04-08-2014, 09:52 AM
In theory you could replace the IR receiver and IR transmitter with some of those cheap as chips 433MHZ TX/RX radio pairs.
As the signal is already being modulated & encoded for IR, you could swap to RF instead.
You can get them on ebay for sub £2 shipped.
Enclosing into the key might be a difficulty, but no extra expense of additional boxes.
I've done similar to upgrade IR remotes to be through wall
As the signal is already being modulated & encoded for IR, you could swap to RF instead.
You can get them on ebay for sub £2 shipped.
Enclosing into the key might be a difficulty, but no extra expense of additional boxes.
I've done similar to upgrade IR remotes to be through wall