37. 18B20 Temperature Sensor(EF05041)

37.1. Introduction

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


37.2. Characteristic

  • Designed in RJ11 connections, easy to plug.

37.3. Specification

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

37.4. Outlook


37.5. Quick to Start

37.5.1. 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.


37.6. MakeCode Programming

37.6.1. Step 1

Click “Advanced” in the MakeCode drawer to see more choices.


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.


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.

37.6.2. Step 2

37.6.3. Code as below:


37.6.5. Result

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

37.7. Relevant File

37.8. Technique File