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What's the difference between ( Absolute , Relative , Terrain ) Alt in MP ?

Started by Marco C. Last reply by Randy 3 hours ago. 2 Replies

Can anyone tell me how can I fly my copter keeping costant distance between it and the ground, I want to use google earth data to achieve this,  I think it is possible but I have some problem to…Continue

NEW - GPS/INS system - High accurate low cost attitude,position,velocity sensor.

Started by htr. Last reply by Benjamin Trapnell yesterday. 1 Reply

Hi guys,As we all know high accurate attitude(orientation) , position , and velocity data are very much important for UAV navigation.Air plane is a vehicle which always travel with some considerable…Continue

Any experience with Li-HV batteries?

Started by Cala. Last reply by Cala on Sunday. 16 Replies

Anyone test this batteries?  …Continue

No compass calibration no movement at all!

Started by mark liles. Last reply by mark liles on Saturday. 9 Replies

Hello, I am using windows 10 and have 2 separate APM2.6I can update and have loaded firmware ver 3.2, and everything goes fine until I get to the compass calibration, and than nothing. NO dots, no…Continue

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Comment by Doug Adduci on June 7, 2016 at 1:47pm

I think there is a paperclip reset hole on the side of the pixhawk.  That should do it.

Comment by david turner on June 7, 2016 at 12:16pm

Good evening 

Is there a simple way to reset my pixhalk ? 

I purchased one to put in my 650 tarot and used mission planner to set it up, as I am use to this.

Then I read Qground control was better , don't believe everything you read.

So tryed it and don't like it and thought I could just reinstalled program from mission planner.No you can't won't install firmware ,so I want to start all over again from fresh. Is there a way to do this ? Looked and asked intranet without any joy.

Anybody?

Regards Dave

Comment by arttu mahlakaarto on June 7, 2016 at 11:08am

hi, can someone help me with APM 1???

Comment by Cala on June 5, 2016 at 9:50am

Make a cable as Tony describe, I removed the little pins from the connector and change their place

Comment by dongfeng on June 5, 2016 at 9:03am

How do you do!

Comment by Cala on May 29, 2016 at 3:41pm

Yes, that the correct position, mine is working now like that. Another thing that don't sound right is a red wire in SCL and a black one in vcc.

Comment by Tony Wall on May 29, 2016 at 3:16pm
Comment by Tony Wall on May 29, 2016 at 3:11pm

The connection cable provided with the GPS is straight, no cross-over of TX/RX (just the whole connector is up/down), but as the motherboard of the GPS (I opened it) is not labelled we don't know that the RX goes to RX as Cala suggests. The only documentation is on the PixFalcon side, so the GPS obviously has TX and RX pins the other way around as Craig says, else it wouldn't work. Both of you are right, no mistake has been made by the Holybro manufacturer besides not documenting the PixFalcon peripherals (shame because the rest of the docs and web site are nice and clean).

On the GPS side we have then, from left to right: 

1 = GND (pin 6 on FC)

2 = TX (RX on FC)

3 = RX (TX on FC)

4 = VCC +5V

5 = SDA

6 = SCL (red, pin 1 on FC)

Sound right?

Comment by Cala on May 29, 2016 at 2:22pm

Yes, but labels were reverse in pixfalcon vs gps, rx with Rx and Tx with Tx, the easier way is if this guys stamped the board as many do, they have lot of space. 

Comment by Craig on May 29, 2016 at 1:55pm

TX and RX are always reversed. TX goes to RX and RX goes to TX. That's how serial devices communicate.

 
 
 

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