Forum menu
Strava experts..?
 

[Closed] Strava experts..?

Posts: 91168
Free Member
Topic starter
 
[#5082542]

I've got an old skool wired powertap, and I've been using Strava on my phone to track rides. I don't suppose anyone knows a way of adding the power data to the ride..?


 
Posted : 19/04/2013 3:43 pm
Posts: 5938
Free Member
 

you need a power meter...

Strava do try and work out power, if you have a cadence sensor, but I would guess it's very unreliable


 
Posted : 19/04/2013 3:55 pm
Posts: 91168
Free Member
Topic starter
 

I have a power meter:

I've got an old skool wired powertap


 
Posted : 19/04/2013 4:00 pm
Posts: 0
Free Member
 

Most things about strava are unrelaible, like when I beat a mate up a climb by some margin, and his iPhone gives him a better time than my Android gives me.

It doesn't matter, I won, but it's annoying.


 
Posted : 19/04/2013 4:00 pm
Posts: 251
Full Member
 

Most things about [s]strava[/s] [i]using a gps device with a poor sampling rate & accuracy[/i] are unrelaible

ftfy ๐Ÿ˜‰

I think the trick is going to be to attach the relevant power readings to each gps sample that you have. Could get complicated.


 
Posted : 19/04/2013 4:03 pm
 mrmo
Posts: 10720
Free Member
 

if you have a file with time stamps from both the gps and the power meter i guess it is theorectically possible to create a single file. You would need to know what Strava needs the file to look like to work though. What are the correct line headers in the GPX/TCX you would have to create.


 
Posted : 19/04/2013 4:08 pm
Posts: 39735
Free Member
 

your android probably thought you were still climbing the hill due to a poor gps chip set.

my iphones pretty close to the forerunner 305.

me and my edge fell out the other week as it had me crossing a river twice during my ride- piece of craps in 3 bits now.

looking at replacements now.


 
Posted : 19/04/2013 4:08 pm
Posts: 0
Free Member
 

Interesting question. You'd need to upload both files and then meege them. Not possible in Strava as I know so I'd look at TrainingPeaks or similar.

I updated the software in mine to be Ant+ but it was wireless to begin with.


 
Posted : 19/04/2013 4:17 pm
Posts: 71
Free Member
 

Yes you'll struggle to do that frankly. Probably a case of upgrading to wireless ANT+, then either getting an ANT+ dongle for your phone, or using a different head unit.

Does it really matter though? Unless you're using Premium it adds nothing special, and presumably if you've had a PT long enough to still have a wired one you have some better software for analysis and what not.


 
Posted : 19/04/2013 4:21 pm
Posts: 5938
Free Member
 

I have a power meter:

I've got an old skool wired powertap

๐Ÿ˜ณ I read that as laptop...

I believe the only way to do it is with an ANT+ power meter.


 
Posted : 19/04/2013 4:31 pm
Posts: 0
Free Member
 

You could probably use SportTracks to combine the files. Then export to a TCX file or similar, and upload to Strava.

Though it will depend on how well the files are synchronized. ie do they start at the same time, and is the time accurate.


 
Posted : 19/04/2013 4:46 pm
Posts: 71
Free Member
 

I would expect there'd be enough discrepancies that it wouldn't really help!


 
Posted : 19/04/2013 5:26 pm
Posts: 91168
Free Member
Topic starter
 

Probably a case of upgrading to wireless ANT+

Oh ok then, where's my fat bundle of cash sitting around doing nothing?

๐Ÿ˜‰

Some kind of trickery might be required.. I may have to get coding.


 
Posted : 19/04/2013 5:33 pm
Posts: 0
Free Member
 

I've got the usb type dongle if that's any good to you?

Make a great geek project


 
Posted : 19/04/2013 5:39 pm
Posts: 91168
Free Member
Topic starter
 

USB dongle for which bit?


 
Posted : 19/04/2013 5:43 pm
Posts: 0
Free Member
 

The actual hub, unscrew the plastic non drive side cover and there is an interface. The dongle was a once only operation but the geek in me says it should be hackable


 
Posted : 19/04/2013 5:49 pm
Posts: 91168
Free Member
Topic starter
 

Wait.. you mean a dongle to convert wired to wireless?!

๐Ÿ˜ฏ

Yes, definitely interested!

What do you mean once only operation?


 
Posted : 19/04/2013 6:13 pm
Posts: 71
Free Member
 

I believe it was for a firmware update, but you may be able to hack it to make it transmit wirelessly. That could be bollocks though.


 
Posted : 19/04/2013 6:19 pm
Posts: 91168
Free Member
Topic starter
 

I've considered a wireless hack. You can apparently get ANT+ transceivers, I reckon you could figure out how the wired data was transmitted. I'd start with an oscilloscope, see if it's some kind of pulse-width setup. If I were designing something like that I would not go to the trouble of encoding it digitally at the hub end - keep all the electronics in the computer.


 
Posted : 19/04/2013 6:24 pm
Posts: 0
Free Member
 

PM me your address and I'll dig it out once I'm back home


 
Posted : 19/04/2013 8:02 pm
Posts: 0
Free Member
 

Eat fewer cakes. ๐Ÿ˜‰


 
Posted : 19/04/2013 8:06 pm