pxt-calliope/docs/reference/serial/write-value.md

# Write Value

Write a name/value pair and a newline character (`\r\n`) to the [serial](/device/serial) port.

```sig
serial.writeValue("x", 0);
```

### Example: streaming data

Every 10 seconds, the example below sends the temperature and light level
to the serial port.

```blocks
basic.forever(() => {
    serial.writeValue("temp", input.temperature())
    serial.writeValue("light", input.lightLevel())
    basic.pause(10000);
})
```

#### ~hint

The [send value](/reference/radio/send-value) function broadcasts
string/number pairs.  You can use a second micro:bit to receive them,
and then send them directly to the serial port with ``write value``.

#### ~

### See also

[serial](/device/serial),
[serial write line](/reference/serial/write-line),
[serial write number](/reference/serial/write-number),
[send value](/reference/radio/send-value)