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        Grove - Vibration Sensor(SW-420) The Grove - Vibration Sensor (SW-420) is a high sensitivity non-directional vibration sensor. When the module is stable, the circuit is turned on and the output is high. When the movement or vibration occurs, the circuit will be briefly disconnected and output low. At the same time, you can also adjust the sensitivity according to your own needs. All in all, this is a perfect module for vibration or tilt sensor. Features    Non-directional  High sensitivity  Respond to vibration, tilt  Waterproof  Compression resistance   Specification Item Value  Operating voltage  3.3V / 5V  Interface  Digital  Applications  Car, bicycle, motorcycle burglar alarm  Game control  Vibration detection Hardware Overview Pin Map     Schemaitc First, let's begin with the SW1 which at the lower left corner. Actually, the SW1 is the vibration module SW-420. When the module is in a stable state, the module is turned on. Pin2 of U1A is connected to the GND though SW1. The VR1 is the potentiometer, the Pin2 of the potentiometer is connected to the Pin3 of the U1A The U1A is a comparators. For the comparators, Vout={High,if V+>V−Low,if V+V−Low,if V+VCC/2V+=VCC/2}Vout=LowV−>VCC/2V+=VCC/2}Vout=Low Now you can set the V+ to adjust the sensitivity, just remember: the lower the voltage of V+, the higher the sensitivity😆     Platforms Supported               Arduino       Raspberry Pi         BeagleBone              Wio          LinkIt ONE            Caution The platforms mentioned above as supported is/are an indication of the module's hardware or theoritical compatibility. We only provide software library or code examples for Arduino platform in most cases. It is not possible to provide software library / demo code for all possible MCU platforms. Hence, users have to write their own software library. Getting Started Play With Arduino Hardware Materials required Seeeduino V4.2 Base Shield  Grove ‐ Vibration Sensor  Grove ‐ Buzzer          Note 1 Please plug the USB cable gently, otherwise you may damage the port. Please use the USB cable with 4 wires inside, the 2 wires cable can't transfer data. If you are not sure about the wire you have, you can click here to buy. 2 Each Grove module comes with a Grove cable when you buy. In case you lose the Grove cable, you can click here to buy.    Step 1. Connect the Grove - Vibration Sensor (SW-420) to the D2 port of the Base Shield.    Step 2. Connect the Grove - Buzzer to the D3 port of the Base Shield.  Step 3. Plug Grove - Base Shield into Seeeduino.  Step 4. Connect Seeeduino to PC via a USB cable. Note If we don't have Grove Base Shield, We also can directly connect this module to Seeeduino as below. Seeeduino Grove ‐ Vibration Sensor  5V  Red  GND  Black  NC  White  D2  Yellow  Seeeduino Grove ‐ Buzzer  5V  Red  GND  Black  NC  White  D3  Yellow      Software Note If this is the first time you work with Arduino, we strongly recommend you to see Getting Started with Arduinobefore the start.  Step 1. Open your Arduino IDE, start a new sketch.  Step 2. Copy all the code below, or you can just click the icon in upper right corner of the code block to copy the following code into the new sketch. 1// constants won't change. They're used here to set pin numbers: 2const int buttonPin = 2; // the number of the pushbutton pin // the number of the buzzer pin 3const int buzzer = 3; 4 5// variables will change: // variable for reading the pushbutton status 6int buttonState = 0; 7 8void setup() { 9 // initialize the LED pin as an output: 10 pinMode(buzzer, OUTPUT); 11 // initialize the pushbutton pin as an input: 12 pinMode(buttonPin, INPUT); 13} 14 15void loop() { 16 // read the state of the pushbutton value: 17 buttonState = digitalRead(buttonPin); 18 19 // check if the pushbutton is pressed. If it is, the buttonState is HIGH: 20 if (buttonState == HIGH) { 21 // turn LED on: 22 digitalWrite(buzzer, LOW); 23 } else { 24 // turn LED off: 25 digitalWrite(buzzer, HIGH); 26 } 27}  Step 3. Upload the demo. If you do not know how to upload the code, please check How to upload code. Success If every thing goes well, everytime you move, shake or tilt the Grove - Vibration Sensor the Grove - buzzer will ring. Project This is the introduction Video of this product, simple demos, you can have a try. Tech Support Please do not hesitate to submit the issue into our forum                             http://wiki.seeedstudio.com/Grove‐Vibration_Sensor_SW‐420/ 11‐5‐18