Yes, thinking on it I’ve seen both Ray and Shane’s test, so you’re likely right.
If I had a power meter I’d run their test myself, but I’m just not that ambitious. 
There have been some problems w/the Neo2 and its new cadence hardware/sensor. How much of that is Zwift vs Neo, I am not sure.
In the context of Zwift, wattage is everything. Hence, my comment:
“So the Neo must be wrong! As we all know, the power meter w/the higher number is always right 
”
If using a left only power meter (e.g., Stages, 4iiii, Pioneer, etc…), power measurement is not as accurate as I illustrated with a bit of math.
That said, I am not knocking the Neo or the 4iiii. I have a Neo. It has been great. Power numbers line up w/my on bike power meters (2 diff bikes w/their own power meters). While I do not own a 4iiii PM, I believe they make a great product as well. As a side note, I do have their Viiiiva HRM which I use for its ANT+ to BLE bridging function.
If you have a power meter on your bike, I suggest you use that power meter both indoors as well. Why? Because then you indoor and outdoor power numbers are both consistent and meaningful.
Apologies for the mild thread hijack. Hopefully, Zwift and/or Tacx have worked out this cadence issue.
Any news about the latest FW? Still is it the 0.0.19 Beta?!?
I haven’t heard anything. Not sure if there’s issues under the Garmin ownership now but I sure wish they’d get it fixed.
Everything fixed for you guys? Been a month since anything posted here.
I’ve been trying to get a cadence sensor working for months on this and still no luck.
I have an Android - Samsung Galaxy S10+ that I use Zwift and connect to.
I literally just sold off my Garmin Cadence Sensor and accidentally broke my Wahoo Cadence Sensor trying to get it open. Now I’m in the market for another. Does one play nice with the Tacx Neo 2 more than others?
Thanks for your help!
Jimmy
Why not use the cadence directly from the Neo2 
Hello,
That does connect to Zwift, but doesn’t seem accurate whatsoever. Also, sometimes when I stop briefly it doesn’t connect again for the rest of the ride, which makes for a funny visual when my guy doesn’t pedal but still moves based on power alone I don’t understand how that works, it’s built into the trainer? It’s worth mentioning I have a handcycle (aka handbike) which may not work well for it either.
Thanks for your help,
Jimmy
The Neo has built in cadence. When on the pairing screen and pairing cadence, you should see the Neo listed. Are you using Bluetooth or ANT+? I ask because I believe the Neo2 supports ANT+ FEC. If using ANT+, you will want to select this option. Also, in the TACX app you should disable ANT+ which disables plain old ANT+. No, this does not disable all ANT+, only the plain old vanilla version of ANT+. I know, it’s a bit confusing.
Edit: conveniently found this video discussing the ANT+ vs ANT+ FEC settings courtesy of @GPLama
Zwift doesn’t actually use your cadence to move the bike. Movement is strictly based on power input. If you do not pair a cadence sensor, your avatar will still move using Zwift’s estimated cadence which could be spot on or totally off in left field.
Lastly, make sure you are running the latest version of Zwift. Also, make sure your Neo2 firmware is updated.
All, Tacx has their head firmly planted up their ass on this one. Although what Shane is saying is not completely incorrect it not entirely accurate.
The cadence sensor for the Neo is located at the non drive side right by the logo. If your crank is not long enough to pass by this spot with every pass of the crank arm, your cadence will not be accurate.
Each Neo 2 will behave differently for a user. My Neo 2 only works on version 0.15 of the firmware. If I try to use 0.18 or 0.19 Beta I get no cadence.
Also using Bluetooth of any sort on my Neo 2 no matter what The firmware version, I get no cadence or power. My device only works on version 0.15 and only on Ant+. And also only when I strap a piece of metal to extend my crank arm.
In the attached photos you can see where my crank arm was too short and when I attach a piece of metal it extends the arm so it passes over the area by the logo. With this setup my cadence is perfect.
Until the Ant+ connection drops, but that’s another story.
Tacx support is working on the problem and has sent me an external cadence sensor until they find a solution.
Some people’s Neo 2 works on Bluetooth others work only on Ant+. Some people have success with version 0.18 production release others don’t.
The Neo 2 is simply F’d up at the moment. And who’s going to resolve it. Garmin? The old Tacx team??
I’m certainly not confident in either right now, but I know they’re doing their best.
Wow! I remember seeing your post about this before. I figured by now it would have been sorted. What length cranks do you use?
Odd that BLE doesn’t work at all. Sounds like they should ship you a new unit instead of an external cadence sensor.
Wait. What? I’ve made a video showing how to disable ANT+ Private broadcasting of Speed&Cadence and Power from the Neo 2. Leaving ANT+ FE-C and Bluetooth to do their thing.
I don’t recall anywhere in the linked video making mention of the cadence accuracy on the Neo 2.
However on that topic - I haven’t encountered any major dramas with the Neo 2 cadence. YMMV, and apparently does.
Sorry Shane, agreed, you make no mention of cadence accuracy. My comment was misplaced. Not sure what I meant at the time.
I did go back and look at all your videos on the Neo 2.
My bad.
The cranks I use are 165. I had hip issues a number of years back and have never taken the time to swap back to longer cranks.
This is my reason:
Neo 2 cadence just isn’t reliable. I’m using my Garmin crank-based cadence sensor again.
Hello,
Here’s a picture of my setup. Like I said, it’s a handcycle (aka handbike) so the sensor near the motor definitely wouldn’t work for the hand cranks.
Based on the feedback, I just will continue without a cadence sensor until a fix happens.
Thanks!
Jimmy
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I fully see your point now. If you put on a piece of metal long enough to reach the sensor you definitely would be neutered if not completely gutted.
The concern id have for the hand bike is it ever getting proper cadence from the Neo. I don’t remember. Have you tried an external cadence like the garmin, Wahoo etc?
That looks fast 
It looks like your best bet would be to go with an external cadence sensor. If you do not pair cadence at all, how is the Zwift guestimate?
When using the TACX Utility my Cadence sensor is reporting as Orange, any idea what that means? (firmware 0.18)
I’ve never seen this. Didn’t find a search on it.
Do you have a picture or screen shot?
1 Like
I would send the screenshot to Tacx support. That icon looks like an integrated circuit (IC). Thus, it could mean there is a faulty chip.
