This document describes creating a standalone thermometer using an LM35 sensor and an I2C LCD with an Arduino. It explains how to connect the I2C LCD and includes a code sketch for displaying real-time temperature readings on the display. Additionally, it mentions alerting users when the temperature goes outside a specified range.

1. Arduino Project – Standalone Thermometer with LM35
and an I2C LCD
Sometimes you come up with an idea where you want to
display the temperature readings in real time and show an
alert when the temperature is outside the specified range.
Then you’ll probably need a 16×2 character LCD instead of
a serial monitor.

2. • In this example, we’ll hook the I2C LCD up to the Arduino along with the LM35.
• Connecting the I2C LCD is quite easy as you can see in the wiring diagram
below.

3. The following sketch will print the temperature values on the I2C LCD. The code is similar to the
previous example, except that the values are printed on the I2C LCD.

5. You should see the following output on the LCD: