Thank you for the fast reply.
I think that I understand what you mean: For the PIC, the , you mean that the NRF24L01 device is considered as a slave device , and the Pic is the master . Right ?
But so if the Raspberry send a request for data (i.e temperature), how can the Pic be only waiting for a request to come from the Raspberry?
I have started my project with UART and 433Mhz transmitter, but the 433Mhz signal is too noisy ( when the Raspberry is now transmitting, the receiver pick up noise which makes the UART mad.)
So I decided to move to NRF24L01 which take care of the noise filtering in transmission but use a SPI interface.
May be I misunderstood the concept of the NRF24L01, as I thought it will allows me to transfer data in both direction as UART/RS232.
JP
The NRF24L01 is both a transmitter and a receiver on a single small board ,with only these pins + power supply.
=====================================================
IRQ
(this signal is active low and is controlled by three maskable interrupt sources)
•
CE (this signal is active high and is used to activate the chip in RX or TX mode)
•
CSN (SPI signal)
•
SCK (SPI signal)
•
MOSI (SPI signal)
•
MISO (SPI signal)
=============================================================