William Thenaers / ESP8266

ESP8266 library to get and send data.

Fork of ESP8266 by Janhavi Kulkarni

ESP8266.cpp@4:c05f7a1b4e47, 2016-10-21 (annotated)

Committer:
Wosser1sProductions
Date:
Fri Oct 21 16:33:31 2016 +0000
Revision:
4:c05f7a1b4e47
Parent:
3:4f24e7e803a1
Child:
5:5cc7894bb8cb
First commit of ESP8266 control library.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
quevedo 0:e58f27687450 1 #include "ESP8266.h"
quevedo 0:e58f27687450 2
quevedo 0:e58f27687450 3 // Constructor
quevedo 2:77388e8f0697 4 ESP8266::ESP8266(PinName tx, PinName rx, int br) : comm(tx, rx) {
quevedo 2:77388e8f0697 5 comm.baud(br);
quevedo 0:e58f27687450 6 }
quevedo 0:e58f27687450 7
quevedo 0:e58f27687450 8 // Destructor
quevedo 0:e58f27687450 9 ESP8266::~ESP8266() { }
quevedo 0:e58f27687450 10
quevedo 0:e58f27687450 11 // Add <CR> + <LF> at the end of the string
quevedo 0:e58f27687450 12 void ESP8266::AddEOL(char * s) {
Wosser1sProductions 4:c05f7a1b4e47 13 char k = strlen(s); // Finds position of NULL character
Wosser1sProductions 4:c05f7a1b4e47 14 s[k] = '\r'; // switch NULL for <CR>
Wosser1sProductions 4:c05f7a1b4e47 15 s[k + 1] = '\n'; // Add <LF>
Wosser1sProductions 4:c05f7a1b4e47 16 s[k + 2] = '\0'; // Add NULL at the end
quevedo 0:e58f27687450 17 }
quevedo 0:e58f27687450 18
quevedo 0:e58f27687450 19 // Add one ASCII character at the end of the string
quevedo 0:e58f27687450 20 void ESP8266::AddChar(char * s, char c) {
Wosser1sProductions 4:c05f7a1b4e47 21 char k = strlen(s);
Wosser1sProductions 4:c05f7a1b4e47 22 s[k] = c;
Wosser1sProductions 4:c05f7a1b4e47 23 s[k + 1] = '\0';
quevedo 2:77388e8f0697 24 }
quevedo 2:77388e8f0697 25
quevedo 0:e58f27687450 26 // Sends command to ESP8266. Receives the command string
Wosser1sProductions 4:c05f7a1b4e47 27 void ESP8266::SendCMD(char* s) {
Wosser1sProductions 4:c05f7a1b4e47 28 comm.printf("%s%s", s, CMD_END);
quevedo 0:e58f27687450 29 }
quevedo 0:e58f27687450 30
quevedo 0:e58f27687450 31 // Resets the ESP8266
quevedo 0:e58f27687450 32 void ESP8266::Reset(void) {
Wosser1sProductions 4:c05f7a1b4e47 33 SendCMD("AT+RST");
quevedo 0:e58f27687450 34 }
quevedo 0:e58f27687450 35
quevedo 0:e58f27687450 36 // Receive reply until no character is received after a given timeout in miliseconds
Wosser1sProductions 4:c05f7a1b4e47 37 bool ESP8266::RcvReply(char* r, int to) {
quevedo 0:e58f27687450 38 Timer t;
quevedo 0:e58f27687450 39 strcpy(r, "");
quevedo 0:e58f27687450 40 t.start();
Wosser1sProductions 4:c05f7a1b4e47 41
Wosser1sProductions 4:c05f7a1b4e47 42 do {
quevedo 0:e58f27687450 43 if(comm.readable()) {
Wosser1sProductions 4:c05f7a1b4e47 44 AddChar(r, comm.getc());
quevedo 0:e58f27687450 45 t.start();
quevedo 0:e58f27687450 46 }
Wosser1sProductions 4:c05f7a1b4e47 47 } while(t.read_ms() < to);
Wosser1sProductions 4:c05f7a1b4e47 48
Wosser1sProductions 4:c05f7a1b4e47 49 AddChar(r, '\0');
Wosser1sProductions 4:c05f7a1b4e47 50 return r[0] != '\0';
quevedo 0:e58f27687450 51 }
quevedo 0:e58f27687450 52
quevedo 0:e58f27687450 53 // Gets the AP list. Parameter: the string to receive the list
Wosser1sProductions 4:c05f7a1b4e47 54 bool ESP8266::GetList(char *l) {
Wosser1sProductions 4:c05f7a1b4e47 55 SendCMD("AT+CWLAP");
Wosser1sProductions 4:c05f7a1b4e47 56 return RcvReply(l, 5000); // Needs big timeout because it takes long to start replying
quevedo 0:e58f27687450 57 }
quevedo 0:e58f27687450 58
quevedo 0:e58f27687450 59 // Joins a Wifi AP. Parameters: SSID and Password (strings)
Wosser1sProductions 4:c05f7a1b4e47 60 void ESP8266::Join(char *id, char *pwd) {
quevedo 0:e58f27687450 61 char cmd[255];
Wosser1sProductions 4:c05f7a1b4e47 62 sprintf(cmd, "AT+CWJAP=\"%s\",\"%s\"", id, pwd);
quevedo 0:e58f27687450 63 SendCMD(cmd);
quevedo 0:e58f27687450 64 }
quevedo 0:e58f27687450 65
quevedo 0:e58f27687450 66 // Gets ESP IP. Parameter: string to contain IP
Wosser1sProductions 4:c05f7a1b4e47 67 bool ESP8266::GetIP(char *ip) {
Wosser1sProductions 4:c05f7a1b4e47 68 SendCMD("AT+CIFSR");
Wosser1sProductions 4:c05f7a1b4e47 69 return RcvReply(ip, 2000);
quevedo 1:399414d48048 70 }
quevedo 1:399414d48048 71
quevedo 1:399414d48048 72 //Defines wifi mode; Parameter: mode; 1= STA, 2= AP, 3=both
Wosser1sProductions 4:c05f7a1b4e47 73 void ESP8266::SetMode(WiFiMode mode) {
quevedo 1:399414d48048 74 char cmd[15];
quevedo 1:399414d48048 75 strcpy(cmd, "AT+CWMODE=");
Wosser1sProductions 4:c05f7a1b4e47 76 AddChar(cmd, mode + '0'); // Completes command string
quevedo 1:399414d48048 77 SendCMD(cmd);
quevedo 1:399414d48048 78 }
quevedo 1:399414d48048 79
quevedo 1:399414d48048 80 // Quits the AP
quevedo 1:399414d48048 81 void ESP8266::Quit(void) {
Wosser1sProductions 4:c05f7a1b4e47 82 SendCMD("AT+CWQAP");
quevedo 1:399414d48048 83 }
quevedo 1:399414d48048 84
quevedo 1:399414d48048 85 // Sets single connection
quevedo 1:399414d48048 86 void ESP8266::SetSingle(void) {
Wosser1sProductions 4:c05f7a1b4e47 87 SendCMD("AT+CIPMUX=0");
quevedo 1:399414d48048 88 }
quevedo 1:399414d48048 89
quevedo 1:399414d48048 90 // Sets multiple connection
quevedo 1:399414d48048 91 void ESP8266::SetMultiple(void) {
Wosser1sProductions 4:c05f7a1b4e47 92 SendCMD("AT+CIPMUX=1");
quevedo 2:77388e8f0697 93 }
quevedo 2:77388e8f0697 94
quevedo 2:77388e8f0697 95 // Gets connection status. Parameter: string to contain status
Wosser1sProductions 4:c05f7a1b4e47 96 bool ESP8266::GetConnStatus(char * st) {
Wosser1sProductions 4:c05f7a1b4e47 97 SendCMD("AT+CIPSTATUS");
Wosser1sProductions 4:c05f7a1b4e47 98 return RcvReply(st, 2000);
quevedo 2:77388e8f0697 99 }
quevedo 2:77388e8f0697 100
quevedo 2:77388e8f0697 101 // Starts server mode. Parameter: port to be used
quevedo 2:77388e8f0697 102 void ESP8266::StartServerMode(int port) {
quevedo 2:77388e8f0697 103 char rs[25];
Wosser1sProductions 4:c05f7a1b4e47 104 sprintf(rs, "AT+CIPSERVER=1,%d", port);
quevedo 2:77388e8f0697 105 SendCMD(rs);
quevedo 2:77388e8f0697 106 }
quevedo 2:77388e8f0697 107
quevedo 2:77388e8f0697 108 // Close server mode.
quevedo 2:77388e8f0697 109 void ESP8266::CloseServerMode(void) {
Wosser1sProductions 4:c05f7a1b4e47 110 SendCMD("AT+CIPSERVER=0");
janhavi 3:4f24e7e803a1 111 }
janhavi 3:4f24e7e803a1 112
janhavi 3:4f24e7e803a1 113 void ESP8266::setTransparent(void){
Wosser1sProductions 4:c05f7a1b4e47 114 SendCMD("AT+CIPMODE=0");
janhavi 3:4f24e7e803a1 115 }
janhavi 3:4f24e7e803a1 116
janhavi 3:4f24e7e803a1 117 void ESP8266::startTCPConn(char *IP, int port){
janhavi 3:4f24e7e803a1 118 char rs[100];
Wosser1sProductions 4:c05f7a1b4e47 119 sprintf(rs, "AT+CIPSTART=0,\"TCP\",\"%s\",%d", IP, port);
janhavi 3:4f24e7e803a1 120 SendCMD(rs);
janhavi 3:4f24e7e803a1 121 }
janhavi 3:4f24e7e803a1 122
Wosser1sProductions 4:c05f7a1b4e47 123 void ESP8266::sendURL(char *URL, char* IP, char *command){
Wosser1sProductions 4:c05f7a1b4e47 124 char snd[20], http_cmd[300];
Wosser1sProductions 4:c05f7a1b4e47 125
Wosser1sProductions 4:c05f7a1b4e47 126 sprintf(http_cmd, "GET %s HTTP/1.1%sHost: %s%sConnection: close%s%s", URL, CMD_END, IP, CMD_END, CMD_END, CMD_END);
Wosser1sProductions 4:c05f7a1b4e47 127 sprintf(snd,"AT+CIPSEND=0,%d",strlen(http_cmd));
Wosser1sProductions 4:c05f7a1b4e47 128 strcpy(command, http_cmd);
janhavi 3:4f24e7e803a1 129
janhavi 3:4f24e7e803a1 130 SendCMD(snd);
Wosser1sProductions 4:c05f7a1b4e47 131 wait(1);
Wosser1sProductions 4:c05f7a1b4e47 132 SendCMD(http_cmd);
janhavi 3:4f24e7e803a1 133 }
janhavi 3:4f24e7e803a1 134
janhavi 3:4f24e7e803a1 135