Breakout board based on the D7S produced by Omron, the world's smallest seismic sensor. The D7S is composed of a three-axis accelerometer, of which only two are used during the detection of an earthquake and are selectable either by the user or automatically with respect to the inclination of the sensor. The SDA, SCL, SET, INT1 and INT2 pins of the D7S are available on the 6-pin strip connector; while three status LEDs (power supply, pins INT1 and INT2) are mounted on the breakout. The I²C bus allows you to change the sensor settings, or read the data relating to earthquakes, by any microcontroller that is equipped with this bus and also by Arduino. The SET pin can easily be connected to a button, without having to worry about the pull-up resistance because it is already predisposed in the breakout, and can be used to bring the sensor into initial installation mode simply by pressing it, thus avoiding having to use the I²C bus. The connection with Arduino is very simple, in fact you just need to connect the sensor power pins (VCC and GND) with the 5V and GND pins of the Arduino and the SDA and SCL pins (in Arduino UNO the pins used for the I²C bus are A4 and A5). Arduino also allows interrupt management, a very useful feature to combine with the presented sensor because it allows you to react instantly to the events generated by the D7S. To use it, simply connect pins 2 and 3 of Arduino with the pins INT1 and INT2 and record the execution of the ISR (Interrupt Service). Routine) on pin 2 when the FALLING event occurs (ie the transition from high logic to low logical value), while the one on pin 3 occurs when CHANGE occurs (both high-low and low-high logic transitions). Power supply: from 3.3 V to 5 V.

Caution: The strip connector must be soldered.

The (normally open) button is optional.

How to use it

->The board of Earthquake sensor is fully mounted. You need to solder the strip.<-