavi 3:4f24e7e803a1 222 strcpy(rs, "AT+CIPMODE=0");
janhavi 3:4f24e7e803a1 223 SendCMD(rs);
janhavi 3:4f24e7e803a1 224 }
janhavi 3:4f24e7e803a1 225
Pairam 4:8dfe0574a040 226 void ESP8266::startTCPConn(char *IP, int port, char * data )
Pairam 4:8dfe0574a040 227 {
janhavi 3:4f24e7e803a1 228 char rs[100];
Pairam 4:8dfe0574a040 229 sprintf(rs, "AT+CIPSTART=4,\"TCP\",\"%s\",%d", IP, port);
janhavi 3:4f24e7e803a1 230 SendCMD(rs);
Pairam 4:8dfe0574a040 231 RcvReply(data, 5000);
Pairam 4:8dfe0574a040 232
janhavi 3:4f24e7e803a1 233 }
janhavi 3:4f24e7e803a1 234
janhavi 3:4f24e7e803a1 235 void ESP8266::sendURL(char *URL, char *command){
janhavi 3:4f24e7e803a1 236 char url[300], snd[300], http_cmd[300];
janhavi 3:4f24e7e803a1 237
janhavi 3:4f24e7e803a1 238 strcpy(http_cmd, HTTPCMD);
janhavi 3:4f24e7e803a1 239
janhavi 3:4f24e7e803a1 240 strcat(http_cmd, URL);
janhavi 3:4f24e7e803a1 241
janhavi 3:4f24e7e803a1 242 strcpy(url, http_cmd);
Pairam 4:8dfe0574a040 243 sprintf(snd,"AT+CIPSEND=4,%d",strlen(url));
janhavi 3:4f24e7e803a1 244 strcpy(command, url);
janhavi 3:4f24e7e803a1 245 SendCMD(snd);
janhavi 3:4f24e7e803a1 246 SendCMD(url);
janhavi 3:4f24e7e803a1 247 }
Pairam 4:8dfe0574a040 248
Pairam 4:8dfe0574a040 249
Pairam 4:8dfe0574a040 250 void ESP8266::sendURL(char *URL, char *command, char * data)
Pairam 4:8dfe0574a040 251 {
Pairam 4:8dfe0574a040 252 char url[300], snd[300], http_cmd[300];
Pairam 4:8dfe0574a040 253
Pairam 4:8dfe0574a040 254 strcpy(http_cmd, HTTPCMD);
Pairam 4:8dfe0574a040 255 strcat(http_cmd, URL);
Pairam 4:8dfe0574a040 256 strcpy(url, http_cmd);
janhavi 3:4f24e7e803a1 257
Pairam 4:8dfe0574a040 258
Pairam 4:8dfe0574a040 259 sprintf(snd,"AT+CIPSEND=4,%d",strlen(url));
Pairam 4:8dfe0574a040 260 strcpy(command, url);
Pairam 4:8dfe0574a040 261 SendCMD(snd);
Pairam 4:8dfe0574a040 262 SendCMD(url);
Pairam 4:8dfe0574a040 263 RcvReply(data, 15000);
Pairam 4:8dfe0574a040 264 }
Pairam 4:8dfe0574a040 265
Pairam 4:8dfe0574a040 266