nRF52840 Demo Sleep Mode

RE: nRF52840 Demo Sleep Mode

Bjørn Kvaale — Fri, 06 Apr 2018 13:36:04 GMT

I'd say this is quite well documented in all of our sdk examples (see Testing section). Although it might seem intuitive to connect via the Bluetooth settings, it does not say in the testing examples section that you should connect your phone via the Bluetooth settings before using the nrf toolbox app.

RE: nRF52840 Demo Sleep Mode

adragocelestica — Thu, 05 Apr 2018 14:41:46 GMT

Oh, I almost forget. If i try to connect via Bluetooth from my Android device via the nRFTools app and Android has the nRF52840 as a BT linked device, the examples don't work properly and nRFTools disconnects me immediately. When I deleted the device from the BT linked devices, the examples started working again. You should really fix that, or at least write it down somewhere in the documentation, because it is quite frustrating at first to test a first example and not understanding why the connection is not working right.

RE: nRF52840 Demo Sleep Mode

adragocelestica — Thu, 05 Apr 2018 14:34:16 GMT

Yeah, I eventually solved it. Basically, the .hex I downloaded from Nordic was not doing it right. When I downloaded the full SDK, I loaded projects and it started working. You can reproduce the problem by taking a new board and just loading the .hex onto it, I guess.

Right now I am having other problems with it, but they don't proceed here, I will make a separate thread.

RE: nRF52840 Demo Sleep Mode

Bjørn Kvaale — Thu, 05 Apr 2018 12:05:05 GMT

When you refer to the heart rate and proximity demos, you mean these two applications, right: app 1, app 2? I could not find any info regarding setting the device to sleep by pressing button 1. Are you using SDK 15? Normally, the device will turn off after advertising for 180 seconds to save power. When you press button 1 when the device is sleeping, it normally turns on & continues advertising for 180 seconds & then goes to sleep if no central Bluetooth device connects to it (I am assuming your device is the peripheral device in this instance).

Basically: I believe the usage you mention is correct. The device will turn off after 180 seconds of advertising, button 1 turns advertising on again once the device is sleeping