Bussystem to connect sensor

Hello, since a while I am trying to connect my FSR sensors into an Arduino using a bus system
it would be easy if I only have like 4 or 5 sensors than I could use the analog or even with a multiplexer.
But I may have to connect over 240 sensors!

I thought about use the SPI protocol but in cascade, but once one slave is broken all the system stop to work.
To SPI I used digipak and a Arduino as master
Some has a really good idea how I can implement a bus, so that I can add how much sensors as a want?



SPI in a daisy-chain might work (depends on the chips) but as you say it's one out, all out.

What distances are involved?

You may need a proper network and that implies a CPU at each node/sensor.