(TECH) Is there a second serial port on Rephone?

Dear all:
I’m trying to manage two devices with UART from the rephone; I’ve seen some rephone arduino examples using Serial1; (LMOTOR i.e.) so my question is, can we use two sets of Rx / Tx ports; if so, what pins from the breakout can we use for the additional ports?

Best regards,

Hi, Serial1 is a hardware uart port, the mapping pin is D8 and D9 in Arduino IDE.

Dear jinyuan.weng
Thank you very much; i’ll look into it and post my results.
Best regards!