nRF24AP2 - SPI - response messages?

[mtbeck]

Hi

I use an avr attiny441 with the nRF24AP2. Communication is over SPI byte flow. After start up, I get the start-up-message from nRF24AP2. That's fine. Afterwards, when I want to assign a channel or set a Channel ID or everything else, I dont get any response messages from nRF24AP2. I think, the communication works, because when I send the messages above, I get the sync-byte from nRF24AP2 0xA5, afterwards just 0xFF, an dat the end of the packet nRF24AP2 pulls SEN to high. But afterwards, I never get any responses from the nRF24AP2, the nRF24AP2 never pulls SEN to low to show me that nRF24AP2 has any messages (in this case response message) for me.

Does anyone know anything about my problem?

Thanks.

[mtbeck]

Hi Kenneth

Thanks for your support.

I solved the problem. The first problem was the physical SEN-connection between my controller and the nrf24AP2, on one module it seems that the physical/electrical connection is lost.

On my second module, the SEN-connection was ok, but there was a bug in the checksum-calculation.

Now, it works.

Thanks.

Best regards