Display Temperature Alert Using Atom Matrix Esp32 And Dht11

About the project

In this Tutorial we are going to display Temperature notification from the DHT11 sensor using the ATOM Matrix ESP32.

Project info

Difficulty: Easy

Platforms: ArduinoVisuinoM5Stack

Estimated time: 1 hour

License: GNU General Public License, version 3 or later (GPL3+)

Items used in this project

Hardware components

DHT11 Temperature & Humidity Sensor (3 pins) DHT11 Temperature & Humidity Sensor (3 pins) x 1
Jumper wires (generic) Jumper wires (generic) x 1
M5Stack ATOM Matrix ESP32 Development Kit M5Stack ATOM Matrix ESP32 Development Kit x 1

Software apps and online services

Visuino Visuino
Arduino IDE Arduino IDE

Story

If the temperature is between -10 & 15C a Blue LED will glow, if the temperature is between 15-28 a green LED will glow and if the temperature is between 28-35 a red LED will glow.

Step 1: What You Will Need

1 / 4

Step 2: The Circuit

  • Connect DHT11 sensor pin [VCC] to Atom Matrix pin [5V]
  • Connect DHT11 sensor pin [GND] to Atom Matrix pin [GND]
  • Connect DHT11 sensor pin [S] to Atom Matrix pin [G25]

Step 3: Start Visuino, and Select the Atom Matrix Board Type

1 / 2

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 "Atom Matrix" as shown on Picture 2

Step 4: In Visuino Add Components

1 / 4

  • Add "DHT11" sensor component
  • Add "Analog Multi Source" component
  • Add 3X "Compare Analog Range" component
  • Add "Color Value" component
  • Add "Color Multi Source" component

Step 5: In Visuino Set Components

1 / 10

  • Select "M5 Stack ATOM Matrix" board and in the properties window expand "Modules">"RGB Matrix">"Elements" and click on the 3 dots button
  • In the "Elements" window drag "Fill Screen" to the left side and in the properties window select "Color" and click on the Pin Icon and select "Alpha Color SinkPin"
  • Close the "Elements" window

Double click on the "ColorValue1" and in the Elements window:

  • Drag "Set Value" to the left side and in the properties window set "Color" to clBlue
  • Drag another "Set Value" to the left side and in the properties window set "Color" to clGreen
  • Drag another "Set Value" to the left side and in the properties window set "Color" to clRed
  • Close the Elements window
  • Select "AnalogMultiSource1" and in the properties window set "Output Pins" to 3
  • Select "CompareRange1" and in the properties window set "Range" Max to 15 and Min to -10
  • Select "CompareRange2" and in the properties window set "Range" Max to 28 and Min to 15
  • Select "CompareRange3" and in the properties window set "Range" Max to 35 and Min to 28

Step 6: In Visuino Connect Components

1 / 2

  • Connect "HumidityThermometer1" pin [Sensor] to "M5 Stack ATOM Matrix" pin [GPIO 25]
  • Connect "HumidityThermometer1" pin [Temperature] to "AnalogMultiSource1" Pin [In]
  • Connect "AnalogMultiSource1" pin [0] to "CompareRange1" Pin [In]
  • Connect "AnalogMultiSource1" pin [1] to "CompareRange2" Pin [In]
  • Connect "AnalogMultiSource1" pin [2] to "CompareRange3" Pin [In]
  • Connect "CompareRange1" pin [Out] to "ColorValue1" > "Set Value1" Pin [In]
  • Connect "CompareRange2" pin [Out] to "ColorValue1" > "Set Value2" Pin [In]
  • Connect "CompareRange3" pin [Out] to "ColorValue1" > "Set Value3" Pin [In]
  • Connect "ColorValue1" pin [Out] to "ColorMultiSource1" Pin [In]
  • Connect "ColorMultiSource1" pin [0] to to "M5 Stack ATOM Matrix" > "Fill Screen1" pin [Color]
  • Connect "ColorMultiSource1" pin [1] to to "M5 Stack ATOM Matrix" > "Fill Screen1" pin [Clock]

Step 7: 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.

Step 8: Play

If you power the ATOM Matrix module The Display will start to show the Temperature as the Green color, Blue color or the Red color. If the temperature is between -10 & 15C a Blue LED will glow, if the temperature is between 15-28 a green LED will glow and if the temperature is between 28-35 a red LED will glow.

Congratulations! You have completed your project with Visuino. Also attached is the Visuino project, that I created for this tutorial, you can download it and open it in Visuino: https://www.visuino.eu

Schematics, diagrams and documents

Visuino File

Code

Visuino File

Credits

Photo of Ron

Ron

Arduino Developer

   

Leave your feedback...