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Valid values for Mavlink SCALED_PRESSURE

Started by Tom Rearick Mar 30. 0 Replies

I have a raspberry pi reading mavlink messages from a pixhawk. When I read SCALED_PRESSURE I get hPa values around 490  - less than half of what I would expect - and a temperature around 4834 in…Continue

Disabling Internal Compass with ArduCopter 3.6

Started by Ricardo Maroquio. Last reply by Doug Adduci Nov 19, 2018. 1 Reply

Hi, everyone.I'm using ArduCopter for the last 4 years and I always tried to find a way to disable the internal compass(es) to avoid the "error compass variance" and things like that when you have an…Continue

Tags: Using, Only, External, 3.6, ArduCopter

Ardupilot SITL Simulator Testing

Started by Dush Perera Oct 26, 2018. 0 Replies

I set up the ardupilot simulation in ubuntu 14.04 using this link  (…Continue

Controlled Yaw while loitering at a Waypoint in AUTO mode

Started by L Sep 6, 2018. 0 Replies

I'm trying to find a way to do a controlled slow, smooth yaw (though if it can't be smooth, I can live with it) while in auto mode hovering at a waypoint. I've tried using "wait for heading"…Continue

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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.

Comment by Cala on May 29, 2016 at 1:18pm

Finally I found the gps in Gervais post, reverse Tx and Rx and works :D http://www.rcgroups.com/forums/showthread.php?t=2576614 in Pixfalcon they are reversed :(

 
 
 

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