I have exactly the same problem. Two different NRF24L01 modules. Raspbian stretch worked in the beginning, since the last update no more.

I use https://github.com/Gadgetoid//py-spidev/archive/master.zip together with https://github.com/BLavery/lib_nrf24

This seems to be on the SPI level. This thread: https://www.raspberrypi.org/forums/viewtopic.php?t=191540 indicates that the speed of the SPI bus might be set wrong.

The problem is that I use Python to access the bus and it is not evident how, when and where I should set the speed of the SPI bus.

Did you make any further progress?

EDIT:

I found it: In lib_nrf24.py in function:

"def begin(self, csn_pin ..." add after "self.spidev.open":

self.spidev.max_speed_hz = 4000000

(in my case 5 MHz did not work)

I have exactly the same problem. Two different NRF24L01 modules. Raspbian stretch worked in the beginning, since the last update no more.

I use https://github.com/Gadgetoid//py-spidev/archive/master.zip together with https://github.com/BLavery/lib_nrf24

This seems to be on the SPI level. This thread: https://www.raspberrypi.org/forums/viewtopic.php?t=191540 indicates that the speed of the SPI bus might be set wrong.

The problem is that I use Python to access the bus and it is not evident how, when and where I should set the speed of the SPI bus.

Did you make any further progress?

EDIT:

I found it: In lib_nrf24.py in function:

def begin(self, csn_pin ... after self.spidev.open add:

self.spidev.max_speed_hz = 4000000

(in my case 5 MHz did not work)

I have exactly the same problem. Two different NRF24L01 modules. Raspbian stretch worked in the beginning, since the last update no more.

I use https://github.com/Gadgetoid//py-spidev/archive/master.zip together with https://github.com/BLavery/lib_nrf24

This seems to be on the SPI level. This thread: https://www.raspberrypi.org/forums/viewtopic.php?t=191540 indicates that the speed of the SPI bus might be set wrong.

The problem is that I use Python to access the bus and it is not evident how, when and where I should set the speed of the SPI bus.

Did you make any further progress?

I have exactly the same problem. Two different NRF24L01 modules. Raspbian stretch worked in the beginning, since the last update no more.

I use https://github.com/Gadgetoid//py-spidev/archive/master.zip together with https://github.com/BLavery/lib_nrf24

This seems to be on the SPI level. This thread: https://www.raspberrypi.org/forums/viewtopic.php?t=191540 indicates that the speed of the SPI bus might be set wrong.

The problem is that I use Python to access the bus and it is not evident how, when and where I should set the speed of the SPI bus.

Did you make any further progress?

EDIT:

I found it: In lib_nrf24.py in function:

"def begin(self, csn_pin ..." add after "self.spidev.open":

self.spidev.max_speed_hz = 4000000

(in my case 5 MHz did not work)