Portable Data Recorder with GPS Device
This page describes how to set up a portable data recorder using a Sodaq board. The goal is to record data from sensors and then upload the data for analysis.
- SODAQ board
- Lithium battery pack with JST connector
- USB Mini-B cable
- Grove cables
- Grove devices:
- Temperature and humidity sensor (DHT22)
- Sound sensor
- Digital light sensor
- UV light sensor
- GPS device
- OLED display
- I2C splitter board
- Connect the sound sensor to A0/A1 (not switched).
- Connect the button to A1/A0 (switched).
- Connect the UV sensor to A2/A3 (not switched).
- Connect the DHT22 temperature and humidity sensor to D2/D3 (not switched)
- Connect the GPS device to D4/D5 (not switched)
- Connect the accelerometer, digital light sensor, and OLED to the I2C splitter. Connect the I2C splitter to SCL/SDA (not switched).
- Connect the battery to the Sodaq board.
- Connect the USB cable to the Sodaq board.
- Turn on the Sodaq board (using sliding on/off switch)
- Send the Portable Data Recorder with GPS sketch to your Arduino.
Be sure to select
PDR / SODAQfrom the microcontroller list.
- Turn on the board.
- Go outside to get a GPS lock. This may take a few minutes.
- Hold down the button for two seconds to begin recording. The OLED display will show the number of records stored in the flash memory.
- If you'd like to see the sensor values, connect to the board using the Arduino Console.
- After your recording is complete, turn the board off and on stop the recording.
- Visit the Arduino Import Tool to retrieve the data from the flash memory.
- Familiarize yourself with the sensors. Look at the values
from the sensors using the sensor plotter.
- Are the numbers what you expect?
- What are the units?
- Which sensors are more stable? Which are more noisy?
- Can you make the sensor values change?
- Walk around the block (of your home or school). Walk around
again immediately and walk around two more times the following
- What kinds of patterns do you expect to see?
- How does the data differ from one walk to the next?
- What kinds of differences do you see within the same day?
- What kinds of differences do you see between days?
- Are some sensors more consistent than others?
- Record your commute (whether by bike, foot, car, bus, etc.).
- What levels of sound and acceleration do you experience?
- How does the temperature, humidity, and light change based on your location?
- What might cause changes in air pollution levels?
- How does the path look on the map?
- Visit a park once a day for two weeks, making measurements
in three locations within the park.
- What changes do you expect?
- Do the locations experience the same change in temperature, humidity, light, and air pollution?
- How does the data compare to online weather data?
- Do a data scavenger hunt.
Here are some other kinds of that you could attach to a portable data recorder: