Here is a quick writeup of the protocol for the iKettle taken from my Google+ post earlier this month. This protocol allows you to write your own software to control your iKettle or get notifications from it, so you can integrate it into your desktop or existing home automation system.
The iKettle is advertised as the first wifi kettle, available in UK since February 2014. I bought mine on pre-order back in October 2013. When you first turn on the kettle it acts as a wifi hotspot and they supply an app for Android and iPhone that reconfigures the kettle to then connect to your local wifi hotspot instead. The app then communicates with the kettle on your local network enabling you to turn it on, set some temperature options, and get notification when it has boiled.
Once connected to your local network the device responds to ping requests and listens on two tcp ports, 23 and 2000. The wifi connectivity is enabled by a third party serial to wifi interface board and it responds similar to a HLK-WIFI-M03. Port 23 is used to configure the wifi board itself (to tell it what network to connect to and so on). Port 2000 is passed through to the processor in the iKettle to handle the main interface to the kettle.
|Bit 6||Bit 5||Bit 4||Bit 3||Bit 2||Bit 1|
So, for example if you receive "sys status key=!" then buttons "100C" and "On" are currently active (and the kettle is therefore turned on and heating up to 100C).
|sys status 0x100||100C selected|
|sys status 0x95||95C selected|
|sys status 0x80||80C selected|
|sys status 0x100||65C selected|
|sys status 0x11||Warm selected|
|sys status 0x10||Warm has ended|
|sys status 0x5||Turned on|
|sys status 0x0||Turned off|
|sys status 0x8005||Warm length is 5 minutes|
|sys status 0x8010||Warm length is 10 minutes|
|sys status 0x8020||Warm length is 20 minutes|
|sys status 0x3||Reached temperature|
|sys status 0x2||Problem (boiled dry?)|
|sys status 0x1||Kettle was removed (whilst on)|
You can receive multiple status messages given one action, for example if you turn the kettle on you should get a "sys status 0x5" and a "sys status 0x100" showing the "on" and "100C" buttons are selected. When the kettle boils and turns off you'd get a "sys status 0x3" to notify you it boiled, followed by a "sys status 0x0" to indicate all the buttons are now off.
|set sys output 0x80||Select 100C button|
|set sys output 0x2||Select 95C button|
|set sys output 0x4000||Select 80C button|
|set sys output 0x200||Select 65C button|
|set sys output 0x8||Select Warm button|
|set sys output 0x8005||Warm option is 5 mins|
|set sys output 0x8010||Warm option is 10 mins|
|set sys output 0x8020||Warm option is 20 mins|
|set sys output 0x4||Select On button|
|set sys output 0x0||Turn off|
If you're interested in looking at the web interface you can enable it by connecting to port 23 using telnet or nc, entering the password, then issuing the commands "AT+WEBS=1\n" then "AT+PMTF\n" then "AT+Z\n" and then you can open up a webserver on port 80 of the kettle and change or review the settings. I would not recommend you mess around with this interface, you could easily break the iKettle in a way that you can't easily fix. The interface gives you the option of uploading new firmware, but if you do this you could get into a state where the kettle processor can't correctly configure the interface and you're left with a broken kettle. Also the firmware is just for the wifi serial interface, not for the kettle control (the port 2000 stuff above), so there probably isn't much point.
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