Exp Header UART for TTL is True Serial Console (very nice)

[MarkHaysHarris777]

hi Peterz,

Those RS232 modules are very interesting; actual 9pin shells ! (takes me back a few years)

The six uart(s) are as follows (of which you found five... ):

uart0: EXP pins pb8 & pb9 duplicated on euler bus pin(29) & pin(30)
uart1: wifi|bt pins pg6 & pg7
uart2: pi bus pins pb0 & pb1
uart3: euler bus pd0 & pd1
uart4: euler bus pd2 & pd3
S-uart wifi|bt pl2 & pl3

If you use the serial console, bluetooth, and wifi, then only three uart(s) are available to you for serial comm... uart2-4.

I use the wifi and bt module, so S-uart and uart1 are out... i usually use the serial console too... so that leaves me uart3 & uart4 on the euler bus, and uart2 on the pi bus.

marcushh777