Zoltan Hudak / Mbed 2 deprecated WebSwitch_WIZ550io

HTTP Server serving a simple webpage which enables to remotely turn LED1 on/off. Compile, download, run and type 'IP_address/secret/' (don't forget the last '/') into your web browser and hit ENTER.

Dependencies:   W5500Interface mbed

Turn LED1, or other digital output, on/off using a web browser.

In this example we create a HTTP server that will serve a simple Web page to remotely turn LED1, or other digital output on the mbed board, on/off by using a web browser. A WIZ550io module or W5500 Network-Shielld is used to assure connection between the mbed module and the Ethernet network (Internet).

Needed parts:

  • mbed board
  • WIZ550io module or W5500 Network-Shield
  • Wires
  • Web browser (Internet Explorer, Safari, Firefox, Chrome ...) running on Windows, Mac, Linux, iPhone or Android device.
/media/uploads/hudakz/webswitch_wiz.jpg/media/uploads/hudakz/webswitch_mobile01.jpg

The project was inspired by the Tuxgraphics Web Switch. Thank you Guido!

NOTE:

main.cpp@4:31010e482971, 2016-02-06 (annotated)

Committer:
hudakz
Date:
Sat Feb 06 10:34:47 2016 +0000
Revision:
4:31010e482971
Parent:
3:d0e3d1bd73e6
Child:
5:458d9d7b5c1b
Fixed bug + added support for W5500 without built-in MAC + added support for mbed boards equipped with Arduino header

Who changed what in which revision?

UserRevisionLine numberNew contents of line
hudakz 2:3803ea61daa1 1 /*
hudakz 3:d0e3d1bd73e6 2 * In this example LED1 on the mbed board is turned on/off using a web browser.
hudakz 1:343d3c7e13b8 3 * However, you can easily modify the project to remotely switch on/off any external device.
hudakz 0:5c8e08cf3b33 4 * The HTTP server is built from an mbed board and a WIZ550io board.
hudakz 0:5c8e08cf3b33 5 * The example is based on the Tuxgraphics Web Switch <http://www.tuxgraphics.org/>.
hudakz 4:31010e482971 6 * Thanks to Jozsef Voros it works now also with the W5500 modules without a built-in MAC
hudakz 3:d0e3d1bd73e6 7 * See below how to enable that.
hudakz 0:5c8e08cf3b33 8 */
hudakz 0:5c8e08cf3b33 9 #include "mbed.h"
hudakz 0:5c8e08cf3b33 10 #include "EthernetInterface.h"
hudakz 0:5c8e08cf3b33 11 #include <string>
hudakz 0:5c8e08cf3b33 12
hudakz 0:5c8e08cf3b33 13 using namespace std;
hudakz 0:5c8e08cf3b33 14
hudakz 0:5c8e08cf3b33 15 Serial serial(USBTX, USBRX);
hudakz 0:5c8e08cf3b33 16
hudakz 0:5c8e08cf3b33 17 #if defined(TARGET_LPC1768)
hudakz 1:343d3c7e13b8 18 EthernetInterface eth(p11, p12, p13, p8, p14); // MOSI, MISO, SCK, CS, RESET
hudakz 0:5c8e08cf3b33 19 #elif defined(TARGET_LPC11U24)
hudakz 1:343d3c7e13b8 20 EthernetInterface eth(P16, P15, P13, P17, P18); // MOSI, MISO, SCK, CS, RESET
hudakz 3:d0e3d1bd73e6 21 #elif defined(TARGET_NUCLEO_F103RB) || defined(TARGET_NUCLEO_L152RE) || defined(TARGET_NUCLEO_F030R8) \
hudakz 3:d0e3d1bd73e6 22 || defined(TARGET_NUCLEO_F401RE) || defined(TARGET_NUCLEO_F302R8) || defined(TARGET_NUCLEO_L053R8) \
hudakz 3:d0e3d1bd73e6 23 || defined(TARGET_NUCLEO_F411RE) || defined(TARGET_NUCLEO_F334R8) || defined(TARGET_NUCLEO_F072RB) \
hudakz 3:d0e3d1bd73e6 24 || defined(TARGET_NUCLEO_F091RC) || defined(TARGET_NUCLEO_F303RE) || defined(TARGET_NUCLEO_F070RB) \
hudakz 3:d0e3d1bd73e6 25 || defined(TARGET_KL25Z ) || defined(TARGET_KL46Z) || defined(TARGET_K64F) || defined(TARGET_KL05Z) \
hudakz 3:d0e3d1bd73e6 26 || defined(TARGET_K20D50M) || defined(TARGET_K22F) \
hudakz 3:d0e3d1bd73e6 27 || defined(TARGET_NRF51822) \
hudakz 3:d0e3d1bd73e6 28 || defined(TARGET_RZ_A1H)
hudakz 3:d0e3d1bd73e6 29 EthernetInterface eth(D4, D5, D3, D6, D7); // MOSI, MISO, SCK, CS, RESET
hudakz 0:5c8e08cf3b33 30
hudakz 0:5c8e08cf3b33 31 // If your board/plaform is not present yet then uncomment
hudakz 1:343d3c7e13b8 32 // the following two lines and replace modify as appropriate.
hudakz 0:5c8e08cf3b33 33
hudakz 0:5c8e08cf3b33 34 //#elif defined(TARGET_YOUR_BOARD)
hudakz 1:343d3c7e13b8 35 //EthernetInterface eth(SPI_MOSI, SPI_MISO, SPI_SCK, SPI_CS, RESET); // MOSI, MISO, SCK, CS, RESET
hudakz 0:5c8e08cf3b33 36 #endif
hudakz 0:5c8e08cf3b33 37
hudakz 0:5c8e08cf3b33 38 // Note:
hudakz 0:5c8e08cf3b33 39 // If it happends that any of the SPI_MOSI, SPI_MISO, SPI_SCK, SPI_CS or RESET pins collide with LED1 pin
hudakz 0:5c8e08cf3b33 40 // then either use different SPI port (if available on the board) and change the pin names
hudakz 0:5c8e08cf3b33 41 // in the constructor spi(...) accordingly or instead of using LED1 pin, select
hudakz 0:5c8e08cf3b33 42 // a free pin (not used by SPI port) and connect to it an external LED which is connected
hudakz 0:5c8e08cf3b33 43 // to a 220 Ohm resitor that is connected to the groud.
hudakz 0:5c8e08cf3b33 44 // In the second case remember to replace LED1 in sw(LED1) constructor (see below).
hudakz 0:5c8e08cf3b33 45 // IP address must be also unique and compatible with your network. Change as appropriate.
hudakz 3:d0e3d1bd73e6 46
hudakz 4:31010e482971 47 // If intead of WIZ550io you'd like to use a W5500 module without a built-in MAC please uncommend the following line
hudakz 4:31010e482971 48 #define W5500 1
hudakz 3:d0e3d1bd73e6 49
hudakz 4:31010e482971 50 #if defined(W5500)
hudakz 3:d0e3d1bd73e6 51 // The MAC number must be unique within the connected network. Modify as appropriate.
hudakz 3:d0e3d1bd73e6 52 uint8_t MY_MAC[6] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05 };
hudakz 3:d0e3d1bd73e6 53 #endif
hudakz 3:d0e3d1bd73e6 54
hudakz 0:5c8e08cf3b33 55 const char MY_IP[] = "192.168.1.181";
hudakz 0:5c8e08cf3b33 56 const char MY_NETMASK[] = "255.255.255.0";
hudakz 0:5c8e08cf3b33 57 const char MY_GATEWAY[] = "192.168.1.1";
hudakz 0:5c8e08cf3b33 58 int MY_PORT = 80;
hudakz 0:5c8e08cf3b33 59
hudakz 0:5c8e08cf3b33 60 TCPSocketServer server;
hudakz 0:5c8e08cf3b33 61 TCPSocketConnection client;
hudakz 0:5c8e08cf3b33 62 bool serverIsListening = false;
hudakz 0:5c8e08cf3b33 63
hudakz 0:5c8e08cf3b33 64 DigitalOut sw(LED1); // Change LED1 to a pin of your choice.
hudakz 0:5c8e08cf3b33 65 // However, make sure that it does not collide with any of the SPI pins
hudakz 0:5c8e08cf3b33 66
hudakz 0:5c8e08cf3b33 67 const string PASSWORD = "secret"; // change as you like
hudakz 0:5c8e08cf3b33 68 const string HTTP_OK = "HTTP/1.0 200 OK";
hudakz 4:31010e482971 69 const string permanentlyMoved = "HTTP/1.0 301 Moved Permanently\r\nLocation: ";
hudakz 0:5c8e08cf3b33 70 const string UNAUTHORIZED = "HTTP/1.0 401 Unauthorized";
hudakz 0:5c8e08cf3b33 71
hudakz 0:5c8e08cf3b33 72 string httpHeader; // HTTP header
hudakz 0:5c8e08cf3b33 73 string httpContent; // HTTP content
hudakz 0:5c8e08cf3b33 74
hudakz 0:5c8e08cf3b33 75 // analyse the url given
hudakz 0:5c8e08cf3b33 76 // return values: -1 invalid password
hudakz 0:5c8e08cf3b33 77 // -2 no command given but password valid
hudakz 0:5c8e08cf3b33 78 // -3 just refresh page
hudakz 0:5c8e08cf3b33 79 // 0 switch off
hudakz 0:5c8e08cf3b33 80 // 1 switch on
hudakz 0:5c8e08cf3b33 81 //
hudakz 0:5c8e08cf3b33 82 // The string passed to this function will look like this:
hudakz 0:5c8e08cf3b33 83 // GET /password HTTP/1.....
hudakz 0:5c8e08cf3b33 84 // GET /password/ HTTP/1.....
hudakz 0:5c8e08cf3b33 85 // GET /password/?sw=1 HTTP/1.....
hudakz 0:5c8e08cf3b33 86
hudakz 0:5c8e08cf3b33 87 // GET /password/?sw=0 HTTP/1.....
hudakz 4:31010e482971 88 int8_t analyseGetURL(string& str) {
hudakz 0:5c8e08cf3b33 89 if(str.substr(5, PASSWORD.size()) != PASSWORD)
hudakz 0:5c8e08cf3b33 90 return(-1);
hudakz 0:5c8e08cf3b33 91
hudakz 0:5c8e08cf3b33 92 uint8_t pos = 5 + PASSWORD.size();
hudakz 0:5c8e08cf3b33 93
hudakz 0:5c8e08cf3b33 94 if(str.substr(pos, 1) == " ")
hudakz 0:5c8e08cf3b33 95 return(-2);
hudakz 0:5c8e08cf3b33 96
hudakz 0:5c8e08cf3b33 97 if(str.substr(pos, 1) != "/")
hudakz 0:5c8e08cf3b33 98 return(-1);
hudakz 0:5c8e08cf3b33 99
hudakz 0:5c8e08cf3b33 100 pos++;
hudakz 0:5c8e08cf3b33 101
hudakz 0:5c8e08cf3b33 102 string cmd(str.substr(pos, 5));
hudakz 0:5c8e08cf3b33 103
hudakz 0:5c8e08cf3b33 104 if(cmd == "?sw=0")
hudakz 0:5c8e08cf3b33 105 return(0);
hudakz 0:5c8e08cf3b33 106
hudakz 0:5c8e08cf3b33 107 if(cmd == "?sw=1")
hudakz 0:5c8e08cf3b33 108 return(1);
hudakz 0:5c8e08cf3b33 109
hudakz 0:5c8e08cf3b33 110 return(-3);
hudakz 0:5c8e08cf3b33 111 }
hudakz 0:5c8e08cf3b33 112
hudakz 0:5c8e08cf3b33 113 /**
hudakz 0:5c8e08cf3b33 114 * @brief
hudakz 0:5c8e08cf3b33 115 * @note
hudakz 0:5c8e08cf3b33 116 * @param
hudakz 0:5c8e08cf3b33 117 * @retval
hudakz 0:5c8e08cf3b33 118 */
hudakz 4:31010e482971 119 string& movedPermanently(uint8_t flag) {
hudakz 0:5c8e08cf3b33 120 if(flag == 1)
hudakz 0:5c8e08cf3b33 121 httpContent = "/" + PASSWORD + "/";
hudakz 0:5c8e08cf3b33 122 else
hudakz 0:5c8e08cf3b33 123 httpContent = "";
hudakz 0:5c8e08cf3b33 124
hudakz 0:5c8e08cf3b33 125 httpContent += "<h1>301 Moved Permanently</h1>\r\n";
hudakz 0:5c8e08cf3b33 126
hudakz 0:5c8e08cf3b33 127 return(httpContent);
hudakz 0:5c8e08cf3b33 128 }
hudakz 0:5c8e08cf3b33 129
hudakz 0:5c8e08cf3b33 130 /**
hudakz 0:5c8e08cf3b33 131 * @brief
hudakz 0:5c8e08cf3b33 132 * @note
hudakz 0:5c8e08cf3b33 133 * @param
hudakz 0:5c8e08cf3b33 134 * @retval
hudakz 0:5c8e08cf3b33 135 */
hudakz 0:5c8e08cf3b33 136 string& view(uint8_t status) {
hudakz 0:5c8e08cf3b33 137 httpContent = "<h2>Web Switch</h2>\r\n";
hudakz 0:5c8e08cf3b33 138
hudakz 0:5c8e08cf3b33 139 if(status == 1) {
hudakz 0:5c8e08cf3b33 140 httpContent += "<pre>\r\n <font color=#FF0000>ON</font>";
hudakz 0:5c8e08cf3b33 141 httpContent += " <a href=\"./?sw=0\">[switch off]</a>\r\n";
hudakz 0:5c8e08cf3b33 142 }
hudakz 0:5c8e08cf3b33 143 else {
hudakz 0:5c8e08cf3b33 144 httpContent += "<pre>\r\n <font color=#00FF00>OFF</font>";
hudakz 0:5c8e08cf3b33 145 httpContent += " <a href=\"./?sw=1\">[switch on]</a>\r\n";
hudakz 0:5c8e08cf3b33 146 }
hudakz 0:5c8e08cf3b33 147
hudakz 0:5c8e08cf3b33 148 httpContent += " <a href=\".\">[refresh status]</a>\r\n";
hudakz 0:5c8e08cf3b33 149 httpContent += "</pre>\r\n";
hudakz 0:5c8e08cf3b33 150 httpContent += "<hr>\r\n";
hudakz 0:5c8e08cf3b33 151 return httpContent;
hudakz 0:5c8e08cf3b33 152 }
hudakz 0:5c8e08cf3b33 153
hudakz 0:5c8e08cf3b33 154 /**
hudakz 0:5c8e08cf3b33 155 * @brief
hudakz 0:5c8e08cf3b33 156 * @note
hudakz 0:5c8e08cf3b33 157 * @param
hudakz 0:5c8e08cf3b33 158 * @retval
hudakz 0:5c8e08cf3b33 159 */
hudakz 4:31010e482971 160 void sendHTTP(TCPSocketConnection& client, string& header, string& content) {
hudakz 4:31010e482971 161 char contentLeght[5] = { };
hudakz 0:5c8e08cf3b33 162
hudakz 0:5c8e08cf3b33 163 header += "\r\nContent-Type: text/html\r\n";
hudakz 0:5c8e08cf3b33 164 header += "Content-Length: ";
hudakz 4:31010e482971 165 sprintf(contentLeght, "%d", content.length());
hudakz 4:31010e482971 166 header += string(contentLeght) + "\r\n";
hudakz 0:5c8e08cf3b33 167 header += "Pragma: no-cache\r\n";
hudakz 0:5c8e08cf3b33 168 header += "Connection: About to close\r\n";
hudakz 0:5c8e08cf3b33 169 header += "\r\n";
hudakz 0:5c8e08cf3b33 170
hudakz 0:5c8e08cf3b33 171 string webpage = header + content;
hudakz 0:5c8e08cf3b33 172 client.send (const_cast<char*>(webpage.c_str ()), webpage.length ());
hudakz 0:5c8e08cf3b33 173 }
hudakz 0:5c8e08cf3b33 174
hudakz 0:5c8e08cf3b33 175 /**
hudakz 0:5c8e08cf3b33 176 * @brief
hudakz 0:5c8e08cf3b33 177 * @note
hudakz 0:5c8e08cf3b33 178 * @param
hudakz 0:5c8e08cf3b33 179 * @retval
hudakz 0:5c8e08cf3b33 180 */
hudakz 4:31010e482971 181 void closeClient(void) {
hudakz 4:31010e482971 182 client.close();
hudakz 4:31010e482971 183 serial.printf("Connection closed.\n\rTCP server is listening...\n\r");
hudakz 4:31010e482971 184 }
hudakz 4:31010e482971 185
hudakz 4:31010e482971 186 /**
hudakz 4:31010e482971 187 * @brief
hudakz 4:31010e482971 188 * @note
hudakz 4:31010e482971 189 * @param
hudakz 4:31010e482971 190 * @retval
hudakz 4:31010e482971 191 */
hudakz 0:5c8e08cf3b33 192 int main(void) {
hudakz 4:31010e482971 193 #if defined(W5500)
hudakz 3:d0e3d1bd73e6 194 int ret = eth.init(MY_MAC, MY_IP, MY_NETMASK, MY_GATEWAY);
hudakz 3:d0e3d1bd73e6 195 #else
hudakz 0:5c8e08cf3b33 196 int ret = eth.init(MY_IP, MY_NETMASK, MY_GATEWAY);
hudakz 3:d0e3d1bd73e6 197 #endif
hudakz 0:5c8e08cf3b33 198 if(!ret) {
hudakz 0:5c8e08cf3b33 199 serial.printf("Initialized, MY_MAC: %s\n", eth.getMACAddress());
hudakz 0:5c8e08cf3b33 200 serial.printf
hudakz 0:5c8e08cf3b33 201 (
hudakz 0:5c8e08cf3b33 202 "Connected, MY_IP: %s, MY_NETMASK: %s, MY_GATEWAY: %s\n",
hudakz 0:5c8e08cf3b33 203 eth.getIPAddress(),
hudakz 0:5c8e08cf3b33 204 eth.getNetworkMask(),
hudakz 0:5c8e08cf3b33 205 eth.getGateway()
hudakz 0:5c8e08cf3b33 206 );
hudakz 0:5c8e08cf3b33 207 }
hudakz 0:5c8e08cf3b33 208 else {
hudakz 0:5c8e08cf3b33 209 serial.printf("Error eth.init() - ret = %d\n", ret);
hudakz 0:5c8e08cf3b33 210 return -1;
hudakz 0:5c8e08cf3b33 211 }
hudakz 0:5c8e08cf3b33 212
hudakz 0:5c8e08cf3b33 213 //setup tcp socket
hudakz 0:5c8e08cf3b33 214 if(server.bind(MY_PORT) < 0) {
hudakz 0:5c8e08cf3b33 215 serial.printf("TCP server bind failed.\n\r");
hudakz 0:5c8e08cf3b33 216 return -1;
hudakz 0:5c8e08cf3b33 217 }
hudakz 0:5c8e08cf3b33 218 else {
hudakz 0:5c8e08cf3b33 219 serial.printf("TCP server bind succeeded.\n\r");
hudakz 0:5c8e08cf3b33 220 serverIsListening = true;
hudakz 0:5c8e08cf3b33 221 }
hudakz 0:5c8e08cf3b33 222
hudakz 0:5c8e08cf3b33 223 if(server.listen(1) < 0) {
hudakz 0:5c8e08cf3b33 224 serial.printf("TCP server listen failed.\n\r");
hudakz 0:5c8e08cf3b33 225 return -1;
hudakz 0:5c8e08cf3b33 226 }
hudakz 0:5c8e08cf3b33 227 else {
hudakz 0:5c8e08cf3b33 228 serial.printf("TCP server is listening...\n\r");
hudakz 0:5c8e08cf3b33 229 }
hudakz 0:5c8e08cf3b33 230
hudakz 0:5c8e08cf3b33 231 while(serverIsListening) {
hudakz 0:5c8e08cf3b33 232 if(server.accept(client) >= 0) {
hudakz 0:5c8e08cf3b33 233 char buf[1024] = { };
hudakz 0:5c8e08cf3b33 234 size_t size = 0;
hudakz 0:5c8e08cf3b33 235
hudakz 0:5c8e08cf3b33 236 serial.printf("Client connected!\n\rIP: %s\n\r", client.get_address());
hudakz 0:5c8e08cf3b33 237
hudakz 0:5c8e08cf3b33 238 switch(client.receive(buf, 1023)) {
hudakz 0:5c8e08cf3b33 239 case 0:
hudakz 0:5c8e08cf3b33 240 serial.printf("Recieved buffer is empty.\n\r");
hudakz 0:5c8e08cf3b33 241 break;
hudakz 0:5c8e08cf3b33 242
hudakz 0:5c8e08cf3b33 243 case -1:
hudakz 0:5c8e08cf3b33 244 serial.printf("Failed to read data from client.\n\r");
hudakz 0:5c8e08cf3b33 245 break;
hudakz 0:5c8e08cf3b33 246
hudakz 0:5c8e08cf3b33 247 default:
hudakz 0:5c8e08cf3b33 248 size = strlen(buf);
hudakz 0:5c8e08cf3b33 249
hudakz 0:5c8e08cf3b33 250 string received((char*)buf);
hudakz 0:5c8e08cf3b33 251
hudakz 0:5c8e08cf3b33 252 if(received.substr(0, 3) != "GET") {
hudakz 0:5c8e08cf3b33 253 httpHeader = HTTP_OK;
hudakz 0:5c8e08cf3b33 254 httpContent = "<h1>200 OK</h1>";
hudakz 4:31010e482971 255 sendHTTP(client, httpHeader, httpContent);
hudakz 4:31010e482971 256 closeClient();
hudakz 0:5c8e08cf3b33 257 continue;
hudakz 0:5c8e08cf3b33 258 }
hudakz 0:5c8e08cf3b33 259
hudakz 0:5c8e08cf3b33 260 if(received.substr(0, 6) == "GET / ") {
hudakz 0:5c8e08cf3b33 261 httpHeader = HTTP_OK;
hudakz 0:5c8e08cf3b33 262 httpContent = "<p>Usage: http://host_or_ip/password</p>\r\n";
hudakz 4:31010e482971 263 sendHTTP(client, httpHeader, httpContent);
hudakz 4:31010e482971 264 closeClient();
hudakz 0:5c8e08cf3b33 265 continue;
hudakz 0:5c8e08cf3b33 266 }
hudakz 0:5c8e08cf3b33 267
hudakz 4:31010e482971 268 int cmd = analyseGetURL(received);
hudakz 0:5c8e08cf3b33 269
hudakz 0:5c8e08cf3b33 270 if(cmd == -2) {
hudakz 0:5c8e08cf3b33 271
hudakz 0:5c8e08cf3b33 272 // redirect to the right base url
hudakz 4:31010e482971 273 httpHeader = permanentlyMoved;
hudakz 4:31010e482971 274 sendHTTP(client, httpHeader, movedPermanently(1));
hudakz 4:31010e482971 275 closeClient();
hudakz 0:5c8e08cf3b33 276 continue;
hudakz 0:5c8e08cf3b33 277 }
hudakz 0:5c8e08cf3b33 278
hudakz 0:5c8e08cf3b33 279 if(cmd == -1) {
hudakz 0:5c8e08cf3b33 280 httpHeader = UNAUTHORIZED;
hudakz 0:5c8e08cf3b33 281 httpContent = "<h1>401 Unauthorized</h1>";
hudakz 4:31010e482971 282 sendHTTP(client, httpHeader, httpContent);
hudakz 4:31010e482971 283 closeClient();
hudakz 0:5c8e08cf3b33 284 continue;
hudakz 0:5c8e08cf3b33 285 }
hudakz 0:5c8e08cf3b33 286
hudakz 0:5c8e08cf3b33 287 if(cmd == 1) {
hudakz 0:5c8e08cf3b33 288 sw = 1; // switch on
hudakz 0:5c8e08cf3b33 289 }
hudakz 0:5c8e08cf3b33 290
hudakz 0:5c8e08cf3b33 291 if(cmd == 0) {
hudakz 0:5c8e08cf3b33 292 sw = 0; // switch off
hudakz 0:5c8e08cf3b33 293 }
hudakz 0:5c8e08cf3b33 294
hudakz 0:5c8e08cf3b33 295 httpHeader = HTTP_OK;
hudakz 4:31010e482971 296 sendHTTP(client, httpHeader, view(sw));
hudakz 0:5c8e08cf3b33 297 }
hudakz 4:31010e482971 298 closeClient();
hudakz 0:5c8e08cf3b33 299 }
hudakz 0:5c8e08cf3b33 300 }
hudakz 0:5c8e08cf3b33 301 }