Diff: main.cpp

Revision:

0:d90e1f7bda1f

diff -r 000000000000 -r d90e1f7bda1f main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun May 13 16:31:13 2018 +0000
@@ -0,0 +1,168 @@
+/*
+This fun example was comleted by JohnnyK / odiin@seznam.cz 5/2018
+I am an amateur so this program and web pages are not perfect but working.
+In folder ForServer you can found .php files what you can use for control 3 GPIO (on/off) pins and show temperature on the page. For more follow Readme.txt
+THX Mbed team and Mbed community and all other who want to help other people be a maker :)
+
+I know Mbed web server is better/faster for gpio control but in my country it is not possible to take advantage of ipv6 without extra cost. Our standart is mixed ipv4/ipv6 but with dynamic and not public IP address.
+*/
+#include "mbed.h"
+#include "DS1820.h"
+#include "EthernetInterface.h"
+
+#define SERVER  "server.someweb.com"   // Here you must place your web server address
+#define PORT    80                              
+#define HOST    "yourweb.com"                   // Here you must place your web domain
+#define GPIOPAGE  "gpio.txt"                    // Name of TXT file for GPIO setting
+#define TEMPPAGE  "nucleoin.php"                // Name of web page for temperature add/update
+
+DigitalOut gpio[3] = {D8, LED2, LED3};
+DigitalOut myled1(LED1);
+InterruptIn button(USER_BUTTON);
+Serial pc(SERIAL_TX, SERIAL_RX);
+EthernetInterface net;
+DS1820  ds1820(A0);
+TCPSocket socket;
+Timer timer;
+Ticker ticker;
+
+float temperature;
+int gpioSet[3];
+int i;
+
+void liveLed();
+void justDoIt();
+void connectionStop();
+void softReset();
+
+int main() {
+    
+    pc.printf("Client running...\n");
+    // Attach the address of the interrupt handler routine for pushbutton
+    button.rise(&softReset);
+    // Live led
+    ticker.attach(&liveLed, 0.5);
+    // Bring up the ethernet interface
+    net.connect();
+    // Show the network address
+    const char *ip = net.get_ip_address();
+    // Check ip
+    if(ip){ 
+        pc.printf("IP address is: %s\n", ip);
+    }else{
+        pc.printf("No IP");
+        // Reset when no IP was detected
+        softReset();
+    }
+    // Begin DS1820
+    if(ds1820.begin()) {
+        // Start temperature conversion
+        ds1820.startConversion();
+        // Ĺet DS1820 complete the temperature conversion
+        wait(0.5);
+    } else {
+        pc.printf("No DS1820 sensor found!\r\n");
+        // Reset when no sencor was detected
+        softReset();
+    }
+    
+    timer.start();
+        
+    while(1){
+        wait(0.5); 
+        if(timer > 10){
+            pc.printf("Counter: %d\n", i++);
+            // Read temperature
+            temperature = ds1820.read();
+            pc.printf("Temperature = %3.1f\r\n", temperature);
+            // Start temperature conversion
+            ds1820.startConversion();
+            // Call function for temeperature send and request for gpio setting
+            justDoIt();
+            // Set gpio state for all gpio ports in array
+            for(int i = 0; i < 3; i++){
+                if (gpio[i].read()!= gpioSet[i]){ 
+                    // Set gpio from latest recieved meassege      
+                    gpio[i] = gpioSet[i];
+                }      
+            }
+            // Reset Timer
+            timer.reset();
+        }   
+    }  
+}
+
+void justDoIt() {
+    char sbuffer[100];
+    char rbuffer[250];
+    char *buffer;
+    int scount;
+    int rcount;
+    //*************************First request*************************  
+    // Open a socket on the network interface
+    socket.open(&net);
+    // Create a TCP connection to server and check of success
+    if (socket.connect(SERVER, PORT) < 0) {
+        pc.printf("Failed to connect with server\n\r");
+        connectionStop();
+    }
+    // Fill command string into buffer
+    sprintf(sbuffer,"GET /%s HTTP/1.1\r\nHost: %s\r\nConnection: close\r\n\r\n", GPIOPAGE, HOST);
+    // Send http request
+    scount = socket.send(sbuffer, sizeof sbuffer);
+    // Print shorter string of sended messeage
+    pc.printf("sent %d [%.*s]\n", scount, strstr(sbuffer, "\r\n")-sbuffer, sbuffer);
+    // Recieve simple http response
+    rcount = socket.recv(rbuffer, sizeof rbuffer);
+    // Print out the response
+    pc.printf("recv %d [%.*s]\n", rcount, strstr(rbuffer, "\r\n")-rbuffer, rbuffer);
+    // Ignore data from server and take only values after "gpio:" like 1 0 1
+    buffer = strstr(rbuffer, "gpio:")+ 5;
+    // Extract into int buffer
+    sscanf(buffer,"%d %d %d", &gpioSet[0], &gpioSet[1], &gpioSet[2]);
+    // Close the socket to return its memory 
+    socket.close(); 
+    wait(1);
+    //*************************Second request*************************
+    // Open a socket on the network interface
+    socket.open(&net);
+    // Create a TCP connection to server and check of success
+    if (socket.connect(SERVER, PORT) < 0) {
+        pc.printf("Failed to connect with server\n\r");
+        connectionStop();
+    }
+    // Fill command string into buffer
+    sprintf(sbuffer,"GET /%s/?temp=%3.1f HTTP/1.1\r\nHost: %s\r\nConnection: close\r\n\r\n", TEMPPAGE, temperature, HOST );
+    // Send http request
+    scount = socket.send(sbuffer, sizeof sbuffer);
+    pc.printf("sent %d [%.*s]\n", scount, strstr(sbuffer, "\r\n")-sbuffer, sbuffer);
+    // Recieve http response
+    rcount = socket.recv(rbuffer, sizeof rbuffer);
+    // Print out the response line
+    pc.printf("recv %d [%.*s]\n", rcount, strstr(rbuffer, "\r\n")-rbuffer, rbuffer);
+    // Close the socket to return its memory 
+    socket.close();  
+}
+
+void connectionStop(){
+        // Timer stop
+        timer.stop();
+        // Close the socket to return its memory 
+        socket.close();  
+        // Bring down the network interface
+        net.disconnect();
+        // Mbed reset
+        softReset();
+}
+
+void softReset(){
+        // Wait
+        wait(2);
+        // Mbed reset
+        NVIC_SystemReset();
+}
+
+void liveLed(){
+    // Change state of Led one
+    myled1 =! myled1;
+}
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