There is a UART port on the 30pin header.
CON10 - 2×15 pins
| Pin Number | Net Name | GPIO & Export No | Default Pin State |
|---|---|---|---|
| 6 | UART_0.RXD | GPA0.0 (#171) | I(PUDN) |
| 8 | UART_0.TXD | GPA0.1 (#172) | I(PUDN) |
Access device node
/dev/ttySAC0
I/O voltage range is 0~1.8Volt. Otherwise your ODROID will be damaged permanently.
Refer this link to learn how to use the UART interface. UART interface using the IO-Port #1