protocol

Smarter iKettle 2.0 protocol

Smarter iKettle 2.0 uses a binary protocol, either via UDP or TCP on port 2081.

Messages (commands and responses) use the syntax: <id> <args> <terminator>

The terminator is always byte 126, or ~ in ASCII.

Arguments use this syntax:

• <arg> is a single mandatory byte
• <[arg]> is a single optional byte
• <arg>{0,32} is mandatory, between 0 and 32 bytes

Everything else, including spurious } characters, are ASCII literals.

Commands

Command	Description	Args
5	Set network SSID	<ssid>{0,32}
7	Set wifi password	<password>{0,32}
12	Complete wifi setup
13	List wifi networks
21	Turn on kettle	<[temp]> <[unknown]>
22	Turn off kettle
44	Calibrate water sensor
65	Schedule request	(unknown)
100	Device info
109	Firmware update

Responses

Response	Description	Args
3	Command acknowledged
14	List of wifi networks	<ssid>{0,32},-<db>{2}}
20	Kettle status	<flag> <temp> <wlevel1><wlevel2> <unknown>
45	Calibrate completed response	<unknown> <unknown>
101	Device info response	<deviceType> <sdkVersion>

Wifi network list

Appears to be in form of: SSID,-db}

-db is the signal strength in dBm format.

Examples:

• MyWifi,-56}
• MyWifi,-56}OtherWifi,-82}

Useful info

• <wlevel1> appears to be:
  • 7 when the kettle is off the base
  • 8 when the kettle is on the base
• sending command 12 without previous SSID/password command appears to reset wifi to factory settings
• command 100 is used for discovery over UDP broadcast (after device setup is complete)
  • this fails on some/most routers, which don't propagate UDP broadcasts
• command 109 disables wifi and creates a 'iKettle Update' network
  • a hard device reset (hold power button for 10 seconds) required to fix