I need to connect a PiZ/SleepyPi2 to a an NRF24L01, to receive data from a tank sensor which is transmitting using another NRF24L01.
Problem is, the PiZ/SleepyPi2 are using the pins needed for SPI (for handshaking and programming) so I need some other mechanism.
I was thinking I could use one of these shields, which store and convert data from the NRF24L01 and make it accessible over I2C on address 35. When there's no data, I2C address 35 responds with 0x47. There's another topic in the forum which talk about this shield's limitations:
What would be an easier way to achieve what I need? I need the SleepyPi2 handshake and programming functions (which gracefully shut the RPI down etc). Would rather not hack the SleepyPi2 code or board to use other pins.
Any other ideas how to connect the Pi to the NRF24L01?