MultiWii

djrm

Trying to get telemetry set up on the Naze32 FC with the free adapter. I feel like I've spent lots of time so far modding my 9x and just want this "last" part to be a little easier. I have a modded 9x running Open9x with a DIY DHT module modded for telemetry. I'm using a D8R-II Plus RX wi...

djrm

I fixed a similar problem to yours by altering the mixes using the er9x configuration menus. in multiwii conf: #define SERIAL_SUM_PPM ROLL,PITCH,THROTTLE,YAW,AUX1,AUX2,AUX3,AUX4 in er9x menus:# (for mode2 tx): ch01 +100%AIL ch02 +100%ELE ch03 +100%THR ch04 +100%RUD ch05 +100%FULL Switch(ELE) ch06 +1...

djrm

I have found a bug in the telemetry GPS function, both AP messages were sending copies of the BP message giving inacurate GPS locations in the received data. The corrected function is here: static void sendGPS(void) { sendDataHead(ID_LATITUDE_BP); serialize16(abs(GPS_coord[LAT]) / 100000); sendDataH...

djrm

Greetings stanleyy, I'm sorry I have no idea what could be wrong with your board or project, does it work with the stock pre-compiled hex baseflight file? My real reason for my message is to ask if you would please share your IAR project files, I've been meaning to make on myself for a while but hav...

djrm

Here is a simple way to use both a Bluetooth transmitter and Er9x transmitter LCD together using an RS232 Bluetooth adapter, the adapter has pins for the ttl level and the inverted RS232 level serial signals, so combining both a level translator for the RC and the Bluetooth transmitter, they both se...

djrm

Hello Kraut Bob, I forgot to mention that I'm using a BMP085 and HMC5883 breakout boards on a Crius lite FC together with iic GPS all on a 600mm frame with 2836 880kv motors and 30Amp Lulin ESCs all powered by a 3600mAh 50C battery. I'm struggling with tuning the system, it seems I have a vibration ...

djrm

Greetings,
Looking at your screen shots I see that in both the motor values for front and rear are identical. Are you sure the software is properly configured for your copter. I'd suggest that a re-compile and eeprom clear could be needed but I have no idea why.
hth David.

djrm

Greetings I applied your changes to my 2.1 multiwii and can see a noticeable improvement in the alt hold, Thank you. This mod is helping me learn to fly my quadcopter, its still early days for me with a usable system. At present I'm using the new default alt PIDs and am about to try tuning them as s...

djrm

http://www.guardian.co.uk/world/video/2012/jun/05/catcopter-dutch-artist-amsterdam-video

djrm

For development work I am using the free toolchain CooCox IDE and its low cost JTAG board from here: http://www.coocox.org/Index.html

djrm

Unfortunateley I was just about ready to fit it to my frame for testing when I placed it down on my desk and shorted something and it started to smoke. it is completely fried I think the 3v3 shorted to the 12V. Some of the chips went with quite a fuss as it was connected to a lipo at the time. I hav...

djrm

The signal pins show an average reading of approx 4.5V DC, the actual voltage here will depend on the data. I'm sure you know that the FTDI and TTL connectors are one and the same i/o ports, they are just two for convenience. i.e The Tx, Rx, 5V, and Gnd are common to both connectors. If there is no ...

djrm

Regarding the video display problem.
It looks like the video signal is overloading the OSD somehow, perhaps you shouold attenuate the input a little. Does the OSD board have/need a termination resistor, if it were missing this could cause a signal overload.
hth David.

djrm

Jonit wrote:Hi dramida, i tried to measure the voltage between GND and VCC on my Crius board, but it shows 0V ..

There is something wrong here, on my board there is 5V on the VCC terminal. I am using it to supply power to my OSD board.
hth David.

djrm

I have been following this most interesting development, thank you eosbandi. I have installed the latest (r24) software onto my 8MHz pro mini 328 satnav board. it appears to be working well although I cannot attempt to fly it just yet. I found a small problem with the led blinking, it would always b...

djrm

I opened my bluetooth GPS and had a poke around inside and found some test pads one of which had NMEA sentences at 9600 baud so I soldered some wires on and fed them into the FC board and now the gui shows me my location. I had to switch over to PPM so this was a chance to test my RC receiver and al...

djrm

Thanks for the info about the baro reading, I had not studied the code. However I see I have a conversion complete pin connected on my board and I just need to reassign it. It turns out that the error in altitude was due to the high pressure at present, this coupled with my home altitude of only abo...

djrm

Hello dongs, The demo application supplied with the board is not very inspiring, but here it is anyway: http://dl.dropbox.com/u/2678548/Arm/STM32_IMU_main.c If you know how to decode the chinese comments please let me know. Last night I tried the latest MWC windows gui with the STM port and was plea...

djrm

Hello, Thanks dongs for the info and useful reminder to keep the sources under the gpl. The reason Ive used the Coocox IDE and gcc is to keep the project free rather than use one of the commercial compilers. I was also attracted to the CoLink jtag adaptor also because of its low cost as well as beca...

djrm

Greetings Michal, the display preview looks good. I have added a 50 Amp current sensor to my OSD board. The settings were changed as follows: // ACS758LCB-050U-PFF-T 50 Amp unidirectional, 60 mV per Amp sensitivity, 600 mV offset volatile uint16_t offset = 123; //default value 0.6V for single sensor...

djrm

I am interested in the porting MW onto a 32 bit architecture and see this has already been done successfully here by dongs on his own board. With this in mind I have bought from ebay a STM32 board complete with 10 DOF sensos, see here: http://www.ebay.co.uk/itm/180847108943?ssPageName=STRK:MEWNX:IT&...

djrm

Although automatically setting the GPS home position may have some advantages I think it would be wrong to set the GPS home position at every motor arming for a number of reasons. The GPS could have a poor fix especially after having just been switched on, the copter may have landed and been disarme...

djrm

The receiver LED voltage has been fed into the MWC A3 analog input, this is an unused input on my Crius lite FC board. The voltage is being tested as part of the failsafe software. The result is that failsafe now kicks in when the receiver gos off (or out of range). I have called the new analogue in...

djrm

I've opened the receiver, there are two LEDs which light when the signal is good. I'll diode OR them together and feed their output to the spare pin on the 3 pin DC power connector I would then have to modify the MWC software to use this signal to trigger failsafe operation mode. I'm thinking that p...

djrm

Today I decided to check the failsafe operation of my copter and I found it does not work at all. What I did find is that when the receiver has once seen the transmiter signal then it continues to output the same outputs until it receives an update, i.e. if I switch off the transmiter then the recei...

djrm

Greetings Hamburger, your idea is good. There is also another patch version of auto ESC cal software with some more checking for protection here: m This one is only ever activated at power up if the throttle is set to full on. I am looking at these ideas to use in conjuntion with an ESC programming ...

djrm

Hello Federico, My understanding of the software is that it connects all four ESCs to your transmitter (via the ESC ports on the FC) at the same time. This would be a manual process of calibrating the ESCS like you could do if the ESCs were connected diretley to the receiver. I have not tried it but...

djrm

I live to the west of Grenwich, the LCD display of my GPS location was corrupted because the LCD display function could not cope with the negative longitude. While fixing it I took the opportunity to include the satellite count too. The new LCD display has the hemisphere N or S, E or W on the top li...

djrm

And here's another one: m looks like download link hell. do you have a file we can easily download? not trying to install spyware. I have looked at the software from the link above, it contains a version of Multiwii V1.8 with a change to the initOutput function in Output.pde The change alters this ...

djrm

I think you will find that the 5v power supply to the processor is used as reference voltage for the ADC conversion, if you supply the FC with anything other than exactly 5 volts then the ADC measurement will be inaccurate by a proportional amount. So check the supply voltage. hth David.

djrm

Hello I'm no expert, I've only flown my copter a few times and I havent really got the hang of it yet. The PID settings are all 0 in the picture, did you read before taking scrrenshot? Try holding the copter when armed with some throttle to see where it wants to balance. Be careful, wear gloves. Exp...

djrm

Hello,
To me it looks like the buzzer needs to be fed with a frequency signal, not DC. if this is so then it will not work.
Useful looking little board but not for feeding from the buzzer output without software modification.
hth David.

djrm

Hello Fritz, I think the root cause of the problem could be related to the fact that my Arduino mini is only runing at 8 MHz, although it works fine using the wire library at 400KHz I2C. The problem is causing the cycle time to increase which is why I'm looking for an alternative solution. Cheers Da...

djrm

Hello Fritz, I had plenty of difficulty getting the code to work. I had to use this test harness to check the operation of the Arduino mini I2C program before I could get the Multiwii to work. The problem is somewhere in the I2C master functions in the multiwii software. My kludge solution is to add...

djrm

The results of a bit of soldering here, Home made I2C GPS board with magnetometer sensor. I'm still waiting for the Baro chip to arrive to complete the board. http://dl.dropbox.com/u/2678548/Arduino/P1080250.jpg Integrated with Multiwii V2.0 on Crius lite board, yet to be tried in flight but working...

djrm

Greetings, I'm in the process of building an I2C GPS receiver for my Multiwii. During testing I've found what I believe may be a bug in the GPS_fix_home setting section towards the end of the GPS_NewData function. At around line 61 of the pre4 version of the GPS module this line of code "if (rc...

djrm

Hello Hamburger, My reason for adding the values into the editor display was so I could see the values and record them for later if I wanted to restore after software upgrade or something. I was having difficulty with the joystick commands, I dont think the calibrate acc joystick commnad works at al...

djrm

Greetings, I'm a total noob at flying and am trying to get my xcopter trimmed properley, to help doing this I've altered the LCD Configuration software to show and edit the values of accelerometer trim. The problem I had was that I did not know what the current values were, with the LCD editor I can...

djrm

Thanks for posing the source. I've tried building it but the code size just exceeds the limit for the free version of Keil.
Perhaps I can trim it down or port it to IAR for which I have a full license.
Best regards, David.

djrm

Hello dongs, This is my first post on the forum. I'm starting to build a multicopter for the first time, I'm already looking for an upgrade to a multiwii clone I have yet to receive! the stm32 arm looks like a good choice, and the board you bought looks like a suitable inexpensive platform to build ...

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