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BUG: wrong power meter data

It looks like there is a bug with (cycling) power meter related data on my Forerunner 255.

On my road bike I use a single sided Favero Assioma power meter. When I compare the power meter data on my Forerunner 255 with my Edge 830, all power data on my Forerunner seems to be halved. Which basically means that I currently cannot use my Forerunner for cycling training/intervals etc.

This also seems to be feeding through other calculations like training load and performance condition.

Anybody else had this same issue?

0 5135968 over 2 years ago

I use an Assioma Duo and that works fine.

Are you sure you have paired by ANT as power is passed verbatim, no doubling is needed.

0 Valentino7881 over 2 years ago in reply to 5135968

Yes, connection is with ANT.

0 5135968 over 2 years ago in reply to Valentino7881

Strange! Its sounds as if somehow your 255 is dividing power by two as the pedals transmit power correctly as you have confirmed with your EDGE.

0 5732774 over 2 years ago in reply to 5135968

Can you see the power disbalance and efficiency during the activity or after it?

0 Valentino7881 over 2 years ago in reply to 5732774

I don't know and didn't check because I delete the excercise on my Forerunner (I only use it as a second screen).

However, I tried two things: deleting the old sensor connection and reconnecting; and I turned on the option within the Assioma app to double the power data. And it now seems to work correctly!

The strange thing here though is that this Assioma app setting should only impact a sensor connected via bluetooth. And I am 100% sure that I use an ANT+ connection (I checked this on my Forerunner).

0 5135968 over 2 years ago in reply to Valentino7881

Valentino7881 said:
And I am 100% sure that I use an ANT+ connection (I checked this on my Forerunner).

While you say you you are 100% sure, I think you used a BT connection - this is why I asked if you used ANT earlier.

Remember these pedals transmit ANT and BT so I think you did use BT or rather you 255 chose it for some reason.

It is a shame you deleted the activity as that contains sensor info ;)

To avoid it using BT again, pair as BT then disable the connection so in future it will always use ANT

0 5135968 over 2 years ago in reply to 5732774

5732774 said:
Can you see the power disbalance and efficiency during the activity or after it?

Good idea but the 255 does not support this sort of thing...