problem with SDcard

Projects Programming
1

hi, what is the meanign the number four in this line ---if (!SD.begin(4))--- Could it change?

thanks

2

I am using arduino ethernet
how you can do if do you want to know the SD card is not failed . Not only at the begin of program , also when you call from a function each time that you need and check that you do not have a problems with SD card for example: It was broken or not right in its place.

thanks

3

hi, what is the meanign the number four in this line ---if (!SD.begin(4))--- Could it change?

It is the number of the slave select pin that is used to select the slave that the SPI data is sent to. Whether it can be changed depends on the hardware.

I am using arduino ethernet

Then, no it can't.