RE: Are nRF52810 device able to operate with reliability over 8 hours of continue connection?

Sigurd — Tue, 13 Aug 2019 08:43:57 GMT

[quote userid="82436" url="~/f/nordic-q-a/50841/are-nrf52810-device-able-to-operate-with-reliability-over-8-hours-of-continue-connection"]- Are two nRF52810 able to be connected together for regular data polling or regular data transmitting?[/quote]

Yes, it's possible, but as Turbo J mentions, the central would need to use the S132 softdevice(BLE stack). Based on flash and ram requirements of your application, it could be a good idea to use the nRF52832 for the central device.

[quote userid="82436" url="~/f/nordic-q-a/50841/are-nrf52810-device-able-to-operate-with-reliability-over-8-hours-of-continue-connection"]- Are nRF52810 device able to operate with reliability over 8 hours of continue connection?[/quote]

Yes.

[quote userid="82436" url="~/f/nordic-q-a/50841/are-nrf52810-device-able-to-operate-with-reliability-over-8-hours-of-continue-connection"]This mean no packet losses, no connection losses and no system crashes/loops.[/quote]

The device will retransmit the packet until received by the peer or until you get a disconnect. If the packet is not acknowledged by the peer within the supervision timeout, the link will get disconnected.

[quote userid="82436" url="~/f/nordic-q-a/50841/are-nrf52810-device-able-to-operate-with-reliability-over-8-hours-of-continue-connection"]Is there some kind of re connection if this is lost[/quote]

If the link is disconnected, the peripheral will typically start advertising again, and the central could then connect to the peripheral again.

[quote userid="82436" url="~/f/nordic-q-a/50841/are-nrf52810-device-able-to-operate-with-reliability-over-8-hours-of-continue-connection"]or a watchdog if MCU is in crash/loop able to reset it?[/quote]

Yes, the nRF52 has a watchdog peripheral that can do that. See this link.

Yes.

[quote userid="82436" url="~/f/nordic-q-a/50841/are-nrf52810-device-able-to-operate-with-reliability-over-8-hours-of-continue-connection"]About how to match two device, do you think possible during manufacturing to insert inside memory (using NFC interface) two unique IDs of Master and Slave to create this association?[/quote]

You can store your value in either flash or UICR, but you could also just use the value in the FICR DEVICEID register (randomly generated (FIPS compliant) at time of production)

RE: Are nRF52810 device able to operate with reliability over 8 hours of continue connection?

Turbo J — Fri, 09 Aug 2019 17:41:51 GMT

Do a bit more research: In Bluetooth low Energy, there are Central and Peripherial devices. Slavery was abolished. ;-)

Unfortunately the S112 Stack can only be Peripherial, and the S132 is VERY BIG on flash consumtion. So you really want an nRF52832 or nRF52840 as the Central device.

You cannot connect 2 NRF-based devices with NFC, as the chip can only implement the "passive" or "tag" side - and the other side is powering the RF field.

[quote userid="82436" url="~/f/nordic-q-a/50841/are-nrf52810-device-able-to-operate-with-reliability-over-8-hours-of-continue-connection"]Are two nRF52810 able to be unique connected together[/quote]

Yes. Look at how the BLE examples use peer manager and whitelisting.