+[[!meta title="TeleTerra"]]
# TeleTerra
-This is a hand-held ground station for [TeleMetrum](../TeleMetrum/).
+TeleTerra is a hand-held ground station for [TeleMetrum](../TeleMetrum/).
+
+These are photos of our first cut prototype hardware:
+
+<a href="v0.1/teleterra-v0.1-uiside.jpg"> <img src="v0.1/teleterra-v0.1-uiside-thumb.jpg"></a>
+<a href="v0.1/teleterra-v0.1-smtside.jpg"> <img src="v0.1/teleterra-v0.1-smtside-thumb.jpg"></a>
## Motivation ##
-While it is possible to use a partially (or fully!) loaded
-[TeleMetrum](../TeleMetrum/) board as a USB to RF interface, 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
+While using a [TeleDongle](../TeleDongle/) board as a USB to RF interface to
+a notebook computer works splendidly, we thought 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!
## Features ##
### User View ###
-* Hand-held unit about the size of a calculator
-* Antenna for the telemetry stream from [TeleMetrum](../TeleMetrum/)
-* Integrated GPS receiver core to allow display of current user position,
-and relative position of GPS-equipped rockets
+* 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](../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 and power
+* USB interface for configuration, power, and flight log extraction
### Developer View ###
-* Partially populated [TeleMetrum](../TeleMetrum/) board
- * Serial connector used to attach user interface board
- * LiPo charge management
- * Beeper for audible indications
- * RF section with SMA for external antenna
- * USB interface
-* New user interface board
- * [Microchip 16F886](http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en530146) Microcontroller
- * 8k Flash
- * 386 bytes RAM
- * I2C target interface
- * In-circuit programming interface
- * Serial port
+* Single circuit board
+ * equivalent of a [TeleMetrum](../TeleMetrum/) less the sensors
+ * [Atmel ATtiny48](http://www.atmel.com/dyn/products/product_card_v2.asp?PN=ATtiny48) used as an I/O expander
* 4 line, 20 character transreflective text LCD display
- * Switches for scrolling, safe/arm, etc
- * LEDs to indicate current flight mode, etc
-* LiPo battery
-* GPS receiver core attached to serial port on new user interface board
+ * multi-directional switch for user inputs
+* 2Ah LiPo battery for all-day use
* Software Features (planned)
- * Written in PIC assembler
- * Runs from on-chip flash, uses on-chip RAM
+ * [AltOS](../AltOS) for the cc1111 and simple C for the AVR
* Tools Used
* [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout
* Licenses
## Artifacts ##
-As of 26 April 2009, an incomplete schematic exists at
+Schematics and PCB artwork exist at
[git.gag.com](http://git.gag.com) in the project
-[hw/teleterra](http://git.gag.com/?p=hw/teleterra;a=summary).
+[hw/teleterra](http://git.gag.com/?p=hw/teleterra;a=summary).
+
+## Future Plans ##
+
+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, but unlikely, that we'll come back to TeleTerra at
+some point in the future.
projects / web / altusmetrum / blobdiff