Arduino "Card failed, or not present"(即找不到SD卡)错误解决方案

http://forum.arduino.cc/index.php?topic=28763.0

Arduino SD自带的例程都是有一个BUG的,必须在pinMode后面加上如下的第二行代码

pinMode(10, OUTPUT);
digitalWrite(10, HIGH); // davekw7x: If it's low, the Wiznet chip corrupts the SPI bus
原文地址:https://www.cnblogs.com/turtlegood/p/4491987.html