NRF24L01+ working irregulary

[Fred Lamer]

Hi everyone,

I bought two NRF24L01+ off ebay a couple of week ago and started to work on them this week. I seem to have problem with establishing a reliable communication between both devices. I enabled Shockburst by setting register EN_AA all to "1" and register EN_RXADDR all to "1". I should then have auto-acknowledgement on the TX device. Both device work with the IRQ pin with external interrupt on my two MCU (ATMEGA8) and interrupt are masked with the STATUS register to show what interrupt is trigerred by the NRF. I seem to have a bad communication, but the packet still cross from the TX to the RX irregularly. I checked the value of the received packet and it is the same as the one sent., but no acknowledge received in the TX device...

Any fast thoughts on why it would do this?

Thanks, Fred

[Ivo Milev]

Hi Hakon,

Thanks for the quick response!

Yes, I am getting ACK only on PIPE0

My understandings are that I must change the TX address in the PRX module when I would like to transmit to the corresponding PTX device, isn't it correct? Then the PTX device should return ACK to the PRX device if the transmission was successful (CRC passed). And I can confirm that the transmission was successful for all tested PIPEs , but I am getting ACK only from PIPE0 at PRX side.

Please note that each PTX device got an ACK from the PRX , when PTX sent data to PRX.

I am following the architecture in the attached image

Best Regards, Ivo Milev

[Håkon Alseth]

You shouldn't change the PIPE0 address on the PRX, only on the PTX. So all PTX get "TX_DS" interrupt, but PRX does not get "RX_DR" interrupt? Is that correct?

BR Håkon