Alexey Dobrovolskiy
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  • Riga
  • Latvia
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Alexey Dobrovolskiy's Discussions

WiFi 5Ghz telemetry module for Pixhawk

Started this discussion. Last reply by Alexey Dobrovolskiy on Sunday. 8 Replies

Hi,Anybody knows WiFi modules similar to very popular esp-07 or XBee WiFi, but for 5GHz? I mean modules compatible with Pixhawk, ie with UART port and necessary software support.Continue

Tags: 5Ghz, WiFi

Droneshare support

Started this discussion. Last reply by Alexey Dobrovolskiy Sep 14, 2015. 1 Reply

Hi,how to reach Droneshare support? support@droneshare.com it seems not working.My problem:I have uploaded my mission to Droneshare…Continue

UAV regulations in international waters

Started Aug 31, 2015 0 Replies

Hi,Anybody has understanding how regulated drones usage in international waters (high seas)?Continue

 

Alexey Dobrovolskiy's Page

Latest Activity

John Brady left a comment for Alexey Dobrovolskiy
"Alexey, I do not have any trust worthy data for Greenland. My translation for my data in Alaska is off, it should put me in Alaska, but is putting me in Greenland, Africa, or the middle of the Pacific depending on which projection of WGS84 I use. I…"
4 hours ago
Alexey Dobrovolskiy replied to John Brady's discussion Custom DEM - Coordinate System? in the group UgCS
"Hi John, UgCS uses WGS84 only. You can send one of your DEM files (smallest one :) to our support team, they will help."
4 hours ago
Alexey Dobrovolskiy replied to Christian Freydl's discussion shutter control for DJI M600 (A3) in the group UgCS
"Hi Chris, we can't promise anything particular. We are limited by DJI SDK functionality..."
4 hours ago
Alexey Dobrovolskiy replied to Alexey Dobrovolskiy's discussion WiFi 5Ghz telemetry module for Pixhawk
"Right. Plag and fly :) We have published BOM, schematics and all necessary for PCB here - https://github.com/ugcs/ddc/tree/master/WiFi/adapter"
Sunday
Seunghwan Choi replied to Alexey Dobrovolskiy's discussion WiFi 5Ghz telemetry module for Pixhawk
"um..!! Accroding to what you reply, prepare adapter and APMN-Q551 and just plug in this adapter to Pixhawk’s telemetry port?"
Friday
Alexey Dobrovolskiy replied to Alexey Dobrovolskiy's discussion WiFi 5Ghz telemetry module for Pixhawk
"APMN-Q551 doesn't know about MAVLink. It's just WiFi adapter ))"
Friday
Seunghwan Choi replied to Alexey Dobrovolskiy's discussion WiFi 5Ghz telemetry module for Pixhawk
"this program use mavlink v1.0 or v2.0?  My esp8266 looks like using only mavlink v1.0."
Friday
Alexey Dobrovolskiy replied to Alexey Dobrovolskiy's discussion WiFi 5Ghz telemetry module for Pixhawk
"Please see these videos: https://youtu.be/LlzcwvD3VtQ https://youtu.be/jhSYpPkmm6k Half of these drones use esp-07 WiFi modules, another equipped by APMN-Q551. APMN-Q551 works much more reliable, especially in case if there are another WiFi…"
Apr 10
Seunghwan Choi replied to Alexey Dobrovolskiy's discussion WiFi 5Ghz telemetry module for Pixhawk
"wow, it is awesome. What is carrier board?  And, did you success to connect wifi via APMN-Q551?"
Apr 10
Alexey Dobrovolskiy replied to Colin Girvan's discussion Altitude too high. in the group UgCS
"Yes, have sense. Thank you."
Apr 4
Alexey Dobrovolskiy replied to Colin Girvan's discussion Altitude too high. in the group UgCS
"Hi Mark, I'm very sorry, but if our tech support engineer doesn't know solution based on information provided it has to ask additional information. Flight limits are stored in autopilot, not in DJI GO. So if you never changed maximum range…"
Mar 31
Alexey Dobrovolskiy replied to Omer's discussion WiFi Telemetry with Cheap ESP8266
"We use esp8266 modules to control swarm of drones Here are instructions how to configure and connect them - https://github.com/ugcs/ddc/tree/master/WiFi"
Mar 31
Alexey Dobrovolskiy replied to Alexey Dobrovolskiy's discussion WiFi 5Ghz telemetry module for Pixhawk
"yes, but quite expensive https://eu.mouser.com/ProductDetail/B+B-SmartWorx/APMN-Q551/?qs=%2fha2pyFadugkQOkkKYYz9qkJIz77uKynj21oZcDhl8c= And this module requires carrier board. Total bill of material is around 100€ per adapter. "
Mar 31
Seunghwan Choi replied to Alexey Dobrovolskiy's discussion WiFi 5Ghz telemetry module for Pixhawk
"Do you find any answer about it? I also find WiFi modules can use 5GHz. But as you know esp use only 2.4GHz."
Mar 28
Alexey Dobrovolskiy replied to Ethan Payne's discussion Display images onto UGCS in the group UgCS
"Hi Ethan. sorry for delay from our side. It's not just converting into GeoTiff. You need to take drone AGL, yaw and camera position to scale /rotate picture in accordance to the ground level and drone/camera attitude. UgCS Mapper can't do…"
Feb 13
Alexey Dobrovolskiy replied to Bodo Schütze's discussion Errors with 3s RAW image trigger time @ Phantom 4 PRO in the group UgCS
"Hi Bodo, I'm very sorry for my inappropriate reaction... Our 3s in camera profile is a conservative value based on our experience. We get such results too often with shorter time (it's Phantom 3 and 2s between shots):"
Feb 3

Profile Information

Please tell us a bit about your UAV interest
I'm working for SPH Engineering - developer of UgCS - ground control software in Latvia.
Hometown:
Riga

Alexey Dobrovolskiy's Blog

Multiple drones and multiple operator support in U[g]CS

Posted on December 26, 2013 at 12:03am 2 Comments

 

Here is footage from software showing our software capability to simultaneously plan and execute mission with 3 different drones. Arducopter, Microdrone MD4-200 and Mikrokopter were used.

As we support at this moment Arducopter, Mikrocopter, ArDrone, Microdrone this demo can be interesting at least for professional users of…

Continue

Comment Wall (7 comments)

At 11:11am on April 17, 2015, Mike Governale said…

Thanks Alexey...  and good luck with your latvian farmers.

We carry a modified Canon PowerShot A810 (with standard lens) for the NDVI imagery.  We fly the same mission with another "unmodified" A810 to capture the 16 mp images.

We use Kolor's AutoPano Giga for stitching the images and process the NDVI with a plugin on ImageJ software.

For small crop acreage using our Y6 frames, we have found that 170feet altitude and 17mph speed provides the best stitching image resolutions desired while still leaving plenty of battery life for a safe return to home.  Our flight program triggers image captures by distance covered (and not triggered by way points) and we have flown this configuration in varying direction 20mph winds without loosing images because we exceeded the PowerShot A810 2.5 second refresh rate.

At some point, we hope to be able to afford using (and risking, if you know what I mean) modified cameras with a much larger sensor area (like a Sony Nex 6).  This would allow us to fly lower and/or faster with the same resolution.

We will stay with the cheaper cameras for now because satisfy requirements.  We are starting to test using our Skywalker's (1900 mm motorized gliders) for larger acreage surveys.  With these we have greater flight times, but the challenge is how to fly slow enough and low enough.

As you must know....   it is a continuous learning experience while trying to balance the costs, etc.

I hope this was somewhat helpful.

Mike G.

At 3:34pm on April 24, 2015, Alexey Dobrovolskiy said…

Thanks Mike,

could you tell also is GSD important for NDVI calculation? 

At 1:01pm on December 10, 2015, Ali said…

hi, there, I have seen a picture from power line inspection.

that was very clear and low noisy.

I want to know about your flight plan. the height, ortho imaging or oblique,

the distance from power line axis and the coverage of images(side coverage and along coverage). i tried that and have processed my data with pix4d but the result was not as the same as your pictures.

At 1:35pm on December 10, 2015, Alexey Dobrovolskiy said…

Hi,

as I remember it was ortho, altitude over line about 10 meters, distance from power line axis about 10 meters too.

And we make too much photos, processing time was about full day and night, but quality was perfect.

At 8:05am on December 11, 2015, Ali said…

thank you so much, by the way, can i ask you about your camera type.?

At 8:19am on December 11, 2015, Ali said…

sorry one more question.

i want to know about number of flight path in direction of power line.

i guess it must be two. with 10 meters distance from both sides of power line.

if its more please tell me.  

yours truly

Ali

At 4:22pm on April 25, 2018, John Brady said…

Alexey, I do not have any trust worthy data for Greenland. My translation for my data in Alaska is off, it should put me in Alaska, but is putting me in Greenland, Africa, or the middle of the Pacific depending on which projection of WGS84 I use. I am trying to figure out the proper projection that UgCS is using so my data from Alaska is where it belongs, in Alaska. Thanks!

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