Atmega328PB and RFM95W about atmega328pb-testing

[awatterott]

Do you use this board package for Arduino IDE? If yes, try the examples from the SPI library to check if it is working and if it is a software or hardware issue.

[Lanzones]

Sorry my mistake.. I probe once again the SPI pins to the RFM95W and I have attached the plots.. CS waveform should be acceptable I believe and the MISO only outputted a bit at the 2nd byte.. but still doesnt work though. The CLk by the way is around 5MHZ

I was thinking if the CPOL or LSBfirst/MSBfirst has been changed on the 328PB version of the chip that I dont know about. I have tried tried slowing down the comms to 1MHz but still doesnt work.

below 5V means micro side and 3.3V is the RFM95 lora module.

ch3mosi_ch4cs

ch3mosi_ch4miso

ch3miso_ch4misomicro

ch3mosi_ch4clk

[awatterott]

So SPI is working. You can flash an ATmega328(P) program to the ATmega328PB to verify that the hardware is working, because the chips are compatible in this way.
Further infos in the appnote Differences between ATmega328/P and ATmega328PB.
I have closed the issue, because it has nothing to do with the boards package.