Intelligent Computing Circuits and Systems Intelligent Weather Station

Intelligent Computing Circuits and Systems Intelligent Weather Station Na Gong and Ann Vallie June 15, 2017

Lesson Plan • Goal: In this lesson, we will design an intelligent weather station which can show real-time temperature and humidity, as well as display.

Lesson Plan • General Lesson Plan: 1) Introduce the importance of sensing temperature/humidity; (~10 mins) 2) Introduce the raspberry board and different sensors (~20 mins); 3) Introduce how to program to measure the temperature/humidity, principle, and teach the coding; (~30 mins); 4) Continue to split to several hands-on activities and give each group of students one by on (which will be detailed in the following slides) (~1. 5 hrs); 5) Test their developed system in different conditions, such as human body, fan, ice… (~20 mins); 6) Raspberry board is very powerful – possibility to extend the weather station and research project demonstration (5 -10 mins)

Introduction - Importance of temp/humidity monitoring • Operating rooms (sensitive instruments) • Greenhouse • Swimming pool (alga grow turn water green) May use images/videos to relate to the kids

Introduction - Importance of Embedded System § An embedded system is combination of computer hardware and software, that is specifically designed for a particular function May use images/videos to relate to the kids Video: Embedded Systems: https: //www. youtube. com/wat ch? v=QSIPNh. Oi. Mo. E

Introduce our device - Raspberry Pi ~20 mins • One of the most popular and powerful embedded programming platform. • Support many different embedded programing languages. • Many accessories and sensors on the market. • Easy to use

Temperature/humidity Sensor, principle, and coding (~30 mins) The Sense HAT temperature sensors can measure temperatures from as low as -40 degrees Celsius up to +120 degrees Celsius Discuss the principle of temperature sensor Provided code to get in the input from temperature sensor Explain how it works Run the code and check the results from sense_hat import Sense. Hat sense = Sense. Hat() sense. clear() temp = sense. get_temperature() print(temp)

Hands-On Activities Descriptions – ~1. 5 hrs • 4 hands-on activities are designed. They show the embedded programing step by step. • Hardware boards required for each group (<=3 students in each group): – Raspberry Pi 3 – Raspberry Pi Sense HAT

Activity 1: Convert Temperature to Fahrenheit • The temperature in the provided code is in Celsius. The students need to convert it into Fahrenheit. • Check the results and test from sense_hat import Sense. Hat sense = Sense. Hat() sense. clear() temp = sense. get_temperature() temp = temp * 9 / 5 + 32 print(temp)

Activity 2: Monitor the temperature • Based on Activity 1, try to use a while loop to monitor the temperature in real time. • Teach loop programming from sense_hat import Sense. Hat sense = Sense. Hat() sense. clear() while True: temp = sense. get_temperature() temp = round(temp, 1) print(temp)

Activity 3: Display on LED • Based on Activity 2, try to use LED array to display the temperature. • Principle of LED • Test the results

Activity 4: Monitor Humidity Based on Activity 2 and 3, please program to monitor the temperature. Will introduce the principle of humidity sensor first Then the students will work on the programming and run the code Test the results

Embedded Programming is Powerful … 1. Extension of weather station 2. Research project demo ~5 -10 mins camera Display

Outcome By creating a simple Weather Station with Raspberry Pi, students will learn: 1. the importance of embedded system 2. programming 3. data collection 4. detect inputs from sensors 5. how to process data received from sensors into a meaningful form 6. display