Source: Send email on event with EtherCard | JeeLabs.net Forum

Copy a string

Prototypes

#include <string.h>
char *strcpy(char *dest, char *src);
char *strncpy(char *dest, char *src, size_t n);

Description

These functions copy a string from one address to another, stopping at the NUL terminator on the srcstring.

strncpy() is just like strcpy(), except only the first n characters are actually copied. Beware that if you hit the limit, n before you get a NUL terminator on the src string, your dest string won’t be NUL-terminated. Beware! BEWARE!

(If the src string has fewer than n characters, it works just like strcpy().)

You can terminate the string yourself by sticking the '\0' in there yourself:

char s[10];
char foo = "My hovercraft is full of eels."; // more than 10 chars

strncpy(s, foo, 9); // only copy 9 chars into positions 0-8
s[9] = '\0';        // position 9 gets the terminator

Return Value

Both functions return dest for your convenience, at no extra charge.

Example

char *src = "hockey hockey hockey hockey hockey hockey hockey hockey";
char dest[20];

int len;

strcpy(dest, "I like "); // dest is now "I like "

len = strlen(dest);

// tricky, but let's use some pointer arithmetic and math to append
// as much of src as possible onto the end of dest, -1 on the length to
// leave room for the terminator:
strncpy(dest+len, src, sizeof(dest)-len-1);

// remember that sizeof() returns the size of the array in bytes
// and a char is a byte:
dest[sizeof(dest)-1] = '\0'; // terminate

// dest is now:       v null terminator
// I like hockey hocke 
// 01234567890123456789012345

See Also

Source: strcpy(), strncpy()

I have a function that gets a pointer , and it should then change that pointer to a new one, so void function (char *pointer) {    char data[40];   // some calculations    //send back respond     strcpy(pointer,data);   } I have read here that strcpy is a bad practice and that there are replacements(in Arduino? ) : http://stackoverflow.com/questions/12275381/strncpy-vs-sprintf What is the right command to change that pointer argument safely ?

Source: sprint or strcpy in arduino ?

how can I convert a byte array to Sting?Either I am to stupid to search nobody required it so far. Most likely the first option 🙂

Source: byte array to String

I’ve the ENC28J60 board up and running and I’m planning to use the webclient example to retrieve the weather forecast on regular basis using the following URL: http://gps.buienradar.nl/getrr.php?lat=52&lon=4

Source: Ethercard lib. and webclient example with big sites

Most of the Arduino users found problem in using DHCP mode with Ethernet Shield, this tutorial will help to solve most basic problems when using using Arduino and Ethernet Shield in DHCP Mode.

Source: Using DHCP Mode with Arduino and Ethernet Shield – EMBEDDED LABORATORY

Ethernet shield hostname

Source: Ethernet shield hostname

I am in a LAN and there are 3 Ubuntu, 2 Kubuntu, 2 Windows XP and 2 Windows 7. What commands or tools are available to see what PCs are connected to the LAN that it shows the name of the PC and the IP. Similar to tools like Angry IP that show all PCs in a LAN.

Note that I do not know the IPs or names of the computers connected to the LAN. So the tool or command should look for them to.

Source: networking – How to see all computers connected to a network – Ask Ubuntu

Source: EtherCard: EtherCard is a driver for the ENC28J60 chip, compatible with Arduino IDE.

Source: Comparison of EDA software – Wikipedia

DesignSpark PCB is a free electronics design software, (EDA software is a sub-class of computer-aided design (CAD) software.) Although there is no charge for the software, the user must register with the website to unlock the program and it displays advertisements which must be acknowledged before the user can begin working.

Source: DesignSpark PCB – Wikipedia