České fórum pro všechny nadšence do Arduina a dalších technologií.
https://forum.hwkitchen.cz/
Kód: Vybrat vše
HTTP hlavička
Další řádek HTTP hlavičky
....
Poslední řádek HTTP hlavičky
100Kód: Vybrat vše
int parseNum(char *a, int len) {
int out = 0;
int p = pow(10, len - 1);
for(int i = 0; i < len; i++) {
out += (a[i] - '0') * p;
p /= 10;
}
return out;
}Kód: Vybrat vše
#define A_SIZE 10
char a_cislo[A_SIZE];
void clearArray(char *a) {
for(int i = 0; i < A_SIZE; i++) {
a[i] = '\0';
}
}
int parseNum(char *a, int len) {
int out = 0;
int p = pow(10, len - 1);
for(int i = 0; i < len; i++) {
out += (a[i] - '0') * p;
p /= 10;
}
return out;
}
void setup() {
Serial.begin(9600);
clearArray(a_cislo);
// uložíme si do pole znaky 2556
a_cislo[0] = '2';
a_cislo[1] = '5';
a_cislo[2] = '5';
a_cislo[3] = '6';
int cislo = parseNum(a_cislo, 4);
Serial.println(cislo);
}
void loop() {
}
Ale radšej by som bol za Ethernet. 
Kód: Vybrat vše
#include <SPI.h>
#include <Ethernet.h>
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; //physical mac address
char serverName[] = "www.arduino.php5.sk"; // zoomkat's test web page server
IPAddress ip(192, 168, 2, 40);
EthernetClient client;
String readString, readString1;
int x=0; //for counting line feeds
char lf=10; //line feed character
//////////////////////
void setup(){
if (Ethernet.begin(mac) == 0) {
Serial.println("Failed to configure Ethernet using DHCP");
// no point in carrying on, so do nothing forevermore:
while(true);
}
Serial.begin(9600);
Serial.println("Better client test 5/13/13"); // so I can keep track of what is loaded
Serial.println("Send an e in serial monitor to test"); // what to do to test
}
void loop(){
// check for serial input
if (Serial.available() > 0) //if something in serial buffer
{
byte inChar; // sets inChar as a byte
inChar = Serial.read(); //gets byte from buffer
if(inChar == 'e') // checks to see byte is an e
{
sendGET(); // call sendGET function below when byte is an e
}
}
}
//////////////////////////
void sendGET() //client function to send/receive GET request data.
{
if (client.connect(serverName, 80)) { //starts client connection, checks for connection
Serial.println("connected");
client.println("GET /rosko/system/values/voda.txt HTTP/1.1"); //download text
client.println("Host: www.arduino.php5.sk");
client.println("Connection: close"); //close 1.1 persistent connection
client.println(); //end of get request
}
else {
Serial.println("connection failed"); //error message if no client connect
Serial.println();
}
while(client.connected() && !client.available()) delay(1); //waits for data
while (client.connected() || client.available()) { //connected or data available
char c = client.read(); //gets byte from ethernet buffer
Serial.print(c); //prints raw feed for testing
if (c==lf) x=(x+1); //counting line feeds
if (x==12) readString += c; //building readString
}
readString1 = (readString.substring(0,4)); //extracting "woohoo!"
Serial.println();
Serial.println();
Serial.print("Current data row:" );
Serial.println(readString); //the 10th line captured
Serial.println("Premenna je: ");
Serial.println(readString);
Serial.print("How we feeling?: ");
readString1 = (readString.substring(0,4)); //extracting "woohoo!"
Serial.println(readString1);
Serial.println("done");
Serial.println("disconnecting.");
Serial.println("==================");
Serial.println();
readString = ("");
readString1 = ("");
client.stop(); //stop client
}