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I am using rak modules UWB(RAK13801) and ETHERNET(RAK13800), both of them are in a Base Board Dual I/O core RAK19001. When I try working with any of them separately, it works fine, but when they are together it doesn't work. Is there anyone knows how to use two modules in rak Base Board Dual I/O core?. I read the documentation and I suppose it doesnt work because the control pin (SS) is the same to select the Ethernet and UWB. How can I fix that?

Using the docs, I have tried switching the SS pins when sending either UWB or Ethernet. But I only manage to get one to work at any given time.

Antonio Dominguez
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I'm not familiar with this specific IoT solution, but based on the information provided, it seems that using different CS pins to trigger different modules could be a viable approach. For instance, you can use pin 29 for UWB and pin 25 for Ethernet.

However, it's important to note that other pins may also be shared between the two modules, such as pin 38, which serves as a Reset for UWB and INT for Ethernet. Pin 37 could potentially serving as either another INT or an optional CS, as well as pin can serve as 31 WAKEUP and Reset. There are resistors labeled as 0 Ohm/NC (no connection) on schematics. I recommend checking the board to see if there are any jumpers that need to be properly assigned.

Wojciech Krupski
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