# NRC Buoyancy testing for prototype 1: Floating Pavilion

How to use the .hex files.

Step 1. Download the Teensy Loader Application (https://www.pjrc.com/teensy/loader.html)
Step 2. Open the .hex file that you want to run. (File->Open HEX File)
Step 3. Plug in main board to computer and follow Teensy Loader prompts to load program
Step 4. It's logging to an SD card (if there's one in the Teensy). You can also monitor the Teensy with a serial monitor.

Be sure to record meta-data like which moon board (eg. R2A) is being used. This is needed in order to determine the conversion from unitless ADC integers to floats with proper units.

Teensy Setup

https://www.pjrc.com/teensy/tutorial.html

Connections

Libraries used

• Hologram backend https://github.com/benstr/hologram-SIMCOM
• GPS for timestamps https://github.com/adafruit/Adafruit_FONA
  • please disable the verbose output (comment out line 31 in /libraries/Adafruit_FONA/includes/FONAConfig.h) prior to compiling binary for deployment

Sensor Specifications and conversion equations

Anemometer

Davis 6410
Datasheet

Temperature, main board (TMP20)

Conversion equations

• Parabolic (-55 to 125˚C, ±2.5˚C): T [˚C] = -1481.96 + sqrt(2.1962 10^6 + (1.8639 - V)/(3.88 10^-6))
• Linear (-40 to 85˚C, ±3.15˚C): T [˚C]= (V - 1.8583)/-0.01167

  Accelerometer, main board (ADXL337)

  Conversion equation: a [g] = (V - 1.65)/0.33