The WisBlock Earthquake Sensor Kit uses Omron's D7S sensor chip.
It includes everything you need to build a DIY earthquake sensor with the RAK19003 WisBlock Base Board, the RAK4631 WisBlock Core module (pre-flashed with firmware), and the RAK12027 Earthquake Sensor module.

In addition to the WisBlock modules, the kit comes with our Unify enclosure which offers IP65 protection and a solar panel to recharge the battery.

The Omron D7S is the world's smallest high-precision seismic sensor. In addition to providing seismic data, it also has an alarm output that activates if a seismic intensity equivalent to 5 or higher on the JMA (Japan Meteorological Agency) seismic intensity scale occurs. This allows sensitive machines and equipment to be shut down. The D7S sensor also detects if the horizontal position of the sensor changes, which indicates a collapse of the structure where the sensor was installed.

This device can detect earthquakes (it cannot predict them), measure peak seismic intensity levels, and send peak values via LoRaWAN or LoRa P2P to a gateway.

The difference between the RAK10703-K Kit and the RAK10703 Solution is that the Solution comes fully assembled with a battery, while the Kit comes as individual modules and must be assembled by yourself. The Kit is a good choice if you want to extend the earthquake sensor with other WisBlock sensors or WisBlock interfaces.

Technical Features

• RAK12027 Earthquake Sensor
  Based on Omron D7S-A0001
  Structure collapse detection
  The use of the SI value, which has a high correlation with the seismic intensity scale that indicates the magnitude of an earthquake, provides a more precise judgment of seismic intensity scales.
  Greater degree of freedom for integration into devices and for prolonged battery operation.
  The shutdown output terminal (INT1) operates equivalently to a conventional mechanical vibration sensor and ensures compatibility with mechanical vibration sensors.
  The I2C interface can obtain earthquake information from the sensor with communications from external devices.
• RAK19003 WisBlock Mini Base Board
  Small form factor
  Supports 3 different power sources
  Optimized for low-power applications
  I2C, UART, GPIO, and analog input accessible with solder pads
  2 user-definable LEDs
  Reset button
  USB Type C debug port
  1 slot for WisBlock Core MCU
  2 slots for modules with 24-pin WisConnector
• RAK4631 WisBlock Core Module
  Nordic nRF52840:
  Ultra-low power MCU
  32-bit ARM® Cortex-M4F CPU
  64 MHz CPU clock
  1 MB Flash, 256 KB RAM
  Semtech SX1262:
  Low-power, long-range LoRa® transceiver
  LoRaWAN® 1.0.2 protocol stack (supports classes A and C)
• Unify IP65 Enclosure 100x75x38 with solar panel
• Unify WisBlock Mounting Plate 100x75x38mm with integrated LoRa antenna
• Supported Bands: RU864, IN865, EU868, AU915, US915, KR920, and AS923

The data that the sensor exposes in the payload are:

• battery (V)
• temperature (C)
• humidity (%)
• earthquake detected (yes/no)
• Spectral intensity (SI) (m/s)
• peak ground acceleration (PGA) (m/s^2)
• building collapse (yes/no)
• shutoff (yes/no)