Version 1.1.0

This release contains updates to the datalogger firmware code and a completed printed circuit board (PCB) design for bulk manufacturing of the datalogger hardware.

Hardware

• Added completed PCB design and manufacturing files
• Updated documentation.

Firmware

• Added SD card writing error detection. The firmware now attempts to detect errors and starts over with a new data file if an error is detected.
• Added user-adjustable data recording interval. This can now be configured by the user through the firmware's interface.
• Modified firmware to chunk data files by day instead of creating one long file for the whole logging period
• Added the ability for a user to input the conversion factor from pulses to flow rate (GPM) rather than picking a meter size.
• Updated firmware documentation.

Known Issues

• Despite changes in this issue there we are still experiencing some issues with SD card writing. These issues will be fixed in a subsequent release.

Version 1.0.0

This version of the MWM datalogger materials (December 2019) is a first formal release of working code that we are actively using in the field for data collection.

Datalogger hardware:

• Base logger is an Arduino Pro with code written in Arduino IDE
• Hardware is running at 3.3 V and 8 MHz
• Works with a sensor installed on the outside of a magnetically driven residential water meter
• Processes data from a LIS3MDL magnetometer sensor sampling at 570 Hz

Software includes the following features:

• Stores pulse count from water meter on an SD Card - full SD cards or MicroSD can be used in sizes up to 32GB (we are currently using 8 GB cards)
• Provides menu options for pulse count resolution, initialization of date and time, diagnostic listing of current water flow, control over starting and stopping logging sessions

Known issues:

• With this version there is a known issue in writing data to the SD card that causes some data files to become corrupt. We believe that this is power-related.