Lesson 25 Flood Warning System

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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

Know how to collect data received from sensors. Interpret data retrieved from sensors and present the results in a meaningful way.

Most Collect data from the moisture sensor and raise an alarm if water is detected. Some Make predictions based on the data retrieved from the moisture sensor.

1 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 or bath overflow detector using a moisture sensor and a buzzer. Learning Objectives Understand how flood monitoring systems work, 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 flood monitoring systems work and the importance of data collection. Most Collect data from the moisture sensor and raise an alarm if water is detected. Some Make predictions based on the data retrieved from the moisture sensor. Curriculum Links (Computing PoS) Designs simple algorithms using loops, and selection i.e. if statements. (AL) Uses logical reasoning to predict outcomes. (AL) Understands that people interact with computers. Knows common uses of information technology beyond the classroom. (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 25: Flood Warning System

Leonardo. Attach the moisture sensor to port A0 and the buzzer to port D5. 3.

notification to launch the Arduino Leonardo APP, and select the CPF Arduino Blockly app. Click on Lesson 9.

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 A0 and the buzzer to port D5. 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 25: Flood Warning System

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.

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. Tone/speaker Pin# D5 (frequency/duration): The Tone/speaker Pin# D5 (frequency/duration) block plays a tone via the attached buzzer based on the specified frequency and duration. 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 25: Flood Warning System

3 Step-by-step instructions (Blockly) Let s write the code for our flood warning system. 1.

Note: You can return to the original program at any time by clicking on the restore icon (3). 1 3 2 3. First, let s set the Title name. Click on CPF UI.

Next, we need to write the condition which checks for moisture and sounds an alarm when moisture is detected. For this we will use an IF statement.

Drag the if do block and attach it to the end of your code (4). b) Click on the logic tab. Drag the = block and attach it to your if block.

Drag the Moisture Sensor block onto the first slot in your logic block (6). d) Click on the Math tab.

4 3 Step-by-step instructions (Blockly) Let s write the code for our flood warning system. 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 Flood Detector. 4. Next, we need to write the condition which checks for moisture and sounds an alarm when moisture is detected. For this we will use an IF statement. Let s start with the condition for when moisture is detected (Moisture > 100). a) Click on the Logic tab. Drag the if do block and attach it to the end of your code (4). b) Click on the logic tab. Drag the = block and attach it to your if block. Change equals = to greater than > (5). 4 5 c) Click on the Sensor Modules tab. Select Input Devices and Environment Sensors. Drag the Moisture Sensor block onto the first slot in your logic block (6). d) Click on the Math tab. Drag the 0 block onto the second slot in your logic block. Change this value to a 100 (7). 5. Next, let s write the code to sound the alarm when moisture is detected. To do this, we will program the buzzer to play two different tones and repeat this 5 times. For this, we will need to use a For loop. Click on the Math tab. Drag the 0 block onto the second slot in your logic block. Change this value to a 100 (8) Lesson 25: Flood Warning System

3 Step-by-step instructions (Blockly) - Part 2 5. Next, let s write the code to sound the alarm. a) Click on the Sensor Modules tab. Select Output Devices and Sound & Light.

Change the time to 250 (10). c) Repeat steps a and b (above) however, change the frequency of the second Tone/speaker block to D:Re (11). 10 9 11 6.

5 3 Step-by-step instructions (Blockly) - Part 2 5. Next, let s write the code to sound the alarm. a) Click on the Sensor Modules tab. Select Output Devices and Sound & Light. Drag the Tone/speaker Pin# block and place it inside the for loop (9). b) Click on the ÇPF Devices tab and select Çloud Service. Drag the Delay Time(ms) block and attach it to the Tone/ speaker block. Change the time to 250 (10). c) Repeat steps a and b (above) however, change the frequency of the second Tone/speaker block to D:Re (11) Finally, we want the program to run continuously until the user ends the program. Select the CPF Devices tab. Click and drag the Set CPF control repeat block and attach it to the end of your code. Instructions To activate the motion sensor, place the tip of the moisture sensor (A) into a small glass of water (See figure 1). Figure 1. A Your finished code should look like this. Try changing the tones used for the buzzer. Also try changing the timings (cpf.sleep) and the number of times the alarm repeats. 5 Lesson 25: Flood Warning System

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.

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.

6 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 A0 and the buzzer to port D5. 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 6 Lesson 25: Flood Warning System

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.

7 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. 7 Lesson 25: Flood Warning System

4 Step-by-step instructions (JavaScript) - Part 1 Let s write the code for our flood warning system. 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.

Next, we need to take a reading from the moisture sensor and display the reading on the user interface (UI). To do this, we are going to use a function.

8 4 Step-by-step instructions (JavaScript) - Part 1 Let s write the code for our flood warning system. 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: //Flood Detector 3. Next, let s set the title for our app. Click on line 2 and type the following: ui.set( title, Flood Detector ); 4. Next, we need to take a reading from the moisture sensor and display the reading on the user interface (UI). To do this, we are going to use a function. Click on line 4 and type the following: function GetMoisture() { var Moisture = cpf.get( socket a0 ); ui.set( socket a0, Moisture); return Moisture; } Remember to leave a small indentation before lines 5 to7 (See image above). 5. Next, we need to write the condition which checks for moisture and sounds an alarm when moisture is detected. For this we will use an IF statement. Let s start with the condition for when moisture is detected (Moisture > 100). a) Click on line 10 and type in the following: if (GetMoisture() > 100) { b) Next, let s write the code which sounds the alarm if moisture is detected. To do this, we will program the buzzer to play two different tones and repeat this 5 times. For this, we will need to use a For loop. Click on line 11 and type the following: for (var count = 0; count < 5; count++) { Don t forget to leave a small indentation before line 11 (See image below). 8 Lesson 25: Flood Warning System

4 Step-by-step instructions (JavaScript) - Part 2 6. Next, let s write the code to sound the alarm. a) Click on line 12 and type in the following: cpf.set( socket d5, 523, 500); ui.

9 4 Step-by-step instructions (JavaScript) - Part 2 6. Next, let s write the code to sound the alarm. a) Click on line 12 and type in the following: cpf.set( socket d5, 523, 500); ui.set( socket d5, 523, 500); cpf.sleep(250); cpf.set( socket d5, 523, 500); ui.set( socket d5, 523, 500); cpf.sleep(250); d) Let s now close our for loop and if statement. Click on line 18 and add the following lines of code: Remember to leave a small indentation before lines 11 to 18 (See image above). } } 7. Finally, let s run the code until the user ends the program. Click on line 20 and type the following: cpf.repeat(); 8. Run your code. Instructions To activate the moisture sensor, place the tip of the moisture sensor (A) into a small glass of water (See figure 1). Figure 1. A Your finished code should look like this. Try changing the tones used for the buzzer. Also try changing the timings (cpf.sleep) and the number of times the alarm repeats. 9 Lesson 25: Flood Warning System

10 4 Extension Students to add an RGB LED and program it to flash on and off when water is detected. 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 the need for flood protection and explore the risks and costs associated with floods. 7 Links Flood protection systems: Condition monitoring (Wikipedia): 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. 10 Lesson 25: Flood Warning System

Lesson 27 CPF Weather Station

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