SPI conflict: nRF24L01+ wants the same pins as my MAX7219 LED dot matrix display
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Hello there!
My MAX7219 LED dot matrix display is working great using hardware SPI using pin 11 for MOSI and pin 13 for SCK on a Arduino NANO.
Now, I'd like to use a nRF24L01+ radio as well which also claims using the same ports 11 and 13 for MOSI and SCK.MAX7219 can use software SPI instead so that I can use any digital pins of the Arduino. The problem is that when using software SPI it turns out to be slower and it doesn't look well on my double height display (2x8 matrixes). The upper part of the double height display lags. Therefore I'd like to use pin 11 and pin 13 for the MAX7219 LED dot matrix display but AFAIK the radio must use the same pins.
Any ideas how that can be solved?!
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Hello there!
My MAX7219 LED dot matrix display is working great using hardware SPI using pin 11 for MOSI and pin 13 for SCK on a Arduino NANO.
Now, I'd like to use a nRF24L01+ radio as well which also claims using the same ports 11 and 13 for MOSI and SCK.MAX7219 can use software SPI instead so that I can use any digital pins of the Arduino. The problem is that when using software SPI it turns out to be slower and it doesn't look well on my double height display (2x8 matrixes). The upper part of the double height display lags. Therefore I'd like to use pin 11 and pin 13 for the MAX7219 LED dot matrix display but AFAIK the radio must use the same pins.
Any ideas how that can be solved?!
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@รอเร-อ you can put the nrf24 on software spi instead, and keep the hardware spi for the display. Instructions are available at https://www.mysensors.org/build/ethernet_gateway
@mfalkvidd Thanks a lot!
I just made some tests and it looks promising. :grin: :grin: :grin:
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