Hello All, i'm newbie to arduino and right now i'm making my first project with Mega 2560 and Sd card module,rfid rc522 ,It's a data logger,but i have problem with writing data to sd card ,it's error all the time when i tap card to rfid
i have String arrey[250] ,every time i tap it, sd card should write data(date, time, id, number)
but i get an error all the time
there one way that sd card can write that is set number of arrey <= 10 ( i don't want this)
this my code (just some part)
void testwrite()
{
int ID[] = {0,1,2,3,4,5,6,7,8,9,10};
/* int ID[] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,
51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,
101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,
151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,173,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,
201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241,242,243,244,245,246,247,248,249,250,
251,252,253,254,255,256,257,258,259,260}; */
String ket[] = { "---","Seang","Wi", "Peeb", "Rong","Ponn","Wai","Mao 1","HO","Jannna","Vin"};
dt = clock.getDateTime();
File myfile;
myFile = SD.open("Freq.csv", FILE_WRITE);
myFile.print((ID[r]));
myFile.print(",");
myFile.print((ket[r]));
myFile.print(",");
myFile.print(dt.hour);
myFile.print(":");
myFile.print(dt.minute);
myFile.print(":");
myFile.print(dt.second);
myFile.print(",");
myFile.println((pack[r]));
myFile.close();
}
how to slove this