sergiu.mihu

Hi guys, I am trying to design a remote control probably on 400 MHz range, as I think will be enough for the data I want to send. 8 channels, solid state transistor outputs. The thing is that I never used radio modules before. I was looking at the Microchip RF modules, but I don't know exactly what to do if I have more devices transmitting on the same channel or so. What advice would you have in this way for me? Would using a PIC and coding and decoding the message be enough? What do I need to have in mind if the surrounding area will be full of electromagnetic waves? (industrial noise) About an emergency stop button - what algorithm or what way of designing the remote would one use for that? Thank you.