Excuse me, I was wrong. SS is not D10 on the Micro, it's a separate pin (PB0). But it must be output, otherwise the SPI doesn't work as a master. Remove the definition, the IDE should have the correct value.
So I'm missing a pinMode(SS, OUTPUT);
Excuse me, I was wrong. SS is not D10 on the Micro, it's a separate pin (PB0). But it must be output, otherwise the SPI doesn't work as a master. Remove the definition, the IDE should have the correct value.
So I'm missing a pinMode(SS, OUTPUT);