As the question states, my Pi (3 B+) won't accept SSH connections (times out) when I have either my NRF24L01 or ATTiny85 boards hooked-up. I hook both up (at different times of course) to pins 17, 19, 21, 23 and 25 for SPI communications.
When the pins are already connected at boot up, the SSH terminal always times out; but I can unhook the pins before boot-up and SSH works fine. I then have to put all of the pins back on to continue what I was intending to do. Very annoying to say the least!
My question is: Why would this be the case?