Search found 457 matches
- Fri Jun 22, 2012 5:45 pm
- Forum: Software development
- Topic: dev 20120618 and dev 20129616
- Replies: 26
- Views: 7338
Re: dev 20120618 and dev 20129616
Reloaded dev 20102522 with the code that comes with the dev for the L3G4200D and it throws i2c errors. The modified code is the one to use but when put into the 616 618 dev's it doesn't work. It seems odd that the stock dev code is causing I2C errors only on the gyro. The address it uses looks good...
- Fri Jun 22, 2012 4:58 pm
- Forum: Software development
- Topic: dev 20120618 and dev 20129616
- Replies: 26
- Views: 7338
Re: dev 20120618 and dev 20129616
Load the old MWC V2 version that was "working" well for you. Confirm that all the sensors are running in the GUI. If you still see I2C errors then you may have a sensor problem or the I2C pullups need attention. Typically such problems are due to incorrect pullups.
- Thomas
- Thomas
- Fri Jun 22, 2012 4:53 pm
- Forum: ESCs, propellers , servos and radios
- Topic: Sputtering motors at high load and fresh battery
- Replies: 9
- Views: 3650
Re: Sputtering motors at high load and fresh battery
This seems to describe my issue: m ... st21959506 Now that is interesting. I'm using Simonk's ESC firmware (downloaded June-1-2012) on my 450 Quad and it flies great with MWC V1.9. But with V2.0dev I have experienced exaggerated pitch/roll during aggressive movement. But since it does not happen wi...
- Fri Jun 22, 2012 6:26 am
- Forum: ESCs, propellers , servos and radios
- Topic: Sputtering motors at high load and fresh battery
- Replies: 9
- Views: 3650
Re: Sputtering motors at high load and fresh battery
Until I saw it for myself, I never thought the bullets would cause any trouble. There's a couple other fellows on this forum that have also been bitten by this issue. The connectors certainly look robust. But If you tear the plug side apart you will see it is actually two pieces swagged together. Th...
- Fri Jun 22, 2012 3:42 am
- Forum: ESCs, propellers , servos and radios
- Topic: Sputtering motors at high load and fresh battery
- Replies: 9
- Views: 3650
Re: Sputtering motors at high load and fresh battery
Tough one. But just to throw a curve ball at you, don't limit the investigation to the obvious things affected by a fresh charged battery. Maybe it is something totally unexpected. For example, I spent several days chasing down randomly sputtering motors. The problem would move from motor to motor, ...
- Thu Jun 21, 2012 10:29 pm
- Forum: Software development
- Topic: dev 20120618 and dev 20129616
- Replies: 26
- Views: 7338
Re: dev 20120618 and dev 20129616
Comment out the ADXL defines so that this sensor is disabled/ignored. If you still have I2C errors reported in the GUI then the problem is affecting more than just the ADXL. But if no errors are seen with the ADXL removed from the code then you will at least have narrowed down the issue to either an...
- Thu Jun 21, 2012 9:53 pm
- Forum: Software development
- Topic: dev 20120618 and dev 20129616
- Replies: 26
- Views: 7338
Re: dev 20120618 and dev 20129616
With the above code included the board works OK in V2 and DEV 20120522 the ADXL Address in V2 and DEV522 is 0xA6 in the 616 and 618 DEV's the ADXL 345 address is 0x53 in def.h and in the sensor tab it is 0x1D with the 0x53 address commented out underneath. An 8bit address of 0xA6 would be 0x53 in 7...
- Thu Jun 21, 2012 8:25 pm
- Forum: Software development
- Topic: dev 20120618 and dev 20129616
- Replies: 26
- Views: 7338
Re: dev 20120618 and dev 20129616
Tried with dev 20120522 same settings and the IMU works as it should, only thing I have found that is different is the address for the gyro has changed in the dev 616 and 618 versions. The I2C address changes to the sensors got me too when I loaded up MultiWii_dev_20120606. These little code tweaks...
- Thu Jun 21, 2012 5:18 pm
- Forum: Shields, boards and sensors
- Topic: XAircraft Pilot Lamp Accessory Hack
- Replies: 96
- Views: 36875
Re: XAircraft Pilot Lamp Accessory Hack
I saw there are two versions, one with housing and one without. I recommend the one with the attractive plastic case. It only adds a couple grams of weight and it looks better than the shrink wrap version. And of course you can always remove the case (4 screws) and shrink wrap it yourself if you la...
- Thu Jun 21, 2012 4:32 pm
- Forum: General discussions
- Topic: Unexpected Sensor Orientation on V2.0
- Replies: 3
- Views: 1416
Re: Unexpected Sensor Orientation on V2.0
In order to add easier other sensor, the code part of each sensor follow now the sensor spec.
viewtopic.php?f=8&t=1259&p=12168
Thanks for the background information. The explanation for the orientation changes makes sense.
- Thomas
- Thu Jun 21, 2012 8:15 am
- Forum: Shields, boards and sensors
- Topic: XAircraft Pilot Lamp Accessory Hack
- Replies: 96
- Views: 36875
Re: XAircraft Pilot Lamp Accessory Hack
The device is controlled via PWM? I had only partial success with PWM (results were not consistent). The protocol that worked reliably for me is based on a symmetrical frequency burst as described in post #3. So is it possible to blink two LEDs and beep the buzzer!? You can have any combination of ...
- Thu Jun 21, 2012 5:32 am
- Forum: General discussions
- Topic: Unexpected Sensor Orientation on V2.0
- Replies: 3
- Views: 1416
Unexpected Sensor Orientation on V2.0
I've been using V1.9 (release 3) for many months and I like it. A lot. But I today I decided to upgrade to V2.0. So I grabbed the latest dev version from the SVN. I know dev releases can be a gamble, but I noticed many reported bugs on the original V2.0 release so I figured I had nothing to lose. De...
- Thu Jun 21, 2012 12:03 am
- Forum: ESCs, propellers , servos and radios
- Topic: ESCs getting hot - wrong PWM frequency?
- Replies: 13
- Views: 6621
Re: ESCs getting hot - wrong PWM frequency?
The new ESC's are very affordable, so that is good news. Are you planning to reflash them before installation?
- Thomas
- Thomas
- Wed Jun 20, 2012 11:13 pm
- Forum: ESCs, propellers , servos and radios
- Topic: ESCs getting hot - wrong PWM frequency?
- Replies: 13
- Views: 6621
Re: ESCs getting hot - wrong PWM frequency?
The ESCs are making the characteristic Plush 'clicking' sound which I believe is a ESC -> motor timing issue, and I was hoping that re-flashing the ESCs might solve this problem as well as make the ESCs more efficient. +1, I expect you will experience such improvements with the magic ESC code. If I...
- Wed Jun 20, 2012 10:58 pm
- Forum: Shields, boards and sensors
- Topic: XAircraft Pilot Lamp Accessory Hack
- Replies: 96
- Views: 36875
Re: XAircraft Pilot Lamp Accessory Hack
Attached is the basic code that is needed to control Pilot Lamp's three LEDs and buzzer. It is a pde file that is added to your MWC source code folder. You can rename it with the .ino extension if that is how you roll. You simply plug the Pilot Lamp's 3-wire cable into MultiWiiCopter's Buzzer port (...
- Wed Jun 20, 2012 8:04 pm
- Forum: ESCs, propellers , servos and radios
- Topic: ESCs getting hot - wrong PWM frequency?
- Replies: 13
- Views: 6621
Re: ESCs getting hot - wrong PWM frequency?
That is too bad; Looks like you'll need better ESC's to solve the over-temp issue. I suppose my preferred mounting of ESC's exposed to moving air / prop wash is a good thing.
- Thomas
- Thomas
- Wed Jun 20, 2012 5:33 am
- Forum: ESCs, propellers , servos and radios
- Topic: ESCs getting hot - wrong PWM frequency?
- Replies: 13
- Views: 6621
Re: ESCs getting hot - wrong PWM frequency?
The high temp could be from the ESC's linear Vregs or FETS, so it would be helpful to determine which is heating up. I suggest you power up the model with motors disarmed and then see if the ESC's remain cool after a few minutes. If they start to get too hot then there is something odd going on with...
- Wed Jun 20, 2012 1:09 am
- Forum: Shields, boards and sensors
- Topic: XAircraft Pilot Lamp Accessory Hack
- Replies: 96
- Views: 36875
Re: XAircraft Pilot Lamp Accessory Hack
I wrote some preliminary MWC code to control the three LED's and buzzer. I'll post the sample code soon; In the meantime, here is a YouTube demo of my test code that sequences the three LED's and beeps the buzzer: m By the way, the buzzer is loud! For bench testing I've stuffed a piece of sponge in ...
- Tue Jun 19, 2012 12:31 am
- Forum: Shields, boards and sensors
- Topic: XAircraft Pilot Lamp Accessory Hack
- Replies: 96
- Views: 36875
Re: XAircraft Pilot Lamp Accessory Hack
I was able to control the buzzer and lights using a Function/Signal (frequency) generator. I don't expect my findings represent the official communication protocol, but my clumsy solution works. The control waveform should be symmetrical and it can be idle when not writing/changing new states, but a...
- Mon Jun 18, 2012 8:33 pm
- Forum: Shields, boards and sensors
- Topic: XAircraft Pilot Lamp Accessory Hack
- Replies: 96
- Views: 36875
Re: XAircraft Pilot Lamp Accessory Hack
I received the Pilot Lamp device today and took a peek at the circuitry. It uses a STC11F01 MCU (8051 core). The communication signal on its 3-wire cable is not connected to the MCU's RxD pin. Instead it is uses INT1. So this suggests that the serial protocol is probably not common RS-232. Not that ...
- Sun Jun 17, 2012 5:19 pm
- Forum: Software development
- Topic: LED & buzzer addon
- Replies: 4
- Views: 2990
Re: LED & buzzer addon
I'm interested in it too, but cannot find any information on the communication protocol. viewtopic.php?f=6&t=1794
- Sun Jun 17, 2012 12:43 am
- Forum: Buy & Sell
- Topic: frame suggestions or offers
- Replies: 12
- Views: 4627
Re: frame suggestions or offers
I am happy with my 450 size DJI clone (with 10x4.7 APC props). It is a very low cost frame so it's not a burden to buy an extra kit to use as spare parts for crash repairs. I have some details on my build posted here: http://www.rc-cam.com/forum/index.php?/ ... og-part-3/
- Mon Jun 04, 2012 8:17 pm
- Forum: Shields, boards and sensors
- Topic: XAircraft Pilot Lamp Accessory Hack
- Replies: 96
- Views: 36875
XAircraft Pilot Lamp Accessory Hack
I recently came across the XAircraft Pilot Lamp accessory ($10 LED/Buzzer) and thought it would be an interesting candidate for the MWC. Unfortunately I don't own an XAircraft to reverse engineer and I can't find any communication protocol information on it. Given the simple 3-wire connection, I ass...
- Sun May 20, 2012 6:48 pm
- Forum: Shields, boards and sensors
- Topic: Please help !
- Replies: 1
- Views: 918
Re: Please help !
Check the GUI's i2C error counter. If it is reporting errors then read this for the hardware fix:
viewtopic.php?f=8&t=986
- Thomas
viewtopic.php?f=8&t=986
- Thomas
- Tue May 08, 2012 5:14 pm
- Forum: Connecting elements
- Topic: Internal Pullups for dummies
- Replies: 7
- Views: 3846
Re: Internal Pullups for dummies
is my setup the reason that the copter sometimes behaves strange but most of the times is okay!? Incorrectly chosen pullups can cause problems with the model's reliability and performance. We have no idea if this is YOUR issue, but it is certainly high on the list. Is activated internal pullups and...
- Mon May 07, 2012 8:18 pm
- Forum: Connecting elements
- Topic: Internal Pullups for dummies
- Replies: 7
- Views: 3846
Re: Internal Pullups for dummies
1. The value of the internal pullups is about 40K ohms. This is far above the ideal i2c values of about 2.2K ohms. From my experience the internal pullups are inadequate for the task and part of the reason for many poor performing MWC installations. 2. The internal pullups are sourced from 5V. Conne...
- Thu May 03, 2012 4:36 pm
- Forum: General discussions
- Topic: Unflyable after clearing eeprom
- Replies: 6
- Views: 3979
Re: Unflyable after clearing eeprom
Check the GUI again, but ignore the graphical image. Watch the raw sensor data instead. Do the raw values work as described in the FAQ? FAQ: TILT the MULTI to the RIGHT (left side up): MAG_ROLL, ACC_ROLL and GYRO_ROLL goes up MAG_Z and ACC_Z goes down TILT the MULTI forward (tail up): MAG_PITCH, ACC...
- Thu May 03, 2012 4:20 pm
- Forum: Getting Started - MultiWii config and setup
- Topic: Arduino gets stuck on blinking
- Replies: 4
- Views: 2442
Re: Arduino gets stuck on blinking
The bayrc guide I followed, showed that, in addition to the negative leads, the positive leads of all ESCs should also be connected together. I recommend that you only power from one ESC's BEC and disable the other three BECs. Don't cut the wires, just slide out the red wire from each ESC's servo p...
- Thu May 03, 2012 1:16 am
- Forum: Getting Started - MultiWii config and setup
- Topic: Arduino gets stuck on blinking
- Replies: 4
- Views: 2442
Re: Arduino gets stuck on blinking
You should state the MWC firmware version you are using too. Another guess is that the cause of the problem are the ESCs. HobbyKing's guys keep telling that the above ESC is not good for multi-rotors, but the multiwii site claims that the SS series can update fast enough. I can't really say. I have ...
- Tue May 01, 2012 7:01 am
- Forum: MultiWii tweaking - flying experience
- Topic: yaw spin when in fast forward flight
- Replies: 1
- Views: 1148
Re: yaw spin when in fast forward flight
Are you sure it's not a "mechanical" issue? For example, prop hub not adequately fixed to motor shaft or frame/motor-arm torquing under high motor speeds?
- Thu Apr 12, 2012 8:23 pm
- Forum: General discussions
- Topic: Rc signal waiting or multithreading?
- Replies: 4
- Views: 1721
Re: Rc signal waiting or multithreading?
The MWC code uses CPU hardware interrupts to process the R/C Rx's signals. So there are are no halts, waits, or delays needed between servo pulses.
- Thomas
- Thomas
- Tue Apr 10, 2012 8:37 pm
- Forum: Shields, boards and sensors
- Topic: tricks for avoiding magnetometer interference ?
- Replies: 22
- Views: 17609
Re: tricks for avoiding magnetometer interference ?
This fellow's video demonstrates how wiring layout impacts the mag sensor:
http://vimeo.com/29519728
- Thomas
http://vimeo.com/29519728
- Thomas
- Wed Mar 28, 2012 7:27 pm
- Forum: Shields, boards and sensors
- Topic: Problems with WMP,BMA and Pro Mini
- Replies: 10
- Views: 3208
Re: Problems with WMP,BMA and Pro Mini
Why do I not need the reset option, like discribed in faq? There have been changes over the last few months that are not mentioned in the FAQ. Starting with V1.9, the D12 power reset has been abandoned. The reset is no longer required because the WMP sensor lock-up problem was solved with code impr...
- Wed Mar 28, 2012 5:40 pm
- Forum: Ideas
- Topic: 0.96" SSD1306 128X64 OLED Display Module
- Replies: 207
- Views: 243594
Re: 0.96" SSD1306 128X64 OLED Display Module
Hi Thomas. I tried with the display reversed. Not good! The resulting immage is a "white-out" because the "backround" is actually thousands of tiny LED's ! Thanks for trying it out. But no worries; I expect the reverse video will increase the chance of video camera artifacts, so...
- Tue Mar 27, 2012 10:52 pm
- Forum: Ideas
- Topic: 0.96" SSD1306 128X64 OLED Display Module
- Replies: 207
- Views: 243594
Re: 0.96" SSD1306 128X64 OLED Display Module
It's certainly readable in direct sunlight. I will try it with reversed colours (BLACK characters on WHITE back-round) tomorrow. Thank you, that would be very helpful. If it isn't too much trouble, please try recording the display with your camera again in bright light. The OLED's video artifacts w...
- Tue Mar 27, 2012 5:40 pm
- Forum: Ideas
- Topic: 0.96" SSD1306 128X64 OLED Display Module
- Replies: 207
- Views: 243594
Re: 0.96" SSD1306 128X64 OLED Display Module
@mr.rc-cam:
I've uploaded a video to Utube: http://youtu.be/dm5RNufNArE
Thank you, I appreciate that.
How's it look in bright outdoor lighting? Does it wash out or is the contrast still acceptable.
- Thomas
- Tue Mar 27, 2012 6:09 am
- Forum: Ideas
- Topic: 0.96" SSD1306 128X64 OLED Display Module
- Replies: 207
- Views: 243594
Re: 0.96" SSD1306 128X64 OLED Display Module
Awesome! I'd be interested in using it as a video cockpit in front of my FPV camera. How does its contrast look while outdoors in direct sunlight? Is there any chance you could record an indoor demo video as it prints the text messages? It would be interesting to see if it has scanning artifacts lik...
- Fri Mar 23, 2012 2:49 am
- Forum: Ideas
- Topic: Reading RC channels
- Replies: 1
- Views: 1189
Re: Reading RC channels
The reason why the Arduino Pulsin() function is not used can be found in the function's description. pulseIn() Description: Reads a pulse (either HIGH or LOW) on a pin. For example, if value is HIGH, pulseIn() waits for the pin to go HIGH, starts timing, then waits for the pin to go LOW and stops ti...
- Thu Mar 22, 2012 5:01 am
- Forum: Getting Started - MultiWii config and setup
- Topic: How come nobody builds their own ESCs?
- Replies: 12
- Views: 4644
Re: How come nobody builds their own ESCs?
Specifically, it looks like all one would really need is a MOSFET driver that can handle the proper amperage rating of the motors used. It would be as simple as that if we were using brushed motors. However, there's a lot more going on in a 3-phase brushless ESC and the typical MWC's CPU does not h...
- Wed Mar 21, 2012 6:55 pm
- Forum: ESCs, propellers , servos and radios
- Topic: Plush 18 odd behaviour
- Replies: 8
- Views: 2730
Re: Plush 18 odd behaviour
it still has a wobble but not near as bad as before. Something is still not 100% though, it can stay in the air but not useful for fpv or areal video Before you give up I think it would be worth your effort to check/resolve any vibration issues. You can use the GUI's sensor data to see the vibratio...
- Tue Mar 20, 2012 11:24 pm
- Forum: Shields, boards and sensors
- Topic: HMC doesn´t work ....
- Replies: 5
- Views: 2339
Re: HMC doesn´t work ....
1. Carefully observe the items installed in the Gyro sensor's proximity. Things like magnets or any metal items are forbidden because they will affect the measured magnetic fields. 2. Repeat the "3D" all-axis Gyro calibration using the GUI button. Slowly rotate the model on all of its axis...
- Tue Mar 20, 2012 4:42 pm
- Forum: ESCs, propellers , servos and radios
- Topic: Plush 18 odd behaviour
- Replies: 8
- Views: 2730
Re: Plush 18 odd behaviour
Now it gets weird, for the first 2 weeks I had these esc's they worked fine on both sets of motors, it's as if they have all become damaged at exactly the same time. Any ideas or people with similar problems??? Just had a VERY similar experience that I thought was being caused by my Quad's Proton 1...
- Wed Mar 14, 2012 7:38 pm
- Forum: General discussions
- Topic: Front Right motor problem on Hexa
- Replies: 22
- Views: 5905
Re: Failsafe problem ?
Just one question : is it possible that failsafe has a bug and one motor stop when copter runs into it ? It will not help to understand why i run into failsafe but it could explain why one motor stop (and always the same). FWIW, most modern R/C Rx's won't allow the MWC failsafe to activate because ...
- Mon Mar 12, 2012 11:13 pm
- Forum: MultiWii tweaking - flying experience
- Topic: Quadcopter crash in stable mode, ver 1.7..
- Replies: 8
- Views: 3403
Re: Quadcopter crash in stable mode, ver 1.7..
No defect connectors/wires.. Plugged in battery after crash.. Everything fires right up... That doesn't mean your wiring is reliable. Intermittent connectors/wiring can make common troubleshooting very difficult. I experienced this first hand, as discussed here: http://www.multiwii.com/forum/viewto...
- Sat Mar 10, 2012 6:20 pm
- Forum: ESCs, propellers , servos and radios
- Topic: Motor stops while flying
- Replies: 10
- Views: 5953
Re: Motor stops while flying
I said it before and will say it again - never use bullet connectors.
Wise words indeed.
- Thomas
- Sat Mar 10, 2012 7:47 am
- Forum: ESCs, propellers , servos and radios
- Topic: Motor stops while flying
- Replies: 10
- Views: 5953
Re: Motor stops while flying
My problem is that suddently one motor stops while in flight mode (not idle). This offcourse results in a crash. I have tried to investigate the problem by holding the quad by hand. When idling there is no problem, but when throtteling up, one motor ususally stops within around 10-40 seconds. Not a...
- Thu Mar 08, 2012 11:57 pm
- Forum: Ideas
- Topic: esc refresh rate in gui ?
- Replies: 2
- Views: 1486
Re: esc refresh rate in gui ?
V1.9 uses hardware based analogWrite() to create most of the PWM signals. The ~490Hz refresh rate is fixed by the Arduino library. Please see the library reference for full details on the analogWrite function.
- Thomas
- Thomas
- Mon Mar 05, 2012 3:44 am
- Forum: Getting Started - MultiWii config and setup
- Topic: Help needed
- Replies: 19
- Views: 6430
Re: Help needed
now the warthox board is mounted on the frame with 2 screws with foam in between but via the 2 screws it is in direct contact with the frame of course which will be of influence. Eliminate the screws. The sensors need good isolation from the frame to damp the motor/prop vibrations. As mentioned, se...
- Mon Mar 05, 2012 12:03 am
- Forum: Getting Started - MultiWii config and setup
- Topic: gerneral Understanding of MW-regulation
- Replies: 3
- Views: 1470
Re: gerneral Understanding of MW-regulation
does the Arduino only give the throttlevalues to the esc's or is there a feedback from the esc about the real rpm to the arduino? Reading the actual RPM is not a feature available on common ESC's. The required feedback is from the 3-axis gyros (and optional accelerometers). Are the values shown in ...
- Sun Mar 04, 2012 7:06 pm
- Forum: ESCs, propellers , servos and radios
- Topic: Motor stops while flying
- Replies: 10
- Views: 5953
Re: Motor stops while flying
I am not sure how to calibrate and program the ESCs, as there no documentation. The throttle range needs to be calibrated in order for the ESC to work in harmony with the MINTHROTTLE setting. You also need to ensure the ESC is programmed correctly or the ESC's low voltage cutoff (LVC) feature may i...