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Maxim Integrated MAXREFDES101, User Manual

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Maxim Integrated 

Page 1 of 39 

 

MAXREFDES101#: Health Sensor Platform 2.0 
User Guide 

UG6780; Rev 2; 8/19 

 

Abstract 

This user guide provides information about preparing and running the MAXREFDES101# Health 
Sensor  Platform.  This  platform  uses  several  biosensors,  power-management  ICs  (PMIC),  and 
microcontrollers  from  Maxim  Integrated

®

  in  a  wrist  worn  design  that  allows  the  capture  of 

biosignals  important  to  healthcare.  The  platform  also  contains  algorithms  for  calculating  heart 
health based on the biosensor measurements.   

Summary of Contents for MAXREFDES101

Page 1: ...paring and running the MAXREFDES101 Health Sensor Platform This platform uses several biosensors power management ICs PMIC and microcontrollers from Maxim Integrated in a wrist worn design that allows...

Page 2: ...pdating the Sensor Hub Algorithm 13 Using the PC GUI 16 USB Connection 16 BLE Connection 19 Starting the ECG Measurement 20 Starting the Temperature Measurement 22 Starting the PPG Measurement 23 Inst...

Page 3: ...embedded heart rate algorithm to the MAX32664 15 Figure 14 USB connection to PC using a USB Type C cable left and Pico adapter board right 16 Figure 15 Scan for devices 17 Figure 16 Successful connec...

Page 4: ...nyway 33 Figure 36 mbed Serial Port in Device Manager 33 Figure 37 MSD connection to PC using USB Type C cable left and Pico adapter board right 34 Figure 38 Flash Log Parser 35 Figure 39 Log file PPG...

Page 5: ...Maxim Integrated Page 5 of 39 Detailed Hardware Description Figure 1 MAXREFDES101 wearable form factor in detail Figure 2 MAXREFDES101 exploded view...

Page 6: ...during a firmware upgrade for the micro board Watch enclosure Battery 1 USB Micro B cable for firmware upgrade of the micro board 1 USB Type C cable for PC communication with the micro board or chargi...

Page 7: ...Maxim Integrated Page 7 of 39 System Diagram Figure 3 MAXREFDES101 system diagram...

Page 8: ...The MAXDAP TYPE C Pico adapter board has two USB Micro B connectors The top connector next to the push button is used for updating the firmware of the micro board The left connector next to the DEVIC...

Page 9: ...mode temperature mode and info mode To cycle between modes press and release button 2 or button 3 Figure 5 Watch display modes Note There is no display in ECG mode because the noise from the display...

Page 10: ...es at the center of the back of the watch Figure 6 PPG measurement ECG Measurement To take an ECG measurement wear the watch on the wrist and make sure the skin has direct contact with electrodes 2 an...

Page 11: ...REFDES101 Design Resources tab Note The software package includes the latest firmware algorithm and the corresponding Windows or Android application All three must be updated to ensure compatibility 2...

Page 12: ...lgorithm and the corresponding Windows or Android application All three must be updated to ensure compatibility 2 Insert the Pico adapter board into the USB Type C connector of the watch This establis...

Page 13: ...r Hub algorithm can be updated with the PC GUI by performing the following steps 1 Download and extract the Eval Package from the Software section on the MAXREFDES101 Design Resources tab Note The sof...

Page 14: ...PPG Figure 12 Maxim DeviceStudio connected devices 5 Go to Device Tab Update SmartSensor_MAX32660 Software Update Firmware and select the msbl file from the extracted Eval Package 6 The embedded hear...

Page 15: ...Maxim Integrated Page 15 of 39 Figure 13 Upload embedded heart rate algorithm to the MAX32664...

Page 16: ...h USB or Bluetooth Low Energy BLE The Windows 7 PC GUI only supports connection to the MAXREFDES101 through USB USB Connection 1 Connect the watch to the PC with a USB Type C cable or with the Pico ad...

Page 17: ...Maxim Integrated Page 17 of 39 2 Under Scan Mode select Serial over USB Click Scan Figure 15 Scan for devices...

Page 18: ...Maxim Integrated Page 18 of 39 3 Verify that Connected Devices lists ECG TEMP and PPG Figure 16 Successful connection over USB...

Page 19: ...ct Windows BLE Click Scan 2 Select the device with the MAC address that matches the MAC address listed on the watch info screen Click Connect Figure 17 BLE device selection 3 Verify that Connected Dev...

Page 20: ...e on board flash Data is not streamed to the GUI while Flash Logging is enabled 4 Select the desired filters 5 Adjust the ECG parameters The default parameters can be used for the first time Refer to...

Page 21: ...Maxim Integrated Page 21 of 39 Figure 20 ECG measurement sample...

Page 22: ...Kit 2 Check the box for Log to File to save the data 3 Check the box for Log to Flash to save the data to the on board flash Data is not streamed to the GUI while Flash Logging is enabled 4 Select the...

Page 23: ...for Accelerometer Chart to plot the accelerometer data 5 Check the box for Algorithm Data to see the algorithm data HR bpm HR Confidence and Activity 6 Select Raw mode to manually set the AFE setting...

Page 24: ...Maxim Integrated Page 24 of 39 Figure 23 PPG measurement sample...

Page 25: ...sources other than the Google Play Store 2 Download the Android Eval Pack using the web browser on the Android device from the Software section on the MAXREFDES101 Design Resources tab 3 Open Download...

Page 26: ...d and open the Android application Select Scan to detect nearby devices Figure 25 Available Devices list 2 Tap the device with the MAC address that matches the MAC address listed on the watch info scr...

Page 27: ...ner and check Log to File to save data to a file 4 Tap the button in the top right corner and check Log to Flash to save data to the on board flash Data is not streamed to the app while Flash Logging...

Page 28: ...d select YES to use the default setting 7 Wear the watch on the wrist and make sure the skin has direct contact with electrodes 2 and 3 Then place a finger from the opposite hand on electrode 1 8 Tap...

Page 29: ...save data to a file 3 Tap the button in the top right corner and check Log to Flash to save data to the on board flash Data is not streamed to the app while Flash Logging is enabled 4 Wear the watch...

Page 30: ...ht corner and check Log to Flash to save data to the on board flash Data is not streamed to the app while Flash Logging is enabled 4 Tap the Celsius or Fahrenheit radio button to select the units 5 Ta...

Page 31: ...Maxim Integrated Page 31 of 39 Figure 31 Android app temperature measurement sample...

Page 32: ...Design Resources tab 2 Extract the zip file to a known location 3 Open Device Manager Device Manager can be found in the Control Panel 4 If manual driver installation is needed the MAXREFDES101 appea...

Page 33: ...gure 34 Browse to extracted release package 8 When prompted by the Windows Security window click Install this driver software anyway Figure 35 Choose Install this driver software anyway 9 After the dr...

Page 34: ...watch is still tethered to the PC or Android device flash logging can be stopped by pressing the Stop button in the GUI or app Downloading the Log File After flash logging is complete download and par...

Page 35: ...o be parsed to convert them to a readable csv format 6 In the PC GUI open the Flash Log Parser from the Tools menu 7 Select the maximlog file choose an output folder and click PARSE A csv file is gene...

Page 36: ...Axis Acceleration g Acceleration in z axis in unit of g Heart Rate bpm Heart rate in unit of beats per min HR confidence Heart rate algorithm extraction confidence a threshold confidence 85 is recomm...

Page 37: ...amples are dropped during Bluetooth transmission Raw ECG ECG data count Filtered ECG Filtered ECG data count defined by user s choice of filter setting ETAG 2 0 ECG FIFO data tag see table 48 in MAX30...

Page 38: ...initions TEMP_ csv COLUMN DESCRIPTION Time Time stamp Sample count Data index ranging from 0 to 255 for monitoring if samples are dropped during Bluetooth transmission Temperature C Temperature in uni...

Page 39: ...ons or technology described is intended to suggest possible uses and may be superseded MAXIM INTEGRATED PRODUCTS INC DOES NOT ASSUME LIABILITY FOR OR PROVIDE A REPRESENTATION OF ACCURACY OF THE INFORM...

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