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

2. 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

3. 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:

4. Remote Sensing Technique
Traditional method of Remote Sensing.
Source:

5. IoT - Remote Sensing Technique
Source:

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

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

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

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

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

11. Question 2
Determine Vin_3.

12. Example Circuits: A Maker’s Perspective…
Humidity Detection circuit
Source:
Humidity Sensor acts as variable capacitor

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

14. Hands-On Project:
Temperature-Humidity Monitoring Unit

15. 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

16. Hands-On Project… Source:

17. Hands-On Project… Source:

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

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

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

21. 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

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

23. Hands-On Project…
Project Build Complete

24. Hands-On Project… Temperature – Humidity Monitoring Unit Python Code
Source:

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

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

27. 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.

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

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

30. Hands-On Project…
Congratulations!