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Beginner
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HDOP and VDOP value 100.0 while outdoors

Hello,

I can't get the gps to lock, how do I know GPS is working properly?

Thanks,

Daniel

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Community Manager
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Hello Daniel,

 

 

Thank you for your interest in our Intel products.

It's hard to know which the root cause of the issue might be. Could you provide some additional information so that I can provide you a better assistance? Please let us know the following:

  1. Which firmware version are you using?
  2. When did you begin to notice this issue (out-of-box, after a firmware update, after a crash)?
Additionally, I recommend you to double check that the antenna is correctly positioned and the wire connections are properly connected.

 

 

I would suggest you re-flash the latest firmware version and make sure the BIOS, FPGA and Flight Controller are updated as well to the latest version: https://downloadcenter.intel.com/product/97178/Intel-Aero-Compute-Board

 

 

Hope this helps.

 

 

Regards,

 

Octavian
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Beginner
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Hi Octavian,

You actually just helped me out on the accelerometer problem haha

Thanks for that!

  1. Which firmware version are you using?

I reflashed the firmware an awful lot of times in order to solve that problem so I guess I have all the latest configs:

BIOS_VERSION = Aero-01.00.13

OS_VERSION = Poky Aero (Intel Aero linux distro) v1.6.1 (pyro)

AIRMAP_VERSION = 1.8

FPGA_VERSION = 0xc2

Aero FC Firmware Version = 3.5.3

  1. When did you begin to notice this issue (out-of-box, after a firmware update, after a crash)?

We did not test it out-of-the-box, so I wouldn't be able to answer that one. When we received it, we went straight to a manual flight test, in which we DID notice the drone was tilted when flying and would not respond to neither RTL or pos hold. Nevertheless, we continued trying to calibrate it via controller trims and eventually crashed the drone.

Is there any way to test antenna integrity? I'm quite sure both connections and antenna position are ok.

Thanks!

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Community Manager
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Hello Daniel,

 

 

You can quickly check if GPS coordinates are received by FC.

 

 

SSH to Aero shell.

 

 

Copy the mavlink_shell.py to /home/root

 

a. You can find mavlink_shell.py here at https://github.com/PX4/Firmware/tree/master/Tools

 

 

Then login into FC shell( nsh>) using the following command

 

a. ./mavlink_shell.py 0.0.0.0:14550

 

 

Run the FC shell command: listener vehicle_gps_position

 

 

It will show lat: lon: and other GPS parameters like hdop, vdop..etc.

 

 

Regards,

 

Octavian

 

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Beginner
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Hello Octavian,

Just ran the command and got this results:

nsh> listener vehicle_gps_position

TOPIC: vehicle_gps_position instance 0 # 1

timestamp: 224963876

lat: 0

lon: 0

alt: -17000

alt_ellipsoid: 0

s_variance_m_s: 135.6610

c_variance_rad: 3.1416

fix_type: 0

eph: 4294967.5000

epv: 3750032.5000

hdop: 99.9900

vdop: 99.9900

noise_per_ms: 94

jamming_indicator: 128

vel_m_s: 0.0000

vel_n_m_s: 0.0000

vel_e_m_s: 0.0000

vel_d_m_s: 0.0000

cog_rad: 0.0000

vel_ned_valid: False

time_utc_usec: 0

satellites_used: 0

Daniel

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Community Manager
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Hello Daniel,

 

 

Since the compass was calibrated it means the GPS should be connected. Please try to restart the GPS in the shell command line using these commands:

 

gps stop

 

gps start

 

Then run the command "gps status" and please provide us with the output of this command.

 

 

Also, please check if other gps devices are able to obtain signal at your location.

 

 

Regards,

 

Octavian
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Beginner
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This is the output, runned it twice just be sure. About GPS signal, my cellphone was able to detect about 7-8 satellites but the drone detected none...

Thanks again,

Daniel

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Community Manager
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Hello Daniel,

 

 

Are you having the same issue in Ardupilot? I know you said it worked normally there on the other thread. Is that the same case here or are you also having GPS issue in Ardupilot?

 

 

Regards,

 

Octavian
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Beginner
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Actually, yes... same problem.

I was trying to solve one problem at a time so at the time I thought I wasn't get any signal because I was indoors, but further testing showed me it was some kinda problem with the GPS itself

Daniel

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Community Manager
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Hello Daniel,

 

 

There must be something wrong with the GPS module itself. I would suggest you purchase a replacement.

 

Spare parts can be found here: http://shop.yuneecusa.com/Aero-Drone-GPS-compass-module http://shop.yuneecusa.com/Aero-Drone-GPS-compass-module

 

 

Regards,

 

Octavian
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Beginner
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Ugh, okay....

Thanks again!!

Daniel

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