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GPS altitude in GUI and GPS logs is reported incorrectly, with Quadrino and Quadrino GPS, appears to be at least 3300 metres out. #22

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
What steps will reproduce the problem?
1. Connect to Quadrino
2. Wait for GPS fix
3. See incorrect altitude

What is the expected output? What do you see instead?
An altitude a lot higher than I expect. Have uploaded example kml file. During 
that log, I wouldn't of flown much higher than 50 metres. And the starting 
altitude would've been at ground level.

What version of the product are you using? On what operating system?
Version 2.1. Windows 7 64bit

Original issue reported on code.google.com by verti...@gmail.com on 9 Jan 2013 at 12:05

Attachments:

GoogleCodeExporter commented 9 years ago 
What version of MultiWii, what version of i2c-gps-nav ? and what type of gps 
module?
Please check it in standard MultiWiiConf is it displayed correctly ?

Original comment by eosba...@gmail.com on 9 Jan 2013 at 12:31

GoogleCodeExporter commented 9 years ago 
Version 2.1. Not sure on i2c-gps-nav. Its a quadrino GPS module - 
http://flyingeinstein.com/index.php/quadrino/quadrino-gps

Can check that, will get back to you.

Original comment by verti...@gmail.com on 9 Jan 2013 at 12:33

GoogleCodeExporter commented 9 years ago 
Just checked it's not reported correctly, therefore I'm assuming the issue 
might be within MultiWii's handling of the the Quadrino GPS output?

Original comment by verti...@gmail.com on 9 Jan 2013 at 12:57

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GoogleCodeExporter commented 9 years ago 
It is a code bug in the Quadrino gps firmware,. in line 849 of I2C_GPS_NAV.INO 
you have to divide the alt with 100 "i2c_dataset.altitude = 
venus_ctx.location.sealevel_alt /100; "

Original comment by eosba...@gmail.com on 9 Jan 2013 at 1:15

GoogleCodeExporter commented 9 years ago 
Thanks for finding that, will pass it on.

Original comment by verti...@gmail.com on 9 Jan 2013 at 1:16