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longboard_shell_script

Shell Script to be placed in the Linux file system on an Arduino Yún

Do not place these files on a mounted SD card because the Shell Script will not be executable.

The shell script (send_speeds.sh) follows Ash standards (not Bash) due to the Arduino Yún having Ash built in by default.

How To Set Up

  • Before you continue, you should have followed some of the steps from the Arduino GitHub Repo up until this point
  • Change the values listed below under To Use
  • The device details you enter in info.txt should match the device details you enter into the MySQL Table here
  • In order to place these files on the Arduino, you will need a micro SD card
  • First you must format the SD card. This can be done by running the ExpandingYunDiskSpace Arduino Sketch
  • When this has finished, remove the micro SD card from the Arduino
  • Insert the micro SD card into an SD card adapter
  • Insert the adapter into your PC / Laptop
  • Move these files from your PC / Laptop to the micro SD card
  • Remove the micro SD card adapter from your PC / Laptop
  • Remove the micro SD card from the adapter
  • Insert the micro SD card into the Arduino
  • Open the Terminal (Ctrl + Alt + T):
  • Get the local IP Address of the Arduino from the Arduino IDE
  • SSH into the Arduino using the local IP
ssh root@192.168.XXX.XXX
  • Enter the password for root - Default values are arduino (Arduino) or doghunter (Linino)
  • Move into the SD card directory
cd /mnt/sd
  • Copy these files to the folder relative to the Arduino program
cp device_info.txt /usr/lib/python2.7/bridge
cp speeds.txt /usr/lib/python2.7/bridge
cp send_speeds.sh /usr/lib/python2.7/bridge
  • Move to the same directory and make the Shell Script executable
cd /usr/lib/python2.7/bridge
chmod +x send_speeds.sh

To Use

  • info.txt
    • Change {{API_URL}} to the URL of your API
    • Change {{API_KEY}} to the API key
    • Change {{DEVICE_NAME}} to the device's registered name
    • Change {{DEVICE_PASSWORD}} to the device's registered password

How It Works

  • This script is called by the program running on an Arduino Yún (Arduino GitHub Repo)
  • The script reads in the device name, password and the API URL and key from info.txt
  • The speed logs from the skate session are read in from speeds.txt
  • These values are stored in a comma-separated string (which will be turned into an array in the API)
  • Every log is checked if it has been prepended with d_ which signals that this log represents the total distance of the skate
  • A JSON object is created, containing:
    • The API key
    • The device name
    • The device password
    • The speed logs
    • The total distance
  • The script sends the JSON object to the API via cURL/POST and awaits the response