@Matt,
Thanks!
To any other newcomers who may come across this thread while learning about Indigo and its ability to interop with old X10 equipment:
- you don't need to add the RR501 transceiver or MT522 mini-timer as a Device in Indigo in order for it to receive X10 commands that they send out. Indigo (through the 2413U) listens for X10 commands that are put 'on the wire' by X10 controllers. These incoming X10 messages are received/decoded by Indigo and show up in the Event Log. This just happens - you do not have to configure the RR501 (or MT522) as an Indigo device. However, the RR501 only receives X10 codes corresponding to the house code set on its rotary switch. It ignores commands for other house codes, presumably to reduce the likelihood of interference from neighboring houses.
- you can create triggers in Indigo based on these X10 commands that are issued by X10 controllers. Such a trigger can then control any X10 or Insteon (or Zwave) device.
- since the RR501 can only receive RF commands from a single house code, all your X10 remotes, motion sensors and switchpads need to be set to the same house code. But Indigo can use these incoming signals as triggers to control X10 devices on other house codes.
- the RR501 transceiver also contains a controllable outlet switched by a relay. It's effectively an X10 appliance module. If you want to get Indigo to control it, add it as a device of type Appliance Module, either unit=1 or unit=9.
- after a lot of testing at my house (moving various pieces of kit to different outlets on different circuits), I've concluded:
- the X10 transmitter in the 2413U is less powerful than that in the RR501 and MT522. The latter two controllers can successfully send X10 commands to various X10 devices that the 2413U cannot reliably reach.
- the X10 receiver in the 2413U is less responsive to signals sent from the RR501/MT522 than the various X10 lamp modules that I have on hand. The 2413U will miss the occasional X10 command (it doesn't appear in the log) that a X10 lamp module will react to).
With judicious placement of my old X10 modules, I've been able to retain the past investment in X10 gear. I've started deployment some new Insteon devices, while continuing to use my RR501, X10 remotes and X10 motion sensors to control things as desired.