Posting in this old thread because this is the google top entry for attiny85 i2c and the question is relevant.
Does anyone know how to change the slave address for an Attiny?
The default appears to be 0x26 from the TinyWireS library code but i've been looking in the attiny85 datasheet and cannot find where it's specified nor how to change it (because I don't know what to look for).
I want to change it to allow me to connect to two (or more) Attiny85's.