Every time I fly and have to drop off my luggage at the check-in counter, I wonder what goes inside it during the trip.
- Is it stored in a cold location? At high altitudes, external plane temp can reach -30F. Is my stuff exposed to that extreme weather?
- Does it gets opened when I’m not around? As far as I know only customs and security have permission to open the luggage; no one else.
- What about being dropped? Throw a few feet is probably expected, but how about a 3-meter free fall? Not cool!
To answer those question I decided to create a small device that I could place in my luggage and record some environmental data around it. The idea for OpenLoggage was born!
I have decided to make it an open-source hardware and software project. For several reasons:
- get the community to collaborate on the application software
- have fun in this project!
Check out these slides I put together and presented at an Arduino Minnesota meeting in March 2014. It shows a bit more about the project:
Proto1 – Credit Card size
This was the first OpenLoggage board. It’s credit card sized.
It was used to test out all the subsystems. After all is tested, I created proto board 2 where all has been shrunk down.
Here’s what it looks like.
Proto 2 – Gum Stick size
As you may imagine by the name of this board, the Gum Stick board has the size of a standard stick of chewing gum: 2-7/8 inches in length, 7/8 inch in width.
The GS board is the second board I made. The first board was a credit card size and was done that big so that I could quickly test out components, cut traces, etc.
Funny fact: there’s a Military Standard for chewing gum sticks.
- Microcontroller: Atmel’s ATMEGA328 (same as in the Arduino Uno)
- MicroSD card socket
- Coin cell battery holder
- Li-ion charging circuit
- Sensors: temperature, light (LDR)
- Size: standard chewing gum stick (xx , yy )
- two unused I/O pins for expansion
- Very low energy design!!! (see slides above)
- Jumpers for selecting power source (USB, Li-Ion or Coin Cell)
I added these headers as an alternative of populating the components directly in the b
- Header for Arduino Mini (? double check) in case you do not want to hand solder the SOIC chip on the board.
- Header for RFduino (p/n xxxxyyyy). Easily add Bluetooth 4.0 (BLE) to your board.
- Header for Accelerometer board (p/n GY-45 with Freescale MMA8451)
- Header for RTC clock (p/n xxxxyyyy)
Circuit Board Layout
- Download Gerber files
- Eagle Cad schematic & layout (coming soon)
- Sample Sketches & Library (to be ported from Proto1 board)
Plans for OpenLoggage:
(this section is my to-do list for this project. As time allows, I’ll work on the items below. If you’re interested in OpenLoggage, then check back soon)
- Publish Finish BOM & order parts (done)
- Design: Finalize schematic (done)
- release code, schematics, and BOM
- add a forum for users to discuss features, how-to, etc
- Get a better logo. Temporary logo below: