The SW-420 Vibration Sensor will detect large disturbances and send the data to the Arduino. The occurrence and strength (Intensity) of the vibrations will be displayed on an LCD screen.

Using the Nicla Voice’s onboard PDM microphone and an Adafruit DRV2605L haptic motor controller, an ERM vibration motor is used to alert the sleeper. The haptic motor driver is connected to the Nicla ...

[Lee] took off the vibration motor and used it as an output port for a simple program to dump the ROM. An Arduino picked up the data at a low baud rate and produced an output file.