1. Stand-Alone and Mesh Networks of Dissolved Oxygen (DO) Monitors
Advisors
Joseph Shinar
Ruth Shinar
with
Bob Mayer
Alex Smith
Sd-May11-20
Betty Nguyen
Scott Mertz
David Hansen
Ashley Polkinghorn
Scott

2. Problem Statement Existing DO Sensors are expensive.
No existing DO Sensors have remote sensing capabilities.
DO levels vary with temperature and ISTI’s existing DO Sensor does not take this into account.
Battery life is subpar in the existing implementation
Calibration currently involves reprogramming
Existing code is not neat or maintainable
(problem statement – needs to include background, etc)
Ashley

3. Project Objective
Incorporate power saving features including a device sleep mode.
Account for temperature variation
Temperature sensor
DO level calculation modification
Ensure functioning star network
Test and fix integrated units
Add new calibration message
Add Zigbee node - to - DO Monitor communication
(problem statement – needs to include background, etc)
Ashley

4. Conceptual Sketch
Ashley

5. Functional Requirements
Required
The monitor units shall take readings of dissolved oxygen.
The monitor units shall wirelessly transmit their readings to the master controller.
The master controller shall request readings from each monitor unit.
The master controller should have a graphical user interface to display measurements.
The master controller user interface shall allow the user to poll a monitor unit for data.
The system shall query each monitor unit for data through the master controller.
The Windows service shall log all data processed through the unit in a SQL database.
The network nodes shall create a star-like topology
Optional
The network nodes shall create mesh network topology
The master controller shall send calibration data to each monitor unit.
David

6. Non-functional Requirements
The system shall have an optimal operating range of 1000 meters.
The microcontroller shall enter a sleep state between samples.
A temperature probe shall be attached to the existing sensor probe to increase calculated accuracy.
David

7. Functional Decomposition
Scott

8. DO Monitor
<detailed design>
Scott

9. Zigbee Node (should we insert more for detailed design?)
Betty

10. MasterController GUI
Ashley

11. Accomplishments Documentation created and expanded
Temperature sensor tested in hardware and software
Developed a solution for our soft-key power switch
Fixed numerous hardware errors
Verified PC to Network Coordinator to Zigbee Node communication
Calibration framework completed
Betty

12. Project Status
Betty

13. Schedule
David