4/23/2024 0 Comments Use arduino as pc temp monitorThe accesskey and bucketkey are from your Initial State account. For ssid put your WiFi name and for password put your WiFi password. These are the settings you need to change. If you are using a different GPIO from 4 you can change that here. This section includes the DHT library, defines which pin to read data from, and sets the type of DHT sensor. I’ll walk through the different sections, what can be changed and what you need to know. The link below contains the full code for this project. Search for DHT Sensor Library, HTTPClient, and Adafruit Unified Sensor and install all three libraries. Open the Arduino IDE, go to Sketch > Include Library > Manage Libraries. You’ll need to install three Arduino libraries to use the sensor and send data to an IoT dashboard. Connect this to one of the GPIO pins on the ESP32 (I used 4, GPIO32). The remaining pin on the DHT22 is the data pin and will be labeled ‘out’ or ‘s’ or ‘data’. The Gnd pin will be labeled ‘-’ or ‘Gnd’. There should be a pin label for power on the DHT22 (e.g. The DHT22 has three pins - 5V, Gnd, and data. It will allow for data to be sent to your account. Once your account is set up, go to your settings to find your Initial State Access Key. Go to and create a new account or log into your existing account. This will keep a historical log and allow you to view the real-time data. We are going to use Initial State to send data from the ESP32. In Arduino IDE go to Tools > Port and select “/dev/cu.SLAB_USBtoART” Download the driver, install it on your computer, and give it the necessary permissions to run. If you’re using a Mac, you may need to install the Silicon Labs USB to UART Bridge VCP Driver to get the ESP32 to connect to your computer. Next, go to Tools > Board > Board Manager…Search ESP32 and click install. Go to Arduino > Preferences > Additional Boards Manager URL and enter the following in the box: Once it is installed open it up and begin the process of adding your ESP32 board. You can start by downloading the Arduino IDE software to your computer. You’ll need to connect your ESP32 to your computer and run Arduino IDE to program it. It is simple to wire up and doesn’t require any pull up resistors. This temperature and humidity sensor has a temperature accuracy of +/- 0.5 C and a humidity range from 0 to 100 percent. We have previously posted the comprehensive guide on streaming temperature with a Raspberry Pi and we received multiple requests for a similar tutorial using the ESP32. The ESP32 combined with a DHT22 sensor will send temperature data to a data visualization tool. In this post, I will walk through how to build a ESP32 temperature sensor system. There are lots of solutions out there ranging from basic to complex and it can seem overwhelming finding what your business needs and where to start. Monitoring data for server rooms, commercial freezers, and production lines is necessary to keep things running smoothly. Temperature and environmental data is important in today’s industrial world. DHT22 Temperature, Humidity, and Pressure Sensor.This article will walk through how to monitor temperature with an ESP32 and DHT22 sensor using Arduino IDE and Initial State.
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