User Instructions

Pairing one or more sensors to circuit

One sensor

StretchSense silicone stretch sensor

Multiple sensors

StretchSense breakout cable and adaptor

Using the App

The Apps are available to download for free on the Google Play Store.

StretchSense App lineup

Instructions for Enterprise Kit App

  • Select the Sensor mode from the main menu. Press the Bluetooth symbol in the App. Select the entry named “StretchSense#####” where the ##### are the five digits of the serial number on the sensing circuit. 
  • Once the sensor is connected, the graph in the App will respond to stretching and deformation of the sensor.
  • To start recording data from the sensor, press the save symbol in the App. The App will begin to record capacitance versus time as measured by the sensor. To stop recording, press the save symbol again.
  • To retrieve recorded data, connect your Android device to a computer by USB. Ensure that your Android device is enabled as a USB media device. On your computer, browse to the directory of your Android device. Recorded data will be saved in a folder titled “StretchSense Data”.
  • The data is stored in a comma separated value (.csv) file, in pairs of Capacitance (in picoFarads), and Timestamp (in milliseconds).

Instructions for Fabric Evaluation Kit App

  • Press the activation button on the case. After pressing the button, you should observe a light flashing within the sensor. This indicates that the sensor is ready to be paired to the App.
  • Press the Bluetooth symbol on the action bar at the top of the App. Select the entry named “StretchSense” in the available devices list. If no devices appear, press the button on the sensor again and press “Scan” in the App.
  • Once the sensor is connected, the bar graph in the App will respond to stretching and deformation of the sensor.
  • Tap on the graph in the App to change its scale. Minimum and maximum can be specified in picoFarads. The graph can be set to scale automatically by setting the Min to the far left, and the Max to the far right.
  • To retrieve recorded data, connect your Android device to a computer by USB. Ensure that your Android device is enabled as a USB media device. On your computer, browse to the directory of your Android device. Recorded data will be saved in a folder titled “StretchSense Data”.
  • The data is stored in a comma separated value (.csv) file, in pairs of Capacitance (in picoFarads), and Timestamp (in milliseconds).