1. Fabrication of Cloud Based Thermometer using Arduino and DynamoDB
Audrey McNicholas, Matthew Tice, Katy Pieri, Evan Krentzel
Department of Bioengineering, Syracuse University, Syracuse, NY 13210
Laboratories consist of multiple machines and
incubators where temperature control is
imperative. Unnoticed system failure can cause
system temperatures to go out of range resulting in
loss of samples and costly expenses
Design, build, and evaluate a thermometer that has
the capacity to record and store data in a cloud
based server that can be accessed by computers and
smart devices.
Background Circuitry DesignDynamoDB
Functional Requirements
Budget
Product Cost
NTC Thermistor DIA 23mils ADJ LEAD
W/STUBEND GLASS COAT
$60.75
NTC Thermistor DIA 11mils ADJ LEAD
W/STUBEND GLASS COAT
$19.77
10K Precision Epoxy Thermistor 3950 NTC $4.00
micro OLED breakout LCD 13003 $14.95
Arduino Yún $66.64
Circuitry components, 3D printing FREE
Total (to this date) $166.11
Amount remaining for insulation, lab testing $333.89
Acknowledgments
CAD Housing
Thanks to the Syracuse University College of
Engineering and Computer Science for the
resources and facilities throughout this project.
Additionally thanks to Dr. Zachman , as well as our
client from Welch Allyn, Joe Smith.
Temperature readings: Consistent and accurate
temperature readings (±1ºC)
Temperature range: Differentiate the difference
between programmed drop in temperature and a
temperature error (-80 - 200ºC)
Battery: Power source for the thermometer and
circuitry, 9V battery
Probe: Flexible sensor will allow for better
temperature measurements in hard to reach places.
Alerts: Sent to computer or smart device when
temperature has gone out of the user set range.
Constraints
Size: small enough to fit in an application
(incubator/HPLC) without taking up valuable space
Durability: Drop resistant, shatterproof,
waterproof, heat and cold resistant device. Capable
of withstanding extreme temperatures (-80 °C to
200 °C); handle liquid and corrosive environments.
Battery: Rechargeable and can remain a closed
system. Capable of monitoring a system for an
extended period on a single charge.
FDA approved: If used in hospitals or other
biological settings, then it must be bioinert.
Testing Protocols
Calibrating the Thermistor
Three temperature ranges:1-5ºC, 21-30ºC, and 35-36ºC
After calibration, coefficients to Steinhart-Hart equation obtained
A:-0.002169122934 B:0.000757873106 C:-0.000001888936*
*Coefficients obtained for 10K Precision Epoxy Thermistor 3950 NTC
Handshake: between the server and smart device
IAM: gives WiTS root access, specific access to
read-only users
Temperature Table: records wireless readings
that will be displayed as well as creates user-set
alarms
Communication: integrates Amazon resource
name into master Arduino code
Access-key: customized per user
Coding: Arduino Programming language is a C derivative in
combination with python