ESP8266 library to get and send data.
Fork of ESP8266 by
ESP8266.cpp@3:4f24e7e803a1, 2016-06-11 (annotated)
- Committer:
- janhavi
- Date:
- Sat Jun 11 14:05:06 2016 +0000
- Revision:
- 3:4f24e7e803a1
- Parent:
- 2:77388e8f0697
- Child:
- 4:c05f7a1b4e47
Changes in ESP library
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
quevedo | 0:e58f27687450 | 1 | #include "ESP8266.h" |
janhavi | 3:4f24e7e803a1 | 2 | #define HTTPCMD "GET " |
janhavi | 3:4f24e7e803a1 | 3 | #define protocol " HTTP/1.0\n\n" |
janhavi | 3:4f24e7e803a1 | 4 | |
quevedo | 0:e58f27687450 | 5 | |
quevedo | 0:e58f27687450 | 6 | // Constructor |
quevedo | 2:77388e8f0697 | 7 | ESP8266::ESP8266(PinName tx, PinName rx, int br) : comm(tx, rx) { |
quevedo | 2:77388e8f0697 | 8 | comm.baud(br); |
quevedo | 0:e58f27687450 | 9 | } |
quevedo | 0:e58f27687450 | 10 | |
quevedo | 0:e58f27687450 | 11 | // Destructor |
quevedo | 0:e58f27687450 | 12 | ESP8266::~ESP8266() { } |
quevedo | 0:e58f27687450 | 13 | |
quevedo | 0:e58f27687450 | 14 | // Add <CR> + <LF> at the end of the string |
quevedo | 0:e58f27687450 | 15 | void ESP8266::AddEOL(char * s) { |
quevedo | 0:e58f27687450 | 16 | char k; |
quevedo | 0:e58f27687450 | 17 | k = strlen(s); // Finds position of NULL character |
quevedo | 0:e58f27687450 | 18 | s[k] = 0x0D; // switch NULL for <CR> |
quevedo | 0:e58f27687450 | 19 | s[k + 1] = 0x0A; // Add <LF> |
quevedo | 0:e58f27687450 | 20 | s[k + 2] = 0; // Add NULL at the end |
quevedo | 0:e58f27687450 | 21 | } |
quevedo | 0:e58f27687450 | 22 | |
quevedo | 0:e58f27687450 | 23 | // Add one ASCII character at the end of the string |
quevedo | 0:e58f27687450 | 24 | void ESP8266::AddChar(char * s, char c) { |
quevedo | 0:e58f27687450 | 25 | char k; |
quevedo | 0:e58f27687450 | 26 | k = strlen(s); |
quevedo | 0:e58f27687450 | 27 | s[k] = c; |
quevedo | 0:e58f27687450 | 28 | s[k + 1] = 0; |
quevedo | 0:e58f27687450 | 29 | } |
quevedo | 0:e58f27687450 | 30 | |
quevedo | 2:77388e8f0697 | 31 | // Converts integer number to null-terminated string |
quevedo | 2:77388e8f0697 | 32 | void ESP8266::itoa(int n, char * s) { |
quevedo | 2:77388e8f0697 | 33 | char k = 0; |
quevedo | 2:77388e8f0697 | 34 | char r[11]; |
quevedo | 2:77388e8f0697 | 35 | |
quevedo | 2:77388e8f0697 | 36 | if(n == 0) { |
quevedo | 2:77388e8f0697 | 37 | s[0] = '0'; |
quevedo | 2:77388e8f0697 | 38 | s[1] = 0; |
quevedo | 2:77388e8f0697 | 39 | } else { |
quevedo | 2:77388e8f0697 | 40 | while(n != 0) { |
quevedo | 2:77388e8f0697 | 41 | r[k]= (n % 10) + '0'; |
quevedo | 2:77388e8f0697 | 42 | n = n / 10; |
quevedo | 2:77388e8f0697 | 43 | k++; |
quevedo | 2:77388e8f0697 | 44 | } |
quevedo | 2:77388e8f0697 | 45 | while(k > 0) { |
quevedo | 2:77388e8f0697 | 46 | s[n] = r[k - 1] + '0'; |
quevedo | 2:77388e8f0697 | 47 | n++; |
quevedo | 2:77388e8f0697 | 48 | k--; |
quevedo | 2:77388e8f0697 | 49 | } |
quevedo | 2:77388e8f0697 | 50 | s[n] = 0; |
quevedo | 2:77388e8f0697 | 51 | } |
quevedo | 2:77388e8f0697 | 52 | } |
quevedo | 2:77388e8f0697 | 53 | |
quevedo | 0:e58f27687450 | 54 | // Sends command to ESP8266. Receives the command string |
quevedo | 0:e58f27687450 | 55 | void ESP8266::SendCMD(char * s) { |
quevedo | 0:e58f27687450 | 56 | AddEOL(s); |
quevedo | 0:e58f27687450 | 57 | comm.printf("%s", s); |
quevedo | 0:e58f27687450 | 58 | } |
quevedo | 0:e58f27687450 | 59 | |
quevedo | 0:e58f27687450 | 60 | // Resets the ESP8266 |
quevedo | 0:e58f27687450 | 61 | void ESP8266::Reset(void) { |
quevedo | 0:e58f27687450 | 62 | char rs[10]; |
quevedo | 0:e58f27687450 | 63 | strcpy(rs, "AT+RST"); |
quevedo | 0:e58f27687450 | 64 | SendCMD(rs); |
quevedo | 0:e58f27687450 | 65 | } |
quevedo | 0:e58f27687450 | 66 | |
quevedo | 0:e58f27687450 | 67 | // Receive reply until no character is received after a given timeout in miliseconds |
janhavi | 3:4f24e7e803a1 | 68 | bool ESP8266::RcvReply(char * r, int to) { |
quevedo | 0:e58f27687450 | 69 | Timer t; |
quevedo | 0:e58f27687450 | 70 | bool ended = 0; |
quevedo | 0:e58f27687450 | 71 | char c; |
quevedo | 0:e58f27687450 | 72 | |
quevedo | 0:e58f27687450 | 73 | strcpy(r, ""); |
quevedo | 0:e58f27687450 | 74 | t.start(); |
quevedo | 0:e58f27687450 | 75 | while(!ended) { |
quevedo | 0:e58f27687450 | 76 | if(comm.readable()) { |
quevedo | 0:e58f27687450 | 77 | c = comm.getc(); |
quevedo | 0:e58f27687450 | 78 | AddChar(r, c); |
quevedo | 0:e58f27687450 | 79 | t.start(); |
quevedo | 0:e58f27687450 | 80 | } |
quevedo | 0:e58f27687450 | 81 | if(t.read_ms() > to) { |
quevedo | 0:e58f27687450 | 82 | ended = 1; |
quevedo | 0:e58f27687450 | 83 | } |
quevedo | 0:e58f27687450 | 84 | } |
quevedo | 0:e58f27687450 | 85 | AddChar(r, 0x00); |
janhavi | 3:4f24e7e803a1 | 86 | return ended; |
quevedo | 0:e58f27687450 | 87 | } |
quevedo | 0:e58f27687450 | 88 | |
quevedo | 0:e58f27687450 | 89 | // Gets the AP list. Parameter: the string to receive the list |
quevedo | 0:e58f27687450 | 90 | void ESP8266::GetList(char * l) { |
quevedo | 0:e58f27687450 | 91 | char rs[15]; |
quevedo | 0:e58f27687450 | 92 | strcpy(rs, "AT+CWLAP"); |
quevedo | 0:e58f27687450 | 93 | SendCMD(rs); |
quevedo | 0:e58f27687450 | 94 | RcvReply(l, 5000); // Needs big timeout because it takes long to start replying |
quevedo | 0:e58f27687450 | 95 | } |
quevedo | 0:e58f27687450 | 96 | |
quevedo | 0:e58f27687450 | 97 | // Joins a Wifi AP. Parameters: SSID and Password (strings) |
quevedo | 0:e58f27687450 | 98 | void ESP8266::Join(char * id, char * pwd) { |
quevedo | 0:e58f27687450 | 99 | char cmd[255]; |
quevedo | 0:e58f27687450 | 100 | strcpy(cmd, "AT+CWJAP="); |
quevedo | 0:e58f27687450 | 101 | AddChar(cmd, 0x22); |
quevedo | 0:e58f27687450 | 102 | strcat(cmd, id); |
quevedo | 0:e58f27687450 | 103 | AddChar(cmd, 0x22); |
quevedo | 0:e58f27687450 | 104 | AddChar(cmd, 0x2C); |
quevedo | 0:e58f27687450 | 105 | AddChar(cmd, 0x22); |
quevedo | 0:e58f27687450 | 106 | strcat(cmd, pwd); |
quevedo | 0:e58f27687450 | 107 | AddChar(cmd, 0x22); |
quevedo | 0:e58f27687450 | 108 | SendCMD(cmd); |
quevedo | 0:e58f27687450 | 109 | } |
quevedo | 0:e58f27687450 | 110 | |
quevedo | 0:e58f27687450 | 111 | // Gets ESP IP. Parameter: string to contain IP |
quevedo | 0:e58f27687450 | 112 | void ESP8266::GetIP(char * ip) { |
quevedo | 0:e58f27687450 | 113 | char cmd[15]; |
quevedo | 0:e58f27687450 | 114 | strcpy(cmd, "AT+CIFSR"); |
quevedo | 0:e58f27687450 | 115 | SendCMD(cmd); |
quevedo | 0:e58f27687450 | 116 | RcvReply(ip, 2000); |
quevedo | 1:399414d48048 | 117 | } |
quevedo | 1:399414d48048 | 118 | |
quevedo | 1:399414d48048 | 119 | //Defines wifi mode; Parameter: mode; 1= STA, 2= AP, 3=both |
quevedo | 1:399414d48048 | 120 | void ESP8266::SetMode(char mode) { |
quevedo | 1:399414d48048 | 121 | char cmd[15]; |
quevedo | 1:399414d48048 | 122 | strcpy(cmd, "AT+CWMODE="); |
quevedo | 1:399414d48048 | 123 | mode = mode + 0x30; // Converts number into corresponding ASCII character |
quevedo | 1:399414d48048 | 124 | AddChar(cmd, mode); // Completes command string |
quevedo | 1:399414d48048 | 125 | SendCMD(cmd); |
quevedo | 1:399414d48048 | 126 | } |
quevedo | 1:399414d48048 | 127 | |
quevedo | 1:399414d48048 | 128 | // Quits the AP |
quevedo | 1:399414d48048 | 129 | void ESP8266::Quit(void) { |
quevedo | 1:399414d48048 | 130 | char cmd[15]; |
quevedo | 1:399414d48048 | 131 | strcpy(cmd, "AT+CWQAP"); |
quevedo | 1:399414d48048 | 132 | SendCMD(cmd); |
quevedo | 1:399414d48048 | 133 | } |
quevedo | 1:399414d48048 | 134 | |
quevedo | 1:399414d48048 | 135 | // Sets single connection |
quevedo | 1:399414d48048 | 136 | void ESP8266::SetSingle(void) { |
quevedo | 1:399414d48048 | 137 | char cmd[15]; |
quevedo | 1:399414d48048 | 138 | strcpy(cmd, "AT+CIPMUX=0"); |
quevedo | 1:399414d48048 | 139 | SendCMD(cmd); |
quevedo | 1:399414d48048 | 140 | } |
quevedo | 1:399414d48048 | 141 | |
quevedo | 1:399414d48048 | 142 | // Sets multiple connection |
quevedo | 1:399414d48048 | 143 | void ESP8266::SetMultiple(void) { |
quevedo | 1:399414d48048 | 144 | char rs[15]; |
quevedo | 1:399414d48048 | 145 | strcpy(rs, "AT+CIPMUX=1"); |
quevedo | 1:399414d48048 | 146 | SendCMD(rs); |
quevedo | 2:77388e8f0697 | 147 | } |
quevedo | 2:77388e8f0697 | 148 | |
quevedo | 2:77388e8f0697 | 149 | // Gets connection status. Parameter: string to contain status |
quevedo | 2:77388e8f0697 | 150 | void ESP8266::GetConnStatus(char * st) { |
quevedo | 2:77388e8f0697 | 151 | char cmd[15]; |
quevedo | 2:77388e8f0697 | 152 | strcpy(cmd, "AT+CIPSTATUS"); |
quevedo | 2:77388e8f0697 | 153 | SendCMD(cmd); |
quevedo | 2:77388e8f0697 | 154 | RcvReply(st, 2000); |
quevedo | 2:77388e8f0697 | 155 | } |
quevedo | 2:77388e8f0697 | 156 | |
quevedo | 2:77388e8f0697 | 157 | // Starts server mode. Parameter: port to be used |
quevedo | 2:77388e8f0697 | 158 | void ESP8266::StartServerMode(int port) { |
quevedo | 2:77388e8f0697 | 159 | char rs[25]; |
quevedo | 2:77388e8f0697 | 160 | char t[4]; |
quevedo | 2:77388e8f0697 | 161 | strcpy(rs, "AT+CIPSERVER=1,"); |
quevedo | 2:77388e8f0697 | 162 | itoa(port, t); |
quevedo | 2:77388e8f0697 | 163 | strcat(rs, t); |
quevedo | 2:77388e8f0697 | 164 | SendCMD(rs); |
quevedo | 2:77388e8f0697 | 165 | } |
quevedo | 2:77388e8f0697 | 166 | |
quevedo | 2:77388e8f0697 | 167 | // Close server mode. |
quevedo | 2:77388e8f0697 | 168 | void ESP8266::CloseServerMode(void) { |
quevedo | 2:77388e8f0697 | 169 | char rs[20]; |
quevedo | 2:77388e8f0697 | 170 | strcpy(rs, "AT+CIPSERVER=0"); |
quevedo | 2:77388e8f0697 | 171 | SendCMD(rs); |
janhavi | 3:4f24e7e803a1 | 172 | } |
janhavi | 3:4f24e7e803a1 | 173 | |
janhavi | 3:4f24e7e803a1 | 174 | void ESP8266::setTransparent(void){ |
janhavi | 3:4f24e7e803a1 | 175 | char rs[20]; |
janhavi | 3:4f24e7e803a1 | 176 | strcpy(rs, "AT+CIPMODE=0"); |
janhavi | 3:4f24e7e803a1 | 177 | SendCMD(rs); |
janhavi | 3:4f24e7e803a1 | 178 | } |
janhavi | 3:4f24e7e803a1 | 179 | |
janhavi | 3:4f24e7e803a1 | 180 | void ESP8266::startTCPConn(char *IP, int port){ |
janhavi | 3:4f24e7e803a1 | 181 | char rs[100]; |
janhavi | 3:4f24e7e803a1 | 182 | sprintf(rs, "AT+CIPSTART=\"TCP\",\"%s\",%d", IP, port); |
janhavi | 3:4f24e7e803a1 | 183 | SendCMD(rs); |
janhavi | 3:4f24e7e803a1 | 184 | } |
janhavi | 3:4f24e7e803a1 | 185 | |
janhavi | 3:4f24e7e803a1 | 186 | void ESP8266::sendURL(char *URL, char *command){ |
janhavi | 3:4f24e7e803a1 | 187 | char url[300], snd[300], http_cmd[300]; |
janhavi | 3:4f24e7e803a1 | 188 | |
janhavi | 3:4f24e7e803a1 | 189 | strcpy(http_cmd, HTTPCMD); |
janhavi | 3:4f24e7e803a1 | 190 | |
janhavi | 3:4f24e7e803a1 | 191 | strcat(http_cmd, URL); |
janhavi | 3:4f24e7e803a1 | 192 | strcat(http_cmd, protocol); |
janhavi | 3:4f24e7e803a1 | 193 | |
janhavi | 3:4f24e7e803a1 | 194 | strcpy(url, http_cmd); |
janhavi | 3:4f24e7e803a1 | 195 | sprintf(snd,"AT+CIPSENDEX=%d",strlen(url)); |
janhavi | 3:4f24e7e803a1 | 196 | strcpy(command, url); |
janhavi | 3:4f24e7e803a1 | 197 | SendCMD(snd); |
janhavi | 3:4f24e7e803a1 | 198 | wait(3); |
janhavi | 3:4f24e7e803a1 | 199 | SendCMD(url); |
janhavi | 3:4f24e7e803a1 | 200 | } |
janhavi | 3:4f24e7e803a1 | 201 | |
janhavi | 3:4f24e7e803a1 | 202 |