Currently I have Slave attiny with an IR receiver connected to it. From this it emits a byte relating to the button number pressed. This is called from 2 atmega328 uc’s. which changes the LED’s to the same colour on both boards.
My issue is that only one changes at a time, I believe due to the bus of i2c. So, does anyone have any ideas of how I can get round this? Or even a way of getting the atmega328’s to confirm to the slave when it has received the byte.