Differences

This shows you the differences between two versions of the page.

--- misc:hacks:gps [2014-01-06 12:00]
macke
+++ misc:hacks:gps [2015-07-15 16:31]
127.0.0.1 external edit
@@ Line 2: / Line 2: @@
-====== What you need ======
+===== What you need =====
   * u-blox MAX-7 GPS breakout (we have [[http://ava.upuaut.net/store/index.php?route=product/product&path=59_60&product_id=52|one from HAP Supplies]])
   * KDE Marble built with Python bindings
-====== How to get it working ======
+===== How to get it working =====
-These instructions are valid for Ubuntu 13.10 but similar steps should work with other OSes.
+These instructions are valid for Ubuntu 13.10 but similar steps should work with other distros.
   * Attach the u-blox beakout to the expansion header by connecting the following pins (breakout -> Crazyflie expansion header):
@@ Line 14: / Line 14: @@
     * TXD -> TX (pin 5)
     * RXD -> RX (pin 3)
-  * Since the Python bindings for Marble isn't built by default you will have to build Marble from source and enable these (instructions taken from [[http://techbase.kde.org/Projects/Marble/MarblePythonInstructions|here]]
+  * Since the Python bindings for Marble isn't built by default you will have to build Marble from source and enable these (instructions taken from [[http://techbase.kde.org/Projects/Marble/MarblePythonInstructions|here]])
 <code>
-sudo apt-get install python-sip-dev python-qt4-dev
+sudo apt-get install python-sip-dev python-qt4-dev kdelibs5-dev python-kde4
 git clone git://anongit.kde.org/marble.git ~/marble/sources -b KDE/4.12
@@ Line 25: / Line 25: @@
 sudo make install
 </code>
-  * Make sure you have the correct firmware/software
+  * Make sure you have the correct firmware/software (the firmware is on the [[https://github.com/bitcraze/crazyflie-firmware/tree/gps_ublox_dev|gps_ublox_dev]] branch and the client is on the [[https://github.com/bitcraze/crazyflie-clients-python/tree/gpstab|gpstab]] branch)
-====== Tweaking and development ======
+===== Tweaking and development =====
-There's no assisted GPS or battery backup so every time the Crazyflie is powered on the GPS module does a cold-start, which means that it takes at least ~30 seconds to get a fix. This will be improved in the future.
+There's no assisted GPS or battery backup so every time the Crazyflie is powered on the GPS module does a cold-start, which a while to get a fix. During ideal conditions it should be 42 seconds (according to datasheet) but during testing we have seen times closer to 4-6 minutes. The plan is to improve this in the future by implementing assisted GPS (downloading almanac on the PC and transferring via CRTP).
 Getting a position fix will not be as easy as with your phone, so make sure to be outside (or at least stick the Crazyflie a couple of meters outside the window).
 If you don't have a GPS module you can still use the [[projects:crazyflie:pc_utils:debugdriver|DebugDriver]] which will send fake latitude/longitude/altitude to the UI.

Bitcraze Wiki

User Tools

Site Tools

Differences

Page Tools