Extracting telemetry log

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RC-Concepts May 7, 2019 at 8:48pm

In Mission Planner, the settings for Tlogs are simply not granular enough to opt out logs that we don’t need. In the end, I settled with the DataFlash Log, simply because I could untick all the checkboxes except for “GPS” and “Current” (which I need) under the Log_Bitmask in the Standard Params page in Mission Planner. The *.log file now only has the GPS lines and the current/voltage sensor lines, it's so much ‘cleaner’ but I only want the GPS values and the voltage value. Hence, I wrote a script in Python to parse the GPS lats and lons, as well as the volts which are in fact the RSSI readings on my 5.8ghz video receiver which RSSI pin is hooked up to the APM's voltage detection pin. After getting these 3 variables, I coded a couple more lines to display a graphical plot of all the GPS coordinates within a pop-up Window. Here’s a demo video. http://www.tinyurl.com/apm-gps-plotter

Virgil said:

Leonardo,

Thanks for the response. I was able to extract the GPS coordinates in the format you described in your response; however, is there a way to get the format in a cleaner/nicer format?

Thanks,
Leonardo Campos Inocencio June 28, 2016 at 4:36pm

The data is there, but what you see is a format mask for the data. It´s easier to export the data as GPX since all the information it´s right there, as "<trkpt lat="-29.71479714725" lon="-51.2822437992893"><ele>135.57</ele><time>2014-07-26T11:39:02-03:00</time><course>0</course><roll>0</roll><pitch>0</pitch><mode>Unknown</mode></trkpt>" for example.
- Virgil > Leonardo Campos Inocencio June 28, 2016 at 10:30pm
  
  Leonardo,
  
  Thanks for the response. I was able to extract the GPS coordinates in the format you described in your response; however, is there a way to get the format in a cleaner/nicer format?
  
  Thanks,
  - Leonardo Campos Inocencio > Virgil June 29, 2016 at 12:09pm
    
    I don´t know. Usually this way is easy enough to extract the coordinates, i really don´t know if there is a easier way.
3D Robotics

Chris Anderson June 28, 2016 at 12:09am

Are you connected to Pixhawk vis MAVlink?
- Virgil > Chris Anderson June 28, 2016 at 12:34am
  
  Yes, I am. I can get the text file, but I am interested in just latitude, longitude, and time.
  
  Thanks
  - 3D Robotics
    
    Chris Anderson > Virgil June 28, 2016 at 12:41am
    
    I'm confused. You first said you couldn't get the tlog, and now you say you can get the tlog but it's got too much data?
    - Virgil > Chris Anderson June 28, 2016 at 3:44pm
      
      Sorry for the whole confusion and thanks again for the response. This is what I am able to do. I am able get the text file and convert it to a CVS file. When I opened it in Excel, I do get to see a lot of data, but the GPS coordinates are not there. I tried to follow the following link I found in the forum -- http://diydrones.com/forum/topics/extract-gps-data-from-pixhawk-log. But still, I am not able to get any GPS coordinates. In mission Planner, I set log bitmask to GPS.
      
      The main parameters I would like to extract are GPS coordinates and time stamp. Any idea what I might not be doing right? I am using Pixhawk.
      
      Thanks

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Extracting telemetry log

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