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
- Committer:
- WiredHome
- Date:
- 2018-09-01
- Revision:
- 5:6244e237def1
- Parent:
- 4:5da66fab599c
- Child:
- 6:80a97f156128
File content as of revision 5:6244e237def1:
// // A simple SSDP example // #include "mbed.h" // ver 120; mbed-rtos ver 111 #include "EthernetInterface.h" // ver 56 #include "SW_HTTPServer.h" // ver 57 #include "TimeInterface.h" // ver 24 #include "Watchdog.h" // ver 6 #include "SW_String.h" // ver 1 #include "SSDP.h" // ver 4 #include "WebPages.h" // Private handler for web queries // Comment out the next line if you do not have an RA8875 Display #include "RA8875.h" // ver 154 RawSerial pc(USBTX, USBRX); EthernetInterface eth; TimeInterface ntp(ð); Watchdog wd; time_t lastboottime; #ifdef RA8875_H #define LCD_W 480 #define LCD_H 272 #define LCD_C 16 RA8875 lcd(p5, p6, p7, p12, NC, p9,p10,p13, "tft"); // SPI:{MOSI,MISO,SCK,/ChipSelect,/reset}, I2C:{SDA,SCL,/IRQ}, name #endif LocalFileSystem local("local"); // some place to hold settings and maybe the static web pages const char * Server_Root = "/local"; // public for the WebPages handler to see // const char * BUILD_DATE = __DATE__ " " __TIME__; const char * PROG_NAME = "SSDP Server"; char * My_Name = "MBED SSDP Node"; const char * My_SerialNum = "0000001"; int Server_Port = 80; // end public information int main() { pc.baud(460800); pc.printf("\r\n%s Build %s\r\n", PROG_NAME, BUILD_DATE); lastboottime = ntp.timelocal(); if (wd.WatchdogCausedReset()) { pc.printf("**** Watchdog Event caused reset at %s ****\r\n", ntp.ctime(&lastboottime)); } wd.Configure(45); // very generous, but this is a network appliance, so a bit less deterministic. #ifdef RA8875_H lcd.init(LCD_W,LCD_H,LCD_C, 60); lcd.Backlight_u8(30); lcd.foreground(Red); lcd.printf("Initializing network interface...\r\n"); #endif pc.printf("Initializing network interface...\r\n"); if (0 == eth.init()) { #ifdef RA8875_H lcd.printf(" Name: %s\r\n", My_Name); #endif pc.printf("Name: %s\r\n", My_Name); eth.setName(My_Name); do { #ifdef RA8875_H lcd.printf(" Connecting to network...\r\n"); #endif pc.printf("Connecting to network...\r\n"); if (0 == eth.connect()) { int speed = eth.get_connection_speed(); pc.printf("Connected at %d Mb/s\r\n", speed); pc.printf("IP: %15s\r\n", eth.getIPAddress()); #ifdef RA8875_H lcd.printf(" Connected at %d Mb/s\r\n", speed); lcd.printf(" IP: %15s\r\n", eth.getIPAddress()); #endif HTTPServer svr(Server_Port, Server_Root, 15, 30, 20, 50, &pc); svr.RegisterHandler("/", RootPage); svr.RegisterHandler("/setup.xml", Setup_xml); SSDP ssdp(My_Name, eth.getMACAddress(), eth.getIPAddress(), Server_Port); ntp.set_dst("3/11,2:00","11/4,2:00"); // mm/dd,hh:mm ntp.set_tzo_min(-360); int res = ntp.setTime("pool.ntp.org"); while (eth.is_connected()) { wd.Service(); static time_t tLast; time_t tNow = ntp.timelocal(); if (tNow != tLast) { #ifdef RA8875_H lcd.SetTextFontSize(2); lcd.SetTextCursor(20,120); lcd.printf("%s", ntp.ctime(&tNow)); #endif pc.printf("time is %s\r\n", ntp.ctime(&tNow)); tLast = tNow; } // Any other work can happen here Thread::yield(); } #ifdef RA8875_H lcd.cls(); lcd.printf("lost network.\r\n"); #endif pc.printf("lost connection.\r\n"); eth.disconnect(); } else { #ifdef RA8875_H lcd.printf(" ... failed to connect\r\n"); #endif pc.printf(" ... failed to connect.\r\n"); } } while (1); } }