Wireling Healthy Kit Tutorial
If you backed the Wireling Kickstarter for the Healthy Kit, there is ALREADY code loaded onto the TinyScreen+ processor. To see what it does, follow this scheme for plugging in the Wirelings to the Adapter TinyShield:
To assemble the kit, plug in the rechargeable battery to the battery port. (You may need to charge the battery - to do so just plug it into the TinyScreen+ and plug the the TinyScreen+ into a power source using a MicroUSB cable.) Then attach the Wireling Adapter TinyShield, and MicroSD TinyShield with microSD card inserted. Plug in the Pulse Sensor to Port 0, and the 9-Axis Sensor to Port 3 on the Wireling Adapter TinyShield.
How it Works
Getting Pulse Readings
To get the best results from your Pulse Sensor Wireling, place the Pulse Sensor Wireling flat on a surface, and then place the top pad of a finger on top of the red LED. Place your finger steadily and gently onto the sensor so that it is in a comfortable resting position. You should see some data feedback, but every finger is different so you may need to move it around, or try different amounts of pressure (but not too much!) until you see some steady pulses from the graphic. Once you get the hang of how the sensor reads, you can try using it on different places, like your wrist.
Calibrating the Compass
You will need to go to the "Calib Compass" setting. This section of the setting menu (described more below) will display the X, Y, and Z-axis readings from the 9-Axis Sensor. To calibrate the compass, move the individual sensor around to give it a full range of readings. After calibration, keep the sensor away from any metal as this will skew the sensor readings. Close out of this part of the menu to the main screen to test how well you calibrated the compass.
Settings / Logging Data
The Healthy Kit program has several settings that make it customizable.
Once everything is hooked up correctly, you should be be able to power the unit on. (If you see a static image that covers the screen, make sure everything is plugged in correctly and try power cycling the TinyScreen+) When the Healthy Kit program first comes up on the TinyScreen+, you should see a screen that shows compass data, a step counter, temperature, and a graph of the data being read by the pulse sensor:
From here, you can click the lower-left button to go into the settings Menu and change any of the following using the arrow buttons noted on the screen:
Time & Date
- This menu allows you to set the date and time so that all the data that is saved to the attached SD Card has a timestamp so that you can reference specific points in time.
- The total scale of brightness ranges from 0-15
- Brightness is initially set to: 0008 - which is about 50% brightness. Keeping the brightness low, as with any electronic, will help you save battery life.
- Once this option is selected, it will open to a screen that shows the raw sensor values read from the magnetometer (this is a part of the 9-Axis Sensor.) The magnetometer data can be calibrated by opening to this menu and moving the sensor around in every direction to give the sensor a range of values to best calibrate direction. (This make seem silly, but it is the best way to get effective data.)
- You should be able to see the compass icon from the main menu and verify that it it working better after some calibration. The arrow on the circle should spin around as you spin the unit around.
- Important: After calibrating the compass data, you should keep the 9-Axis Sensor away from any metal as this could tamper with its calibration and produce faulty readings
- The temperature read from the 9-Axis sensor may not perfectly match the ambient temperature, so this menu option is used for offsetting the temperature to be lower than what it is currently reading. Say the temperature being output on the home-screen is 80°F, but you know that the actual temperature is 77°F where you are, to offset the temperature correctly you would input 0003 to the offset menu.
- This will reset the step counter (viewable on the main screen) to zero when selected.
Going back the home-screen, you can then navigate to the Log Menu using the lower-right button in order to access a few more options:
- Press this option in order to start logging (This will generate a new .csv file that begins logging data at the input interval - default is every second, and can be changed with the Log Interval option)
- Press this to stop a logging session - this will end a .csv file of your log that was started with the Start Logging menu option
- This is by default set to 1 second, and can be changed to match whatever frequency is desirable to you. This is the rate at which sensor data (like the count of steps, and BPM) are written to the SD Card and saved.
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