"Introduction to Sensors and Actuators"
M. Anjanappa et al.
in Mechatronic Systems, Sensors, and Actuators, Robert Bishop ed.
http://www.kelm.ftn.uns.ac.rs/literatura/mur/IntroductionToSensorsAndActuators.pdf
Arduino Tutorial: Analog Read Serial
https://www.arduino.cc/en/Tutorial/AnalogReadSerial
Arduino Tutorial: Analog Input
https://www.arduino.cc/en/Tutorial/AnalogInput
Seeing the Light: Using Photoresistors (LDRs) with an Arduino
Karl von Dyson
https://blog.udemy.com/arduino-ldr/
DHT11 Datasheet
D-Robotics
http://www.micropik.com/PDF/dht11.pdf
Grove DHT11 Temperature and Humidity Sensor Info
seed
https://seeeddoc.github.io/Grove-Temperature_and_Humidity_Sensor/
Using a DHTxx Sensor
Adafruit
https://learn.adafruit.com/dht/using-a-dhtxx-sensor
Arduino Library for DHT11/22
Adafruit
https://github.com/adafruit/DHT-sensor-library
Grove Gas Sensor MQ2
seeed
http://wiki.seeed.cc/Grove-Gas_Sensor-MQ2/
How to Choose a Gas Sensor
seeed
http://wiki.seeedstudio.com/wiki/How_to_Chose_A_Gas_Sensor
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