Charles Linquist
  • Male
  • Campbell, CA
  • United States
Share

Charles Linquist's Friends

  • SV
  • iSkyMaster
  • tom hobart
  • tim jackson
  • Kevin Klemens
  • DroneRanger
  • John Maugeri
  • Nate Miller
  • Tommy Larsen
  • eUGENE
  • MHefny
  • Mark Harrison
  • Jean-Louis Naudin

Charles Linquist's Groups

Charles Linquist's Discussions

Can't compile for PixHawk on Windows

Started on Saturday 0 Replies

I'm using Windows7/32I used the instructions found at:…Continue

Tags: pixhawk, code, Compile

Can't graph telemetry logs

Started Jul 21 0 Replies

For many versions of MP, I cannot graph log files.   I can load and "play" the log files, but I cannot GRAPH the telemetry log files.I have tried several computers, removed and re-installed MP, but…Continue

Tags: Files, Log

Still can't graph logs in MP

Started this discussion. Last reply by Andre K. Jun 19. 1 Reply

I'm running Mission Planner 1.3.56. I have been unable to graph logs for some time.  I have upgraded with every release in an attempt to get this working again.  While I can't say exactly when the…Continue

Missing parameters in MP

Started Jun 8 0 Replies

I'm using the latest PixHawk firmware (I believe it is 3.5.5), and I want to adjust some parameters that don't appear in MP at all.  This is a multirotor quad.For example:  In the SERVO FUNCTIONS, MP…Continue

Tags: Parameters, Missing

 

Charles Linquist's Page

Latest Activity

Charles Linquist posted a discussion

Can't compile for PixHawk on Windows

I'm using Windows7/32I used the instructions found at:http://ardupilot.org/dev/docs/building-px4-with-make.htmlI downloaded the PX4 toolchain.exe file and installed it.Then, in "All Programs" I chose "PX4 Software Download", but got a bunch of errors.  So, I went to GitHub and downloadedardupilot-master     I changed the name to "ardupilot" and copied that into /c/users/<my…See More
Saturday
Tom Ferguson left a comment for Charles Linquist
"Charles, I tried to read through many of your posts on the 4G subject. I am sold on your plan to monetize your solution. If you are taking names to put on your customer list include mine. tferguson@netchino.com. Ideally I’d like to not use the…"
Sep 3
Tom Ferguson left a comment for Charles Linquist
"Please provide more specific UAV installation for pixhawk 2.1. If I have to subscribe to a service like you’ve set up provide a website or service information. I’m building a Tarot 810 with Reach + for RTK and Panasonic G4 for aerial…"
Sep 3
Charles Linquist left a comment for Tom Ferguson
"The Amazon server is necessary for two or three reasons:   Verizon doesn't accept incoming data connections.  You can't automatically send data to a cell phone without the cell phone "answering" the call and then…"
Sep 3
Tom Ferguson left a comment for Charles Linquist
"Why do you use Amazon server? Wouldn’t any server provider work? ie I have a shared Windows server service I use for my website and email. I can install other service and apps. Could that be used? However, why is this server even necessary to…"
Sep 2
Charles Linquist posted a discussion

Can't graph telemetry logs

For many versions of MP, I cannot graph log files.   I can load and "play" the log files, but I cannot GRAPH the telemetry log files.I have tried several computers, removed and re-installed MP, but NOTHING works!I need to be able to graph the logs.  Please help!I have reported this problem several times before, but have no solution.See More
Jul 21
Andre K. replied to Charles Linquist's discussion Still can't graph logs in MP
"Use APMPlanner2 it's much better and faster anyway."
Jun 19
Charles Linquist posted a discussion

Still can't graph logs in MP

I'm running Mission Planner 1.3.56. I have been unable to graph logs for some time.  I have upgraded with every release in an attempt to get this working again.  While I can't say exactly when the problem started, it was at least 3 revisions ago.  Attached is a screenshot of the error message.See More
Jun 18
Charles Linquist posted discussions
Jun 8
Charles Linquist replied to Lekhraj Rana's discussion Hybrid power system
"A couple of things to consider: A permanent magnet motor used as an alternator doesn't have a "field" winding to regulate the voltage. As a result, the output voltage will be almost directly proportional to the RPM, so if you want a…"
Jun 8
Charles Linquist replied to Charles Linquist's discussion STORM 32 Gimbal doesn't work
"I see the area where the problem lies.  When I use the DATA DISPLAY, the accelerometer outputs look normal, but when I use the CONFIGURATION TOOL, the first item -  "Determining Z axis" fails.  It sits there and times out…"
May 30
Charles Linquist replied to Charles Linquist's discussion STORM 32 Gimbal doesn't work
"I'm familiar with gimbal setup. I have 7 Alexmos boards and 3 Tarot 3D's. All of them at least TRIED to work as soon as I applied power. I bought the Alexmos as bare boards and built my own gimbals with my 3D printer. Even before…"
May 30
Greg Fletcher replied to Charles Linquist's discussion STORM 32 Gimbal doesn't work
"Well, you have some reading to do! Gimbals don't just work you need to calibrate the accelerometers, physicaly balance the gimbal mechanism, do an auto detect to get all the motors going the right way. And about the connections, I really…"
May 30
Charles Linquist posted a discussion

STORM 32 Gimbal doesn't work

I just received a 3-Axis gimbal with a Storm32 controller.  I loaded the GUI and find that the board has version 090 firmware.  The board is V 1.3.I can read and write to the board with the GUI.  I put a camera on the cradle and attached a 4S battery.All that happens is that the motors - more or less "lock in place".  They obviously have some current because they "cog".  When I remove the battery,  the cogging goes away.I was going to update firmware using a USB <->RS-232(TTL) board, but…See More
May 30
Charles Linquist replied to Charles Linquist's discussion Telemetry and HD video over 4G
"I use a Raspberry pi running SER2NET, AUTOSSH, WVDIAL, and a few other programs. The switchover between 4G and RFD900 is done in a separate T EENSY processor.  The TEENSY handles a lot of object avoidance stuff too, since it understands…"
Apr 17
Ivan R replied to Charles Linquist's discussion Telemetry and HD video over 4G
"not speaking for OP, but with the Navio2 board I do this today with MavProxy via TCP, with Mavproxy you can multicast to different tagets"
Apr 17

Profile Information

About Me:
Electrical Engineer
Please tell us a bit about your UAV interest
Have 2 quads
Hometown:
Campbell, CA

Comment Wall (5 comments)

At 4:17am on November 13, 2017, Sebastien said…
Hello Charles, Im looking to connect my pixhawk via a raspberry to mission planner. I see that you did it. Could you tell me What kind of server do you instanciate to communicate between raspberry and mission planer ? An amazon aws ? Thank you !
At 9:51am on November 13, 2017, Charles Linquist said…

It gets fairly complex, but - in the Raspberry, I used SER2NET, and connect the serial port of the Raspberry to the telemetry port of the PixHawk.  I plug a VERIZON 4G/LTE "dongle" into the USB port of the Raspberry.  In the Raspberry, I use WVDIAL, pppd and AUTOSSH to make the connection to an Amazon ec2 server via the 4G link..

The Amazon server is running a reverse SSH tunnel.  

On the ground side, I have another 4G/LTE "dongle" plugged into my laptop (but you could use a 'hot spot'), I then set up Mission Planner to use a tcp connection to the Amazon ec2 server using only the 
Amazon server's name and the appropriate port number.

The connection from the 'copter' to the Amazon server is secure, but the connection from that Amazon server to my laptop is not.  I'll change that soon.  I'll use another Raspberry on the ground to create a secure connection to the Amazon server and connect the Raspberry to my laptop via USB.  I need a Raspberry on the ground anyway, because I have designed a "failover" system and PCB which seamlessly switches between 4G and 915Mhz telemetry on both ends.  Both ends (air and ground) transmit simultaneously on 4G and 915Mhz. Both ends pick which source is best at any time and use that source.  Mission Planner cannot switch between two sources of telemetry/control, but the Raspberry can.  The Raspberry picks between validated sources and sends data to MP using one connection method and one data rate.

At 9:11pm on September 2, 2018, Tom Ferguson said…
Why do you use Amazon server? Wouldn’t any server provider work? ie I have a shared Windows server service I use for my website and email. I can install other service and apps. Could that be used?
However, why is this server even necessary to control a drone over 4G Lte?
At 5:43pm on September 3, 2018, Tom Ferguson said…
Please provide more specific UAV installation for pixhawk 2.1. If I have to subscribe to a service like you’ve set up provide a website or service information. I’m building a Tarot 810 with Reach + for RTK and Panasonic G4 for aerial photos.
At 8:16pm on September 3, 2018, Tom Ferguson said…
Charles,
I tried to read through many of your posts on the 4G subject. I am sold on your plan to monetize your solution. If you are taking names to put on your customer list include mine. tferguson@netchino.com. Ideally I’d like to not use the RPI3 on the aircraft, if there is another way. For instance by using the onboard Edison on the Pixhawk 2.1. Of course I’d like to see the GC packaging and the aircraft side.
BTW the Parrot Disco and Bebop have a mod to use 4G there is a YouTube video of a guy flying across one of the Channels between islands in Hawaii. Let me know how I can follow you.

You need to be a member of DIY Drones to add comments!

Join DIY Drones

 
 
 

Groups

Season Two of the Trust Time Trial (T3) Contest 
A list of all T3 contests is here. The current round, the Vertical Horizontal one, is here

© 2018   Created by Chris Anderson.   Powered by

Badges  |  Report an Issue  |  Terms of Service