3 This is an RF interface designed primarily for use as a ground station
4 interacting with a [TeleMetrum](../TeleMetrum/) altimeter on board a high
5 power model rocket. The primary computer interface is USB, but async serial
6 and SPI are also available as alternatives. The RF filter components are
7 by default set for use in the vicinity of 435 Mhz, but can be altered to
8 support other frequency ranges.
10 Production units are not currently available, but we hope to make more soon.
12 For the latest TeleDongle firmware and related software, please
13 visit the [AltOS](../AltOS) page on this site.
15 <img src="v0.2/cimg5556-small.jpg">
21 * 70cm ham-band transceiver for interaction with [TeleMetrum](../TeleMetrum/)
22 * programmed for 38k4 GFSK data rate with forward error correction
23 * USB interface for power, configuration, and data interface
24 * 4 pin Tyco MicroMaTch connector for debug and flash programming
25 * 8 pin Tyco MicroMaTch connector supports serial or SPI interface
26 * 1.1 x 1.1 inch 2-layer board, fits inexpensive Hammond 1551 plastic enclosure
28 ### Developer View ###
30 * [TI CC1111F32](http://focus.ti.com/docs/prod/folders/print/cc1111f32.html) Low Power RF System-on-Chip
31 * Sub-1Ghz transceiver
36 * 6 12-bit analog inputs (11 bits with single-ended sensors)
37 * 2 channels of serial I/O
39 * 100mA 3.3V LDO regulator
40 * takes input from USB interface by default
41 * output appears on 8-pin companion connector
42 * can take input from 8-pin companion connector in non-USB applications
44 * Written mostly in C with some 8051 assembler
45 * Runs from on-chip flash, uses on-chip RAM
46 * USB serial emulation for data interface
48 * [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout
49 * [SDCC](http://sdcc.sourceforge.net/) compiler and source debugger
51 * The hardware is licensed under the [TAPR](http://www.tapr.org) [Open Hardware License](http://www.tapr.org/ohl.html)
52 * The software is licensed [GPL version 2](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
54 ## [Production History](../production) ##
58 There is a single manual for all Altus Metrum products,
59 which is available in [html](../AltOS/doc/altusmetrum.html) and
60 [pdf](../AltOS/doc/altusmetrum.pdf) formats.
62 The hardware design current gEDA files are available from
63 [git.gag.com](http://git.gag.com) in the project
64 [hw/teledongle](http://git.gag.com/?p=hw/teledongle;a=summary).
66 For those who don't have ready access to the gEDA suite, here are pdf snapshots
67 of files in more easily readable form.
69 * [schematic](v0.2/teledongle.pdf)
70 * [pcb artwork](v0.2/teledongle.pcb.pdf)
71 * [bill of materials](v0.2/partslist.csv)
73 This board is an integral part of a [TeleMetrum](../TeleMetrum/) system, and
74 the firmware for both share common elements. More details, including full
75 source code and pre-built packages can be found on the
76 [AltOS](../AltOS) page on this site.
80 We hope to return TeleDongle to production soon.