Don't you mean CDMA? Regards, Jim > -------- Original Message -------- > Subject: RE: [EE} Collision detection > From: "Harold Hallikainen" > Date: Sun, October 22, 2017 7:30 pm > To: "Microcontroller discussion list - Public." >=20 >=20 > I think RS485 chips will survive contention without damage. I've done > master/slave systems with multiple slaves. That avoids contention since > the slaves only respond to requests from the master. Another approach is > "mini-slotted" With a mini-slotted network, each device is allocated a > mini-slot time where it is allowed to start transmission. Once a device > comes on line during its minislot, it may continue transmitting > indefinitely. When it's done, the "site counter" continues to advance eac= h > mini-slot time. I've also called this an "absence of data token passing." > A lack of data "passes the token" to the next site in system. Finally, > there's CSMA with collision detection and random backoff. >=20 > Harold >=20 >=20 > --=20 > FCC Rules Updated Daily at http://www.hallikainen.com > Not sent from an iPhone. > --=20 > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .