[arifroni]

I understand I can use openelec in Rpi with the harmony remote via IR or CEC (from TV, which I haven't tested yet). But is it possible to send any command via LAN (same as a remote for KODI in smartphone works)? I know harmony ultimate one doesnt have any wifi, but how about with the hub? does anyone have any experience with this?

[dandnsmith]

JSON might be what you're looking for, but you haven't given much in the way of pointers to what you're thinking.
(the obvious answer to what you asked is: how can it, it doesn't have ethernet connection either)

[Namoi]

AFAIK, the harmony hub send IR or Bluetooth signals, that's all.
For the remote, depending the one you own, it is RF signals only and additionally IR for the Ultimate version (maybe others too, but the smart control only sends RF).
Now, i think i read some devices recognized by the thub can convert those signals to wifi.
You'd better ask on the logitech forum.