# serial.read_text

## Function

Read data from the open serial port and convert it to a string strictly according to UTF-8.

## Syntax

```bt
device.open(config).read_text()
```

## Parameters

No parameters.

## Return value

| Type | Description |
|------|------|
| String/Null | Legal UTF-8 returns String; illegal UTF-8 returns `null`. |

## Code Example

```bt
port = device.open({type: 'serial', port: 'COM3'})
text = port.read_text()

// Output: String
print type(text)
```

## Notes

- `read_text()` does not use lossy conversion; please use `read_bytes()` for industrial protocol messages.