Wifi thermometer with LED matrix and graphs via 2MINLOG

Thermistor 10K

Resistor 2k ohm

Arduino® UNO R4 WiFi

2MINLOG

<html><body><h3>Mechanical assembly:</h3>-	Connect the thermistor to pins 5V and A0 -	Connect 2 kOhm resistor to pins A0 and GND <figure><img src="https://projects.arduinocontent.cc/874daa41-5651-44de-af17-af884c4a88be.jpg"/><figcaption></figcaption></figure><h3>Arduino coding.</h3>There are three areas – of the code: 1. Thermometer: -	Recalculate Arduino levels to temperature by a least square regression method 2. Wifi/networking: -	Connect to your WiFi network -	Establish http/https connection to the server -	Send data in URL 3. Onboard matric LED display -	Display the results on the matrix and scroll the text The Arduino code is <a href="https://github.com/2minlog/2minlog-examples/blob/main/10-wifi-arduino-thermometer/wifi_arduino_thermometer.ino">here </a>. <figure><img src="https://projects.arduinocontent.cc/2fbabc55-affa-4ea3-bd94-ffce49d89b00.jpg"/><figcaption></figcaption></figure><h3>Create and display the graph</h3>-	Login to the 2MINLOG system -	Setup the dataset (you will need to input the secret string to Arduino) -	Set up the graph -	Python code for the graph is <a href="https://github.com/2minlog/2minlog-examples/blob/main/10-wifi-arduino-thermometer/Arduino%20thermometer.py">here </a>. <figure><img src="https://projects.arduinocontent.cc/3b6c7356-fe55-463c-9a2c-e022cbd0f106.jpg"/><figcaption></figcaption></figure> You must calibrate the system, i.e., relate the voltage level to the temperature. Measure hot, cold, and ambient temperature with a reference thermometer. Adjust <code class="code">temperature[] </code>and <code class="code">levels[] </code>arrays in the Arduino code. Once done, you can display the graph as a home page or use, e.g., an <a href="https://doc.2minlog.com/tutorials/old-android-tablet/">old Android tablet </a>. (If you do not want to use the 2MINLOG platform, you can set up a local server. The code is <a href="https://github.com/2minlog/2minlog-examples/blob/main/01-local-server/server.py">here </a>.) Step-by-step instructions are <a href="https://doc.2minlog.com/tutorials/wifi-arduino-thermometer">here </a>. </body></html>

Wifi thermometer with LED matrix and graphs via 2MINLOG

This is a simple Wifi Arduino thermometer tutorial. We will measure temperature with a thermistor, display results on a matrix LED display, send the records to the 2MINLOG platform, and plot the awesome results.