MultiWii

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and after the first try today with propellors I found out that I really need to stabilise everything but don't know how or where to start. Welcome aboard. You didn't say what the exact problem is. So that is the place to start. I realize that you want the model to be more stable, but some details a...

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The channel order in ER9X was set to match with this:
#define SERIAL_SUM_PPM PITCH,YAW,THROTTLE,ROLL,AUX1,AUX2,CAMPITCH,CAMROLL //For Graupner/Spektrum

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I am using the telemetry for RSSI and flight pack voltage monitoring. The ER9X nicely integrates the FrSky telemetry data so the Tx displays the voltages and provides audible warning alarms. In a nutshell, it is awesome. The D8RSP Rx can provide two external voltage measurements. But the D4FR needs ...

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http://www.rcgroups.com/forums/showthread.php?t=1551599

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Good point, the yaw rate feature is used too. The basic method I use for setting YAW is to start with Rate at 0, adjust the PID's for the required stability performance, and then adjust the YAW Rate value. I rarely tweak the Rate, so out of sight, out of mind.

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I can't speak for the Turnigy V2 Rx, but its near twin sold as the FlySky FS-R6B works just fine with PPM-SUM (but is limited to 6-Channels). So if you have problems with the Turnigy Rx then consider using the FlySky version. BTW, my FlySky 9X Tx is running ER9X software so I setup the channel order...

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If both boards are failing, and you are sure that the wiring is correct, then thoroughly re-read post #1 again + several more times. Read it until it the problems/solutions are clear to you. Regarding what to do, it is summarized in the Fix List section, reprinted as follows: I2C Hardware Fix List /...

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Had two boards (Paris V3) with genuine WM+ and NK running ok. I upgraded to the latest 1.9 and it seemed ok. No debug errors noticed on short tests. {snip} But now the board won't run up the gyro or acc on the gui. Since it was working, the newly observed failure may be a bad solder connection or i...

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Thanks for the warning. Too much good stuff crammed into a small package. Code space relief is possible by using the EagleTree ALT-V4 baro sensor. I don't recall the exact amount of Flash mem reduction, but it was well over 1K byte. It's a very good baro sensor too, so other than the $40USD hit to t...

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Reduce Yaw PID values in the GUI.

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I got the code uploaded to the board, but now there is no response from the board to the GUI. DEBUG 2 is crazy much greater than zero. Any ideas?? Just a guess, but perhaps you didn't enable the correct sensors? What I mean is that the source code's config.h file must be edited by *you* so that the...

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The RAW input goes to the input of the PROMINI's internal 5V low dropout VReg. This is the recommended Power input for the CPU board. Even with the internal 5V VReg, it is still compatible with a 5V external supply. If you connect to the PROMINI's Vcc pin you will be applying external voltage to the...

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this is my error now when I try to compile the 1.9 code. core.a(HardwareSerial.cpp.o): In function `__vector_19': With MWC V1.9 you cannot use the V1.0 Arduino IDE. You need the older IDE version 0022 (I also hear that 0023 is compatible, but have not used it). 1. Go to m 2. Find the "Previous...

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But when trying to upload the 1.9 software ther are multiple errors. First one "expected unqualified-id before 'public' Any suggestions? Do you mean you see this error when you upload V1.9? MultiWiiConf_1_9:-1: error: expected unqualified-id before 'public' If so, then you've loaded the wrong ...

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In your case, yes, it is most likely ths value is related to the altimeter/alt hold functionality. Indeed, it is the raw baro altitude (without ACC Z estimation). It can be used by developers to troubleshoot the baro sensor code. The only important debug value in V1.9 is debug2. It should remain 0 ...

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The general goal of short cycle times is to promote the highest sensor update rate. But reading a sensor every forth cycle is sort of like increasing its cycle time 4X. No doubt some models, sensors (and pilots) may not experience performance issues if the sensor data is not updated very often. But ...

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the simplest would be to force processor at 16MHz, but I am afraid can't be done... 168-10MU, single cell lipo power, requirements I can't change. Am I wrong and is this possible ? It sounds like you have decided to use the 8MHz CPU and will change the MWC code. However, if this does not work out t...

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That blink pattern is unusual. I could be wrong, but it appears to me that your Arduino CPU is lost or is constantly rebooting. On V1.9 this can be caused by a RAM shortage if you have too many options enabled. Try disabling the LCD support and data logging and see if the symptom changes. Or load on...

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I dunno if this has been mentioned yet, but the temperature sensor on BMP085 is pretty noisy. Thanks for disclosing this issue. For sure, I was very excited to hear about it. So last night I did some experiments with the sensor's temperature readings. On my BMP085 there is some short term (within 1...

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I'm assuming you are using SERVO_TILT and not GIMBAL. This is patch is untested, so please don't shoot me if it doesn't work: Open output.pde. Find this: #ifdef SERVO_TILT if (rcOptions & activate[BOXCAMSTAB] ) { servo[1] = constrain(TILT_PITCH_MIDDLE + TILT_PITCH_PROP * angle[PITCH] /16 + rcDat...

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Hopefully an experienced MWC pilot in your local area can meet with you. Sometimes a bit of hands-on guidance from a Pro is all that is needed to solve the frustrations.

- Thomas

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May we use a shift register to do some fancy things with some leds connected to it? Things like that are certainly possible. For example, I have another MWC Quad with strings of animated LED's that uses a custom made I2C LED controller. But the goal of this hack was to keep things simple. BTW, this...

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ALTERNATE PATCH, SOFTWARE METHOD #2: POWERPIN control This is a new patch that is less dependent on existing code. This makes the edits much simpler on releases using V1.9 and higher. It cannot be used on earlier versions because it requires the POWERPIN that is used on all versions before V1.9. Re...

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Tested my Tri outside tonight in a light breeze and alt hld was not good, unpredictable "zoom climbs"10-15 meters. Regarding the unexpected "zoom climbs" that is a common symptom of ACC sensor overload. If you have enabled the TRUSTED_ACCZ (via the config.h defines) then you sho...

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It does show that the Mag is not always showing where north is, which could cause problems with navigation. If the Mag sensor is not accurate then there is a chance that the "3D" calibration was not performed correctly or the sensor is too close to metal objects or magnets. BTW, you shoul...

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SOFTWARE METHOD #1: CAMTRIG PORT Note: This is the original method that uses the CAMTRIG servo port. Begin by connecting the free end of the transistor's base resistor to the MWC's "CAMTRIG" servo connector. This pin is the one defined by DIGITAL_CAM_PINMODE. For the Promini it is Arduino...

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Once you have the two parts soldered together you will need to connect it to the LED's. As follows: 1. Ensure your LED strips have the correct voltage rating for your battery pack. 2. Connect the plus (+) end of ALL the LED's to battery positive (+). 3. Connect the negative (-) end of ALL the LED's ...

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Adding a remote LED control feature to the MWC is not a difficult task. There are an endless number of ways to do it; here's one method that does not take long and is very low cost. Besides the LED's, all you need is one transistor, one resistor, and some minor MWC sketch edits. It uses the CAMTRIG ...

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Try increasing your V1.9 MINTHROTTLE to 1190 (so it is the same as the V18.p2). It may help to change MAXTHROTTLE to 1900 too.

BTW, if your R/C Tx has an expo mix for the throttle stick then try some negative expo (not positive expo) on it. Maybe you will like the "feel" it gives.

- Thomas

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All good points. But keep in mind that it's not all up to the model; The pilot's personal preference is another element that determines PID values. What I mean is that higher PID values will make the most precisely made model fly more stable and require less pilot/stick interaction. But as the pilot...

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Do I need to compile the Conf app? Ready-to-run Conf apps for linux, mac and windows are stored in the downloaded distribution folders for official MWC release versions. I have not looked at MultiWiiConf_dev_20120121, but I suspect what you want is already there. If not then use a more official MWC...

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As mentioned by PatrikE, you have to compile MWC's conf app using the "Processing" IDE, not the "Arduino" IDE.

- Thomas

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It's telling you that the PC is not successfully communicating with the Arduino chip. Closely check all the serial cable connections and ensure you have selected the correct serial port in the Arduino Tools menu.

- Thomas

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why not go one step further and download the hex file that is ready for uploading to arduino? And then we will have a Cloud based IDE. It's all dreamy stuff. Honestly, I'd like the gifted programmers to just concentrate on making our MWC's fly better/faster/cheaper. Everything else is just lipstick...

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There is this available on line at the moment. http://ardupirates.net/config/MW_Config.php Very cool! Problem is that someone have to keep it up to date. Yes, program maintenance is a universal problem. It's fun to create this stuff, but such joy turns to tedium after awhile. - Thomas

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It would impact the MWC resources to push this onto the sketch. So config.h is a good thing. Perhaps one of you java web coders would like to develop and maintain an online form that creates the config.h. With this method, those that don't want any automated help would simply continue to use the tra...

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It looks like you have your high current wiring quite close to your sensor shield. The following video demonstrates the issue and offers some hints on how some layout methods can worsen the effect: http://vimeo.com/29519728 Be sure to watch the entire video to the end and do not skip through it. - T...

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If you have performed the 3D calibration, and increasing the throttle causes mag sensor problems, then you will need more distance between the sensor and the heavy current wiring (including the battery and its cables). It generally does not require a large distance to cure the problem, so it is not ...

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I agree that the MWC project has grown beyond the original design concept and development would be more efficient if the we abandoned the Arduino IDE. But the user base is already struggling with the simplicity of the Arduino IDE, so moving to a professional IDE would be a final straw for many of th...

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Do you know a resource about pullups? The link you mentioned in the first post has practical information about I2C rise times and levels. The Flyduino board developer will be able to advise if there are any pre-installed pullups on his designs that you are not aware of. If he says there are none th...

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i installed the sensors onto a Flydusense V2.0 on this board I installed 5V Pullups 6.8k I don't have any personal experience with the Flyduino and Flydusense. I searched for schematics to them and could not locate any. So without such details I am not able to confirm anything I recommend. The I²C ...

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Can someone fix this problem in the download package of MultiWii v1.9.

Try the replacing Configs V1.9's rxtxSerial.dll file with the revised version that has been mentioned in a few other discussions. I'm using it on V1.9 and it solved other PC communication related issues.

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i did some more fly tests now and it seems to be less stable with higher Hz Although that could be a symptom that your sensors are not compatible with your higher I2C speed, it could also be something less serious. For example, if your cycles times are significantly less when you changed to the hig...

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Are you absolutely sure there aren't any other I2C pullups lurking in your installation? For example, LLC's and external sensor boards often have some already installed. So carefully review everything to determine what's there before making any changes. If all that's installed are your 6.8K's, and t...

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Is my config okay, can I disable internal pullups since BMA020 and WMP have internal LLC? The CPU's internal pullups are very weak values that range from 30K - 50K ohms. On a typical MWC the ideal I2C pullup value is 2K - 3K ohms (2.2K ohms seems to be the sweet spot). I suggest you review all the ...

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I don't have any experience with that Rx. But the first thing I would do is measure the voltage on the unused signal pin on the battery input port. Using the voltmeter, observe the voltage on the pin with Tx powered On and then Tx powered Off. If you see a significant difference then you may have be...

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Modern 2.4GHz Rx's do not produce bad servo pulses. Even before a full-out failsafe, it's a common feature to flywheel the servo pulses using the previous (good) values. However, older FM-PPM Rx's will indeed produce corrupted pulses, but quantifying the corruption into a useful RSSI would not be pr...

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I checked the code (in shared branch) and Serial0 is asynchronous on all platforms. It can not block. In fact, if data is put in the buffer faster than the baud rate driven interrupt handler is taking it out, the calls to SerialWrite will simply overwrite the buffer. +1. I looked at some recent dev...

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The task of sending the hardware serial data via interrupts does not need to consume significant cycle time. The main/annex loop shouldn't pause while the serial task purges the entire serial buffer's contents. Instead, it should continue running and serial data should be sent as a background task u...

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I am using a HMC5883L. I read the link you posted about the HMC5883 vs. HMC5883L and the author reports at the end that the problems he was having were because he installed the wrong cap on the IC. If you are confident that your hardware is Ok then it may help to contact the Quadrino Adv. board deve...

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