1.8 KiB
write Value
Write a name:value pair and a newline character (\r\n) to the serial port.
serial.writeValue("x", 0);
It is common when reporting or recording data to use a Name Value Pair (NVP). They appear as a text output string in the form of a name and a value together. The name and the value are separated in the string with a colon, :. A name value pair reporting a temperature of -15 degrees could look like:
temperature:-15
Associating a name with a value helps to identify related data when different data sources are recorded. For example, if you're reporting both temperature and light intensity, the name:value format helps spreadsheets or other data analysis programs distinguish between them and group the same types of values together properly. Reporting two data sources might look like this in the output:
temperature:-15
temperature:-12
light:154
temperature:-11
light:152
Parameters
Example: streaming data
Every 10 seconds, the example below sends the temperature and light level to the serial port.
basic.forever(() => {
serial.writeValue("temp", input.temperature())
serial.writeValue("light", input.lightLevel())
basic.pause(10000);
})
~hint
The send value function broadcasts
string/number pairs. You can use a second @boardname@ to receive them,
and then send them directly to the serial port with write value.