Adding to the discussion here. Looks like lots of good detective work by the users! I’ve screenshot a number of possibilities. Will reply if any work. But just should Zwift have their eyes on, my set up is Tacx Neo 2T, iPad Air running iOS 12, and Garmin dual hrm. These worked with my kinetic trainer last winter, so I upgraded my trainer looking forward to using Zwift again this winter, but I am unable to get he data in game, only no signal. Have tried many of the possibilities in this thread already with no success. Have also emailed the Zwift experts to see what they’ve got. Fingers crossed and will use my Fenix for now(good idea that). Cheers!
Hi Community,
Thanks for your comments as it saves time.
Setup: IPhone XR (ZC+Garmin APP) +AppleTV (Zwift APP)+Kick Core+Garmin HRM DUAL+Garmin 830 Edge.
My setup has been working for 2 weeks and then stopped. Garmin Edge has been reading and after the issue still reads the Heart Rate from the HRM.
Tried commented stuff (not IPhone reset), reviewed IPhone Health stats/privacy, update to 14.3 with no solution.
Workaround:
Disable the “connect with Zwift Companion” in the AppleTV Zwift APP, so the IPhone does not work as a Bluetooth bridge and now Zwift APP shows heartbeat reading!. Start the ZC after pedaling (BTW, In Settings–General–Companion: I disabled Mobile Data; to force ZC use the same network = WiFi).
Did a training for 1hrs and worked properly.
Will keep an eye at this forum as hopefully someone will be able to reproduce the issue and find the proper solution.
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Hi everyone!
I will add tonight’s experience to the mix in case it can help someone else.
Thanks @Orinucu_River for the idea to not use the bridge connection via the companion app. Tonight I made sure my android phone would not see the Garmin dual HRM and then turned on my Apple TV. Without the connection via the companion app, I was able to connect the Kicker Snap and cadence sensor, but when I tried adding the HRM, the Apple TV could “see” it and I could connect, but got no signal. I then unpaired the cadence sensor and tried to connect the HRM instead. That worked 
!!! So then I thought the cadence sensor probably wouldn’t pair (since that would be too many things for the Apple TV), but strangely, it worked. The cadence sensor also paired and I rode my workout without incident. All data came through and uploaded at the end. It makes no sense to me, but I am just going to take it and run – or take it and ride! We’ll see whether it works tomorrow…
Edit: As I posted already below, this did not work again. Sigh.
All - Had the same issue where my Garmin HRM-DUAL was working fine for months and then mysteriously stopped presenting the BPM # on the device (ZWIFT, WAHOO, etc…). Did everything folks are sharing and the only solution is to reset the device to factory settings (iphone/ipad/etc.) and start from scratch - yes, reinstall ALL your apps. Not sure what drives the conflict, but it’s not a ZWIFT or WAHOO issue… Hope this helps and thanks to those that shared their experience and solve!
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Hi @Tay_Catlett,
Does that mean that you have to reset and reinstall once and then everything is good again? Or reset and reinstall before each workout?
After being able to connect and ride just fine on Sunday, I tried the same procedure yesterday and it didn’t work 
. The next thing I guess I will try is the 4iiii Viiiiva HRM that should hopefully pair itself and cadence to the AppleTV . I wonder whether the Wahoo Kickr Snap pairs to the TV as one device or two? Sigh. It was so nice when everything just worked…
I just factory reset my iPhone and manually installed the apps today and my GARMIN HRM-DUAL now shows BPM#. Hoping I don’t have issues in the future so will be careful as I install new apps and grant them certain permissions… but will only know with time. I changed some permissions in relation to my health devices and apps on my iPhone, not sure what it was…, but thinking that could have caused the bug. I don’t run ZWIFT through apple TV, so I can’t speak to that. Good luck and hope it works out.
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Viiiiva HRM - I have used one for years w/an Apple TV. It’s awesome!
Whatever is bridged from the Viiiiva will count as one connection. If you have an ANT+ power meter on your bike and use the Viiiiva, the power meter and HR will be via the same single Bluetooth connection.
The Snap connecting directly to the Apple TV is one connection, even if you use it for power, controllable, and cadence.
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Hi @Beth_Klawun
Thanks for this thread link. Read it through and I guess you still haven’t got the solutions 
I have the exact same issues that you are facing when I used the companion app as a bridge. The Companion App installed on my Android phone. I have tried a few methods as described above, for example using the same Wi-Fi network for my Apple TV and the companion app but it’s still doesn’t work.
I have tried to connect Garmin Dual HRM, Trainer, and Cadence Sensor directly to my Apple TV. The Garmin Dual HRM works well, able to detect and display perfectly. But then I have to sacrifice my cadence sensor since my Apple TV only supports up to 2 BLE connections. I guess I have to continue with this setup for now
I also use Zwift run on my Android phone frequently. I am facing the same issues now with Garmin HRM, connected but no signal. I have to connect the HRM to my Garmin 735xt watch to get my readings. So i guess it is not only the companion app but it is the zwift app that might cause the issues OR probably Android connectivity.
I will try another setup, Windows and the Ant+ Dongle both on Zwift ride and run. Will share my findings soon. 
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Hi All
My Garmin Dual was working fine for a month. No Signal started two day’s ago. I reset the app had a heart rate for a couple of seconds, NO SIGNAL.
Zwift just released a update on IOS.
“Improvements to Bluetooth pairing to reduce the chances of users getting “No Signal” when pairing a device.”
I’ll keep you posted if there is a improvement.
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Hi @Jan_van_Dyk!
Any luck for you with the update? I see in other new threads that some people are now joining the “no signal club” due to this latest update… I can’t wait to see whether the update has made things better or worse (or maybe things will stay the same). Also, do you have an Apple TV and use the companion app?
Fingers crossed for everyone!
Beth (with Garmin Dual, Apple TV, Wahoo Kickr Snap)
Having suffered with the dreaded “No Signal” I downloaded the latest update of Zwift…still “No Signal” 
Hi All,
I may have a solution for the Apple TV users who have this problem. I determined for my setup at least that the problem is with the connectivity via the companion app. All the sensors paired fine and worked when not used thru the app. So now I purchased a 4iiii Viiiiva heart rate monitor, which I spent the morning setting up. First you pair it to your phone, then use that to pair the cadence sensor to the HRM. Then unpair the HRM from the phone and pair it to the Apple TV. At first the cadence didn’t pair, but I started a ride to see whether the data was coming through anyway (it wasn’t). I then went from the ride into the in-game pairing screen where the Viiiiva showed up under cadence sensors. I was able to click that and viola! It works! Hopefully all will pair nicely when I go to do my workout this afternoon… We shall see!
Also, I had tried again yesterday to see whether the bluetooth fix in the latest update solved the issue for me with the Garmin HRM. It did not.
Beth
Edit: Zu früh gefreut 
. I could see the cadence sensor and there was a signal, but I couldn’t get it to register over 60rpms in spite of clearly being much faster. Massive sigh. Switched back to the Garmin HRM and recorded it on my Edge. Sigh.
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So the latest update from Zwift fixes the “No Signal” by just removing the message…but heart rate still isn’t being picked up 
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No fix for you guys here but what I can tell you is how to spot the symptoms of a dying Garmin HRM Pro chest strap ( mine was only 3 months old) with Zwift.
Mine started with intermittent “No Signal” warnings on the pairing screen which I had to unpair then pair again to get it going. Then you’ll start to notice cyclic dropouts in HR readings during your ride. Usually mid-ride and a cluster of around 10 drops with 20 seconds between each one.
Then the death blow will be when you decide to change the battery “just in case”. Say farewell to your chest strap if you waited a minute before inserting the new battery and it never comes back on. Mine didn’t.
Plenty of other folk out there in a similar situation where they die after a replacement battery.
Moral of the story, spend your money on a Polar H10 ( If you only need 1 Ant+ connection) or Wahoo Tickr Gen2. I’ve owned both and have been flawless with Zwift and TrainerRoad ( I transmit to both apps at once when using a chest strap via Ant+). Luckily I kept hold of my Gen2 Tickr and it’s been faultless lately on Android & PC + dongle versions of Zwift.
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You mean 1 Bluetooth connection 
.
I did the same, because no fix of this bug, I’ve buyed a Polar H10 for my morning HRV readings with HRV4Training on my iPhone 12pro.
The HRM Dual in combination with my IPad Pro, work’s already.
A lot of people dont know to insert the new battery in reverse for a few seconds, then put it back in the right way - that is how Garmin HRM’s are reset.
Same issue for me on one of my HRM Dual straps (my wife’s one gets the ‘no signal’ or connects via bluetooth without displaying the reading. Ant+ all fine on both straps, and mine has no issues at all. Very keen to figure out why one strap works when the other one doesn’t. I’ve replaced the battery, disconnected it from other devices etc etc.
I have the same problem. HRM Dual connects to my Garmin fenix 5s, everything works fine, battery is relatively new. In the Zwift app on my iphone the HRM Dual is connected but shows 0 bpm. Please fix it urgently
So I got an old iPhone out that is running an older version of Zwift and guess what…my Garmin HR connected just fine. I have also contacted Zwift support direct and they sent me a long list of things to try…none of which worked. The answer lies in the recent releases of Zwift
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that’s great for you if you still have an old zwift version. would like to undo my last update