I need to make a people search system. I'd like tu use a 400 mW trasmitter (module at 433 MHz already made). The system must be made from more trasmitter/relay to assure a long distance trasmission. Some suggestion to resolve the trasmission conflict (all trasmitter with the same frequency) and assure reception (receiver can't transmit). My idea is: the master trasmitter (link to a personal computer) send the message, all relay that receive the message wait fo some mS than send again the message. Each trasmitter must attach a self number for assure rebounds of the message. Can it work? Thanks in Advance. =================================================== Alboni Giorgio Faenza (Ra) ITALY E-Mail: rac1337@racine.ravenna.it http://www.geocities.com/SiliconValley/Heights/5444 (Last Update: 19/06/97) ===================================================