Can anyone help with a nrf24 question?

RE: Can anyone help with a nrf24 question?

Kenneth — Thu, 05 Dec 2024 16:16:54 GMT

The IRQ was an optional pin yes. Sorry, don't have the possibility to look into this anymore, I did update the initial reply with further information. Hope you are able to resolve this one way or the other, as you know, we have since come with a various of new nRF devices that can replace the nRF24-series. I would be happy to support you on those.

Kenneth

RE: Can anyone help with a nrf24 question?

ulao — Wed, 04 Dec 2024 23:16:55 GMT

Hi Kenneth, thx for helping. Its been a long time but if I recall the IRQ pin was an optional pin. I do not use it for the design.

As for the second, the RX_DR I thought was for packet arrival not Auto Ack?

My confusion was on the TX_DS when using auto ack. For a short example.

Send some data, wait for TX_DS

My understanding is that the TX_DS bit is set high once ACK is received. I do see this occur, but shortly after that it is set low, and I do not understand why? I'd expect it to remain high until I write a 1 to it.

RE: Can anyone help with a nrf24 question?

Kenneth — Wed, 04 Dec 2024 09:27:00 GMT

Hello,

As you are already aware, we don't support development on the nRF24-series anymore.

Not entirely sure I understand the problem, but make sure to carefully read the all the "Note:" in the datasheet, for instance maybe this one applies:

Also in terms of handling an packet:

You can find a link to the product specification here that contain useful transaction diagrams:
https://docs.nordicsemi.com/bundle/nRF24L01P_PS_v1.0/resource/nRF24L01P_PS_v1.0.pdf

There is also an attachment in this case that describe how to use the various modes of ESB:
RE: Facing issue with Dynamic payload of Ack NRF24l01

Be aware there exists a lot of fake nRF24L01 out there, with similar marking, and we know they behave differently when it comes to ack.

Hope that is useful,
Kenneth