DS18B20 temperature sensor with Android and Seeeduino XIAO

Introduction

In this project we will make a simple temperature gauge and read the data with an Android phone. We will use Arduino CLI, which is a powerful command line tool for Arduino development. Visit https://www.arduino.cc/pro/cli for instruction how to setup Arduino CLI.

Step 1: Start new sketch

arduino-cli sketch new temperature_demo
cd temperature_demo
sudo nano temperature_demo.ino

The "sketch new" command makes a new folder for the project, and inside the folder.ini file. Edit the temperature.ino file with your favorite code editor, I am using Linux Nano code editor. Save the work and exit back to the command line.

Step 2: Update the local cache of available platforms and libraries

arduino-cli core update-index

Expected result:

Step 3: List available boards

arduino-cli board list

Here we can see that I have two boards connected, Arduino Uno and Unknown board that is the Seeeduino XIAO. Next we need to install the core for the Seeeduino board.

Step 4: Install core for Seeeduino XIAO board

We need to use additional-urls flag because Seeeduino XIAO board is a 3rd party board. Check here for more details https://wiki.seeedstudio.com/Seeeduino-XIAO/

arduino-cli core install Seeeduino:samd --additional-urls https://files.seeedstudio.com/arduino/package_seeeduino_boards_index.json

Expected result:

Step 5: Install the needed Dallas Temperature library

Use this command to install DallasTemperature library.

arduino-cli lib install DallasTemperature

You should see something like this:

Step 6: Compile the software

Use following command to build the software. This will make folder called build to your project folder.

arduino-cli compile --fqbn Seeeduino:samd:seeed_XIAO_m0 temperature_demo

First check the board list and then compile the software:

Step 7: Upload the software to the Seeeduino XIAO board

arduino-cli upload -p /dev/ttyACM1 --fqbn Seeeduino:samd:seeed_XIAO_m0 temperature_demo

Expected result:

Step 8: Connect the board to Android mobile and read the data

Download the Serial USB Terminal app from Play store. https://play.google.com/store/apps/details?id=de.kai_morich.serial_usb_terminal&hl=fi&gl=US

Connect the board to the Android mobile with USB C to USB adapter and read the temperature.