David Smart / Mbed 2 deprecated SSDP_Server

An example demonstrating SSDP Discovery and a companion Web Server.

Dependencies:   mbed mbed-rtos Watchdog SW_HTTPServer SW_String EthernetInterface TimeInterface SSDP

This example program provides a framework -by- example.

It makes itself discoverable to the network using SSDP. From there, it is easy to access the embedded web server to interact with the embedded node.

The example, built on the LPC1768, provides interaction to turn the LEDs on and off via a web page that is discovered using the SSDP protocol.

It also picks up time via an NTP server.

main.cpp@9:13e4749ddfa2, 2020-01-12 (annotated)

Committer:
WiredHome
Date:
Sun Jan 12 23:03:03 2020 +0000
Revision:
9:13e4749ddfa2
Parent:
8:0b1efcef5e50 
Minor changes for debug only.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
WiredHome 0:de1dfa2ab813 1 //
WiredHome 0:de1dfa2ab813 2 // A simple SSDP example
WiredHome 0:de1dfa2ab813 3 //
WiredHome 8:0b1efcef5e50 4 #include "mbed.h" // testing mbed v128, mbed-rtos v121
WiredHome 0:de1dfa2ab813 5 #include "EthernetInterface.h" // ver 55
WiredHome 0:de1dfa2ab813 6 #include "SW_HTTPServer.h" // ver 50
WiredHome 0:de1dfa2ab813 7 #include "TimeInterface.h" // ver 23
WiredHome 0:de1dfa2ab813 8 #include "Watchdog.h" // ver 6
WiredHome 0:de1dfa2ab813 9 #include "SW_String.h" // ver 1
WiredHome 0:de1dfa2ab813 10 #include "SSDP.h" // ver 0
WiredHome 0:de1dfa2ab813 11
WiredHome 0:de1dfa2ab813 12 #include "WebPages.h" // Private handler for web queries
WiredHome 0:de1dfa2ab813 13
WiredHome 8:0b1efcef5e50 14 extern "C" void mbed_reset();
WiredHome 8:0b1efcef5e50 15
WiredHome 0:de1dfa2ab813 16 RawSerial pc(USBTX, USBRX);
WiredHome 0:de1dfa2ab813 17
WiredHome 0:de1dfa2ab813 18 EthernetInterface eth;
WiredHome 0:de1dfa2ab813 19 TimeInterface ntp(&eth);
WiredHome 0:de1dfa2ab813 20 Watchdog wd;
WiredHome 0:de1dfa2ab813 21 time_t lastboottime;
WiredHome 0:de1dfa2ab813 22
WiredHome 4:5da66fab599c 23 PwmOut signOfLife(LED4); // LED sign of life. 100% WD reset, 20% restart, sine-wave: running
WiredHome 4:5da66fab599c 24
WiredHome 0:de1dfa2ab813 25 //FlashFileSystem flash("flash"); // static files here for reliability and speed
WiredHome 0:de1dfa2ab813 26 LocalFileSystem local("local"); // some place to hold settings and maybe the static web pages
WiredHome 0:de1dfa2ab813 27 const char * Server_Root = "/local";
WiredHome 0:de1dfa2ab813 28
WiredHome 0:de1dfa2ab813 29 // public for the WebPages handler to see
WiredHome 0:de1dfa2ab813 30 //
WiredHome 0:de1dfa2ab813 31 const char * BUILD_DATE = __DATE__ " " __TIME__;
WiredHome 0:de1dfa2ab813 32 const char * PROG_NAME = "SSDP Server";
WiredHome 9:13e4749ddfa2 33 const char * My_Name = "MBED SSDP Node";
WiredHome 0:de1dfa2ab813 34 const char * My_SerialNum = "0000001";
WiredHome 4:5da66fab599c 35 int Server_Port = 80;
WiredHome 0:de1dfa2ab813 36 // end public information
WiredHome 0:de1dfa2ab813 37
WiredHome 0:de1dfa2ab813 38
WiredHome 4:5da66fab599c 39
WiredHome 4:5da66fab599c 40
WiredHome 4:5da66fab599c 41 /// ShowSignOfLife
WiredHome 4:5da66fab599c 42 ///
WiredHome 4:5da66fab599c 43 /// Pulse an LED to indicate a sign of life of the program.
WiredHome 4:5da66fab599c 44 /// This also has some moderate entertainment value.
WiredHome 4:5da66fab599c 45 ///
WiredHome 4:5da66fab599c 46 void ShowSignOfLife(int degreeIncrement = 1)
WiredHome 4:5da66fab599c 47 {
WiredHome 4:5da66fab599c 48 #define PI 3.14159265359
WiredHome 4:5da66fab599c 49 static int degrees = 0;
WiredHome 4:5da66fab599c 50 float v;
WiredHome 4:5da66fab599c 51
WiredHome 4:5da66fab599c 52 degrees += degreeIncrement;
WiredHome 4:5da66fab599c 53 v = sin(degrees * PI / 180)/2 + 0.5;
WiredHome 4:5da66fab599c 54 signOfLife = v; // a little dimmer
WiredHome 4:5da66fab599c 55 }
WiredHome 4:5da66fab599c 56
WiredHome 0:de1dfa2ab813 57 int main() {
WiredHome 0:de1dfa2ab813 58 pc.baud(460800);
WiredHome 0:de1dfa2ab813 59 pc.printf("\r\n%s Build %s\r\n", PROG_NAME, BUILD_DATE);
WiredHome 4:5da66fab599c 60 lastboottime = ntp.timelocal();
WiredHome 0:de1dfa2ab813 61 if (wd.WatchdogCausedReset()) {
WiredHome 0:de1dfa2ab813 62 pc.printf("**** Watchdog Event caused reset at %s ****\r\n", ntp.ctime(&lastboottime));
WiredHome 0:de1dfa2ab813 63 }
WiredHome 0:de1dfa2ab813 64 wd.Configure(45); // very generous, but this is a network appliance, so a bit less deterministic.
WiredHome 0:de1dfa2ab813 65
WiredHome 7:776244e5765a 66 int eRes = eth.init(); //Use DHCP
WiredHome 9:13e4749ddfa2 67 if (eRes < 0) {
WiredHome 9:13e4749ddfa2 68 printf("eth.init() returned %d, rebooting in 5 s.\r\n", eRes);
WiredHome 9:13e4749ddfa2 69 wait(5.0);
WiredHome 8:0b1efcef5e50 70 mbed_reset();
WiredHome 9:13e4749ddfa2 71 }
WiredHome 7:776244e5765a 72 eRes = eth.connect();
WiredHome 9:13e4749ddfa2 73 if (eRes < 0) {
WiredHome 9:13e4749ddfa2 74 printf("eth.connect() returned %d, rebooting in 5 s.\r\n", eRes);
WiredHome 9:13e4749ddfa2 75 wait(5.0);
WiredHome 8:0b1efcef5e50 76 mbed_reset();
WiredHome 9:13e4749ddfa2 77 }
WiredHome 7:776244e5765a 78 printf("IP: %s\r\n", eth.getIPAddress());
WiredHome 0:de1dfa2ab813 79 //Thread thr(SSDPListener, NULL, osPriorityLow);
WiredHome 0:de1dfa2ab813 80 HTTPServer svr(Server_Port, Server_Root, 15, 30, 20, 50, &pc);
WiredHome 0:de1dfa2ab813 81 svr.RegisterHandler("/", RootPage);
WiredHome 0:de1dfa2ab813 82 svr.RegisterHandler("/setup.xml", Setup_xml);
WiredHome 4:5da66fab599c 83 SSDP ssdp(My_Name, eth.getMACAddress(), eth.getIPAddress(), Server_Port);
WiredHome 4:5da66fab599c 84
WiredHome 9:13e4749ddfa2 85 bool setTheClock = true; // prime it
WiredHome 4:5da66fab599c 86
WiredHome 0:de1dfa2ab813 87 while (1) {
WiredHome 0:de1dfa2ab813 88 wd.Service();
WiredHome 0:de1dfa2ab813 89 svr.Poll(); // non-blocking, but also not deterministic
WiredHome 0:de1dfa2ab813 90 Thread::yield();
WiredHome 4:5da66fab599c 91 ShowSignOfLife(10);
WiredHome 9:13e4749ddfa2 92 if (setTheClock) {
WiredHome 9:13e4749ddfa2 93 setTheClock = false;
WiredHome 9:13e4749ddfa2 94 // Could read these from non-volatile
WiredHome 9:13e4749ddfa2 95 ntp.set_dst("3/11,2:00","11/4,2:00"); // mm/dd,hh:mm
WiredHome 9:13e4749ddfa2 96 ntp.set_tzo_min(-360);
WiredHome 9:13e4749ddfa2 97 int res = ntp.setTime("pool.ntp.org");
WiredHome 9:13e4749ddfa2 98 if (res == 0) {
WiredHome 9:13e4749ddfa2 99 pc.printf("Time was just set\r\n");
WiredHome 9:13e4749ddfa2 100 }
WiredHome 9:13e4749ddfa2 101 }
WiredHome 4:5da66fab599c 102 static time_t tLast;
WiredHome 4:5da66fab599c 103 time_t tNow = ntp.timelocal();
WiredHome 4:5da66fab599c 104 if (tNow != tLast) {
WiredHome 9:13e4749ddfa2 105 printf("time is %s\r\n", ntp.ctime(&tNow));
WiredHome 4:5da66fab599c 106 tLast = tNow;
WiredHome 9:13e4749ddfa2 107 //printf("Mem: %5d, %5d %5d\n", Thread::used_stack(), Thread::max_stack(), Thread::stack_size());
WiredHome 4:5da66fab599c 108 }
WiredHome 0:de1dfa2ab813 109 }
WiredHome 0:de1dfa2ab813 110 }