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Arduino Display Temperature & Humidity on MAX7219 8-digit LED Display Us
2026-05-01 | By Ron Cutts
License: GNU Lesser General Public License Displays Humidity Temperature Arduino ESP32
In this tutorial, we will learn how to display temperature and humidity using a MAX7219 8-digit digital LED display.
Watch the video!
Learn more about Visuino: What is Visuino
What You Will Need
Arduino UNO (or any other Arduino)
Max7219 Led Dot Matrix 8-digit Digital Display Control Module
Visuino program: Download Visuino
The Circuit
Connect DHT11 Sensor module pin[VCC] to Arduino pin[5V]
Connect DHT11 Sensor module pin[GND] to Arduino pin[GND]
Connect DHT11 Sensor Signal pin[S] to Arduino Digital pin[3]
Connect RTC DS1307 module pin[SCL] to Arduino pin[SCL]
Connect LED module pin[VCC] to Arduino pin[5V]
Connect LED module pin[GND] to Arduino pin[GND]
Connect LED module pin[DIN] to Arduino digital pin[11]
Connect LED module pin[CS] to Arduino digital pin[10]
Connect LED module pin[CLK] to Arduino digital pin[13]
Start Visuino, and Select the Arduino UNO Board Type
The Visuino: https://www.visuino.eu also needs to be installed. Download the free version or register for a free trial.
Start Visuino as shown in the first picture. Click on the "Tools" button on the Arduino component (Picture 1) in Visuino. When the dialog appears, select "Arduino UNO" as shown in Picture 2
In Visuino Add Components
Add "DHT11" component
Add "Formatted Text" component
Add "Maxim LED Display Controller SPI MAX7219/MAX7221" component
In Visuino Set Components
Double-click on the "FormattedText1" and in the "Elements window" drag 2X "Analog Element" to the left side
and for each in the Properties window, set the "Precision" to 0Close the "Elements window"
Select "FormattedText1" and in the properties window, set "Text" (don't forget to add space) to %0c %1 H
Double-click on the "LedController1" and in the "PixelGroups window" drag "Text Display 7 Segments" to the left side
Close the "PixelGroups window"
In Visuino Connect Components
Connect "HumidityThermometer1" pin [Sensor] to Arduino Digital pin [3]
Connect "HumidityThermometer1" pin [Temperature] to "FormattedText1 > AnalogElement1" Pin [In]
Connect "HumidityThermometer1" pin [Humidity] to "FormattedText1 > AnalogElement2" Pin [In]
Connect "FormattedText1" pin [Out] "LedController1 > Text Display 7 Segments1" Pin [In]
Connect "LedController1" pin Out SPI to Arduino Pin SPI In
Connect "LedController1" pin Chip Select to Arduino Digital Pin [10]
Generate, Compile, and Upload the Arduino Code
In Visuino, at the bottom, click on the "Build" tab, make sure the correct port is selected, then click on the "Compile/Build and Upload" button.
Play
If you power the Arduino module, the LED display will start to display the temperature and humidity.
Congratulations! You have completed your project with Visuino. Also attached is the Visuino project that I created for this. You can download it and open it in Visuino: https://www.visuino.eu
