![\"3039bdgm\"](\"http:\/\/www.goodjobsucking.com\/wp-content\/uploads\/2009\/11\/3039bdgm1-300x159.gif\" "\\"3039bdgm\\"")
Using the Internet Wayback Machine<\/a> to go back to 1998, I located a nifty diagram of the system from Smart Home<\/a>, from whom I originally purchased the unit.\u00a0 Ten years ago, it was in the process of being replaced by the TX15-B, a more modern-looking unit — and the only one mentioned on the web site of the manufacturer.<\/p>\nSome experimentation demonstrated that the TX10-B substantially uses the same procotol as the TX15-B, which is documented here<\/a>.\u00a0 It doesn’t seem to support the “autosend” feature, nor does it respond to requests for the outdoor temperature, but otherwise, the document appears to be accurate.<\/p>\n The unit uses the venerable TW-523 to communicate, and I was mildly surprised to discover that my TW-523 was capable of receiving, but not sending.\u00a0 Since the TX10 it was connected to wasn’t capable of sending, either, it may have been defective on the day I bought it, and I’d never have known.<\/p>\n (Yes, it took me 10 years to get around to this project, but now all that’s left to do is the software…)<\/p>\n","protected":false},"excerpt":{"rendered":" A little over 10 years ago, I bought an open-box RCS TX10-B thermostat control unit to replace a TX10 unit.\u00a0 “Open Box” means it came without any documentation, but it should, in theory, be a drop-in replacement for the TX10 — the “B” designator indicates that it’s capable of reporting \u2026 Continue reading