For any who are interested, I have a Daikin split system air conditioner with a BRP072A42 Wireless Lan controller added to it. These are fairly new and I am going to try and chase down more info about the API if I can.

At the moment I only have basic on/off and temp setting.

It takes http POST and GET commands.

This page gave a lot of help even though it isn't the same model.

Using something like postman rest client from chrome apps you can test http commands.

Running GET: http:///aircon/getcontrolinfo

You can return a list of current parameters.

To set them you can use

Running POST: http:///aircon/setcontrolinfo

You just have to place the parameters that were returned replacing the , with & You also don't need all the info that the sensors are returning.