Information

ArduCopter User Group

Discussion group for ArduCopter users

Members: 3128
Latest Activity: Feb 7

Discussion Forum

Calling all Custom Multi-Copter Pilots!

Started by Forrest Frantz. Last reply by Jon Turner Jan 23. 6 Replies

I'm going to do what is called a "pull" to made changes to the custom code regarding custom shaped copters.  This change in code would only impacts irregular shaped quads, hexas, and octas when the…Continue

strange behaviour of pixhawk-request help to understand

Started by moriarty. Last reply by moriarty Jan 6. 2 Replies

HiI am building a 1300mm octocopter with 30AH lipo. I want to be using a tegra tx1 for onboard visual processing coming from a sony a6000. I have built the drone and assembled it. I have configured…Continue

Motors spin slowly at min throttle on Arm

Started by Naren. Last reply by Bill Isenberger Dec 2, 2017. 23 Replies

I have calibrated the ESCs, installed the latest firmware and followed setup procedures by the book; The props start spinning the moment the APM is armed. I am using the APM 2.0 with a 3.1 Arducopter…Continue

Position Hold wont stay in position

Started by Edgar Scott. Last reply by Terry Nov 25, 2017. 31 Replies

I have been using stabilize, wanted to try position hold to see if it will at least stay in my back yard and it wont, it drifts off almost hitting fences and plants.I know the GPS works well because…Continue

Comment Wall

Comment

You need to be a member of ArduCopter User Group to add comments!

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 :(

Comment by Cala on May 29, 2016 at 1:07pm

No GPS, the green light work, horrible that any stamped references, any documentation, bad product. :(

Comment by Cala on May 29, 2016 at 7:47am

Thank's Tony, perhaps devs take in consideration your intersting sugestions in gihtub https://github.com/ArduPilot/ardupilot_wiki/pulls

Comment by Tony Wall on May 29, 2016 at 7:47am

...so this one defaults to 56k baud out the box, and must be set to 9k to get a reliable flash to the new 3.01 firmware for Galileo support and other improvements. So expect to get hold of a CP2102 USB serial adapter and make-up a cable to connect this GPS directly if you want the best out of it. It should still work out the box on the old firmware, but then in APM you must enable GPS auto config and save config when needed, then hopefully it will set the GPS to 38k and you won't get garbled data (by default from HK it's sending 56K but APM wants 38k kind of hard coded from what I gather). That was my impression, after many hours of work with these devices (like 4 different units/quadcopter builds). The debug messages on the console clearly indicate APM has issues with GPS serial speed, disregarding what the physical port is set to (strange).

 
 
 

© 2018   Created by Chris Anderson.   Powered by

Badges  |  Report an Issue  |  Terms of Service