# 18B20 Temperature Sensor(EF05041) 

## Introduction

It is a digital tempeterature sensor based on 1Maxim IC DS18B20 1-Wire.

![](./images/05041_01.png)

## Products Link

[ELECFREAKS PlanetX 18B20 Temperature Sensor](https://www.elecfreaks.com/planetx-18b20-temperature-sensor.html)


## Characteristic


 Designed in RJ11 connections, easy to plug.

## Specification


Item | Parameter 
:-: | :-:  
SKU|EF05041
Connection|RJ11
Type of Connection|Digital output
Working Voltage|3.3V


## Outlook



![](./images/05041_02.png)

## Quick to Start



### Materials Required and Diagram

 Connect the 18B20 Temperature sensor to J1 port and the OLED to the IIC port in the Nezha expansion board as the picture shows.


![](./images/05041_03.png)



## MakeCode Programming


### Step 1

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

![](./images/05001_04.png)

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

![](./images/05001_05.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

### Code as below:

![](./images/05041_06.png)


### Link
Link: [https://makecode.microbit.org/_WdtFC03dq59y](https://makecode.microbit.org/_WdtFC03dq59y)

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:_WdtFC03dq59y" frameborder="0" sandbox="allow-popups allow-forms allow-scripts allow-same-origin"></iframe></div>  


### Result
 The value detected by 18B20 temperature sensor displays on the OLED screen.

## Relevant File


## Technique File