> For the complete documentation index, see [llms.txt](https://sdk.twelite.info/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sdk.twelite.info/en/hw-api-ref/perifuraru/uart/fprintf-raiburari/vputchar.md).

# vPutChar()

## Explanation

Outputs 1 byte to the output destination (UART) indicated by the [`tsFILE`](/en/hw-api-ref/perifuraru/uart/fprintf-raiburari/tsfile.md) structure.

## Argumtens

| Type                                                                   | Name     | Remark        |
| ---------------------------------------------------------------------- | -------- | ------------- |
| [tsFILE](/en/hw-api-ref/perifuraru/uart/fprintf-raiburari/tsfile.md)\* | psStream | Output device |
| uint8                                                                  | u8Char   | Output byte   |

## Returns

None.

## Sample code

```c
#define IS_ASC(c) ((c) >= 0x20 && (c) <= 0x7e)

void cbToCoNet_vRxEvent(tsRxDataApp *pRx) {
	uint8 u8i;
	vfPrintf(&sSerStream, LB"RX(len=%d):[", pRx->u8Len);
	for (i = 0; i < pRx->u8Len; i++) {
		uint8 c = pRx->auData[i];
		vPutChar(&sSerStream, IS_ASC(c) ? c : '.');
	}
}
```