RF 433 control of DI-O or Chacon devices

Does anyone have experience controlling switches from the Chacon/DI-O brand?
I have a couple of DI-O lighting modules activated by motion detection wall switches. I would like to control the switches with an arduino combined with a typical RF Transmitter Receiver Module 433MHz Wireless Link Kit.

I've looked into RCswitch and HRCSwitch, but I can't detect the signals from the motion detection wall switches or activate the modules.

RCswitch works great sending signals between the RF transmitter/sender, just doesn't detect anything from the DI-O gear.

Gear:

Thanks for your help!

Have they made their API available?

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