The I2C LCDs that we are using in this tutorial come with a small add-on circuit mounted on the back of the module. This type of LCD is ideal for displaying text and numbers, hence the name character LCD. After activation, DHT11 sensor responds to starting a signal in the form of 40-bit data with relative humidity and temperature information. DHT11 transfers data from its single terminal to microcontroller, DHT11 sensor sends signals to an active microcontroller sensor. The DHT11 sensor can work from 3 voltage to 5.5 volts. 3-PIN sensors have two PINs (+ve and -ve) for power supply, one is a signal PIN used for data communication. The DHT11 sensor has three or four pins in total. ![]()
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