"from few time i am working on arduimu+ v3. trying to use dmp. also pulled code from master channel. but that is in quite early stage. i am working on yaw angle(as i am working auto car). i would like to commit to dev channel. thanks"

"Did you change the interrupt from 6 (in the demo) to 0 as it was in the original ImuV3 example? If not, you likely never get new data notification.... Thanks, Andrew"

"No, you need to install libraries into location specified in 'scetchbook location' field of arduino's preferences. In mu case it is C:\Users\Andrew\Documents\Arduino.   Just take a look to preference dialog…"

"I have downloaded the arduimu archive http://ardu-imu.googlecode.com/files/ArduIMU_1.8.2.zip and verified that this change compiles fine. So, I am curious why it does not work in your case... Just to verify, I use arduino-022 to build the arduimu…"

"To build IMU code with this fix, I have used MTK GPS class from ArduCopter libraries (http://arducopter.googlecode.com/svn/trunk/libraries/AP_GPS). What version of libraries do you use?   Thanks, Andrew"

"There is MTK firmware newer than 1.6? Could you please point where it is available?   Thanks, Andrew"

"Hello Evan,    Let's clarify that we are using same sources for arduimu and libraries,  because this compilation error seems to be caused by old library code.    I use arduimu code from following repository:   URL:…"

"  I have even better solution for the problem: instead of introducing any artificial checks for gps coordinates validity on AP side, we can force ArduIMU to re-translate only valid gps data by a one-line change in Output.pde.   The line…"

"I use reset button on the AP board (I do not use the shield at the moment), an this approach works fine.   I will test the fix in GPS_join_data() tomorrow: it seems to be a bit more convenient if there will be no need to do reset…"

"Hello Evans,    I use exactly same configuration: ArduPilot + ArduIMU + MTK gps,  and kind of home-brewed OSD to visualize ArduPilot output.  Sometimes I observe the same behavior: solid blue led on AP board  (what indicates…"

"In order to get ArduPilot_2_8 compiled with GPS_PROTOCOL_IMU, I needed to make following changes: * add gps driver initialization to lines 54 -57: #elif GPS_PROTOCOL == GPS_PROTOCOL_IMU       …"

"The IMU's nmea parser seems to be based on the parser from ArduPilot sources, which now works fine (at least in the case of LS20031 module). So, you may want to adopt current version of AP's nmea parser for IMU needs..."

"Hi Matthew, I am very interested in your investigation, because I also have LS20031 module and I am going to use it with ArduIMU board. Is it possible that 2.5v is too low voltage? The LS20031 spec says that minimum input voltage is 3v. You could…"

"attitude.pde, lines 24 - 45"

"If current set of PID gains works fine in stabilization mode, then you can move to FBW mode. You have no airspeed sensor, so you should use FBW_A. Thanks, Andrew"