TeleTerra is a hand-held ground station for TeleMetrum.
These are photos of our first cut prototype hardware:
While using a TeleDongle board as a USB to RF interface to a notebook computer works splendidly, we think it would be cool to have a nice hand-held ground station we can use in full sunlight on the flight line. If it can help locate the rocket and is easy to carry during recovery operations, so much the better!
- Hand-held unit about the size of a calculator
- 4 line by 20 character text LCD
- "joyswitch" for user input (up, down, left, right, push)
- Antenna connector for the telemetry stream from TeleMetrum
- Integrated GPS receiver and antenna to allow display of current user position, and relative position of GPS-equipped rockets
- Audio amplifier and speaker for voice status updates
- Integrated rechargable battery
- USB interface for configuration, power, and flight log extraction
- Single circuit board
- 2Ah LiPo battery for all-day use
- Software Features (planned)
- AltOS for the cc1111 and simple C for the AVR
- Tools Used
- gEDA for schematic capture and PCB layout
In 2010, two v0.1 prototypes were assembled, and the hardware was tested.
Unfortunately, this design turned out to be too expensive to manufacture and sell. We then worked on a cost-reduced v0.2 design, which worked ok, but just wasn't very satisfying to use compared to a TeleBT and Android device. It's possible we'll come back to TeleTerra at some point in the future.