Abstract
Following on from work on the SURFTEC project, this part of the Selkie project is looking at the use of a low-cost datalogger based around a single-board computer and a modular software platform.
Requirements identified as part of the previous project or its review included:
• designed to operate from low voltage DC
• able to record multiple serial data streams
• able to timestamp recorded data
• flexible enough to allow use with different combinations of sensors and equipment
The system uses a Raspberry Pi 4, interfacing with other sensors using a combination of directly connected hardware, serial/USB links, and network communication.
The Pi itselfhas no analog inputs, so these are provided by an expansion board connected to the Pi and dedicated ADC adaptors connected to an Arduino, which provides the data to the Pi over a USB serial connection