Lesson 27 CPF Weather Station

Size: px

Start display at page:

Download "Lesson 27 CPF Weather Station"

Barry May
5 years ago
Views:

Lesson 27 CPF Weather Station 1 What you will need CloudProfessor (CPF) Moisture Sensor Water sensor Temp & humidity sensor Arduino Leonardo Android Shield USB lead Overview In this lesson, students

Learning Objectives Understand how weather predictions are made, and the importance of data collection. Know how to collect data received from sensors.

1 Lesson 27 CPF Weather Station 1 What you will need CloudProfessor (CPF) Moisture Sensor Water sensor Temp & humidity sensor Arduino Leonardo Android Shield USB lead Overview In this lesson, students will create a simple weather monitoring station using a water sensor, temp & humidity sensor and moisture sensor. Learning Objectives Understand how weather predictions are made, and the importance of data collection. Know how to collect data received from sensors. Interpret data retrieved from sensors and present the results in a meaningful way. Learning Expectations (how learning / progress will be demonstrated) All Explain how weather predictions are made and the importance of data collection. Most Collect data from the three sensors and upload the results to the cloud. Some Make predictions based on the data retrieved from the three sensors. Curriculum Links (Computing PoS) Understands that people interact with computers. Knows common uses of information technology beyond the classroom. (GE) Recognises that a range of digital devices can be considered a computer. (AB) (GE) Knows that computers collect data from various input devices, including sensors and application software. (AB) Computational Thinking Concepts: AB = Abstraction; DE = Decomposition; AL = Algorithmic Thinking; EV = Evaluation; GE = Generalisation. 1 Lesson 27: CPF Weather Station

Insert the Arduino Shield into Arduino Leonardo and use the USB cable to connect the CloudProfessor with Arduino Leonardo.

When the CloudProfessor detects the Arduino Leonardo, a notification will appear on your device; click the notification to launch the Arduino Leonardo APP,

2 2 Step-by-step instructions 1. Connect the power of CloudProfessor then press and hold the power button for two seconds; it will turn on and the power indicator will light up. 2. Insert the Arduino Shield into Arduino Leonardo and use the USB cable to connect the CloudProfessor with Arduino Leonardo. Attach the moisture sensor to port A2, the water sensor to port D6 and the temp & humidity sensor to port A0. 3. When the CloudProfessor detects the Arduino Leonardo, a notification will appear on your device; click the notification to launch the Arduino Leonardo APP, and select the CPF Arduino Blockly app. Click on Lesson Press the execute button to enter the control user interface (UI). The UI can be used to adjust the speed of the fan. 5. Press the edit button to enter the program editing page. Edit button Execute button CPF Arduino Blockly app Control user interface (UI) Program editing page 2 Lesson 27: CPF Weather Station

3 Code recap (Blockly) Let s explore some of the code used in the previous lessons. 1.

White LED Set The White LED Set block controls the attached White LED light. The led can be set to either ON or OFF. 3.

If / else: The if / else block is used to conditionally run code depending on whether a Boolean condition is true or false.

light will automatically turn off. 5. Title Name Panel Set: The Title Name Panel Set block displays a message on the screen.

3 3 Code recap (Blockly) Let s explore some of the code used in the previous lessons. 1. Light Get Value: The Light Get Value block returns the value of the light sensor (Returns a numeric value based on the brightness level of the environment). 2. White LED Set The White LED Set block controls the attached White LED light. The led can be set to either ON or OFF. 3. Servo Pin# D4: The Servo block allows the user to control the attached servo by specifying the angle (degrees) and delay (milliseconds). 4. If / else: The if / else block is used to conditionally run code depending on whether a Boolean condition is true or false. In this example, if the light sensor value is less than (<) 500, the RGB LED light will light up; or else (else), if the light sensor value is greater than or equal to 500, the RGB LED light will automatically turn off. 5. Title Name Panel Set: The Title Name Panel Set block displays a message on the screen. In this example it will display a Downloading message on the UI (User Interface). 6. Delay Time(Sec.): The Delay Time(Sec.) block is used to pause the code (time set in milliseconds). In the example above, the program is paused for 1000 milliseconds (1 second). 7. Set CPF control request: Finally, the Set CPF control request block at the end of the program tells the program to run the code from the beginning again. The program will continuously repeat until the user closes the app or stops the program manually. 3 Lesson 27: CPF Weather Station

3 Step-by-step instructions (Blockly) - Part 1 Let s write the code for our Weather Station app. 1. Clear the existing code so that you have a blank canvas to create your new program.

First, let s set the Title name. Click on CPF UI. Select the Title Name Panel Set block and drag it onto your code canvas. Set the title to CPF Weather Station. 4.

However, in this example, we only want to run our code 10 times each time taking a reading from each of the attached sensors and uploading the collected data to the cloud.

Let s start with the temperature sensor. a) Click on Variables. Drag the Set item to block and place it inside the count with statement. Rename the variable to temp.

4 3 Step-by-step instructions (Blockly) - Part 1 Let s write the code for our Weather Station app. 1. Clear the existing code so that you have a blank canvas to create your new program. Click on the bin icon (1). Click on OK (2) to create a blank canvas. 2. Note: You can return to the original program at any time by clicking on the restore icon (3) First, let s set the Title name. Click on CPF UI. Select the Title Name Panel Set block and drag it onto your code canvas. Set the title to CPF Weather Station. 4. In previous lessons, we used the cpf.repeat() command to repeat our code until manually stopped by the user. However, in this example, we only want to run our code 10 times each time taking a reading from each of the attached sensors and uploading the collected data to the cloud. To do this, we will use a count with loop. Click on Loops. Drag the Count with block and attach it to the Title Name block. 5. Next, let s take a reading from each of the attached sensors. Let s start with the temperature sensor. a) Click on Variables. Drag the Set item to block and place it inside the count with statement. Rename the variable to temp. b) Click on the Sensor Modules tab. Select Input Devices and Environment Sensors. Drag the DHT11 Pin A0 block and attach it to the set temp to block. Change the Data Type value to Temperature (4) Next, let s take a reading from the water sensor. a) Click on Variables. Drag the Set item to block and place it beneath the set temp to block. Rename the variable to water. b) Click on the Sensor Modules tab. Select Input Devices and Environment Sensors. Drag the Water Sensor Get Value block and attach it to the set water to block (5). 5 4 Lesson 27: CPF Weather Station

3 Step-by-step instructions (Blockly) - Part 2 7. Next, let s record the date and time that the sensor readings were taken. a) Click on Variables.

Drag the Date Get Date block and attach it to the set date to block (6). 8. Next, let s take the readings from each of our sensors and upload them to the cloud.

Drag the AOP Upload Data block and attach it to the set AOPstatus block (7). 7 c) Click on Variables. Drag the index block and attach it to the Record ID (8).

e) Replace Value1, Value2 and Value3, with the variables temp, water and date respectively (9). 8 9 9. Next, let s display the uploaded data on the user interface (UI).

5 3 Step-by-step instructions (Blockly) - Part 2 7. Next, let s record the date and time that the sensor readings were taken. a) Click on Variables. Drag the Set item to block and place it beneath the set water to block. Rename the variable to date. b) Click on the CPF tab and select Cloud Service. Drag the Date Get Date block and attach it to the set date to block (6). 8. Next, let s take the readings from each of our sensors and upload them to the cloud. a) Click on Variables. Drag the Set item to block and place it beneath the set date to block. Rename the variable to AOPstatus. 6 b) Click on the CPF tab and select Cloud Service. Drag the AOP Upload Data block and attach it to the set AOPstatus block (7). 7 c) Click on Variables. Drag the index block and attach it to the Record ID (8). d) Click on the CPF tab and select Cloud Service. Drag the AOP Upload Data Set block and attach it to JSON DATA. e) Replace Value1, Value2 and Value3, with the variables temp, water and date respectively (9) Next, let s display the uploaded data on the user interface (UI). a) Click on the CPF tab and select CPF UI. Drag the Title Panel Set tab and place it beneath the Set AOPstatus to block. b) Click on the Text tab. Drag the Create text with block and place it inside the Title Panel Set block (10). c) Click on the cog inside the Create text with block and add an extra item (11) Lesson 27: CPF Weather Station

g) Click on the Variables tab. Replace Value1, Value2 and Value3, with the variables temp, water and date respectively (14). 13 14 12 10. Finally, let s add a delay between each reading.

6 3 Step-by-step instructions (Blockly) - Part 2 d) Click on the Text tab. Drag an empty text block and attach it to the first item slot (12). e) Click on Text tab. Drag a text newline block and attach it to item slot 2 (13). f) Click on the CPF tab and select Cloud Service. Drag the AOP Upload Data Set block and attach it to item slot 3. g) Click on the Variables tab. Replace Value1, Value2 and Value3, with the variables temp, water and date respectively (14) Finally, let s add a delay between each reading. Click on the CPF tab and select Cloud Service. Drag the Delay Time(ms) block and attach it to the end of your code. 11. Run your code. Your finished code should look like this. Change the number of readings taken by changing the number of times the code is repeated. Change the interval (time) between each reading Delay Time(ms). 6 Lesson 27: CPF Weather Station

When the CloudProfessor detects the Arduino Leonardo, a notification will appear on your device; click the notification to launch the Arduino

7 2 Setup instructions (JavaScript) 1. Connect the power of CloudProfessor then press and hold the power button for two seconds; it will turn on and the power indicator will light up. 2. Insert the Arduino Shield into Arduino Leonardo and use the USB cable to connect the CloudProfessor with Arduino Leonardo. Attach the moisture sensor to port A2, the water sensor to port D6 and the temp & humidity sensor to port A0. 3. When the CloudProfessor detects the Arduino Leonardo, a notification will appear on your device; click the notification to launch the Arduino Leonardo APP, and select the CPF Arduino app. Click on Socket Mode Press the execute button to enter the control user interface (UI). 5. Press the edit button to enter the program editing page. Edit button Execute button CPF Arduino app Control user interface (UI) Program editing page 7 Lesson 27: CPF Weather Station

3 Code recap (JavaScript) Let s explore some of the code used in the previous lessons. 1. d6 = cpf.get( socket d6 ); The cpf.get( socket d6 ); statement returns the value of the button.

8 3 Code recap (JavaScript) Let s explore some of the code used in the previous lessons. 1. d6 = cpf.get( socket d6 ); The cpf.get( socket d6 ); statement returns the value of the button. (Returns a numeric value of 1 if the button is pressed and 0 if the button is not pressed) and stores it in a variable called d6. 2. cpf.set( socket d5, 262, 250); The cpf.set( socket d5, 262, 250); statement plays a tone via the attached buzzer based on the specified frequency and duration. 3. If / else: The if / else statement is used to conditionally run code depending on whether a Boolean condition is true or false. In this example from lesson 1, if the light sensor value is less than (<) 500, the RGB LED light will light up (based on the values taken from the UI); or else (else), if the light sensor value is greater than (>) 500, the RGB LED light will automatically turn off: cpf.set( rgb led, 0, 0, 0); 4. Math.random() Through Math.random(), a random number between 0 and is generated. If we want to generate a whole number in a range such as we first need to multiply the result of the random function by 255 and then round the result to produce a whole number e.g., 5. cpf.sleep(1000); The cpf.sleep(1000); statement is used to pause the code (time set in milliseconds). In the example above, the program is paused for 1000 milliseconds (1 second). 6. Set CPF control request: Finally, the cpf.repeat(); statement, usually found at the end of the program, tells the program to run the code from the beginning again. The program will continuously repeat until the user closes the app or stops the program manually. 8 Lesson 27: CPF Weather Station

4 Step-by-step instructions (JavaScript) - Part 1 Let s write the code for our Weather Station app. 1. Clear the existing code so that you have a blank canvas to create your new program.

1 2 3 Note: You can return to the original program at any time by clicking on the restore icon in the Save/load menu. 2. First, let s give our new script a name.

In previous lessons, we used the cpf.repeat() command to repeat our code until manually stopped by the user.

9 4 Step-by-step instructions (JavaScript) - Part 1 Let s write the code for our Weather Station app. 1. Clear the existing code so that you have a blank canvas to create your new program. Press and hold on a selection of code and click on Select all (1). Click on Cut (2) to create a blank canvas (3) Note: You can return to the original program at any time by clicking on the restore icon in the Save/load menu. 2. First, let s give our new script a name. Click on line 1 and type in the following: //CPF Weather Station 3. Next, let s set the title for our app. Click on line 2 and type the following: ui.set( title, CPF Weather Station ); 4. In previous lessons, we used the cpf.repeat() command to repeat our code until manually stopped by the user. However, in this example, we only want to run our code 10 times each time taking a reading from each of the attached sensors and uploading the collected data to the cloud. To do this, we will use a for loop. Click on line 4 and type the following: var index; for (index=1; index<=10; index++) { 5. Next, let s take a reading from each of the attached sensors. Click on line 6 and type the following: var humid = cpf.get( socket a0, dht11humi ); var temp = cpf.get( socket a0, dht11temp ); var water = cpf.get( socket d6 ); var moist = cpf.get( socket a2 ); 6. Next, for each reading, let s record the date and time. Click on line 10 and add the following: var d = new Date(); Note: Make sure you leave a small indentation before lines 6 to 10 (See image below). 9 Lesson 27: CPF Weather Station

10 4 Step-by-step instructions (JavaScript) - Part 2 7. Next, let s take the readings from each of our sensors and upload them to the cloud. Click on line 12 and enter the following: var obj = { temperature : temp; humidity : humid, rain : water, moisture : moist, date : d}; var str = JSON.stringify(obj); var storeid = store + index; var status = aop.setstore(storeid, str); 8. Next, let s display the uploaded data on the user interface (UI). Click on line 17 and type the following: ui.set( title, Upload store + index status); ui.set( content, JSON content:\n + str); 9. Next, let s add a delay between each reading. We also need to close our for loop. Click on line 20 and add the following: cpf.sleep(1000); } 10. Finally, let s display a message on the user interface (UI) to notify the user when the upload is complete. Click on line 23 and type the following: ui.set( title, Weather data uploaded ); 11. Run your code. Your finished code should look like this. Change the number of readings taken by changing the number of times the code is repeated index<=10;. Change the interval (time) between each reading cpf.sleep(1000);. 10 Lesson 27: CPF Weather Station

11 4 Extension Students to write a new program which downloads the data from the cloud, as if downloading from a remote weather station, and displays the results in a meaningful way. For help with this task, refer to lesson 6. 5 Differentiation To support students, provide step by step guides. To stretch students ask them to create a flowchart / pseudocode of their code first or code their solution using JavaScript. 6 Homework Students to investigate how weather predictions are made and present their findings in the form of a presentation or report. Students to include in their presentation / report what data is needed to predict the weather and explain why, even with the latest technology, forecasters don t always get the weather forecast right! Alternatively, students can explore and list the benefits and drawbacks of using computers for logging data. 7 Links Learning about the weather (Met Office): How weather forecasts are created: Disclaimer: Use these sites at your own risk. Acer is not responsible for the content of external Internet sites. We recommend that you check the suitability of any recommended websites links before giving them to students. 11 Lesson 27: CPF Weather Station

Lesson 25 Flood Warning System

Lesson 25 Flood Warning System 1 What you will need CloudProfessor (CPF) Moisture Sensor Buzzer Arduino Leonardo Android Shield USB lead Overview In this lesson, students will create a flood warning system