is there any way to let the attiny85 (uart-less) communicate with a softwareserial when it's clocked at 1mhz?
that's the what i thought for first... it should be not so complicate to bitbang an rs232 frame.. divide the clock and the baudrate to have the delay between two subsequent bits, send the start bit, transform the char in byte and send the 0 or the 1, send the stop bit.
But with this method in my tests, if i send "aaaa" i receive sometimes "aaaq" or sometimes the right string, or randomly "qqaq", i guess because of the internal oscillator and his low precision.
do you think TinyTune may help?
and why when i use the arduinoTiny core i'm not able to do it via the tinydebug serial at 1mhz?