XENON SD Card and Ethernet not working

[Jimmie]

I am glad to see more people talk about this. I had commented a few weeks ago that the choice of pins for the Ethernet Featherwing is poor as it also eliminates the ability to use the second serial port of the Xenon.

Using a Xenon with an Ethernet Feather

The Particle Ethernet FeatherWing uses the standard SPI pins. However, it also uses three additional pins: Mesh Pin Ethernet FeatherWing Pin MISO SPI MISO MOSI SPI MOSI SCK SPI SCK D3 nRESET[1] D4 nINTERRUPT[1] D5 nCHIP SELECT[1] On the Xenon, Serial2 uses the pins below, which conflict with nInterrupt (D4) and nChipSelect (D5). Pin Use D4 TX for Serial2. Can be used as GPIO if not using Serial2. D5 RX for Serial2. Can be used as GPIO if not using Serial2. The…