1602 16×2 Blue Character LCD Display For Arduino is a basic 16 character by 2 lines Alphanumeric display. This LCD 16×2 Character LCD Display has White text on a blue background. Utilizes the extremely common HD44780 parallel interface chipset. Interface code is freely available. You will need Minimum 6 general I/O pins to interface to this LCD screen. Includes LED backlight. Works in 4bit and 8 bit Mode.

This module consists of a DHT11 digital humidity and temperature sensor and a 1 kΩ resistor.  The DHT11 uses an internal thermistor and a capacitive humidity sensor to determine environmental conditions, an internal chip is responsible for converting readings to a serial digital signal.

The Digital Light Dependent Resistor LDR Sensor Module is used to detect the presence of light / measuring the intensity of light. The output of the LDR module goes high in the presence of light and it becomes low in the absence of light. You can adjust the threshold (sensitivity) of the digital output by tuning the onboard variable resistor (potentiometer). Simple usage as it is the digital output, so you will know is the light present and decide what to do with it.LDR photoresistor sensor module comes with an M3 mounting hole for ease of attaching it to an object. Onboard, it provides an LDR, high sensitivity and commonly being used for light detection.