ANT Forum

Hi,
I want to use NRF51422 for an application. NRF51422 as a key, the key must be real-time online to ensure that the host can detect it at any time. It using a CR2032 button battery. How can I reduce the power consumption to ensure a longer using time?
Thanks.      

Hi,

The 422 has a couple hardware features that save power such as the onboard voltage regulator which you can read about in Nordic's documentation for the part.

In terms of ANT messaging, the best you can do is to reduce your master channel period to as low as what's acceptable for your application. If you need to transmit slower than 0.5Hz, your host must be in continuous scanning mode to allow for asynchronous communication, or running a background scanning channel in high duty search (you may also use a transmit-only channel which would also significantly cut the power but is STRONGLY NOT RECOMMENDED due to the disabling of ANT coexistence features and should be a last resort).

You may use the power estimator to see what works for your use case.

Cheers