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Monitoring Glaciers

fwd-edu-breakout=github:climate-action-kits/pxt-fwd-edu/fwd-breakout
sonar=github:climate-action-kits/pxt-fwd-edu

Step 1 @showdialog

Welcome to Monitoring Glaciers built project

Step 2 @showdialog

In this coding tutorial the device continuously measures distances to its left and right, and decides which direction to go based on which path is less obstructed.

Step 3 @showdialog

Turn on the Climate Action Kit board. breakout board

Step 4 @showhint

Click three dots besides |Download| button, and click on Connect Device. Next, follow the steps to pair your micro:bit. pair gif

Step 5 @showhint

Next, click the |Download| button to download the blank project to start-up the simulators.

Step 6 @showdialog

This is how the simulators should look after a successful download. You can see the Servo Motors along side the Pump. initial-dowload-gif

Step 7 @showhint

Look below the @boardname@ simulator to see the Climate Action Board and the connected devices. Try to turn the motors on and off using the simulator and observe the changes. servo-nocode

Step 8

Click ||fwdMotors:Motors|| drag and drop ||fwdMotors:set leftServo to 0'|| block inside ||Basic:on start|| block. Change ||fwdMotors:leftServo|| to ||fwdMotors:middleServo||.

fwdMotors.middleServo.fwdSetAngle(0)
basic.forever(function () {
    })

Step 9

Click ||fwdMotors:Motors|| drag and drop ||fwdMotors:set leftServo to 0'|| block inside ||Basic:forever|| block. Change ||fwdMotors:leftServo|| to ||fwdMotors:middleServo||. Also, change ||fwdMotors:0'|| to ||fwdMotors:90'||

fwdMotors.middleServo.fwdSetAngle(0)
basic.forever(function () {
    fwdMotors.middleServo.fwdSetAngle(90)
})

Step 10

Click ||Variables:Variables|| and then click |Make a Variable| to create these ||Variables:Variables||

  • ||Variables:RightDistance||
  • ||Variables:LeftDistance||

Step 11

Click ||Basic:Basic|| drag and drop ||Basic:pause (ms) 100|| block inside ||Basic:forever|| block under ||fwdMotors:set middleServo to 90'|| block. Change ||Basic:100|| to ||Basic:2000||.

fwdMotors.middleServo.fwdSetAngle(0)
basic.forever(function () {
    fwdMotors.middleServo.fwdSetAngle(90)
    basic.pause(2000)
    })

Step 12

Click ||Variables:Variables|| drag and drop ||Variables:set RightDistance to 0|| block inside ||Basic:forever|| block under ||Basic:pause (ms) 2000|| block.

fwdMotors.middleServo.fwdSetAngle(0)
basic.forever(function () {
    fwdMotors.middleServo.fwdSetAngle(90)
    basic.pause(2000)
    RightDistance = 0
    })

Step 13

Click ||fwdSensors:Sensors|| drag and drop ||fwdSensors:sonar1 distance (m)|| block to replace ||Variables:0|| of ||Variables:set RightDistance to 0|| block.

fwdMotors.middleServo.fwdSetAngle(0)
basic.forever(function () {
    fwdMotors.middleServo.fwdSetAngle(90)
    basic.pause(2000)
    RightDistance = fwdSensors.sonar1.fwdDistance()
    })

Step 14

Click ||Basic:Basic|| drag and drop ||Basic:pause (ms) 100|| block under ||Variables:set RightDistance to|| ||fwdSensors:sonar1 distance (m)||. Change ||Basic:100|| to ||Basic:2000||.

fwdMotors.middleServo.fwdSetAngle(0)
basic.forever(function () {
    fwdMotors.middleServo.fwdSetAngle(90)
    basic.pause(2000)
    RightDistance = fwdSensors.sonar1.fwdDistance()
    basic.pause(2000)
   })

Step 15

Click ||fwdMotors:Motors|| drag and drop ||fwdMotors:set leftServo to 0'|| block under ||Basic:pause (ms) 2000|| block. Change ||fwdMotors:leftServo|| to ||fwdMotors:middleServo|| and change ||fwdMotors:0'|| to ||fwdMotors:-90'||.

fwdMotors.middleServo.fwdSetAngle(0)
basic.forever(function () {
    fwdMotors.middleServo.fwdSetAngle(90)
    basic.pause(2000)
    RightDistance = fwdSensors.sonar1.fwdDistance()
    basic.pause(2000)
    fwdMotors.middleServo.fwdSetAngle(-90)
    })

Step 16

Click ||Basic:Basic|| drag and drop ||Basic:pause (ms) 100|| block under ||fwdMotors:set middleServo to -90'|| block. Change ||Basic:100|| to ||Basic:2000||

fwdMotors.middleServo.fwdSetAngle(0)
basic.forever(function () {
    fwdMotors.middleServo.fwdSetAngle(90)
    basic.pause(2000)
    RightDistance = fwdSensors.sonar1.fwdDistance()
    basic.pause(2000)
    fwdMotors.middleServo.fwdSetAngle(-90)
    basic.pause(2000)
   })

Step 17

Click ||Variables:Variables|| drag and drop ||Variables:set LeftDistance to 0|| block under ||Basic:pause (ms) 2000|| block.

fwdMotors.middleServo.fwdSetAngle(0)
basic.forever(function () {
    fwdMotors.middleServo.fwdSetAngle(90)
    basic.pause(2000)
    RightDistance = fwdSensors.sonar1.fwdDistance()
    basic.pause(2000)
    fwdMotors.middleServo.fwdSetAngle(-90)
    basic.pause(2000)
    LeftDistance = 0
    })

Step 18

Click ||fwdSensors:Sensors|| drag and drop ||fwdSensors:sonar1 distance (m)|| block to replace ||Variables:0|| of ||Variables:set LeftDistance to 0|| block.

fwdMotors.middleServo.fwdSetAngle(0)
basic.forever(function () {
    fwdMotors.middleServo.fwdSetAngle(90)
    basic.pause(2000)
    RightDistance = fwdSensors.sonar1.fwdDistance()
    basic.pause(2000)
    fwdMotors.middleServo.fwdSetAngle(-90)
    basic.pause(2000)
    LeftDistance = fwdSensors.sonar1.fwdDistance()
    })

Step 19

Click ||Basic:Basic|| drag and drop ||Basic:pause (ms) 100|| block under ||Variables:set LeftDistance to|| ||fwdSensors:sonar1 distance (m)|| block . Change ||Basic:100|| to ||Basic:2000||.

fwdMotors.middleServo.fwdSetAngle(0)
basic.forever(function () {
    fwdMotors.middleServo.fwdSetAngle(90)
    basic.pause(2000)
    RightDistance = fwdSensors.sonar1.fwdDistance()
    basic.pause(2000)
    fwdMotors.middleServo.fwdSetAngle(-90)
    basic.pause(2000)
    LeftDistance = fwdSensors.sonar1.fwdDistance()
    basic.pause(2000)
  })

Step 20

Click ||Logic:Logic|| drag and drop ||Logic:if true then else|| block under ||Basic:pause (ms) 2000|| block.

fwdMotors.middleServo.fwdSetAngle(0)
basic.forever(function () {
    fwdMotors.middleServo.fwdSetAngle(90)
    basic.pause(2000)
    RightDistance = fwdSensors.sonar1.fwdDistance()
    basic.pause(2000)
    fwdMotors.middleServo.fwdSetAngle(-90)
    basic.pause(2000)
    LeftDistance = fwdSensors.sonar1.fwdDistance()
    basic.pause(2000)
    if (true) {
      } else {
        }
    })

Step 21

Click ||Logic:Logic|| drag and drop ||Logic:0 < 0|| block to replace ||Logic:true|| condition.

fwdMotors.middleServo.fwdSetAngle(0)
basic.forever(function () {
    fwdMotors.middleServo.fwdSetAngle(90)
    basic.pause(2000)
    RightDistance = fwdSensors.sonar1.fwdDistance()
    basic.pause(2000)
    fwdMotors.middleServo.fwdSetAngle(-90)
    basic.pause(2000)
    LeftDistance = fwdSensors.sonar1.fwdDistance()
    basic.pause(2000)
    if (0 < 0) {
        } else {
        }
    })

Step 22

Click ||Variables:Variables|| drag and drop ||Variables:RightDistance|| block to replace left ||Logic:0|| of ||Logic:Comparison|| block. Click ||Variables:Variables|| again drag and drop ||Variables:LeftDistance|| block to replace right ||Logic:0|| of ||Logic:Comparison|| block.

fwdMotors.middleServo.fwdSetAngle(0)
basic.forever(function () {
    fwdMotors.middleServo.fwdSetAngle(90)
    basic.pause(2000)
    RightDistance = fwdSensors.sonar1.fwdDistance()
    basic.pause(2000)
    fwdMotors.middleServo.fwdSetAngle(-90)
    basic.pause(2000)
    LeftDistance = fwdSensors.sonar1.fwdDistance()
    basic.pause(2000)
    if (RightDistance < LeftDistance) {
        } else {
        }
    })

Step 23

Click ||Basic:Basic|| drag and drop ||Basic:show string " "|| block inside ||Logic:if then|| condition. Type ||Basic:Go Left|| in ||Basic:show string " "|| block.

fwdMotors.middleServo.fwdSetAngle(0)
basic.forever(function () {
    fwdMotors.middleServo.fwdSetAngle(90)
    basic.pause(2000)
    RightDistance = fwdSensors.sonar1.fwdDistance()
    basic.pause(2000)
    fwdMotors.middleServo.fwdSetAngle(-90)
    basic.pause(2000)
    LeftDistance = fwdSensors.sonar1.fwdDistance()
    basic.pause(2000)
    if (RightDistance < LeftDistance) {
        basic.showString("Go Left")
        } else {
        }
    })

Step 24

Click ||Basic:Basic|| drag and drop ||Basic:clear screen|| block under ||Basic:show string "Go Left"|| block.

fwdMotors.middleServo.fwdSetAngle(0)
basic.forever(function () {
    fwdMotors.middleServo.fwdSetAngle(90)
    basic.pause(2000)
    RightDistance = fwdSensors.sonar1.fwdDistance()
    basic.pause(2000)
    fwdMotors.middleServo.fwdSetAngle(-90)
    basic.pause(2000)
    LeftDistance = fwdSensors.sonar1.fwdDistance()
    basic.pause(2000)
    if (RightDistance < LeftDistance) {
        basic.showString("Go Left")
        basic.clearScreen()
    } else {
    }
})

Step 25

Click ||Basic:Basic|| drag and drop ||Basic:show string " "|| block inside ||Logic:if then|| condition. Type ||Basic:Go Right|| in ||Basic:show string " "|| block.

fwdMotors.middleServo.fwdSetAngle(0)
basic.forever(function () {
    fwdMotors.middleServo.fwdSetAngle(90)
    basic.pause(2000)
    RightDistance = fwdSensors.sonar1.fwdDistance()
    basic.pause(2000)
    fwdMotors.middleServo.fwdSetAngle(-90)
    basic.pause(2000)
    LeftDistance = fwdSensors.sonar1.fwdDistance()
    basic.pause(2000)
    if (RightDistance < LeftDistance) {
        basic.showString("Go Left")
        basic.clearScreen()
    } else {
        basic.showString("Go Right")
    }
    })

Step 26

Click ||Basic:Basic|| drag and drop ||Basic:clear screen|| block under ||Basic:show string "Go Right"|| block.

fwdMotors.middleServo.fwdSetAngle(0)
basic.forever(function () {
    fwdMotors.middleServo.fwdSetAngle(90)
    basic.pause(2000)
    RightDistance = fwdSensors.sonar1.fwdDistance()
    basic.pause(2000)
    fwdMotors.middleServo.fwdSetAngle(-90)
    basic.pause(2000)
    LeftDistance = fwdSensors.sonar1.fwdDistance()
    basic.pause(2000)
    if (RightDistance < LeftDistance) {
        basic.showString("Go Left")
        basic.clearScreen()
    } else {
        basic.showString("Go Right")
        basic.clearScreen()
    }
})

Step 27

Click ||Basic:Basic|| drag and drop ||Basic:pause (ms) 100|| block under ||Logic:if then else || block. Change ||Basic:100|| to ||Basic:1000||.

fwdMotors.middleServo.fwdSetAngle(0)
basic.forever(function () {
    fwdMotors.middleServo.fwdSetAngle(90)
    basic.pause(2000)
    RightDistance = fwdSensors.sonar1.fwdDistance()
    basic.pause(2000)
    fwdMotors.middleServo.fwdSetAngle(-90)
    basic.pause(2000)
    LeftDistance = fwdSensors.sonar1.fwdDistance()
    basic.pause(2000)
    if (RightDistance < LeftDistance) {
        basic.showString("Go Left")
        basic.clearScreen()
    } else {
        basic.showString("Go Right")
        basic.clearScreen()
    }
    basic.pause(1000)
})

Step 28

Click ||Basic:Basic|| drag and drop ||Basic:pause (ms) 100|| block under ||Logic:else|| condition. Change ||Basic:100|| to ||Basic:1000||.

fwdMotors.middleServo.fwdSetAngle(0)
basic.forever(function () {
    fwdMotors.middleServo.fwdSetAngle(90)
    basic.pause(2000)
    RightDistance = fwdSensors.sonar1.fwdDistance()
    basic.pause(2000)
    fwdMotors.middleServo.fwdSetAngle(-90)
    basic.pause(2000)
    LeftDistance = fwdSensors.sonar1.fwdDistance()
    basic.pause(2000)
    if (RightDistance < LeftDistance) {
        basic.showString("Go Left")
        basic.clearScreen()
    } else {
        basic.showString("Go Right")
        basic.clearScreen()
    }
    basic.pause(1000)
})

Step 29 @showhint

|Download| and test your code. Click the bulb icon to see how the simulator shows the components working. sonar-servos

Step 30 @showhint

|Download| and test your code. Click the bulb icon to see how the simulator shows the components working. servos

Step 31 @showdialog

If after |Downloading| your project does not work please refer to the image and make sure your components are assigned correctly. correct-assignment

Step 32 @showdialog

Need help in assigning the right components to their simulators. Watch the video. final-download

Step 33 @showdialog

Congratulations on completing your Monitoring Glaciers Project!

Step 34 @showdialog

After your project is complete go back to the lesson for more challenges and extensions.