Introduction

Hello everyone, I am Morgan, the principal engineer of Nuvoton Technology. Today, I will show you how to control the temperature and humidity sensor with Mbed OS on NuMaker-IoT-M487 development board. For this tutorial, we choose the “Thermo 6 Click” board. It is a mikroBUS board with a MAX31875 sensor. It is easy to install on NuMaker-IoT-M487 board because it has a mikroBUS connector. The part of control code refer from community, it is easy and quick to be integrated into real application. Open Chrome browser, and enter the URL https://ide.mbed.com to use the Mbed Online Compiler. After log in, make sure that NuMaker-IoT-M487 board already selected in the upper right corner. If not, please refer Nuvoton IoT Tutorial series “Get Started with Mbed OS” which has a detailed description of how to add a board. Click the “New” on the left of menu bar, a “Create new program” window will be displayed. You can see that the Platform has been set to NuMaker-IoT-M487. In the Template, select the "NuMaker Thermo-Sensor MAX31875 " for this tutorial. Then click OK. Now you can see that the sample code has loaded on the page. The sample code includes the MAX31875 control from community, declares an I2C object used on NuMaker-IoT-M487’s mikroBUS and a sensor object with the I2C object. Get the temperature value then print it. No modification needed, just click “Compile” to build the sample code. It is in compiling, please wait a moment. Then you can see the last message is “Success!” after compile completed. The browser downloads the binary firmware file directly after a successful compiling. It will be saved in a default download folder or the folder based on your browser setting. In Chrome, you can click download file and select “Show in folder”. Now is the time to install the Thermo 6 Click temperature and humidity sensor board on the mikroBUS, please pay attention to the correct orientation of the board. Then we connect the NuMaker-IoT-M487 USB port to your computer and make sure the onboard LED lights up. Let’s back to the folder you just download the binary firmware file (NuMaker-mbed-Sensor-MAX31875.NUMAKER_IOT_M487.bin). Drag and drop the file to NuMicro MCU drive. You will see the copying progress dialog box. Please find the virtual COM port assigned for NuMaker-IoT-M487 in Device Manager. In the tutorial, the “Nu-Link Virtual Com Port” is COMx. Then use your favorite terminal tool. Here we use Putty. Open the COMx port with 115200 baud rate And no flow control settings. Then “Open” it. You can see the current temperature in Celsius and Fahrenheit printed on terminal. That’s all for this tutorial. Thank you for watching. Welcome to subscribe to our channel. If you want to get more information, please contact us at SalesSupport@nuvoton.com - For more information, please visit: https://bit.ly/3hVdcmC Buy now: https://direct.nuvoton.com/tw/numaker-iot-m487 Contact us: SalesSupport@nuvoton.com #tool #training #learning #intermediate #en

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