# charting lesson

measure the acceleration on the micro:bit in the "z" direction #acceleration #var #docs #if #show

## Topic

Acceleration

## Quick Links

* [activity](/microbit/lessons/charting/activity)

## Class

Year 7

## Prior learning/place of lesson in scheme of work

Learn the functions of **on data received**, **send number** and **receive number** and chart `plot bar graph` for `acceleration` in the "x" dimension.

## Documentation

```docs

basic.showNumber(0)

input.acceleration(Dimension.X)

led.plotBarGraph(0, 1023)

radio.onDataReceived(() => {


})

radio.sendNumber(0)

radio.receiveNumber()

```

## Objectives

* learn how to repeat code in the background forever
* learn how to get the acceleration value (g-force), in one of three specified dimensions
* learn how to display a vertical bar graph based on the value and high value.
* learn how to register code to run when a packet is received over radio
* learn how to broadcast a number data packet to other micro:bits connected via radio
* learn how to read the next radio packet as a number data packet