Tacx Neo 2 & Garmin Edge 1000 Speed Sensor

General discussion about the ANT+ Trainers

Moderators: mcorn, Tacx Moderator, malfukt, Nasz

mcorn
Moderator
Posts: 8152
Joined: Fri Nov 24, 2006 8:55 pm
Location: USA, Bellingham, Washington

Re: Tacx Neo 2 & Garmin Edge 1000 Speed Sensor

Post by mcorn » Wed Dec 05, 2018 11:49 pm

FE-C intensity control means varying the resistance of the brake.

User avatar
Alex Masalovich
Moderator
Posts: 2076
Joined: Sun Nov 30, 2014 10:17 pm
Contact:

Re: Tacx Neo 2 & Garmin Edge 1000 Speed Sensor

Post by Alex Masalovich » Thu Dec 06, 2018 12:08 am

What follows from this? Does this indicate in what units Neo broadcasts speed data?
Тренируйтесь много, отдыхайте ещё больше!

mcorn
Moderator
Posts: 8152
Joined: Fri Nov 24, 2006 8:55 pm
Location: USA, Bellingham, Washington

Re: Tacx Neo 2 & Garmin Edge 1000 Speed Sensor

Post by mcorn » Thu Dec 06, 2018 12:19 am

The ANT+ Device Profiles guide on Bike Speed, Bike Cadence, Combined Bike Speed & Cadence, states in section 5.5:

"The bike speed sensor data provides only direct measurement of the number of wheel revolutions. Using the measurement time information an accurate estimate of speed can be made."

User avatar
Alex Masalovich
Moderator
Posts: 2076
Joined: Sun Nov 30, 2014 10:17 pm
Contact:

Re: Tacx Neo 2 & Garmin Edge 1000 Speed Sensor

Post by Alex Masalovich » Thu Dec 06, 2018 12:26 am

Please be more attentively:
viewtopic.php?f=60&t=35419#p210840
Please justify that this has to do with Neo.
Neo is not a speed sensor.
Тренируйтесь много, отдыхайте ещё больше!

mcorn
Moderator
Posts: 8152
Joined: Fri Nov 24, 2006 8:55 pm
Location: USA, Bellingham, Washington

Re: Tacx Neo 2 & Garmin Edge 1000 Speed Sensor

Post by mcorn » Thu Dec 06, 2018 1:02 am

The Neo is an ANT+ compliant device. It is not proprietary. All ANT+ speed data is in the form of wheel revolution pulses.

The Neo is listed on the ANT+ website as FEC, Bike Power, and Bike Speed/Cadence compliant:

https://www.thisisant.com/directory/neo-smart/

Similar to the ANT+ specification quoted above, the ANT+ Device Profile for Bicycle Power states in section 9.6:

"To calculate speed and distance, the receiving device requires knowledge of the wheel circumference in meters. This value
is entered by the user."

So, actual wheel speed must necessarily be computed by whatever device (PC, mobile app, bicycle computer) receives ANT+ wheel revolution information.

I have assumed Bluetooth works the same way.

And as I said above, in a way that apparently bores you, TDA does not care what the actual over the ground wheel speed is as it calculates speed virtually. However, one of the profile settings for a TDA user is tire circumference. I am not entirely sure what TDA does with this. Perhaps it is used in the warm-up or cool-down. I am not really sure.

User avatar
Alex Masalovich
Moderator
Posts: 2076
Joined: Sun Nov 30, 2014 10:17 pm
Contact:

Re: Tacx Neo 2 & Garmin Edge 1000 Speed Sensor

Post by Alex Masalovich » Thu Dec 06, 2018 10:23 am

It's not very convincing for me.
mcorn wrote:
Thu Dec 06, 2018 1:02 am
All ANT+ speed data is in the form of wheel revolution pulses.
The Neo is listed on the ANT+ website as FEC, Bike Power, and Bike Speed/Cadence compliant:
Smart roller trainers are also designated as FEC, Bike Power, and Bike Speed/Cadence compliant:
https://www.thisisant.com/directory/genius-smart/
https://www.thisisant.com/directory/bus ... art-t2780/
https://www.thisisant.com/directory/vortex-smart-t2180/
What are the "wheel revolution" for these trainers?
What about the treadmill?
mcorn wrote:
Thu Dec 06, 2018 1:02 am
Similar to the ANT+ specification quoted above, the ANT+ Device Profile for Bicycle Power states in section 9.6:
What does the ANT+ Device Profile for FEC say?
Why don't you provide a link to the source of the text?
Тренируйтесь много, отдыхайте ещё больше!

mcorn
Moderator
Posts: 8152
Joined: Fri Nov 24, 2006 8:55 pm
Location: USA, Bellingham, Washington

Re: Tacx Neo 2 & Garmin Edge 1000 Speed Sensor

Post by mcorn » Thu Dec 06, 2018 3:22 pm

Alex Masalovich wrote:
Thu Dec 06, 2018 10:23 am
Why don't you provide a link to the source of the text?
You have to have an ANT+ account in order to get access to the technical documents.

If you are interested, you can probably create an account and gain access.

User avatar
Alex Masalovich
Moderator
Posts: 2076
Joined: Sun Nov 30, 2014 10:17 pm
Contact:

Re: Tacx Neo 2 & Garmin Edge 1000 Speed Sensor

Post by Alex Masalovich » Thu Dec 06, 2018 5:07 pm

I thank you for the opportunity to participate in the dispute with you.
mcorn wrote:
Thu Dec 06, 2018 1:02 am
However, one of the profile settings for a TDA user is tire circumference. I am not entirely sure what TDA does with this. Perhaps it is used in the warm-up or cool-down. I am not really sure.
It is possible that this is a preparation for connecting the basic trainers through the Tacx speed and cadence sensor using virtual power technology.
Тренируйтесь много, отдыхайте ещё больше!

mcorn
Moderator
Posts: 8152
Joined: Fri Nov 24, 2006 8:55 pm
Location: USA, Bellingham, Washington

Re: Tacx Neo 2 & Garmin Edge 1000 Speed Sensor

Post by mcorn » Thu Dec 06, 2018 6:02 pm

Alex Masalovich wrote:
Thu Dec 06, 2018 5:07 pm
I thank you for the opportunity to participate in the dispute with you.
mcorn wrote:
Thu Dec 06, 2018 1:02 am
However, one of the profile settings for a TDA user is tire circumference. I am not entirely sure what TDA does with this. Perhaps it is used in the warm-up or cool-down. I am not really sure.
It is possible that this is a preparation for connecting the basic trainers through the Tacx speed and cadence sensor using virtual power technology.
I'm not completely sure. It's possible that some of the TDA functions do not use any form of virtual speed calculations. For example, when you are on the Device page and test a connected Device, such as speed reported by a brake or a speed sensor, you will get a number readout. That may be something that has no virtual speed calculation, so a tire size would be needed to compute a speed number. Some of the non-film functions may not use virtual speed as well.

User avatar
Alex Masalovich
Moderator
Posts: 2076
Joined: Sun Nov 30, 2014 10:17 pm
Contact:

Re: Tacx Neo 2 & Garmin Edge 1000 Speed Sensor

Post by Alex Masalovich » Thu Dec 06, 2018 11:26 pm

mcorn wrote:
Thu Dec 06, 2018 1:02 am
All ANT+ speed data is in the form of wheel revolution pulses.
Alex Masalovich wrote:
Thu Dec 06, 2018 10:23 am
It's not very convincing for me.
I withdraw my objections regarding broadcasting the speed data on the profile "Bike Speed and Cadence".
Тренируйтесь много, отдыхайте ещё больше!

Robshell01
Posts: 1
Joined: Sun Jan 06, 2019 12:44 pm

Re: Tacx Neo 2 & Garmin Edge 1000 Speed Sensor

Post by Robshell01 » Sun Jan 06, 2019 12:50 pm

2200mm is the size I found to work.

I have a Tacx Neo and Garmin Edge 1030 and want to ensure speed and distance match as close as possible to Tacx.
I set my wheel size on the garmin against indoor trainer profile at 2200, this gets very close to within .1 mph on my setup.
I tried everything from 2088, 2096 for wheel settings up to 2500 at 2200 it matches the best I could acheive.
Running on iPad Tacx App and Ant+ dongle from whoo with apple adapter to 30 pin.

Post Reply

Return to “Tacx Bushido/Vortex/Genius/Neo”

Who is online

Users browsing this forum: No registered users and 18 guests