Grove - Tilt Switch

Introduction

The Grove-Tilt Switch is the equivalent of a button, and is used as a digital input. Inside the tilt switch is a pair of balls that make contact with the pins when the case is upright. Tilt the case over and the balls don’t touch, thus not making a connection. It is wired to the SIG line, NC is not used on this Grove.

Features

• Grove Interface
• Easy to use
• Simple Grove module

Specifications

Item	Min	Typical	Max	Unit
Voltage	4.75	5.0	5.25	V
Connecting Angle	10° ~170°			-
Disconnect angle	190° ~350°			-
Electrical Life	100,000			Cycle

Platforms Supported

Usage

With Arduino

The SIG pin of the Grove - Tilt Switch output LOW normally. When the Tilt Switch is upright, a pair of balls inside the tilt switch will contact with the pins and the SIG pin will output HIGH.

The following sketch demonstrates a simple application of using the Tilt Switch and Grove - Button to control the led.

• As the following picture indicates, the Tilt Switch is connected to digital port 5 of the Grove - Base Shield and the Grove-Button to digital port 7. The LED is connected to digital port 2. The hardware installation is as follows:

• Copy and paste code below to a new Arduino sketch.

void setup()
{
    pinMode(1, OUTPUT);
    pinMode(5, INPUT);
    pinMode(7, INPUT);
}

void loop()
{

    if (digitalRead(5)==HIGH)
    {
        digitalWrite(1, HIGH);
        delay(100);
        digitalWrite(1, LOW);
    }

    if (digitalRead(7)==HIGH)
    {
        digitalWrite(1, HIGH);
        delay(200);
        digitalWrite(1, LOW);
    }

}

• Upload the code.
• Then the LED will light when you press the button or activate the tilt-switch. Have a try!

Reference

The operating angle of Grove-Tilt Switch as shown below:

With Raspberry Pi

1.You should have a Raspberry Pi and a Grovepi or Grovepi+.

2.You should have completed configuring the development enviroment, otherwise follow here.

3.Connection

• Plug Tilt_Switch into grovepi socket D3 by using a grove cable.

4.Navigate to the demos’ directory:

       cd yourpath/GrovePi/Software/Python/

• To see the code

    nano grovepi_tilt_switch.py   # "Ctrl+x" to exit #

    import time
    import grovepi

    # Connect the Grove Tilt Switch to digital port D3
    # SIG,NC,VCC,GND
    tilt_switch = 3

    grovepi.pinMode(tilt_switch,"INPUT")

    while True:
        try:
            print grovepi.digitalRead(tilt_switch)
            time.sleep(.5)

        except IOError:
            print "Error"

5.Run the demo.

    sudo python grove_tilt_switch.py

6.Result: Put the sensor upright by one side, the SIG pin will output HIGH.

Resources

• Grove - Tilt Switch v1.0 Eagle File
• Grove - Tilt Switch v1.1 PDF File
• Grove - Tilt Switch v1.1 Eagle File
• SW200D Datasheet

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