Help reading RC receiver with ATTiny85

Projects Programming
2

If you look at the reference for the ATTiny85, INT0 is on pin7 (PB2). Your code attaches an interrupt to pin 3.
Also, you should use the

attachInterrupt(digitalPinToInterrupt(pin), ISR, mode);

but I don't know if the ATTiny85 supports this mapping. If it does not, you can use

attachInterrupt(interrupt, ISR, mode);

where interrupt is 'INT0'