WOR (Wake On Radio) Functionality

[Vladimir Aparin]

My customer looking for very low power solution for their project. It's not reuired fast answer of node in network or permanent connection with each device. Just a rarely updating (one to some days). So they want to turn radio off as much as posible to decrease power consumption. At the same time they don't want long delay between sessions (1 hour period for example).

Therefore they very interested in WOR technology by TI http://www.ti.com/lit/an/swra126b/swra126b.pdf

Does the Nordic Semiconductor have something similar? Or how it can be implemented?

Detail comparison will be very interested.

[Turbo J]

Wake-on-radio is basically useless on 2.4 GHz, because radio RX operation is quite expensive.

OP unfortunately did not specify if he actually needs a low power central or only low power peripherials.

A peripherial can only be connected to when it is actively advertising - which is a blessing since its receiver will only be active for a short time after each advertising transmission. The advertising interval is a tradeoff between power consumtion and "time to connect".

In case you actually need a low power central, you could set up a sparse scanning intervall or just turn off the scanner repeatedly.

Alternatively, one could use a long connection intervall and just keep the connection alive. I used a one second intervall which uses about 50-60µA including quite a bit for the actual sensor measuring.

The power calculator spits out less than 10µA for actual BTLE radio+CPU core usage for a BLE interval of 1000ms.