Been staring at the source for Ian Lee's standalone S-meter and SWR. See?
In uart_forward.cpp, at line 75 and 78 we have the definition of PINs for passthru of the Nextion protocol from the main processor:
#define TX_PIN 9
#define RX_PIN 8
However, if you look at his explanation at:?
In the illustration, he is clearly using RX pin (D!) for read from the main nano..Output is D9 as specified above.? The pre-compiled Hex files use RX/D1 and D9 so the diagram is correct.
Is this just a difference in the final selection of which pins to use and the source is just out of synch with the pre-generated HEX files? Or is there something more subtle that I am just missing. (I had thought that using RX on a nano was problematical because it is hardwired to the USB connection).
Thanks for any enlightenment you can share.?
73
Mark
AJ6CU
