I didn't realise how far voice recognition had progressed. This light can understand several voice commands and react accordingly with no need for a network connection.
One slight correction. A longer test showed that the unit does not store the current state to flash memory, but will power up in a random state if left off for a while.
I couldn't identify the chip, which isn't surprising. It's not the sort of thing the manufacturer would expect hobbyists to use.
I'll guess that it's probably looking for key sounds. I used to have a crude voice recognition toy when I was younger, that asked questions and could recognise just two words - yes and no. Some experimentation showed that it really just recognised the "S" of yes and the "O" of no. Two distinct sounds that can be easily differentiated with simple filters.
The commands that this light recognises are:-
Turn on the light.
Turn off the light.
Change the colour.
Dim the light.
Brighten the light.
The (undocumented) dimming has five steps, and the light flashes once to indicate that it has reached the dimming limit in either direction.
The unit can be operated from a significant distance away, but is really intended for close use.
Current draw is about 300mA lit and 10mA in standby.
Sorry conspiracists - the unit can NOT listen in to your home and send your conversations to the Chinese government.
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