Hey everyone. I'm new on physics forums, and I have a project that I would appreciate some help... This project is to make a wireless fencing unit (olympic fencing, not like farming...) that can connect via usb or bluetooth into a smartphone to simplify the tools for local referees. So, I have two choices: first - each fencer has their own microcontroller or something that can transmit bluetooth, this will connect via bluetooth to the smartphone. second - each fencer has their own microcontroller that can transmit wirelessly to a main microcontroller that has a usb interface compatible with android. for those that don't know about electric fencing - simply put there are three wires, all this has to do is be able to read from two of them. one of the wires is the supplied power. I am looking for the best bang for my buck. With minimal processing requirements, I don't need an expensive FPGA with a lot of memory for the microcontroller attached to the fencer. Thank you for your time everyone!!!