Hi to control some light equipment I need a bus system to control it. On Sender and Receiver side will be an attiny. The distance will be minimum 5m max 10m. So I was reading i2c should be fine for up to 10m. But maybe you have better solutions. I want to realize it with what I have already. And don't want to buy extra bus systems. As electronic components I have resistors diodes connectors and maybe useful 50 Bss138 MOSFET and simple Ethernet cables.
As both attiny don't have a crystal I would prefer synchronous bus systems
Does the voltage level changes the distance I could transmit. So for example when I transmit with 20v instead of 5v
I realized I wasn't precise enough with my question. The project is more about some DIY Mc Gyver solutions rather then buying new things. As I just wanted to reuse some electronic components I collected during my last projects. For example three ATTiny 1626 and 861 already soldered on a headerboard. So it will be one ATTiny or a Raspberry on one side as a master controller and one ATTiny for each light on the other side. For switching the lights I already figured everything out. for example by using some solid state relay. Now I am just stucked with the communication. That's why i am asking. For example the Bss138 are also used in logic level converters. So maybe they could be used as amplifiers for longer distances. Or maybe building my own DMX or CAN bus.