Introduction: Arduino Ethernet DHT11 Temperature and Humidity Logging, Mobile Stats

About: Growing Flowers, Building Weather Stations, Logging, with all popular boards

With Arduino UNO R3, Ethernet Shield AND DHT11 you can log temperature
and humidity data outside, in room, greenhouse, lab, cooling room or any other places completely free. This example we will use to log room temperature and humidity. Device will be connected to internet via Ethernet ADSL Router. You will be able to check latest readings on your mobile phone, desktop or any other device with browser.


You can purchase needed devices here (minimal required):

Arduino UNO R3

Ethernet Shield for Arduino UNO

DHT11 module

Ethernet Cable

Also nice to have:

Jumper wires

Experimental Platform for Arduino

Waterproof enclosure

Jack switch for power

USB charger to Power your device

This also tested/works with DHT22 or industrial AM2305 sensor

Step 1: Add Your Device to LoggingPlatform

Here you can add your device to get api keys needed later:

Step 2: Hardware Connection

Connect Shield to Arduino

Connect USB to PC

Connect DHT11 Out to Ethernet shield PIN 3

Connect DHT11 + to Ethernet shield 3V

Connect DHT11 – to Ethernet shield GND

Diagram example on picture

Step 3: Upload Software Needed to Device (Windows Guide)

Download and install Arduino IDE:

Connect device to USB on your Windows PC, and install drivers if needed Run Arduino IDE

Select COM port (this is usually larger number if you don’t have other devices connected), image 1

Select Board type, image 2

Download and open source code with Arduino IDE

Change this parameters from loggingforest platform: , image 3

Step 4: Check Data on Mobile or Desktop

After that your device will start sending data to loggingforest and you can see it there
In loggingforest device edit just define parameters name and values as image 1

Click on preview, image 2

And you will see nice data, image 3

Feel free to comment and share your logger