Hi, I want to control Arduino side of Udoo with c code. On arduino side, I have a code like turn on LED when I press 1. When I wrote to terminal stty -F/dev/ttymxc3 cs8 115200 echo message> /dev/ttymxc3 1 it is working. But I wrote a simple c code at gedit. #include <stdio.h> int main(void) { int a; printf("character\n"); scanf("%d", &a); printf("echo message > /dev/ttymxc3 %d \n", a); return 0; } I execute program at terminal ./LED I input character and output is " echo message> /dev/ttymxc3 1 ". But it doesn't effect the Arduino side. I think, I must add some c code for serial but how I don't know. Can you help? Thank you.
Hi, printf("echo message > /dev/ttymxc3 %d \n", a); prints a string on stdio, you need a syscall to write this string on a "console". #include <stdio.h> #include <string.h> int main () { char command[50]; strcpy( command, "echo message > /dev/ttymxc3 1" ); system(command); return(0); } In next few days we'll release a guide to communicate on serial Regards
