A new update for your Zwift Hub is ready! Install the latest firmware now to get a helpful new feature: auto-calibration. Upgrading your firmware is easy. Open the Zwift Companion app, and you will see a prompt that a firmware update is available. Having trouble finding it? You can also check and update the firmware by navigating to ‘More’ > ‘Zwift Hardware’ and then selecting your trainer. A video and written guide on how to update your firmware can be found here. What’s included in the version 4.0 Zwift Hub firmware release? Auto-calibration optimizes the accuracy of the power reading from your Zwift Hub and happens automatically during rides. This works similarly to a manual Spin Down Calibration. After the first minute of riding, auto-calibration will be triggered at any moment during your activity when you coast for at least 5 seconds from a speed of at least 15 kph / 10 mph. So next time you’re pausing for rest, freewheeling down a hill, or coasting to a stop at the end of your ride, your Zwift Hub will be automatically optimizing itself. Firmware will be available to all Hub owners in phases over the next week. UPDATE March 27 2023 Hub firmware v 4.0.1 has begun rollout. Fixed HR pairing bug. Calibration accuracy improvements. v4.0.1 is available today if you’re already using v4.0.0. v4.0.1 will roll out in phases if you’re using v3.9.

Managed to revive and update my Hub with the help of another smartphone. Glad it is now on 4.0.1 and it connects to the Zwift App again!

The directions they are giving go counter to almost all software debugging workflows and a process where a mobile device can screen time out and brick a unit is a critical design flaw.

Yeah that’s what happened to me. I was lucky I reopened it and was able to resume from where it stopped. Pretty poor.

I’ve had my hub about a month. The hub had an issue from the get go in that every ride – literally 100% – required me to start, then I received a no signal message inside of three seconds, then exit the ride, reconnect, and start over. It worked on the 2nd attempt to start each time, so while annoying, I could use it. I wasn’t sure if it was a hub issue or a software issue, so I decided I could wait for a patch. Yesterday, I got the message that there was a firmware update. I was hopeful that this would solve the issue and attempted to upgrade the firmware. The firmware update started but failed to complete and sat at 0% with a ‘disconnecting’ status on my notifications and red light on the device. It stayed like this for 20 minutes or so before I force quit the app. I tried it several more times. Same result. Start, almost immediately goes to the disconnecting, never changes. I tried uninstalling and reinstalling the companion app (support tells me this was my mistake – never do this – despite this being what anyone who has worked with debugging software issues knows is up there as the first thing to do). Chat support was worthless. They sent me the “have you tried” web pages. I tried those again, or those I could, as the ‘don’t uninstall the companion app’ was too late [this is a serious design flaw if this is such a significant problem] and somewhat contradictory to the their “uninstall and reinstall the game” suggestion for clearing user data. I told them none of that worked. They told me they were transferring me to another support level, but that just sat there forever waiting for someone to come on. I emailed support. They send sent me the same instructions that I received from chat. I emailed back. I’m waiting… Sadly, slightly more than a month else I would just return the paperweight for a refund and buy from a reputable hardware company with real support. I really enjoyed Zwift but it feels like I made a terrible, terrible mistake buying the hardware from them.

couple of questions… how are you connecting? BT or ANT? have you looked at different interference issues that can occur with those two connection types?

Assuming you’ve followed this? The 2nd to last post? [image] Zwift Hub Flashing Red Light Zwift Equipment Hey all - our engineers have been investigating why some of the returned units did not take the v4.0 firmware update as expected. Thanks for flagging it up to us quickly so we can get to the bottom of things. I’m crossposting this information to this thread to highlight a few details before updatin…

I’m using Bluetooth. It’s not an interference issue. I have a Bluetooth scanner. The only device showing up on the scanner is the hub, but it won’t send data and won’t connect to the companion app.

Are you sure the hub is not paired to your BT scanner?

Yeah, that’s what I mean Milan, with BT only connecting to one device I sometimes forget to turn off my phone BT and it pairs with that before the computer.

Hi, yesterday i Start the Firmware Update 4.0.1 with the Companion App for my Hub. The Update Starts normal and shows 100% done. This message are visible for 20 minutes. After 20 minutes i rebootet the App and the Hub. So that was no good idea. Now the Hubs Blue light is on and the companion app Shows the firmware version 0.0.0 for the hub. In the Zwift App is the Hub connected but no signal is displayed. Have everyone an idea? Thanks

Zwift Hub Autocalibration [Firmware v4.0]

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Stuart.Middlecoate (Stuart Middlecoate) April 17, 2023, 10:59am 83

Assuming you’ve followed this? The 2nd to last post?

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Zwift Hub Autocalibration [Firmware v4.0]

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