ServoScreen.kv

<ServoScreen>:
    name: 'servo'
    FloatLayout:
        size_hint: None, None

    DPEAButton:
        # Quit button
        size: 100, 100
        center_x: root.width * 0.95
        center_y: root.height * 0.95

        background_color: 0,0,0,0
        color: 0.035, 0.152, 0.725, 1

        text: "Quit"
        on_press: root.exit_program()

    DPEAButton:
        #Go back button
        size: 100, 100
        center_x: root.width * 0.95
        center_y: root.height * 0.8
        color: 0.035, 0.152, 0.725, 1

        text: "Go back"
        on_press: root.transition_back()

    # button for basic rotation. Used to check if servo works
    DPEAButton:
        size: 100, 100
        center_x: root.width * 0.85
        center_y: root.height * 0.8

        color: 0.035, 0.152, 0.725, 1
        text: "Basic Rotation"

        on_press: root.rotateServo()

    # button for rotateServoToAngle() function
    DPEAButton:
        size: 100, 100
        center_x: root.width * 0.65
        center_y: root.height * 0.8

        color: 0.035, 0.152, 0.725, 1
        text: "Rotate to An Angle"

        on_press: root.rotateServoToAngle()

    # button to select servo 0
    DPEAButton:
        id: servo_0
        size: 100, 100
        center_x: root.width * 0.35
        center_y: root.height * 0.8

        color: 0.035, 0.152, 0.725, 1
        text: "Servo 0"

        on_press: root.selectServo0()

    # button to select servo 1
    DPEAButton:
        id: servo_1
        size: 100, 100
        center_x: root.width * 0.45
        center_y: root.height * 0.8

        color: 0.035, 0.152, 0.725, 1
        text: "Servo 1"

        on_press: root.selectServo1()

# buttons and labels for keyboard
    DPEAButton:
        text: '1'
        id: one
        center_x: root.center_x - 100
        center_y: root.center_y + 60
        color: 0.019, 0.337, 1, 1
        size: 80, 80
        on_press: root.setServoAngle(1)

    DPEAButton:
        text: '2'
        id: two
        center_x: root.center_x
        center_y: root.center_y + 60
        color: 0.019, 0.337, 1, 1
        size: 80, 80
        on_press: root.setServoAngle(2)

    DPEAButton:
        text: '3'
        id: three
        center_x: root.center_x + 100
        center_y: root.center_y + 60
        color: 0.019, 0.337, 1, 1
        size: 80, 80
        on_press: root.setServoAngle(3)

    DPEAButton:
        text: '4'
        id: four
        center_x: root.center_x - 100
        center_y: root.center_y - 40
        color: 0.019, 0.337, 1, 1
        size: 80, 80
        on_press: root.setServoAngle(4)

    DPEAButton:
        text: '5'
        id: five
        center_x: root.center_x
        center_y: root.center_y - 40
        color: 0.019, 0.337, 1, 1
        size: 80, 80
        on_press: root.setServoAngle(5)

    DPEAButton:
        text: '6'
        id: six
        center_x: root.center_x + 100
        center_y: root.center_y - 40
        color: 0.019, 0.337, 1, 1
        size: 80, 80
        on_press: root.setServoAngle(6)


    DPEAButton:
        text: '7'
        id: seven
        center_x: root.center_x - 100
        center_y: root.center_y - 140
        color: 0.019, 0.337, 1, 1
        size: 80, 80
        on_press: root.setServoAngle(7)

    DPEAButton:
        text: '8'
        id: eight
        center_x: root.center_x
        center_y: root.center_y - 140
        color: 0.019, 0.337, 1, 1
        size: 80, 80
        on_press: root.setServoAngle(8)

    DPEAButton:
        text: '9'
        id: nine
        center_x: root.center_x + 100
        center_y: root.center_y - 140
        color: 0.019, 0.337, 1, 1
        size: 80, 80
        on_press: root.setServoAngle(9)

    DPEAButton:
        text: '0'
        id: zero
        center_x: root.center_x
        center_y: root.center_y - 240
        color: 0.019, 0.337, 1, 1
        size: 80, 80
        on_press: root.setServoAngle(0)

    DPEAButton:
        text: 'Del'
        id: backspace
        center_x: root.center_x - 100
        center_y: root.center_y - 240
        color: 0.019, 0.337, 1, 1
        size: 80, 80
        on_press: root.removeNum()

    # label for inputted angle
    Label:
        id: angle_lable
        text: 'Servo angle: ' + root.my_angle0
        font_size: 40
        center_x: root.width * 0.20
        y: root.height * 0.05
        color: 0.0, 0.0, 0.0, 1

    # label for describing what to input
    Label:
        id: angle_info
        text: 'Enter Value (0-180) '
        font_size: 40
        center_x: root.width * 0.05
        y: root.height * 0.15
        color: 0.0, 0.0, 0.0, 1

    # label for instructions
    Label:
        id: info_label
        text: 'Notes: Select which servo you want to move\nSet angle then press Rotate to an Angle\nAn * means servo selected\nYou must select a servo in order to input angle\nMust delete data from other servo in order to\nset data for different servo\nTo use the Basic Rotation Button\nSelect a servo, and then press\nBasic Rotation'
        font_size: 25
        center_x: root.width * -0.25
        y: root.height * 0.05
        color: 0.0, 0.0, 0.0, 1

    # label for title
    Label:
        text: 'Servo Screen'
        font_size: 40
        center_x: root.width * 0.0
        y: root.height * 0.45
        color: 0.0, 0.0, 0.0, 1

    # hidden label, appears when an error occurs
    Label:
        id: error_servo
        text: ''
        font_size: 40
        center_x: root.width * 0.0
        y: root.height * -0.45
        color: 0.0, 0.0, 0.0, 1