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Bluetooth Power Modes

A project log for PIP-Watch

Pip-Watch (Personal Information Panel) is an open-source smart watch with an ePaper display, a bluetooth modem, and a Li-Ion accumulator.

JaraJara 09/29/2014 at 18:410 Comments

In previous post we discussed CPU power consumption in PIP-Watch. Today we look into Bluetooth power consumption because it is significant as much as the CPU power.

Bluetooth Radio States

Practically the only significant part that consumes a lot of power in Bluetooth modems is their radio transceiver. If the radio is switched off the module draws only small quiescent current (less than 2mA in BTM431). Radio is activated by modem to perform one of the following three actions:

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