The Smart Remote 3 for nRF51 product example will be on as soon as the batteries are
inserted. The DK add-on can be powered either by the USB or the batteries.
Powering up the add-on requires the following steps:
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Plug in the USB cable or insert batteries into the battery compartment.
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If powered by the USB, turn on the power with the power switch. If powered by
the batteries it will be on as soon as the batteries are inserted.