# Case 14: Remote Control with Joystick:bit

## Purpose
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- Programme to control the TPBot with the Joystick:bit.

## Material
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- 1 x [TPBot](https://shop.elecfreaks.com/products/elecfreaks-micro-bit-tpbot-car-kit-without-micro-bit-board?_pos=1&_sid=f32828112&_ss=r)

![](./images/TPBot_tianpeng_case_01_01.png)

## Software
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[MicroSoftmakecode](https://makecode.microbit.org/#)


## Programming
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- Click "Advanced" to see more choices in the MakeCode drawer. 

![](./images/TPBot_tianpeng_case_01_02.png)

- We need to add a package for programming. Click "Extensions" in the bottom of the drawer and search with "tpbot" in the dialogue box to download it.  

![](./images/TPBot_tianpeng_case_01_03.png)

- We need to add a package for programming the Joystick also. Click "Extensions" in the bottom of the drawer and seach with "joystick" in the dialogue box to download it.  

![](./images/TPBot_tianpeng_case_14_03.png)

### Sample

### Remote Control Part

- Set the radio group as 1. 
- Judge the value of x&y of the Joystick in the forever brick, if the value of the x is below 200, radio send number 4;  if the value of the x is over 800, radio send number 3; if the value of the y is below 200, radio send number 2; if the value of the y over 800, radio send number 1; or radio send number 0. 


![](./images/TPBot_tianpeng_case_14_04.png)

### Link
- Link: [https://makecode.microbit.org/_7rzb5TEfrbu7](https://makecode.microbit.org/_7rzb5TEfrbu7)

- You may also download it directly below:

<div style="position:relative;height:0;padding-bottom:70%;overflow:hidden;"><iframe style="position:absolute;top:0;left:0;width:100%;height:100%;" src="https://makecode.microbit.org/#pub:_7rzb5TEfrbu7" frameborder="0" sandbox="allow-popups allow-forms allow-scripts allow-same-origin"></iframe></div>  

### Receiving Part

- Set the radio group as 1. 
- Save the received number as the variable in "on radio received..."block.
- Judge if the value is 1, if yes, set the TPBot moving forward at the speed of 100%; if it's 2, set the TPBot reversing at the speed of 50%; if it's 3, set the TPBot turning left at the speed of 50%;  if it's 4, set the TPBot turning right at the speed of 50%; If it's 0, set the TPBot to stop. 

![](./images/TPBot_tianpeng_case_14_05.png)

### Link
- Link: [https://makecode.microbit.org/_HPVCEx29zTPx](https://makecode.microbit.org/_HPVCEx29zTPx)

- You may also download it dorectly below:

<div style="position:relative;height:0;padding-bottom:70%;overflow:hidden;"><iframe style="position:absolute;top:0;left:0;width:100%;height:100%;" src="https://makecode.microbit.org/#pub:_HPVCEx29zTPx" frameborder="0" sandbox="allow-popups allow-forms allow-scripts allow-same-origin"></iframe></div>  

### Conclusion

- The movement of the TPBot is controlled via the Joystick:bit.

## Exploration
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## FAQ
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Q: The car does not work with the code in the wiki.     
A: It should be the batteries that are lack of power, please try to fix it by adding the value of the speed in the code. 


## Relevant File
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