# TeleMetrum
This is a recording dual-deploy altimeter for high power model rocketry
-with integrated telemetry link.
-
-<a href="loadedpair.jpg"> <img src="loadedpair-thumb.jpg"></a>
-<a href="rawfront.jpg"> <img src="rawfront-thumb.jpg"></a>
-<a href="rawback.jpg"> <img src="rawback-thumb.jpg"></a>
-
-## Motivation ##
-
-Bdale and Keith both own
-[BeeLine](http://www.bigredbee.com/BeeLine.htm)
-trackers from
-[Big Red Bee](http://www.bigredbee.com), and are pretty happy with them.
-They use a PIC processor and a TI CC1050 transmitter chip, and
-operate in the ham radio 70cm band.
-
-One weekend while attending a conference together, we got to wondering if
-we couldn't adapt one to use as a downlink for the
-[AltusMetrum](../AltusMetrum/) altimeter board in addition to direction
-finding after flight. That caused us to start thinking about other things
-in the design we might want to tweak, and before long we were working on the
-design of a new tracker board derived from the BeeLine design.
-Another friend at the same conference showed us a board he was working on
-using a different part in the same TI series, that integrated a transceiver
-and CPU on the same chip.
-It didn't take us long to realize that with such a part we could combine and
-simplify things by building a new altimeter with integrated RF link!
+with integrated GPS and telemetry link.
+
+Production units are available from the
+[Garbee and Garbee](http://auric.gag.com) web
+store. TeleMetrum starter kits are also available from
+[Apogee Components](http://www.apogeerockets.com/Altus_Metrum_GPS.asp)
+and [Australian Rocketry](http://www.ausrocketry.com/shop/index.php?main_page=product_info&cPath=111&products_id=4302).
+
+For the latest TeleMetrum firmware and related ground station software, please
+visit the [AltOS](../AltOS) page on this site.
+
+These are photos of our current production version:
+
+<a href="v1.1/telemetrum-v1.1-thside.jpg"> <img src="v1.1/telemetrum-v1.1-thside-thumb.jpg"></a>
+<a href="v1.1/telemetrum-v1.1-smtside.jpg"> <img src="v1.1/telemetrum-v1.1-smtside-thumb.jpg"></a>
## Features ##
* Supports dual deployment (can fire 2 ejection charges)
* 70cm ham-band transceiver for telemetry downlink
* Barometric pressure sensor good to 45k feet MSL
-* Temperature sensor
* 1-axis high-g accelerometer for motor characterization
+* On-board, integrated GPS receiver
* On-board non-volatile memory for flight data storage
-* Serial port for attachment of GPS module
* USB for power, configuration, and data recovery
* Integrated support for LiPo rechargeable batteries
-* 2.5 x 1 inch board designed to fit inside 29mm airframe coupler tube
+* Uses LiPo to fire e-matches, can be factory modified to support separate pyro battery
+* 2.75 x 1 inch board designed to fit inside 29mm airframe coupler tube
### 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
-* [Microchip 25LC1024](http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en520389) CMOS serial EEPROM
- * 128k x 8
- * SPI interface
-* Various Sensors
+* Hardware Features
+ * [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
+ * [Winbond W25Q16](http://www.winbond.com/NR/exeres/A3D21C82-A0B6-4586-A770-2F0883A805FF.htm) serial flash memory
+ * 2M x 8
+ * SPI interface
+ * [SkyTraq](http://www.skytraq.com.tw/) Venus634FLPx GPS receiver
+ * on-board [Taoglas AP.17A.01](http://www.taoglas.com/antennas/GPS_Antennas/Internal_GPS_-_Active_Patch_Modules/)
+ single-stage active patch antenna
+ * U.FL connector with 3.3V DC can be re-purposed for optional external amplified antennas
+ * async serial interface
* [Freescale MP3H6115A](http://www.freescale.com/webapp/search.partparamdetail.framework?PART_NUMBER=MP3H6115A6U) pressure sensor
* [Freescale MMA2202EG](http://www.freescale.com/webapp/search.partparamdetail.framework?PART_NUMBER=MMA2202EG) 50g accelerometer. Can use 40-200g variants!
- * [Microchip MCP9700A](http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en027103) temperature sensor
-* Software Features (planned)
+* Software Features
* Written mostly in C with some 8051 assembler
* Runs from on-chip flash, uses on-chip RAM, stores flight data to
- serial EEPROM chip
+ serial DataFlash chip
* USB serial emulation for "console" interface
* Tools Used
* [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout
* 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) ##
+## [Production History](../production) ##
## [Flight Logs](flightlogs) ##
-## Problems ##
-
-* The CC1111F32 is a 36-pin QFN package, which necessitates reflow
- soldering. Since we needed to reflow solder anyway, and because TI used
- them in their reference design, we went a little crazy and used 0402
- passive parts everywhere. That means working under a microscope to
- place parts! Without an inspection microscope, loading and testing these
- boards might be impossible.
-
-* The v0.1 artwork has the USB connector footprint placed wrong, so that the
- connector hangs out over the edge of the board instead of being flush with
- the edge.
-
-* The v0.1 artwork has two issues that require cuts and jumps. The first is
- that we need chip select on the SPI memory. To fix that, we give up the
- ability to put the accelerometer into self-test mode and use that GPIO line
- to pull chip select on the memory. The second is that the igniter sense
- circuits each need a second resistor to complete the voltage divider so our
- 3.3V CPU ADC can read the 5V ejection voltage. This is fixed by changing
- two resistor values, and tacking two additional resistors onto the board
- with jumpers to ground.
-
## Artifacts ##
+There is a single manual for TeleMetrum and all other Altus Metrum products,
+which is available in [html](../AltOS/doc/altusmetrum.html) and
+[pdf](../AltOS/doc/altusmetrum.pdf) formats.
+
The hardware design current gEDA files are available from
[git.gag.com](http://git.gag.com) in the project
[hw/telemetrum](http://git.gag.com/?p=hw/telemetrum;a=summary).
-The 'working-v0.1' tag on the master branch indicates what we're actually
-flying right now. The v0.1 PCB artwork, and schematic updated to include
-the parts Bdale loads for a functional board including the two cuts and jumps
-and two added resistors plus ground leads required as rework. The 'nextcut'
-branch is work towards our next PCB revision. The 'ground' branch has a
-cut-down schematic used to generate the BOM for partially loading boards
-to use in the matching [TeleTerra](../TeleTerra) ground station design.
+Work on the next version proceeds on the master branch, with occasional
+temporary branches created when Bdale is making some major / speculative
+change. Branched with names like 'v0.2' document what we're actually flying
+on the respective PCB revisions. The 'ground' branch has a cut-down schematic
+used to generate the BOM for partially loading v0.1 boards to used on the
+ground. We call the on-the-ground version '[TeleDongle](../TeleDongle)', and
+newer versions have their own PCB design.
For those who don't have ready access to the gEDA suite, here are pdf snapshots
-of files in more easily readable form. These are all as of the working-v0.1
-tag:
-
-* [schematic](telemetrum.pdf)
-* [pcb artwork](telemetrum.pcb.pdf)
-* [bill of materials](telemetrum.bom)
-
-
-We have firmware that is working well enough that we're starting to allow
-TeleMetrum to fire ejection charges. Keith has also written a ground station
-program called aoview that logs telemetry to disk, displays current and max
-values for key parameters during flight, and even includes voice synthesis
-during the flight so that our eyes can stay on the rockets! The source to all
-this is available from [git.gag.com](http://git.gag.com) in the project
-[fw/altos](http://git.gag.com/?p=fw/altos;a=summary). This repository includes
-sources for the firmware, ground station program, and related utilities. Note
-that actually building these sources requires a modifified version of sdcc,
-for which we have not published diffs since they are in the process of being
-accepted upstream. Watch this space for more details.
+of the files for Production PCB version 1.1 in more easily readable form.
+
+* [schematic](v1.1/telemetrum.pdf)
+* [pcb artwork](v1.1/telemetrum.pcb.pdf)
+* [bill of materials](v1.1/partslist.csv)
+
+Rockets we know of flying with TeleMetrum boards have exceeded 50g acceleration,
+been well above Mach 1, and reached altitudes
+greater than 25k feet AGL with great results. Keith's second generation
+ground station program called AltosUI works on Windows, Mac, and Linux systems
+and logs telemetry to disk, displays current and max values for key parameters
+during flight, includes voice synthesis during the flight so that
+our eyes can stay on the rockets, and even includes live display of rocket
+position over moving maps! After flight, altosui can extract the
+complete flight log from TeleMetrum, can display plots of the data from either
+the telemetry received by radio or the onboard flight log, can output a kml
+file for use with [Google Earth](http://earth.google.com), and can also
+output all the flight data as a csv file for easy import to spreadsheet
+programs or other analysis tools allowing you to perform whatever
+custom analysis you can envision! More details on the software,
+including full source code and pre-built packages
+can be found on the [AltOS](../AltOS) page on this site. Feel free to
+download the software and try it before purchasing our hardware!
## Future Plans ##
-Work is underway on a second revision of TeleMetrum with the following changes:
-
-* stretch board length by 0.25 inches
-* adjust USB connector position to be flush with edge of board
-* eliminate beeper
-* eliminate temperature sensor, since baro sensor is already compensated and there's a sensor on the cc1111
-* eliminate serial port connector
-* integrate MN5010HS GPS receiver and chip antenna on-board
-* change debug connector to 4 pin 1.25mm connector as was used for serial port
-* add 7 pin 1.25mm connector for companion board interface
-* use v_lipo as pyro power, eliminating the huge 1000uF capacitor and instead
- adding ballast capacitors on the 3.3V rail to prevent brownouts
-* add a rectangle of silk screen material for improved serial number labeling
-
-We hope to build and fly prototypes of this version in late 2009. If it works
-out as well as we hope, this version may be made available in assembled and
-tested form to others in the rocketry hobby who have expressed interest.
+TeleMetrum v1.2 is back from our assembler and the first batch are being
+prepared for sale, hopefully by Christmas day. The significant user-visible
+change is that we've moved to a 70g accelerometer by default, due to poor
+availability of the part we previously used due to damage to the Freescale
+facility in Sendai caused by the Japan earthquake / tsunami. Full details
+will be posted here when they're available to order.
+
+## Problems ##
+
+* The CC1111F32 is a 36-pin QFN package, which necessitates reflow
+ soldering. Since we needed to reflow solder anyway, and because TI used
+ them in their reference design, we went a little crazy and used 0402
+ passive parts everywhere. That means working under a microscope to
+ place parts! Without an inspection microscope, loading and testing these
+ boards might be impossible.
+
+* The addition of on-board GPS in v0.2 and later boards means that the total
+ power consumption
+ can exceed the rate at which we draw power from the USB interface,
+ particularly when the GPS is in cold start mode. This means a battery must
+ be attached during operation, and also that the battery will only charge
+ effectively from USB when the board is turned off.
+
+## [History of TeleMetrum](history) ##
+
projects / web / altusmetrum / blobdiff