WAMPUM User Manual
Contents
1. WAMPUM User Manual University of Rochester Electrical amp Computer Engineering Senior Design 2015 Contents 1 Project Description 2 Block Diagram 3 Wireless Node 3 1 PCB Without Attachments 3 2 PCB With Battery Sensor amp XBee Module 3 3 Node Operation 4 Web Application 4 1 Overview 4 2 Display System 4 3 Interfacing 5 Appendix 5 1 Node Schematic 5 2 Node Bill of Materials 5 3 Code 5 4 Who is WAMPUM 5 5 Acknowledgements WAMPUM 2015 http jeremywrnr com wampum 1 Project Description Our project is a system that allows for cheap heart rate monitoring in many patients simultaneously by using a wireless network There will be a base station which consists of a high gain omnidirectional antennae and a laptop The laptop will display the heart rate of the patients and generate an alert if the heart rate shows very abnormal behaviour Each patient will wear a wireless node on their wrist consisting of a small sensor placed on their finger measuring their heart rate through photoplethysmography The node will aggregate the pulse ratings and periodically update the base station with the patient s status over a wireless network In the event of an emergency the node will emit an alarm locally in addition to notifying the base station This system is a low cost support system for casualty monitoring after a disaster In an earthquake or other emergency sometimes hospitals cannot reach all patients bec2. ause their equipment is not designed to be used outside of the hospital Our system could be used to monitor unconscious patients in line to be seen by the medical staff prompting staff to see them sooner if their condition gets increasingly dire An in depth video description can be found at https youtu be uUUcI6ASRs WAMPUM 2015 http jeremywrnr com wampum 2 Block Diagram patient A Ape 4 filter amplification XBee TX i display program XBee RX nurse WAMPUM 2015 http jeremywrnr com wampum 3 Wireless Node 3 1 PCB Without Attachments Below is an annotated diagram of the WAMPUM PCB piezo atmega328 alarm XBee headers microcontroller sensor AA connector on off an WE ja pepe switch pies battery gt wa a ot y connector i a tat n WAMPUM z rev A UofR 2015 heartbeat ISP LED header quad op amp IC filtering amp amplification 3 2 PCB With Battery Sensor amp XBee Module The black wire of the phototransistor assembly should be connected to the pin labeled GND on the 3 pin connector on the top left of the PCB The li ion battery can only be inserted in one direction The XBee module should be inserted with the trapezoidal part facing to the right WAMPUM 2015 http jeremywrnr com wampum nN Mo WAMPUM rev A UofR 2015 3 3 Node Operation The node acquires the user s pulse rate by shining an infrared LED on one side of the use
3. ng patient heart rate data into a Postgres database which is then used to update the web application in real time This allows to examine the patients history as well their most recent update WAMPUM 2015 http jeremywrnr com wampum 1X 5 Append 5 1 Node Schematic PBECXTAL1 TOSC1 PD POZI PB7CXTAL2 TOSC2 PO3 PD4 lt XC POS CAING PO7 AIN1 AGND GNO GNO ATMEGA328P Released under the Creative Commons Attribution Share Alike 4 0 License https creativecommons org licenses by sa 4 8 TITLE WAMPUM_revA Design by Eddie Samuels Date 5 1 15 12 00 AM Sheet 1 1 eremywrnr com wampum WAMPUM 2015 htt 5 2 Node Bill of Materials a O e c3 399 7999 1 ND 399 3690 1 ND 399 7999 1 ND 399 7999 1 ND 160 1457 1 ND PWR 160 1456 1 ND MCP6234 E SL ND 455 1693 1 ND e Ou O w MEET e Co a ocre es moneras WAMPUM 2015 http jeremywrnr com wampum 5 3 5 4 did Code Both the Arduino and web application code for the WAMPUM project can be viewed on our github repository https ithub com jeremywrnr wampum Who is WAMPUM Team WAMPUM is composed of the following members e Ivy Awuor e Jae Min Choi e Eddie Samuels e Jeremy Warner Acknowledgements Team WAMPUM would like to thank our advisors Professor Wendi Heinzelman Professor Derefinko and Professor Motley for their guidance and assistance throughout the year We would also like to tha
4. nk the Electrical amp Computer Engineering department for sponsoring the project and providing us a place to work WAMPUM 2015 http jeremywrnr com wampum
5. r s finger and then uses a phototransistor on the other side of the finger to detect the small fluctuations in light that shines through caused by blood rushing into the finger The heartbeat LED should flash in unison with the users heartbeat This is to ensure that the sensor is properly placed on the user s finger and can be adjusted if not The number of pulses over a 10 second period are counted by the onboard microcontroller using the Arduino pulseln function and multiplied by 6 to convert to beats per minute BPM Each user s heart rate is wirelessly transmitted to a computer running a node js web application This application displays the data for each patient in real time More information about the web application can be viewed in Section 4 WAMPUM 2015 http jeremywrnr com wampum If the user s heart rate goes below 30 or above 150 then the onboard piezo alarm will sound to alert any nearby medical staff This alarm can be enabled or disabled through the web application 4 Web Application 4 1 Overview The web application is written in node js and utilizes the express js framework It is a easy way to keep track of the status of many patients simultaneously in addition to the onboard alarm that the nodes carry 4 2 Display System WAMPUM Base Monitor Patient O Mi Patient 1 MAY Patient 2 Patient 3 Mi 4 3 Interfacing We use the serialport js library to connect to Arduino and pipe incomi
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