According to https://www.olimex.com/wiki/A10s-OLinuXino-MICRO, UART2 (which is on the UEXT connector) is mapped to /dev/ttyS1. However, "busybox stty -a /dev/ttyS1" results in "stty: /dev/ttyS1: Input/output error" and "cat /dev/ttyS1" gives me "/dev/ttyS1: invalid length".
Also I get "stty: /dev/ttyS2: Input/output error" for ttyS2 which I believe is mapped to UART3.
Any suggestions?
That's probably true for Linux. Maybe not true for Android? (Remember Android is not Open Source.)
You may need a fex setting for what you want.
John