+[[!meta title="EasyMini"]]
# EasyMini
This is a small, baro-only recording dual-deploy altimeter for
model rocketry
-EasyMini is available from the [Garbee and Garbee](https://shop.gag.com) web
-store, and should be available from our distributors soon.
+EasyMini version 3.0 is available from the
+[Garbee and Garbee](https://shop.gag.com) web store
+and from our distributors.
-For the latest EasyMini firmware and related ground station software, please
-visit the [AltOS](../AltOS) page on this site. EasyMini requires AltOS
-version 1.3 or later.
+For the latest EasyMini firmware and related ground station software,
+please visit the [AltOS](../AltOS) page on this site. EasyMini
+version 3.0 requires AltOS version 1.9.12 or later.
-These are photos of a prototype version, we haven't take photos of the
-production units yet:
+These are photos of version 3.0:
-<a href="v0.2/easymini-top.jpg"> <img src="v0.2/easymini-top-thumb.jpg"></a>
-<a href="v0.2/easymini-parts.jpg"> <img src="v0.2/easymini-parts-thumb.jpg"></a>
+<a href="v3.0/top.jpg"> <img src="v3.0/top-thumb.jpg"></a>
+<a href="v3.0/bottom.jpg"> <img src="v3.0/bottom-thumb.jpg"></a>
## Features ##
* Barometric pressure sensor good to 100k feet MSL
* Designed to use a battery supplying 3.7V-12V.
* 1.5 x 0.8 inch board designed to fit inside 24mm airframe coupler tube
-* 2MB on-board data logging flash
+* 1MB on-board data logging flash
* Weighs only 6.5g (less than 1/4 oz)
### Developer View ###
* Hardware Features
- * [NXP LPC11U14](http://www.nxp.com/products/microcontrollers/cortex_m0_m0/LPC11U14FHI33.html) System-on-Chip
+ * [NXP LPC11U24](https://www.nxp.com/part/LPC11U24FET48#/) System-on-Chip.
* ARM Cortex-M0 MCU
* 32k Flash
- * 6k RAM
+ * 8k RAM
* USB 2.0
- * 8 12-bit analog inputs
+ * 10-bit analog inputs
* I2C, SPI, async serial
* digital I/O
* [Measurement Specialties MS5607](http://www.meas-spec.com/product/pressure/MS5607-02BA03.aspx) pressure sensor
* Runs from on-chip flash, uses on-chip RAM, stores flight data to
flash memory part
* Tools Used
- * [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout
+ * [lepton-eda](https://github.com/lepton-eda/lepton-eda) for schematic capture
+ * [pcb-rnd](http://repo.hu/projects/pcb-rnd/) for PCB layout
* [GCC](http://gcc.gnu.org/) 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)
[pdf](../AltOS/doc/altusmetrum.pdf) formats
An outline of the board with drill hole locations is available in
-[pdf](../Documents/easymini-outline.pdf) format.
+[pdf](../AltOS/doc/easymini-outline.pdf) format.
Thanks to Bryan Duke, there's also a 3d model of EasyMini available on
[Thingiverse](http://www.thingiverse.com/thing:1946852).
in the project [hw/easymini](http://git.gag.com/?p=hw/easymini;a=summary).
For those who don't have ready access to the gEDA suite, here are pdf snapshots
-of the files for production PCB version 1.0 in more easily readable form.
+of the files for production PCB version 3.0 in pdf format.
-* [schematic](v1.0/easymini-sch.pdf)
-* [pcb artwork](v1.0/easymini-pcb.pdf)
+* [schematic](v3.0/easymini-sch.pdf)
+* [pcb artwork](v3.0/easymini-pcb.pdf)
+* [bill of materials](v3.0/partslist.csv)
+
+## Previous Versions ##
+
+All versions of EasyMini have the same user-visible features and
+specifications, the differences are primarily in the choice of processor which
+has changed over time due to availability.
+
+Easy Mini version 1.0 was the first production version of EasyMini, based on
+the [NXP LPC11U14](http://www.nxp.com/products/microcontrollers/cortex_m0_m0/LPC11U14FHI33.html) System-on-Chip.
+
+Easy Mini version 2.0 was the second production version of EasyMini,
+based on the
+[STM32F042](http://www.st.com/en/microcontrollers/stm32f042f6.html)
+System-on-Chip. This version also moved to a more robust USB connector.
+
+Easy Mini version 1.1 was the third production version of EasyMini. It used
+the more robust USB connector, but went back to the same processor chip as
+version 1.0 due to parts availability.