NRF24L01+ doesn't receive on pipes 2-5

RE: NRF24L01+ doesn't receive on pipes 2-5

Jack — Thu, 05 Feb 2015 18:52:22 GMT

Thank you for the reply, yes I figured it out :D Just wanted to share for in case someone else bumps into this problem, either with or without the specific library I mentioned.

RE: NRF24L01+ doesn't receive on pipes 2-5

Asbjørn — Thu, 05 Feb 2015 16:41:55 GMT

It sounds like you figured it out or am I misunderstanding something here? The order of the bytes is important as pipe 1-5 share 4 MSB and the LSB needs to unique.

RE: NRF24L01+ doesn't receive on pipes 2-5

Jack — Thu, 05 Feb 2015 10:16:05 GMT

The address for the pipes is shifted in LSB first. Pipe 2-5 share the 4 MSB's with pipe 1. In my code something happens like:

[code] address = "recv1"

shift this into the address for pipe 1. [/code]

And this is where things go wrong: "recv1" sort of implies the "1" is the LSB, but the code shifts this out to the NRF24 as the last byte, so the NRF treats it like the MSB. To the NRF the LSB is "r" !

Now in order to set pipe 2 to "recv2" I did:

[code] address = "recv2"

and shift this into pipe 2. [/code]

The code does pick the "2" as the LSB to shift out to the NRF (thinking address[4] is the LSB), but instead of setting the address to "recv2" we get "2ecv1".

My solution was to adapt the code so address runs from LSB to MSB, and for pipe 2-5 it uses address[0] to write for the LSB for one of the pipes 2-5.

Cheers,

Jack