Each receiver card listens orders from the computer with a NRF24L01 and has 5 channels (5 el wires).
From computer side, the choreography is recorded on an MAO software (Live) as a MIDI instrument. Notes correspond to the channels and MIDI channel correspond to the dancer. The emitter card is just a proxy between MIDI message and a homemade protocol. The emitter has an antena improving the range, about 30 meters.