+[[!meta title="TeleMetrum"]]
# TeleMetrum
This is a recording dual-deploy altimeter for high power model rocketry
-with integrated telemetry link.
-
-## 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!
-
-<a href="rawfront.jpg"> <img src="rawfront-thumb.jpg"></a>
-<a href="rawback.jpg"> <img src="rawback-thumb.jpg"></a>
+with integrated GPS and telemetry link.
+
+For the latest TeleMetrum firmware and related ground station software, please
+visit the [AltOS](../AltOS) page on this site.
+
+These are photos of production version 3.0:
+
+<a href="v3.0/telemetrum-v3.0-th.jpg"> <img src="v3.0/telemetrum-v3.0-th-thumb.jpg"></a>
+<a href="v3.0/telemetrum-v3.0-smt.jpg"> <img src="v3.0/telemetrum-v3.0-smt-thumb.jpg"></a>
+
+v3.0 was introduced in late 2019, and is now available for sale.
## Features ##
* Recording altimeter for model rocketry
* Supports dual deployment (can fire 2 ejection charges)
* 70cm ham-band transceiver for telemetry downlink
-* Primary operations based on pressure sensor
-* Temperature sensor
-* 1-axis high-g accelerometer for motor characterization
+* Barometric pressure sensor good to 100k feet MSL
+* 1-axis 200-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
-* Designed to fit 29mm airframe tube
+* Uses LiPo to fire e-matches, can be made to support separate pyro battery
+* 2.75 x 1 inch board designed to fit inside 29mm airframe coupler tube
### Developer View ###
-* TI CC1111F32 Low Power RF System-on-Chip
- * Sub-1Ghz transceiver
- * 8051 MCU
- * 32k Flash
- * 4k RAM
- * USB 2.0
- * analog, digital, and serial I/O
-* Microchip 25LC1024 CMOS serial EEPROM
- * 128k x 8
- * SPI interface
-* Various Sensors
- * Freescale MP3H6115A pressure sensor
- * Freescale MMA2202EG 50g accelerometer. Can use 40-200g variants!
- * Microchip MCP9700A temperature sensor
-* Software Features (planned)
- * Written mostly in C with some 8051 assembler
- * Runs from on-chip flash, uses on-chip RAM, stores flight data to
- serial EEPROM chip
+* Hardware Features of v3.0
+ * ST Micros [STM32L151](http://www.st.com/internet/mcu/product/248821.jsp) ARM Cortex M3 based Microcontroller
+ * TI [CC1200](http://www.ti.com/product/cc1200) Low Power, High Performance RF Transceiver
+ * 150mA 3.3V LDO regulator
+ * [Winbond W25Q64CV](http://www.winbond.com/hq/enu/ProductAndSales/ProductLines/FlashMemory/SerialFlash/W25Q64CV.htm) serial flash memory
+ * [u-blox](http://www.u-blox.com/) MAX-8Q GPS receiver
+ * on-board passive patch antenna
+ * async serial interface
+ * Measurement Specialties [MS5607](http://www.meas-spec.com/product/t_product.aspx?id=8499) Micro Altimeter Module
+ * Wide range — 120kPa to 1kPa (approximately -1500m to 31000m)
+ * High precision — 2.4Pa resolution (approximately 20cm at sea level)
+ * Factory calibrated.
+ * Analog Devices [ADXL375](https://www.analog.com/en/products/adxl375.html) 3-Axis Digital MEMS Accelerometer
+ * +- 200g full-scale
+ * on-chip digitizer
+* Software Features
+ * Written mostly in C with some ARM assembler
+ * Runs from on-chip flash, uses on-chip RAM, stores flight data to serial flash
* USB serial emulation for "console" interface
- * USB mass storate emulation for data recovery
* Tools Used
- * [gEDA](http://geda.seul.org/) for schematic capture and PCB layout
- * [SDCC](http://sdcc.sourceforge.net/) compiler
- * [FreeRTOS](http://www.freertos.org/) kernel
+ * [Lepton EDA](https://github.com/lepton-eda/lepton-eda) for schematic capture
+ * [pcb-rnd](http://repo.hu/projects/pcb-rnd/) for PCB layout
* Licenses
- * The hardware is licensed under the TAPR OHL
- * The software is licensed GPL version 2
+ * 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)
-## Problems ##
+Compared with v2 series, v3 includes a better GPS (uBlox v8 vs v7),
+the TI CC1200 radio used in our other products instead of the CC1120
+used only in TeleMetrum v2 (more or less the same performance, but one less
+device driver for us to have to worry about!), and more accelerometer
+range with approximately the same precision.
-* The CC1111F32 is a 36-pin QFN package, which necessitates reflow soldering.
+## Videos ##
-* 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!
+There are a number of TeleMetrum customer and other
+[videos on YouTube](http://www.youtube.com/results?search_query=telemetrum)
## Artifacts ##
-The hardware design current gEDA files are available from
-[git.gag.com](http://git.gag.com).
-
-As of 1 January 2009, the parts and stencil for v0.1 have arrived, and
-we're waiting for the raw PC boards! Stay tuned for updates, and note that
-Bdale will be giving an update in his session at Linux Conference Australia
-in late January...
+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.
+
+An outline of the board with drill hole locations is available in
+[pdf](../Documents/telemetrum-outline.pdf) format.
+
+This board was designed using lepton-eda and pcb-rnd.
+
+The hardware design 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).
+
+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 'v3.0' document what we're actually flying
+on the respective PCB revisions.
+
+For those who don't have ready access to the gEDA suite, here are pdf snapshots
+of the files for Production PCB version 3.0 in more easily readable form.
+
+* [schematic](v3.0/telemetrum-sch.pdf)
+* [pcb artwork](v3.0/telemetrum-pcb.pdf)
+* [bill of materials](v3.0/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!
+
+## [History of TeleMetrum](history) ##
projects / web / altusmetrum / blobdiff