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

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# Write Value
Write a name/value pair and a newline character (`\r\n`) to the [serial](/device/serial) port.
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```sig
serial.writeValue("x", 0);
```
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### Parameters
* `name` is the [string](/reference/types/string) to write to the serial port
* `value` is the [number](/reference/types/number) to write to the serial port
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### Example: streaming data
Every 10 seconds, the example below sends the temperature and light level
to the serial port.
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```blocks
basic.forever(() => {
serial.writeValue("temp", input.temperature())
serial.writeValue("light", input.lightLevel())
basic.pause(10000);
})
```
#### ~hint
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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``.
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#### ~
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### 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)