I ran into an issue today where my gear shifts didn’t change the resistance on the kickr core v2. It was during a robopace ride and worked fine the day before. Power and cadence were working like normal. Everything seems to be connected ok in the pairing screen.
Anyone have an idea what would cause this issue?
Freshly received kickr core 2 here and same issue. High resistance, 2000 watts without pushing much (93 RPM)…
I have seen this a few times over the past months. Never consistent and seems fine now. What I was able to do was jump off trainer, unplug power brick from trainer, wait a few seconds plug back in and jump back onto bike. Not ideal though relatively quick and no need reconnect. It seemed reconnect immediately and I only needed a short chase to return to the group. There was no pattern to the loss of control?
It was working again today. Had it unplugged for a while, didn’t do anything else. I did have the wahoo app open yesterday just before my ride. Not sure if that maybe could cause zwift to not be able to control the resistance, as the trainer was connected to the wahoo app first.
Unplug from wall outlet or from rear of trainer. It does make a difference. I’ve ridden with wahoo app connected and not connected at various times. Though I never saw a difference in when the resistance flatlined. I found you don’t need unplug power from rear of trainer for more than a few seconds to restore the trainer reaction to terrain and shifting inputs.
Did not unplug from rear of trainer, will give that a try if I come across this issue again. Thanks!
I am back to having V2 wifi issues again, and stuck in 1 gear. I have been experiencing this since the Oct update. It happened again partway through the 11am Stage 1 - Zwift Camp: Build and I was spinning out trying to sprint, stuck in 16th gear.
After that I quit and did the climb of the week and it was still an issue after unplugging the trainer. Had to choose bluetooth to finish that ride so I had some gears. After riding I checked on the Wahoo app and the trainer is connected through wifi to the network.
I also tried a spindown because I have never done one of this new unit and it failed twice after the 3min warmup.
Sounds like i have exactly the same issue with Core 2.
There is a new firmware version for the Core 2 with improved Wi-Fi connectivity. I rarely have a dropout, but maybe it’s gone completely now. And I can connect the Zwift Ride Controllers to the Core 2 via the Kickr Bridge, but they do not appear in Zwift.
I’ve been suffering from Wifi dropouts ever since I bought the Zwift ride with Kickr Core 2. They don’t happen every ride, but last week I had a dropout in ZRL as I reached the top of the NY reverse KoM.
As others have said here, I got stuck in one gear. Zwift registered my gear change. I could see the virtual gear change on screen, but it had no effect on the Kickr Core 2 resistance. Yesterday morning, another failure on the climb of the week. This time stuck in too big a gear and had to abort the climb.
I saw the firmware update was available last night and downloaded it 20 minutes before this week’s ZRL race. No drop out this time, but there’s no information on the Wahoo website other than ‘improved Wifi connectivity’. No idea what they’ve done and whether it fully addresses the problem,
I had raised a support ticket with Zwift as I’d bought the ride bundle. Zwift’s reply was ok, but really what you’d expect from a 2nd line team at the start of an investigation, ie connect to the Wahoo app, check resistance, make sure there is no local radio interference, etc.
Being a rather sad retired network engineer, I spent some time going through the process of connection to Wifi and to Zwift. I sent the details to Zwift after they had replied to me. I’ll post them below, just in case they help anyone by confirming their experience.
My response to Zwift Support:
My trainer is in my garage. My wifi is a mesh system, with the nearest disk in the house, just the other side of a pathway between house and garage.
Normally, the signal in the garage is good, between 2 and 3 bars, but it can drop to 1 very occasionally.
After sending my initial fault report, I tried the log in to Zwift process again. The Kickr Core 2 successfully connected via wifi and then I used the Zwift log in screen to connect direct to the Apple TV for my HRM and the Zwift controllers on the Zwift bike. All was done successfully.
I knew that the HRM signal and controllers continued to work when I had the problem in my ZRL race. It was clear the problem was the connectivity of the trainer via wifi.
So, I ordered an additional mesh wifi disk for my garage, which is now connected via Ethernet back to my main router.
I added the disk, and tried the configuration on Thursday last week and everything worked ok. Clearly, I need to test this over a longer period of time, but no problems on first use.
However, I accidentally replicated the probable wifi problem when adding the new disk.
There is a process to follow when adding a new disk. It goes through a cycle where it powers up and then adds itself into the existing mesh. There is an LED on the disk which follows a colour process, which is purple on power up, flashing blue as it meshes in and then steady blue when the disk is fully connected to the mesh.
I logged in to Zwift just after the disk had turned steady blue, but part way through the log in, the disk unexpectedly went through its power cycle again, which disconnected the Kickr Core 2 from Zwift. As this 2nd wifi cycle completed and the wifi connection was restored, I tried to reconnect the Kickr Core 2 to Zwift. Clearly, the Zwift app thought it could see the Kickr, the log in screen told me it was connecting, but it never did. This was exactly what happened when I tried to reconnect the trainer after it disconnected during my ZRL race.
To reconnect, i had to exit Zwift, power down the Kickr Core 2 and start again.
I think this suggests that when there is a wifi failure between Zwift and a Kickr Core 2, connection to the Zwift app is permanently lost and it is impossibel to reconnect without shutting everything down and starting again. I don’t know how long the break has to be, but both in the race, and when I added the new disk, the same problem could be seen.
Additionally, as the Zwift app thinks it can see the Kickr Core 2 when I tried to connect after the ZRL and new disk failures, it suggests that something is wrong in the handshake between the Zwift app (running on Apple TV in my case) and the Kickr Core 2. I’m guessing the problem is at the Kickr Core 2 end. It feels like it may be retaining a state that says it is already connected to the Zwift app and so it ignores any attempts by the Zwift app to reconnect.
You may want to retest this yourself and possibly discuss with Wahoo, to find a solution to this issue. You may also wish to advise users of this as a potential issue and how to resolve, as well as advising people to make sure they have a good wifi signal in the area their trainer is sited.
I’m happy to answer any questions you have. Hope this report is helpful to you.
PS!
Last night before ZRL, I had another interesting twist on this. The Kickr Core 2 had somehow connected to a distant mesh disk, even though the new disk in my garage was about 2 metres from it! I’m unsure why The Kickr Core 2 would choose a more distant disk than the one literally next to it. Maybe something needs addressing here as well? It may be the only way to be sure of this not happening is to take the new disk out of the mesh and re-instate it as a dedicated node with a separate network id.
I seem to be having many similar issues. My Wahoo app doesn’t show a wifi connection, but my wifi’s app shows the trainer is connected. I’ve also had dropouts where the resistance stopped changing regardless of what gear I’m in (Zwift cog) or gradient I’m on.
I’ve contacted both Zwift and Wahoo support. Zwift was useless. Wahoo at least got back to me for some follow up, but it’s been a week and I have no idea if they’re doing anything now.
I just had the same issue. Suddenly 0 watts and the shifting stopped working too. I’m trying it with Bluetooth now. Apparently, Race Mode works with Bluetooth as well, but only with Zwift.
Same thing for me. The kick core 2 received last months, I have the issue twice. First minutes, the resistance is so high without pushing (2000w and 80 km/h).
I restarted a lot of times. After 20 minutes it works.
I checked the firmware update too with the Wahoo app.
Same ■■■■ here to!!It is a bummer to race when the watt outputt is 30-40watt harder then normal!!!
Hi, so basically you keep on plugging/unplugging until it works ? I’m going crazy with this device, after a forced break I returned yesterday on my core2, it worked at first even if during a race it peaked at 900W for a few secs on its own. I unplugged it this night and wanted to ride this morning…and got back to 1800w, it’s unusuable. “Ride On” they say 
Hello,
I tried something : Issue confirmed: Wi-Fi Direct Connect + Apple Watch causes power spikes in Zwift.
Bluetooth-only on Mac works perfectly.
The KickCore 2 is connected only with Bluetooth not WiFi. I don’t use Zwift app on the Apple Watch.
Please make sure that your TRAINER is connected only to 1 device at a Time…Wahoo Trainers can have multiple connections but they will fight to control the resistance of the trainer.
I use Core 2 since October and from the Firmware update that made the NEW Spindown possible i had no issues and trainer is pretty much spot on with my 2 pair of Assioma Duo Power meter Pedals.
I use Bluetooth connection for Zwift and WIFI is disabled to have no interference.
Is this a new update?
NO that’s the November update that introduced the NEW Spindown option on Core 2.
Thanks for the tips about connectivity and to make sure it is only connected to one device, I’ve tried today to do this and it seems to work so far -hope it stays like it if I do not change my setup.
To sum up for potential readers with issues, mine was that I had very high watts without any effort (up to 2000w easily).
Setup with issue : my Kickr Core 2 was first connected to the Wahoo App (iOS) : Bluetooth + Wifi, firmware updated. I got the Zwift app as well, then I downloaded Zwift on my Mac as well.
Given the tips that said you had to keep only 1 device connected, I decided I would use Zwift on my Mac.
I opened Wahoo app, forgot the Kickr Core 2 that was connected. I removed it as well from my bluetooth connection in iOS settings. I unplugged/replugged my device and when I launched Zwift on my mac watts were correct.
If on the contrary you decide to use your mobile phone only, I guess you’ll have to delete your trainer from your pc/mac. To do so, search “Resetting your game preferences” on zwift support webpage.
I find it sad that it is not possible to use it on different device, like sometimes I’d like to plug my phone on my TV, sometimes I’d just do it on my laptop.