RE: How to wake up nrf52832 device?

Sunil519 — Wed, 15 May 2019 18:37:55 GMT

Hi,

Thee documentation has been moved. Can you please update the link?

Thanks,

Sunil

RE: How to wake up nrf52832 device?

ani — Fri, 29 Mar 2019 10:48:13 GMT

Thank you for the response.

RE: How to wake up nrf52832 device?

Bjørn Kvaale — Fri, 29 Mar 2019 08:54:41 GMT

Which device are you talking about now? The low power node or the regular mesh node (the server node)? The regular light switch server node does not sleep, as it must listen to incoming messages from other nodes. The same applies to friend nodes.

The low power node, on the other hand, is able to wake up for a period of time & then go to sleep again.

The documentation provided here (link 1, link 2) is very useful. To summarize the doc, first a friendship is established between a friend node & a low power node (LPN). The friend node can have multiple friendships with different LPNs, but the LPN can only have one friendship with a friend node. During the friendship establishment process, three key parameters are decided, the receive delay, the receive window & the poll timeout.

The LPN sends a request to the friend node for a status update (i.e. all of the messages & security updates the LPN has missed while it has been asleep). The friend node then waits until the receive delay time has expired before it starts sending messages to the LPN.

The receive window is the time period in which the friend node has to send messages to the LPN. Once the LPN has received all of the messages or the receive window has expired, then the LPN will go back to sleep.

The poll timeout is the time period in which a LPN must send consecutive requests for updates to the Friend Node. If the LPN does not do this, then the friend node will terminate the friendship with the LPN.

For more info, read the documentation. It is very detailed & easy to understand.

RE: How to wake up nrf52832 device?

ani — Thu, 28 Mar 2019 12:36:01 GMT

Actually my question is the device should always be in sleep mode when ever we have to send some notifications it should wake up, again it has to go to sleep.is it possible?

RE: How to wake up nrf52832 device?

Bjørn Kvaale — Wed, 27 Mar 2019 09:00:11 GMT

It is possible to provision a regular light switch server & the low power node (LPN) via nRF Mesh (see documentation).