Zio Temperature and Humidity Sensor Qwiic Start Guide

Posted by Aswana, 08/01/2019

 

This post is part of our Zio Qwiic Start Guide Blog Series.


Introduction

 

This SHT31 sensor is very useful for projects that require measurements of temperature and humidity. Commonly found in applications like weather monitoring and Indoor Environment monitoring to detect room comfort levels relative to humidity and temperature. It is also useful in projects that manage health effects and illnesses. 

 

 

Zio Qwiic SHT31 Temperature & Humidity Overview

 

 

  1. I2C Power and Logic Pins

              

Pins

I/O Type

Description

SCL

Input/Output

Serial Clock Pin

SDA

Input/Output

Serial Data Pin

VDD

Supply

Supply Voltage Pin

GND

Supply

Ground Pin

RST

Input

Reset pin active low

ALERT

Output

Indicates alarm condition. Use as Alert or Interrupt pin

 

  1. Qwiic Connectors: System to easily connect to other qwiic compatible modules using Qwiic cables
  2.  SHT31 sensor: Measures the Ambient Temperature in degrees Celcius and the percentage of Relative Humidity
  3.  I2C Selectable Addresses at 0x44 (default) and 0x45
  4. I2C pull-up resistors

 

 

 

Configuring your Temperature and Humidity Sensor (SHT31)

 

 

Difficulty Level: 

 

Zio Youngling

 

 

Helpful Resources:

 

You should have a basic understanding of how to install Zio development boards. In this tutorial, we assume that your development board is already configured and is ready to be set up with our Temperature & Humidity Sensor. If you haven’t configured your board yet check out our development boards Qwiic Start Guide tutorial below:

 

 

Hardware:

 

 

Software:

 

 

1. Setting Up with Zuino M UNO

 

*For set up using XS PsyFi32 go here.

 

Step 1 Connect Zio development board with SHT31 Temperature & Humidity Sensor

 

Step 2 Install library

 

Download and install the Adafruit SHT31 library you have downloaded to your Arduino IDE.

 

Don’t know how to install libraries? This complete guide by Arduino explains how to install libraries to your Arduino IDE.

 

Step 3 Example Demo code

 

Open your Arduino IDE. 

 

Go to File > Examples > Adafruit SHST31 Library  > SHT31test 

 

 

Set your Tools Board to Arduino Uno/Genuino Uno and set your com port.

 

Upload and run your code to your board.

 

Open your Serial Monitor (make sure it is set at 9600 baud)  to check the readings. Your sensor will provide temperature readings (Celcius) and Relative Humidity (%).

 

 

2. Setting Up with Zuino PsyFi32


Step 1 Connect Zio development board with SHT31 Temperature & Humidity Sensor

 

Step 2 Install library

 

Download and install the Adafruit SHT31 library you have downloaded to your Arduino IDE.

 

Don’t know how to install libraries? This complete guide by Arduino explains how to install libraries to your Arduino IDE.

 

 

Step 3 Example Demo code

 

Open your Arduino IDE. 

 

Go to File > Examples > Adafruit SHST31 Library  > SHT31test 

 

 

Set your Tools Board to Esp32 Dev Module and set your com port.

 

Upload and run your code to your board.

 

Open your Serial Monitor (make sure it is set at 9600 baud)  to check the readings. Your sensor will provide temperature readings (Celcius) and Relative Humidity (%).

 

 


3. Setting up for OLED Display

 

This tutorial works with our Zuino development boards. Don’t forget to set the right board and com port of your device in the Arduino IDE Tools settings.

 

We will do a demo test using Zio Qwiic 0.91in OLED Display and display readings on SHT31 sensor for Temperature and Relative Humidity readings. For this example code, we will use Adafruit’s library. You should have installed the Adafruit libraries below:

 

 

We also have a separate blog post and qwiic start guide for our OLED display. You can check it out here.

 

Below is the code for testing our Temperature & Humidity Sensor with OLED showing Temperature (Celcius) and Relative Humidity (%)  basic readings. You can download the demo code here.

 

 

OLED demo with Zuino M Uno Development board

 

 

OLED demo with Zuino XS PsyFi32 Development board

 

Do check out our other Zio qwiic guide blog post here to give you that qwiic inspiration!

 

 

 

 

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