Ferdinand Stueckler
WEB server handles an ESP8266 module to control a LED
Fork of
WebSwitch_ENC28J60
by 
Zoltan Hudak
Diff: main.cpp
- Revision:
- 5:9b4fd5f07e10
- Parent:
- 4:d34811deedab
--- a/main.cpp Wed Feb 04 19:27:26 2015 +0000
+++ b/main.cpp Wed Jan 06 14:47:02 2016 +0000
@@ -1,207 +1,349 @@
-/* In this example LED1 is switched on/off using a web browser connected to this HTTP server.
- * The example is based on the Tuxgraphics Web Switch <http://www.tuxgraphics.org/>.
- * This HTTP server is built around the the ENC28J60 chip
- * driven by the UIPEthernet library <https://github.com/ntruchsess/arduino_uip>
- * ported to mbed.
- */
+#include <mbed.h>
-#include <mbed.h>
-#include <UIPEthernet.h>
-#include <UIPServer.h>
-#include <UIPClient.h>
-#include <string>
-
-using namespace std;
+// WEB Server to control one LED
+// -----------------------------
-// UIPEthernet is the name of a global instance of UIPEthernetClass.
-// Do not change the name! It is used within the UIPEthernet library.
-#if defined(TARGET_LPC1768)
-UIPEthernetClass UIPEthernet(p11, p12, p13, p8); // mosi, miso, sck, cs
-#elif defined(TARGET_LPC1114)
-UIPEthernetClass UIPEthernet(dp2, dp1, dp6, dp25); // mosi, miso, sck, cs
-#elif defined(TARGET_LPC11U68)
-UIPEthernetClass UIPEthernet(P0_9, P0_8, P1_29, P0_2); // mosi, miso, sck, cs
-#elif defined (TARGET_NUCLEO_F103RB)
-UIPEthernetClass UIPEthernet(PB_5, PB_4, PB_3, PB_6); // mosi, miso, sck, cs
-#elif defined (TARGET_NUCLEO_F401RE)
-UIPEthernetClass UIPEthernet(PB_5, PB_4, PB_3, PB_6); // mosi, miso, sck, cs
-#elif defined (TARGET_NUCLEO_F411RE)
-UIPEthernetClass UIPEthernet(PB_5, PB_4, PB_3, PB_6); // mosi, miso, sck, cs
+Serial pc(USBTX, USBRX);
+Serial esp(PA_9, PA_10); // tx, rx
+DigitalOut sw(PA_5); // Change LED to a pin of your choice. However, make sure that it does not collide with any serial pins already used
+
+Timer t;
-// If your board/plaform is not present yet then uncomment the following two lines and replace TARGET_YOUR_BOARD as appropriate.
-
-//#elif defined (TARGET_YOUR_BOARD)
-//UIPEthernetClass UIPEthernet(SPI_MOSI, SPI_MISO, SPI_SCK, SPI_CS); // mosi, miso, sck, cs
-
-#endif
-
-// Note:
-// If it happends that any of the SPI_MOSI, SPI_MISO, SPI_SCK, SPI_CS pins collide with LED1 pin
-// then either use different SPI port (if available on the board) and change the pin names in the constructor UIPEthernet(...) accordingly
-// or instead of using LED1 pin, select a free pin (not used by SPI port) and connect to it an external LED which is connected to a resitor that is connected to the groud.
-// In the second case remember to replace LED1 in sw(LED1) constructor (see below).
-
+int count,ended,timeout;
+char buf[1024];
+char snd[255];
-// MAC number must be unique within the connected network. Modify as appropriate.
-const uint8_t MY_MAC[6] = {0x00,0x01,0x02,0x03,0x04,0x06};
-// IP address must be also unique and compatible with your network. Change as appropriate.
-const IPAddress MY_IP(192,168,1,181);
-const uint16_t MY_PORT = 80; // for HTTP connection
-EthernetServer myServer = EthernetServer(MY_PORT);
-// In this example we are turning on/off LED1.
-DigitalOut sw(LED1); // Change LED1 to a pin of your choice. However, make sure that it does not collide with any of the SPI pins already used in the UIPEthernet(...) constructor above!
+const char* PASSWORD = "secret"; // change as you like
+const char ssid[32] = "ESP8266"; // enter router ssid inside the quotes
+const char pwd [32] = "ok"; // enter router password inside the quotes
+char http[1024]; // HTTP content
+uint8_t port = 80;
+int id = 1;
-const string PASSWORD = "secret"; // change as you like
-const string HTTP_OK = "HTTP/1.0 200 OK";
-const string MOVED_PERM = "HTTP/1.0 301 Moved Permanently\r\nLocation: ";
-const string UNAUTHORIZED = "HTTP/1.0 401 Unauthorized";
-string httpHeader; // HTTP header
-string httpContent; // HTTP content
+void SendCMD(char*),SendData(char*),GetReplyLine(int,char*,int),GetReply(int,char*,int),ESPconfig_Server(),ESPconfig_Client(),ESPsetbaudrate(),page(int);
+int checksw(char*);
-// analyse the url given
-// return values: -1 invalid password
-// -2 no command given but password valid
-// -3 just refresh page
-// 0 switch off
-// 1 switch on
-//
-// The string passed to this function will look like this:
-// GET /password HTTP/1.....
-// GET /password/ HTTP/1.....
-// GET /password/?sw=1 HTTP/1.....
-// GET /password/?sw=0 HTTP/1.....
-
-int8_t analyse_get_url(string& str)
-{
- if(str.substr(5, PASSWORD.size()) != PASSWORD)
- return(-1);
-
- uint8_t pos = 5 + PASSWORD.size();
-
- if(str.substr(pos, 1) == " ")
- return(-2);
-
- if(str.substr(pos, 1) != "/")
- return(-1);
-
- pos++;
-
- string cmd(str.substr(pos, 5));
-
- if(cmd == "?sw=0")
- return(0);
-
- if(cmd == "?sw=1")
- return(1);
-
- return(-3);
-}
+// USAGE:
+// IP/password
+// IP/password/?sw=1
+// IP/password/?sw=0
-string& moved_perm(uint8_t flag)
-{
- if(flag == 1)
- httpContent = "/" + PASSWORD + "/";
- else
- httpContent = "";
-
- httpContent += "<h1>301 Moved Permanently</h1>\r\n";
-
- return (httpContent);
-}
-
-string& page(uint8_t status)
-{
- httpContent = "<h2>Web Switch</h2>\r\n";
-
- if(status == 1) {
- httpContent += "<pre>\r\n <font color=#FF0000>ON</font>";
- httpContent += " <a href=\"./?sw=0\">[switch off]</a>\r\n";
- } else {
- httpContent += "<pre>\r\n <font color=#00FF00>OFF</font>";
- httpContent += " <a href=\"./?sw=1\">[switch on]</a>\r\n";
- }
-
- httpContent += " <a href=\".\">[refresh status]</a>\r\n";
- httpContent += "</pre>\r\n";
- httpContent += "<hr>\r\n";
- return httpContent;
-}
-
-void http_send(EthernetClient& client, string& header, string& content)
-{
- char content_length[5] = {};
-
- header += "\r\nContent-Type: text/html\r\n";
- header += "Content-Length: ";
- sprintf(content_length, "%d", content.length());
- header += string(content_length) + "\r\n";
- header += "Pragma: no-cache\r\n";
- header += "Connection: About to close\r\n";
- header += "\r\n";
- string webpage = header + content;
- client.write((uint8_t*)webpage.c_str(),webpage.length());
-}
int main()
{
- UIPEthernet.begin(MY_MAC,MY_IP);
- myServer.begin();
+
+ // Setup
+ esp.baud(115200); // esp speed
+ pc.baud(9600); // change this to the new ESP8266 baudrate if it is changed at any time.
+
+
+ //ESPconfig_Client();
+ ESPconfig_Server();
+
+ for (int i=0; i<8; i++)
+ {
+ sw=!sw;
+ wait(0.3);
+ }
+
+
+ // Loop
while(1) {
- EthernetClient client = myServer.available();
- if (client) {
- size_t size = client.available();
- if(size > 0) {
- uint8_t* buf = (uint8_t*)malloc(size);
- size = client.read(buf, size);
- string received((char*)buf);
- free(buf);
- if(received.substr(0, 3) != "GET") {
- // head, post or other method
- // for possible status codes see:
- // http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
- httpHeader = HTTP_OK;
- httpContent = "<h1>200 OK</h1>";
- http_send(client, httpHeader, httpContent);
- continue;
- }
-
- if(received.substr(0, 6) == "GET / ") {
- httpHeader = HTTP_OK;
- httpContent = "<p>Usage: http://host_or_ip/password</p>\r\n";
- http_send(client, httpHeader, httpContent);
- continue;
+ timeout=2;
+ if(esp.readable()){
+ GetReply(500,buf,sizeof(buf));
+ char* rqstPnt = strstr(buf, "+IPD");
+ if(rqstPnt != NULL)
+ {
+ sscanf(rqstPnt, "+IPD,%d", &id);
+
+ page(checksw(buf));
+
+ // Command TCP/IP Data Tx
+ sprintf(snd,"AT+CIPSEND=%d,%d\r\n", id, strlen(http));
+ SendCMD(snd);
+ GetReply(500,buf,sizeof(buf));
+
+ SendData(http);
+
+ bool weberror = true;
+ int cnt = 0;
+ while(weberror && cnt < 100){
+ GetReply(500,buf,sizeof(buf));
+ if(strstr(buf, "SEND OK") != NULL)
+ weberror = false;
+
+ cnt++;
}
-
- int cmd = analyse_get_url(received);
-
- if(cmd == -2) {
- // redirect to the right base url
- httpHeader = MOVED_PERM;
- http_send(client, httpHeader, moved_perm(1));
- continue;
+
+ if(weberror)
+ {
+ strcpy(snd,"AT+CIPMUX=1\r\n");
+ SendCMD(snd);
+ GetReply(500,buf,sizeof(buf));
+
+ sprintf(snd,"AT+CIPSERVER=1,%d\r\n", port);
+ SendCMD(snd);
+ GetReply(2000,buf,sizeof(buf));
}
-
- if(cmd == -1) {
- httpHeader = UNAUTHORIZED;
- httpContent = "<h1>401 Unauthorized</h1>";
- http_send(client, httpHeader, httpContent);
- continue;
+ else
+ {
+ sprintf(snd,"AT+CIPCLOSE=%d\r\n", id); // Notice id is an int formatted to string
+ SendCMD(snd);
+ GetReply(500,buf,sizeof(buf));
}
-
- if(cmd == 1) {
- sw = 1; // switch on
- }
-
- if(cmd == 0) {
- sw = 0; // switch off
- }
-
- httpHeader = HTTP_OK;
- http_send(client, httpHeader, page(sw));
}
}
}
}
+void page(int status)
+{
+ char content_length[5];
+ char info[255];
+
+ strcpy(info,"<h2>Web Switch</h2>\r\n");
+
+ if(status < 0)
+ {
+ strcat(info,"<p>Usage: http://host_or_ip/password</p>\r\n");
+ }
+ else if (status == 1)
+ {
+ strcat(info,"<pre>\r\n <font color=#FF0000>ON</font>");
+ strcat(info," <a href=\"./?sw=0\">[switch off]</a>\r\n");
+ }
+ else
+ {
+ strcat(info,"<pre>\r\n <font color=#00FF00>OFF</font>");
+ strcat(info," <a href=\"./?sw=1\">[switch on]</a>\r\n");
+ }
+
+ strcat(info," <a href=\".\">[refresh status]</a>\r\n");
+ strcat(info,"</pre>\r\n");
+ strcat(info,"<br>\r\n");
+
+ strcpy(http,"HTTP/1.0 200 OK");
+ strcat(http,"\r\nContent-Type: text/html\r\n");
+ strcat(http,"Content-Length: ");
+ sprintf(content_length, "%d", strlen(buf));
+ strcat(http,content_length);
+ strcat(http,"\r\nPragma: no-cache\r\n");
+ strcat(http,"Connection: About to close\r\n\r\n");
+ strcat(http,info);
+}
+
+
+int checksw(char *buf)
+{
+ int ret = 0;
+
+ if(strstr(buf,PASSWORD)== NULL)
+ return -1;
+
+ char* rqstPnt = strstr(buf, "?sw=");
+ if(rqstPnt == NULL)
+ ret = 0;
+ else
+ sscanf(rqstPnt,"?sw=%d", &ret);
+
+ if(ret == 1)
+ sw = 1; // switch on
+ else
+ sw = 0; // switch off
+
+ return ret;
+}
+
+
+void ESPconfig_Server()
+{
+
+ pc.printf("------- Starting ESP Config -------\r\n\n");
+ pc.printf("------- Reset & get Firmware ------\r\n");
+ strcpy(snd,"AT+RST\r\n");
+ SendCMD(snd);
+ GetReply(6000,buf,sizeof(buf));
+
+
+ pc.printf("\n---------- Get Version ----------\r\n");
+ strcpy(snd,"AT+GMR\r\n");
+ SendCMD(snd);
+ GetReply(1000,buf,sizeof(buf));
+ pc.printf(buf);
+ GetReply(1000,buf,sizeof(buf));
+
+ // set CWMODE to 1=Station,2=AP,3=BOTH, default mode 1 (Station)
+ pc.printf("\n---------- Setting Mode ----------\r\n");
+ strcpy(snd, "AT+CWMODE=2\r\n");
+ SendCMD(snd);
+ GetReply(1000,buf,sizeof(buf));
+ pc.printf(buf);
+
+ // set CIPMUX to 0=Single,1=Multi
+ pc.printf("\n---- Setting Connection Mode -----\r\n");
+ strcpy(snd, "AT+CIPMUX=1\r\n");
+ SendCMD(snd);
+ GetReply(1000,buf,sizeof(buf));
+
+
+
+ pc.printf("\n------------ AP ------------\r\n");
+ pc.printf("ssid = %s pwd = %s\r\n",ssid,pwd);
+ strcpy(snd, "AT+CWSAP=\"");
+ strcat(snd, ssid);
+ strcat(snd, "\",\"");
+ strcat(snd, pwd);
+ strcat(snd, "\",4,0\r\n");
+ SendCMD(snd);
+ GetReply(8000,buf,sizeof(buf));
+ pc.printf(buf);
+
+ pc.printf("\n------- Set Server Port ------\r\n");
+ sprintf(snd, "AT+CIPSERVER=1,%d\r\n", port);
+ SendCMD(snd);
+ GetReply(1000,buf,sizeof(buf));
+
+
+ pc.printf("\n----- Set Server Timeout -----\r\n");
+ sprintf(snd,"AT+CIPSTO=%d\r\n", 5);
+ SendCMD(snd);
+ GetReply(1000,buf,sizeof(buf));
+
+
+ pc.printf("\n---------- Get IP's ----------\r\n");
+ strcpy(snd, "AT+CWSAP?\r\n");
+ SendCMD(snd);
+ GetReply(1000,buf,sizeof(buf));
+ pc.printf(buf);
+
+ strcpy(snd, "AT+CIFSR\r\n");
+ SendCMD(snd);
+ GetReply(2000,buf,sizeof(buf));
+ pc.printf(buf);
+ pc.printf("\n------- Connection Up --------\r\n");
+
+}
+
+void ESPconfig_Client()
+{
+
+ pc.printf("---------- Starting ESP Config -----------\r\n\n");
+ pc.printf("---------- Reset & get Firmware ----------\r\n");
+ strcpy(snd,"AT+RST\r\n");
+ SendCMD(snd);
+ GetReply(6000,buf,sizeof(buf));
+
+
+ pc.printf("\n---------- Get Version ----------\r\n");
+ strcpy(snd,"AT+GMR\r\n");
+ SendCMD(snd);
+ GetReply(3000,buf,sizeof(buf));
+ pc.printf(buf);
+
+ // set CWMODE to 1=Station,2=AP,3=BOTH, default mode 1 (Station)
+ pc.printf("\n---------- Setting Mode ----------\r\n");
+ strcpy(snd, "AT+CWMODE=1\r\n");
+ SendCMD(snd);
+ GetReply(1000,buf,sizeof(buf));
+
+
+ // set CIPMUX to 0=Single,1=Multi
+ pc.printf("\n-------- Setting Connection Mode ---------\r\n");
+ strcpy(snd, "AT+CIPMUX=1\r\n");
+ SendCMD(snd);
+ GetReply(1000,buf,sizeof(buf));
+
+
+ pc.printf("\n---------- Listing Acces Points ----------\r\n");
+ strcpy(snd, "AT+CWLAP\r\n");
+ SendCMD(snd);
+ GetReply(3000,buf,sizeof(buf));
+ pc.printf(buf);
+
+ pc.printf("\n---------- Connecting to AP ----------\r\n");
+ pc.printf("ssid = %s pwd = %s\r\n",ssid,pwd);
+ strcpy(snd, "AT+CWJAP=\"");
+ strcat(snd, ssid);
+ strcat(snd, "\",\"");
+ strcat(snd, pwd);
+ strcat(snd, "\"\r\n");
+ SendCMD(snd);
+ GetReply(8000,buf,sizeof(buf));
+ pc.printf(buf);
+
+ pc.printf("\n------ Set Server Port -------\r\n");
+ sprintf(snd, "AT+CIPSERVER=1,%d\r\n", port);
+ SendCMD(snd);
+ GetReply(1000,buf,sizeof(buf));
+
+
+ pc.printf("\n----- Set Server Timeout -----\r\n");
+ sprintf(snd,"AT+CIPSTO=%d\r\n", 5);
+ SendCMD(snd);
+ GetReply(1000,buf,sizeof(buf));
+
+
+ pc.printf("\n---------- Get IP's ----------\r\n");
+ int weberror = true;
+ while(weberror) { // wait for valid IP
+ strcpy(snd, "AT+CIFSR\r\n");
+ SendCMD(snd);
+ GetReply(2000,buf,sizeof(buf));
+ pc.printf(buf);
+ if(strstr(buf, "0.0.0.0") == NULL) {
+ weberror=false;
+ }
+ }
+
+ pc.printf("\n------- Connection Up --------\r\n");
+
+}
+
+void SendCMD(char *cmd)
+{
+ esp.printf("%s", cmd);
+}
+
+void SendData(char *dat)
+{
+ esp.printf("%s", dat);
+}
+
+void GetReply(int timeout, char *buf, int size)
+{
+ char c;
+ ended=0;
+ count=0;
+ t.start();
+ memset(buf, '\0', size);
+ while(!ended) {
+ if(esp.readable()) {
+ c = esp.getc();
+
+ buf[count] = c;
+ count++;
+
+ if (c == '\r' || c == '\n') // OK will end
+ {
+ if (count > 2 && buf[count-3]== 'O' && buf[count-2] == 'K')
+ {
+ buf[count-1] = '\r';
+ buf[count] = '\n';
+ count = size;
+ }
+ }
+ }
+
+ if(t.read_ms() > timeout || count >= size) // Timeout or full
+ {
+ ended = 1;
+ t.stop();
+ t.reset();
+ }
+ }
+ //pc.printf(buf);
+}
+