Diff: main.cpp

Revision:

2:f2188521d606

Parent:

1:b658dfbe2a7c

--- a/main.cpp	Sat Mar 07 19:26:48 2020 +0000
+++ b/main.cpp	Sun Nov 08 13:08:36 2020 +0000
@@ -1,11 +1,81 @@
 #include "mbed.h"
 #include "EthernetInterface.h"
+#include <string>
 
+//RGB led
+PwmOut r (D5);
+PwmOut g (D8);
+PwmOut b (D9);
 
 DigitalOut led(LED1);
 
-int main()
-{
+void select_state(){
+        while(1){
+                lcd.cls();
+                lcd.locate(0,3);
+                lcd.printf("Select State by moving the joystick \n");
+                lcd.printf("And select by pressing the joystick \n");
+                if(left) {
+                    lcd.cls();
+                    lcd.printf("The node is a reciever");
+                    sender = false;
+                    }
+                if(right){
+                    lcd.cls();
+                    lcd.printf("The node is a sender");
+                    sender = true;
+                    }
+                if(select){
+                    lcd.cls();
+                    break;
+                    }
+            }
+    }
+
+void select_reciever_id(){
+        while(1){
+                lcd.cls();
+                lcd.locate(0,3);
+                lcd.printf("Select reciever id by moving the joystick \n");
+                lcd.printf("And select by pressing the joystick");
+                if(left && id_of_reciever > 0) {
+                    lcd.cls();
+                    id_of_reciever -= 1;
+                    lcd.printf("The reciever id is: ", id_of_reciever);
+                    }
+                if(right && id_of_reciever < 255){
+                    lcd.cls();
+                    id_of_reciever += 1;
+                    lcd.printf("The reciever id is: ", id_of_reciever);
+                    }
+                if(select){
+                    lcd.cls();
+                    break;
+                    }
+            }
+    }
+    
+void rgb_led(){
+    r.period(0.001);
+    while(1) {
+        for(float i = buffer[2]/255; i < 1.0 ; i += 0.001) {
+            float p = 3 * i;
+            r = 1.0 - ((p < 1.0) ? 1.0 - p : (p > 2.0) ? p - 2.0 : 0.0);
+            g = 1.0 - ((p < 1.0) ? p : (p > 2.0) ? 0.0 : 2.0 - p);
+            b = 1.0 - ((p < 1.0) ? 0.0 : (p > 2.0) ? 3.0 - p : p - 1.0);  ;  
+            wait (0.01);
+            }
+        }
+    }
+
+void display_temperature(){
+    lcd.cls();
+    lcd.locate(0,3);
+    lcd.printf("The recieved temperature is: ", buffer[0]);
+    lcd.printf(",", buffer[1]);
+    }
+
+void connect_server(int port) {
     printf("Server example\n\r");
     
     EthernetInterface eth;
@@ -16,23 +86,53 @@
     
     TCPServer srv(&eth);  
     
-    srv.bind(4000);
+    srv.bind(port);
     
     srv.listen();
+    }
     
-    while(true){
+void set_connection(){
         TCPSocket client;
         SocketAddress client_addr;
-        char *buffer = "Hello TCP client!\r\n";
         
         srv.accept(&client, &client_addr);
         
         printf("Accepted %s:%d\n\r", client_addr.get_ip_address(), 
                     client_addr.get_port());
-                    
-        client.send(buffer, 256);
+        }
+
+int main()
+{
+        bool sender = false;
+        char buffer[255];
+        int i = 4; //value of i is 4 because the first 4 items in the buffer has already values stored(buffer[0],buffer[1],buffer[2],buffer[3],) so we have to add values starting with buffer[4]
+        int id_of_reciever = 1;
+
+    connect_server(4000); //connect server on port 4000
     
-        client.close();
+    while(true){        
+
+        set_connection(); //connect with client
+        
+        select_state(); //Is the node sender/reciever?
+        select_reciever_id(); //each node wether sender/reciever needs to select reciever id (round-robin)
+        
+        if(sender = false){
+            do{
+            int n = client.receive(buffer, sizeof(buffer));
+            if(n > 0){ //Makes sure the packet is recieved
+                size_t found = client_addr.get_ip_address().find_last_of("."); //find last '.' of the ip address ex. 192.168.0.13
+                buffer[i] = client_addr.get_ip_address().substr(found+1); //Give the number after the last '.' in this ex. 13 that is the sender ID
+                i++;
+                                                                        //Other examples at: http://www.cplusplus.com/reference/string/string/find_last_of/
+                client.send(buffer, sizeof(buffer));
+                }
+            display_temperature(); //Display recieved temperature of sender on lcd
+            rgb_led(); //Display rgb_led with recieved pwm value of sender
+            }while(buffer[3] != buffer[i]) //Keeps looping untill the ID of the first sender ID is the same
+            
+            }
+        client.close(); //Stop communication with client
         
     }
 }