Multiple controller input?

- Teensy does work only with Nomad, only Arduino Mega and Uno are actual supported with consoles
- Use HMI displays like Nextion which uses only a Serial port or use Text LCDs
- Conventional graphic display needs a lot of code and gives many problems.
- For Text LCDs use displays with build in I2C expander.
- You can use I/O expander like e.g. MCP23017 or MCP23s17 if you don't have enough pins.
- It should possible to use more than one controller unit but I don't have tested yet.
- Teensy is needed when you want to use dynamic parameters because you need much RAM

Hello sstaub, thanks for your quick detailed input. Usually I work on an ION in theatre which is already fine for me but for touring purpose I started NOMAD which is also already a good solution in general but for moving light programming I still like to have encoders, also faders for quick submaster and effect changes.

Therefore a Teensy is fine. I read that it is faster in clock rate then Arduino . I will do some research about I/O expander. Maybe that will already do the job. The displays would be  nice add ons. I will definitely follow your advise and use simple Text LCDs. 
As a basis I want to try your or Druuks code examples which are appreciated a lot. Thanks for the sharing

You can try the code from https://github.com/sstaub/eOS 
I'm rewriting the library for the Raspberry Pi Pico which has unfortunately only 3 Analog Inputs,
but it will need some time.