How to Save Sensor Data Temp & Time to SD Card Using Arduino

In this tutorial we are going to save Temperature and Humidity data from the Dht11 sensor to the SD card and we will also add a time and a date that we will get from the RTC module ds1307.

Watch the Video!

Step 1: What You Will Need

• Arduino UNO (or any other Arduino or ESP)
• SD Card module + SD card to store data
• DHT11 Temperature & Humidity sensor
• RTC DS1307 module
• Jumper wires
• Breadboard
• Visuino program: Download Visuino

Step 2: Brought by PCBWay

Thank you PCBWay for supporting this tutorial and helping users learn more about electronics.

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Step 3: The Circuit

Step 4: Start Visuino, and Select the Arduino UNO Board Type

The Visuino: https://www.visuino.com also needs to be installed. Download 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 on Picture 2

Step 5: In Visuino Add Components

 

• Add “Clock Generator” component
• Add “Date/Time Value” component
• Add “Real Time Clock DS1307” component
• Add “DHT11” component
• Add “Formatted Text” component
• Add “Micro SD Card Module” component

Step 6: In Visuino Set Components

 

 

• Select “DateTimeValue1” and in the properties window select “Value” and set your current Date & Time
• Select “ClockGenerator1” and in the properties window set “Frequency” to 0.1 this means that the Data will be stored every 10 s
• Double click on the “FormattedText1” and in the “Elements” window drag “Text Element” & 2X “Analog Element” to the left side.
• Close the “Elements Window“
• Select “FormattedText1” and in the “properties window select “Text” and type DateTime:%0 TEMP:%1 HUM:%2
• Double click on the “SDCard1” and in the “Elements” window drag “File” to the left side.and in the properties window select “Path Name” and type SENSDATA.txt
• Close the “Elements Window“

Step 7: In Visuino Connect Components

• Connect “DateTimeValue1” pin [Out] to “RealTimeClock1” pin [Set]
• Connect “HumidityThermometer1” pin [Temperature] to “FormattedText1 > AnalogElement1” pin [In]
• Connect “HumidityThermometer1” pin [Humidity] to “FormattedText1 > AnalogElement2” pin [In]
• Connect “RealTimeClock1” pin [Our] to “FormattedText1 > Text Element1″ pin [In]
• Connect “ClockGenerator1” pin [Our] to “FormattedText1” pin [Clock]
• Connect “RealTimeClock1” pin [I2C] to “Arduino” pin [I2C]
• Connect “HumidityThermometer1” pin [Sensor] to “Arduino” Digital pin [2]
• Connect “FormattedText1 ” pin [Out] to “SDCard1” pin [In]
• Connect “SDCard1” pin [SPI] to “Arduino” pin [SPI]
• Connect “SDCard1” pin [Chip Select] to “Arduino” Digital pin [10]

Step 8: 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 9: Play