Hello, I’m currently trying to send an ultrasonic thickness gauge sensor reading as a Mavlink message through the companion computer up to the ground station (running QGC). The sensor outputs serial data which I’m parsing with Python into a float value with optional metadata, but I’m struggling to …

Here’s the summary Companion computer Read & Send Script Make a script in the ~/companion/tools/ directory that: Connects to the top computer (requires QGC to be open) Gets sensor data (float) Sends the data in a named_value_float message e.g. import time from pymavlink import mavutil def wait…

Hi @EliotBR , Thank you for reporting your progress! You could use mavlogdump to check where your messages don’t match the ones sent by the ROV. I’d take a look at the sysID and CompIP fields as QGC could be using those.

No worries - forums work best when later viewers of posts can refer to useful work and solutions that have already been gone through, including the mistakes that were made along the way. I’m hoping this will be a useful reference for others looking to do something similar in future, and am planning …

Timing difference is now just the small difference between when the two scripts start, which may be problematic for accurate timing later but should at least still allow the readings to display because they’re quite close together. That didn’t solve the issue unfortunately, but one less major thing …

Hi @EliotBR [image] EliotBR: I got one of the .bin log files off the pixhawk, That is actually a Dataflash Log. It doesn’t have mavlink communication, so it is not very relevant to your use case. This seems to work here: from pymavlink import mavutil master = mavutil.mavlink_connection('ud…

[image] williangalvani: That is actually a Dataflash Log. That’d make sense, thanks! Absolute legend! I needed source_system=1 it seems. Thanks for sticking through with me until this got sorted out! :smiley: I was pretty excited when I heard QGC talking to me :stuck_out_tongue:

Very nice! Thank you for this! Do you mind if we put this on our docs at ardusub.com (with proper credits)?

Not at all, I want it to be as useful as possible :slight_smile: Thanks again for all the help getting it to work in the first place :slight_smile:

I have tried your @EliotBR code and got this error connecting to localhost via udpin on port 14540 waiting for confirmation... connection success! Traceback (most recent call last): File "main.py", line 40, in <module> master.mav.named_value_float_send( File "/home/***/.local/lib/python3.8…

Hi @mhcekic , welcome to the forum :slight_smile: I wrote and posted this code while working for a different company, but it did definitely work at the time. What kind of setup are you using? [image] mhcekic: connecting to localhost via udpin on port 14540 This specifies you’re connecting t…

Hi, I followed @EliotBR 's guide for my sensor and have it working nicely, so thank you! However, we are transitioning our systems to a Navigator/Blue OS setup, and I was wondering if it is possible to reuse the script and settings I used on my Companion computer on my BlueOS computer. If not, do yo…

Adding a sensor to mavlink stream

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