Prototyping Home Automation Concepts Class 3: Home Temperature and Humidity Monitoring December 14, 2016 - Don Wilcher

Home Temperature and Humidity Monitoring Topics IoT and Remote Sensing Techniques for Temperature and Humidity Monitoring Remote Sensing Definition Remote Sensing Technique Example IoT-Remote Sensing Temperature and Humidity Monitoring Example Circuits: A Maker’s Perspective Hands-On Project: Home Temperature and Humidity Monitoring

IoT and Remote Sensing Techniques for Temperature and Humidity Monitoring Remote sensing is the acquisition of information about an object or phenomenon without making physical contact with the object and thus in contrast to on-site observation Source: https://en.wikipedia.org/wiki/Remote_sensing

Remote Sensing Technique Traditional method of Remote Sensing. Source: http://www.oneonta.edu/faculty/baumanpr/geosat2/RS-Introduction/RS-Introduction.html

IoT - Remote Sensing Technique Source: http://sjj.azurewebsites.net/?page_id=2171

IoT- Remote Sensing Temperature and Humidity Monitoring IoT- Remote Temperature and Humidity Monitoring.

Question 1 Name a free cloud service that Makers can use with the IoT- Remote Temperature and Humidity Monitoring system presented in slide 6.

Example Circuits: A Maker’s Perspective… Temperature Detection circuit The circuit can be used for a High/Low temperature monitoring and detection.

Temperature Detection Circuit: A Maker’s Perspective (NTC) Thermistor Basics . Negative Temperature Coefficient (NTC) Thermistor Curve .

Example Circuits: A Maker’s Perspective… Temperature Detection circuit: Circuit Analysis Vin_3 = VCC x R3/(R3 + NTC1)

Question 2 Determine Vin_3.

Example Circuits: A Maker’s Perspective… Humidity Detection circuit Source: http://www.next.gr/circuits/interfacing-humidity-sensor-89C51-89C52-89S51-89s52-microcontrollers-l33370.html Humidity Sensor acts as variable capacitor

Question 3 The humidity sensor acts like: a buffer a variable resistor a variable capacitor None of the above

Hands-On Project: Temperature-Humidity Monitoring Unit

Hands-On Project Temperature-Humidity Monitoring Unit Project Objectives: Learn about the GrovePi+ Shield Architecture Review of electrical connectors and ports Build a Temperature-Humidity Monitoring Unit

Hands-On Project… Source: https://www.dexterindustries.com/GrovePi/engineering/port-description/

Hands-On Project… Source: https://www.dexterindustries.com/GrovePi/engineering/port-description/

Question 4 What device for the Temperature-Humidity Monitoring Unit is attached to the IC2 port on the GrovePi+ shield?

Hands-On Project… GrovePi+ Shield: Electrical Connectors Circuit Schematic Diagram

Temperature –Humidity Monitoring Unit Block Diagram Hands-On Project… Temperature –Humidity Monitoring Unit Block Diagram

Temperature-Humidity Monitoring Unit Parts: Hands-On Project: Temperature-Humidity Monitoring Unit Parts: GrovePi+ Board & Raspberry Pi RGB LCD and 4 Conductor Jumper wire Temperature – Humidity Sensor and 4 Conductor Jumper wire

Temperature-Humidity Wiring Diagram Hands-On Project… Temperature-Humidity Wiring Diagram

Hands-On Project… Project Build Complete

Hands-On Project… Temperature – Humidity Monitoring Unit Python Code Source: http://www.rapidtables.com/web/color/RGB_Color.htm

Hands-On Project… https://github.com/DexterInd/GrovePi Temperature-Humidity Monitoring Unit can be obtained from Dexter Industries github site: https://github.com/DexterInd/GrovePi

Question 5 In the Home_Weather_Display.py code, what python instruction is used LCD color?

Hands-On Project… Open LXTerminal on the Raspberry Pi desktop and type the following directory and file commands to run the Python Home_Weather_Display code.

Hands-On Project… Python Home_Weather_Display code displaying temperature and humidity data on the RGB LCD.

Hands-On Project… Python Home_Weather_Display code displaying temperature and humidity data on a smartphone.

Hands-On Project… Congratulations!