# TeleDongle

This is an RF interface designed primarily for use as a ground station
interacting with a [TeleMetrum](../TeleMetrum/) altimeter on board a high 
power model rocket.  The primary computer interface is USB, but async serial
and SPI are also available as alternatives.  The RF filter components are
by default set for use in the vicinity of 435 Mhz, but can be altered to
support other frequency ranges.

<img src="v0.2/cimg5556-small.jpg">

## Features ##

### User View ###

* 70cm ham-band transceiver for interaction with [TeleMetrum](../TeleMetrum/)
* USB interface for power, configuration, and data interface
* 4 pin Tyco MicroMaTch connector for debug and flash programming
* 8 pin Tyco MicroMaTch connector supports serial or SPI interface
* 1.1 x 1.1 inch 2-layer board, fits inexpensive Hammond 1551 plastic enclosure

### Developer View ###

* [TI CC1111F32](http://focus.ti.com/docs/prod/folders/print/cc1111f32.html) Low Power RF System-on-Chip
	* Sub-1Ghz transceiver
	* 8051 MCU
	* 32k Flash
	* 4k RAM
	* USB 2.0
	* 6 12-bit analog inputs (11 bits with single-ended sensors)
	* 2 channels of serial I/O
	* digital I/O
* 100mA 3.3V LDO regulator
	* takes input from USB interface by default
	* output appears on 8-pin companion connector
	* can take input from 8-pin companion connector in non-USB applications
* Software Features
	* Written mostly in C with some 8051 assembler
	* Runs from on-chip flash, uses on-chip RAM
	* USB serial emulation for data interface
* Tools Used
	* [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout
	* [SDCC](http://sdcc.sourceforge.net/) compiler and source debugger
* Licenses
	* The hardware is licensed under the [TAPR](http://www.tapr.org) [Open Hardware License](http://www.tapr.org/ohl.html)
	* The software is licensed [GPL version 2](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)

## [Production History](../production) ##

## Artifacts ##

The hardware design current gEDA files are available from 
[git.gag.com](http://git.gag.com) in the project 
[hw/teledongle](http://git.gag.com/?p=hw/teledongle;a=summary).  

For those who don't have ready access to the gEDA suite, here are pdf snapshots
of files in more easily readable form.  

* [schematic](v0.2/teledongle.pdf)
* [pcb artwork](v0.2/teledongle.pcb.pdf)
* [bill of materials](v0.2/partslist.csv)

This board is an integral part of a [TeleMetrum](../TeleMetrum/) system, and
the firmware for both share common elements.  More details, including full 
source code and pre-built packages can be found on the 
[AltOS](../AltOS) page on this site.

## Future Plans ##

An initial batch of TeleDongle v0.2 boards are currently at our assembler.  If
they work as expected, we hope to have TeleDongle for sale in early March 2010.