Issue: Understand the role of the two UARTs - exposing the correct port to allow upgrade of the 4200 / RUI programming
Setup: Creating a PCB with the 4200 + Nano Every
I’ve got my RAK811 / Arduino working just fine and now I’m working on a RAK4200 implementation. I’m too impatient to wait for my RAK4XXX breakout boards to arrive to try things so …
I can see the recommendation that I use UART2 to talk to my MCU (Arduino Nano Every).
- To be completely sure, does this UART provide the AT interface like the RAK811 does?
UART1 is showing as reserved:
Is this the serial interface to update the main firmware?
Does this also provide an interface to update the boot loader should that be required?
Docs refer to this as a debug port as well, is this debug output from RUI & anything we code using RUI that references this port?