Trying to communicate between NRF24L01+ (TX) and NRF51822 (RX)

RE: Trying to communicate between NRF24L01+ (TX) and NRF51822 (RX)

Kenneth — Sun, 03 Feb 2019 14:01:35 GMT

[quote user="Arvind123"]The examples are for nRF24LE and nRF24LU, which have on chip microcontroller, while I have an NRF24L01+ chips which I have connected to an ARM controller using the SPI port. In such a case, these examples cannot be used I guess.[/quote]

Internally there is an nRF24L01+ that is controlled through an internal SPI interface, so it should be possible to re-use this. The following application note may also be useful:

https://www.nordicsemi.com/-/media/DocLib/Other/App_Notes/nAN24-12.zip?la=en

[quote user="Arvind123"]The configurations that I have mentioned in the first post for both NRF24 & NRF51822 are compatible right?[/quote]

It seems you have followed the default values, so I can't see any obvious wrong. If you transmit from the nRF24L01+ you should see the VDD_PA pin toggle to ~1.8V for 100-200us during transmission. The pin will stay low during reception (and idle).

RE: Trying to communicate between NRF24L01+ (TX) and NRF51822 (RX)

Arvind123 — Sat, 02 Feb 2019 07:14:58 GMT

I downloaded the SDK for nRF24L and checked the enhanced shockburst examples.

The examples are for nRF24LE and nRF24LU, which have on chip microcontroller, while I have an NRF24L01+ chips which I have connected to an ARM controller using the SPI port. In such a case, these examples cannot be used I guess.

As you had mentioned, I had even tried using W_TX_PAYLOAD instead of W_TX_PAYLOAD_NOACK, but I'm still unable to establish connection.

The configurations that I have mentioned in the first post for both NRF24 & NRF51822 are compatible right?

RE: Trying to communicate between NRF24L01+ (TX) and NRF51822 (RX)

Kenneth — Tue, 08 Jan 2019 09:34:29 GMT

You should be able to use the ESB examples from nRFgo SDK v2.3 (nRF24L-series) with the nRF5 SDK (nRF51 or nRF52-series). Please use the examples with no change as a start. The only thing you need to modify is the following for the nRF5 SDK:
http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.2.0/esb_users_guide.html?cp=4_0_0_5_1_2#esb_backwards

The nRFgo SDK v2.3 is found here:
https://www.nordicsemi.com/Products/Low-power-short-range-wireless/nRF24-series

After installation you can find the ESB configuration here:
\nRFgo SDK 2.3.0.10040\source_code\projects\nrfgo_sdk\enhanced_shockburst_examples

As a start don't use W_TX_PAYLOAD_NOACK, but use the W_TX_PAYLOAD first, since that will work without any specific features enabled.