pxt-calliope/docs/reference/input/temperature.md
2016-05-24 18:27:14 -07:00

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# Temperature
Find the temperature where you are. The temperature is measured in Celsius (metric).
The micro:bit can find the temperature nearby by checking how hot its computer chips are.
```sig
input.temperature();
```
### Returns
* a [Number](/reference/types/number) that means the Celsius temperature.
### How does it work?
The BBC micro:bit checks how hot its CPU (main computer chip) is.
Because the micro:bit does not usually get very hot, the temperature of the CPU
is usually close to the temperature of wherever you are.
The micro:bit might warm up a little if you make it work hard, though!
### Example: micro:bit thermometer
The following example uses `temperature` and `show number` to show the temperature of the room.
```blocks
basic.forever(() => {
let temp = input.temperature()
basic.showNumber(temp)
})
```
### Example: Fahrenheit thermometer
This program measures the temperature using Fahrenheit degrees.
Fahrenheit is a way of measuring temperature that is commonly used in the United States.
To make a Celsius temperature into a Fahrenheit one, multiply the Celsius temperature by
1.8 and add 32.
```blocks
basic.forever(() => {
let c = input.temperature()
let f = (c * 1.8) + 32
basic.showNumber(f)
})
```
### ~hint
Try comparing the temperature your micro:bit shows to a real thermometer in the same place.
You might be able to figure out how much to subtract from the number the micro:bit
shows to get the real temperature. Then you can change your program so the micro:bit is a
better thermometer.
### ~
### Lessons
### See also
[compass-heading](/reference/input/compass-heading), [acceleration](/reference/input/acceleration)