nRF24L01+ cannot receive data

[I6believe]

hello,we use nRF24l01+ for the communication of IoT,nRF24l01+ need to receive CMD from the controllors,but after a long time,nRF24l01+ cannot receive data.

we have tested,the following is the information related: (1)the supply voltage of the nRF24l01+ is 3.3V (2)CE is high，IRQ is high (3)we have made some protection mechanism in the code(compare the value read from some registers and to the cofigured value,the registers selected are CONFIG,RF_CH,RF_SETUP). When nRF24L01+ cannot receive data,we measure the waveform of CS/SCK/MISO/MOSI by the Oscilloscope,and the waveform of CS/SCK/MISO/MOSI is correct.

now,we dont know how to do next.would you give some advice,thank you very much.

[I6believe]

in addtion,after reset the device,nRF24L01+ is normal.

[I6believe]

hello,everyboby,who knows the reason or can give some advice,please tell me!

thank you very much~

[ovrebekk]

Hi

Have you checked if there is any data in the RX FIFO when this happens?

If the RX FIFO is full the device will stop receiving more packets, and you will not get any more interrupts.

Best regards

[I6believe]

thank you very much!

we have checked:the RX FIFO is really full,the problem happens only when there are so much RF data in the air.

we have added some protection mechanism,by far, the devices work normally.

thanks again!

best regards

[ovrebekk]

I am glad to hear you found a solution.
Whenever you read out a packet it is recommended to read out the data in a loop, making sure to keep reading out payloads as long as there is something in the buffer. Otherwise the FIFO could fill up, preventing the receiver from working.

Best regards