In the past ELK had a product that would interface with DALLAS iButton "1-wire", does the M1 have the same compatability?
Yes, the M1 can now interface with a Dallas iButton reader through a new product called the ELK-M1KAM Access Interface. This product is similar to an M1 Keypad except that it does not have a display or any keys. It is designed to accept either a 26bit Wiegand Prox reader or a Dallas iButton reader and to be used to unlock a door. It features a SPDT Relay, inputs for door status and request to exit, plus outputs for door hold open alarm, and Ready/Armed status indicatorss. It currently does not support any other "1-wire" devices other than the iButtons.