BTbricks/brickster-bluetooth-receiver — pull request #10 by codefox421 (2014-08-14 04:55:18+00:00)
Title: Increase baudrate to 57600

The faster the Bluetooth module and µC talk to each other, the less it interferes with PWM driving. 115200 seems to be too much for the ATtiny84 to handle (at least while running on the internal oscillator). Some values (noted as "verified minimum") have been tuned using iterative experimentation.