# Sonar:bit(F04089)

## Introduction

Sonar:bit is a 3-wire ultrasonic module with the working voltage between 3-5V. It is available to be used to 3.3V or 5V micro-controller system. With only one 3-wire(GVS) cable, it can work properly. Compared to the normal 4-wire ultrasonic module, it has saved one IO port. The measurement range of sonar:bit is 4cm-400cm. It can output stable and accurate measurement data with ±1cm tolerance only. It's available for short distance measuring in robtics device, micro:bit and Arduino etc.

![](./images/04089_01.png)

## Products Link

[ELECFREAKS Octopus Sonar:bit)](https://shop.elecfreaks.com/products/elecfreaks-octopus-sonar-bit?_pos=1&_sid=1da9648e9&_ss=r)

## Characteristics 

 The input voltage is 3V~5V, both micro:bit and Arduino are able to drive it.

 Standard 3-GVS cable, occupy one IO port only. 

## Specification


|Item| Parameter |
| :-: | :-: |
|Name| Sonar:bit|
|SKU|EF04089|
|Input Voltage|DC 3-5V|
|Measurement Distance|4-400cm|
|Tolerance|1cm|
|Size |40.60× 51.60mm|
|Net Weight|12g|


## Outlook and dimensions




![](./images/04089_03.png)


## Pins diagram 

![](./images/7E5ECzN.jpg)

The probes send out and receive ultrasonic signals. 

## Main parts information

### Emitting probes

![](./images/T1xDsne.jpg)

The emmiting probes send out ultrasonic signals. 

### Receving probes

![](./images/JxNrz8Q.jpg)

The receiving probes receive ultrasonic signals. 

### Chips MCU

![](./images/2CjnvfP.jpg)

Core controlling chips

### Emitting signals driving chips

![](./images/iOW0IN3.jpg)

The transmitting signal driving chip is used to provide the transmitting ultrasonic signal for driving the ultrasonic transmitting probe.

### Receiving signals driving chips

![](./images/VxEZ5KQ.jpg)

The receiving signal processing chip is used for receiving and processing the ultrasonic echo signal, and feeding back the processed signal to the main control chip.

### G-V-S controlling port 

![](./images/N9yc6Jm.jpg)

G-V-S are used for the controlling of the sonar:bit by other devices. 

## Quick start


### Materails required and connections diagram

 Connect the sonar:bit to the P1 port of the iot:bit and the micro:bit to the computer. 

***Take iot:bit for an example***



![](./images/04089_04.png)


### Step 1
 Click “Advanced“ in the MakeCode drawer and click “Extentions“ to see more choices. 


![](./images/04089_05.png)


We need to add a package for programming, . Click “Extensions” in the bottom of the drawer and search with “https://github.com/elecfreaks/pxt-sonarbit” in the dialogue box to download it.

![](./images/04089_06.png)


Note: If you met a tip indicating that the codebase will be deleted due to incompatibility, you may continue as the tips say or build a new project in the menu.

### Step 2
In forever block, show the returned value from Sonar:bit in digit. 


![](./images/04089_07.png)




### Reference
Link: [https://makecode.microbit.org/_eyU2yC79fXyc](https://makecode.microbit.org/_eyU2yC79fXyc)

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:_eyU2yC79fXyc" frameborder="0" sandbox="allow-popups allow-forms allow-scripts allow-same-origin"></iframe></div>  


### Result

 The distance between the ultrasonic module and the object is displayed on the micro:bit with unit in cm.

## Relevant Projects


## Technical File