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User Guide

The OpenIMU-MiniLogger was programmed to be a user friendly device that let you collect data from GPS, IMU, Barometer and more using the grove expansion.

After opening the device using the power switch on the side, the starting menu will appear with different widgets available. You can navigate through them using the "Next" and "Previous" button and perform their action by selecting one. If you reach the end of one page you can switch page by changing widget again. Each widgets possess their own message telling information about the device. The "Change Menu" button let you move from the starting menu to the configuration menu.

The date and time will be updated once the GPS is fixed. You can see this information in the GPS widget in the starting menu. This only has to be done once or as long as the board is not disconnected from the battery.

Start Acquiring Data

The OpenIMU-MiniLogger offers data acquisation of multiple sensors for a long period of time. To log information from the GPS, make sure it is fixed first.

Logging

  1. Make sure your device is open and there's an SD card in the slots. If no SD card is present, you won't be able to log or to connect your device to external (Red icon).
  2. Select the folder widget to start logging. You should see the logging time at the top of the screen appear and the icon turning blue meaning you are logging.
  3. To stop logging, simply select the same widget again. The icon will get back to its original state and your file will be saved on the SD Card.

Your menu should look like the next picture with the logging time and the ID of your acquisition in your SD card showing at the top.

Transfer File

To process your data using the OpenIMU software:

  1. Plug your device on your computer with a micro USB cable
  2. Select the SD card icon to connect to USB allowing your computer to read the card.
  3. Follow the steps in the OpenIMU project to download and process your data.

Configuration

The OpenIMU-MiniLogger allows changeable configuration for your data acquisition. These parameter can be changed using the ConfigAPP created for this purpose or inside the device itself with the configuration menu:

  1. From the home screen, press the "Change Menu" button to go to the configuration menu.
  2. Different widget are available to change parameters of the IMU:
    1. Sample rate (10,50,100,200 Hz)
    2. Gyroscope range (250,500,1000,2000 dps)
    3. Accelerometer range (2,4,8,16 g).
  3. Select the widget to switch between the possibilities.

The fourth widget tells you the space left on the SD card.

Note: The device is slower when the IMU sample Rate is at 200Hz. Data acquisition is still possible but the refresh rate of the screen will be slower