Varia Series - Recent Threads

RE: Varia rear View 820 Radar Error

Zoli — Fri, 31 Jul 2026 18:00:03 GMT

changrenyong

Sorry, it looks like the reply button just add a new comment instead of marking a reply. Anyway.

Since I updated the firmware of the Varia 820 I rode about 10 hours without any issue. No radar disconnect, no issue at all.
And MyBike Traffic is enabled (and updated).

Once I fihish the training I always switch off the computer then the radar. At the next training I switch on the radar then the computer.

Varia rear View 820 Radar Error

L. La Marca — Wed, 18 Mar 2026 16:34:43 GMT

I am seeing radar errors when riding. The error is "Radar Error, Radar Data Stale, Disconnected". If I touch the screen on the 1040, the error disappears and the radar appears to operate normally; threats are again displayed. The error appears at least twice an hour, sometimes more

I am running 6.34 on the Varia 820 and it's connected to a Edge 1040 Solar on software Beta 30.18 (1CA41AA835)

RE: Varia rear View 820 Radar Error

changrenyong — Fri, 31 Jul 2026 17:06:46 GMT

Well, I spoke too soon. I just started getting the radar error after I powered the Edge 1040 solar on and left it next to my desk. The MyBikeTraffic data field is not enabled.

RE: Varia rear View 820 Radar Error

changrenyong — Fri, 31 Jul 2026 16:53:57 GMT

I have done two rides since disabling the MybikeTraffic ConnectIQ data field. The radar error has not occurred. I have also intentionally turned on Edge 1040 solar, with the RearVue 820 next to it, to see if the error would show up. Previously, the radar error would sometimes appear even before I start an activity.

For those who are seeing this radar error, are you also using the MyBikeTraffic ConnectIQ data field?

RE: Varia rear View 820 Radar Error

changrenyong — Wed, 29 Jul 2026 22:01:08 GMT

I'm trying with the MyBikeTraffic ConnectIQ data field disabled (ie, not using it on any data screen) first for a few days. I get that error on almost every ride so if I don't see that after half a dozen rides, it might be safe to conclude the error has something to do with the MyBikeTraffic data field.

RE: Varia rear View 820 Radar Error

Cristox — Wed, 29 Jul 2026 21:58:13 GMT

Try it

RE: Varia rear View 820 Radar Error

changrenyong — Wed, 29 Jul 2026 21:57:22 GMT

I also have an Edge 840 and I don't recall ever seeing this error on it. So for me, the error is only occurring when using the 1040 Solar. If the Varia app is potentially the cause of this error, I should also be seeing that on the 840.

RE: Varia rear View 820 Radar Error

Cristox — Wed, 29 Jul 2026 21:45:33 GMT

Try to unpair your phone from the 820 and see if the errors persist.

Is suspect having both the edge and the phone paired at the same time causes the errors.

Maybe you have to reset the 820 and then just pair it to the edge, to let it fully forget the app pairing

[quote userid="738416" url="~/sports-fitness/cycling/f/varia-series/433267/varia-rear-view-820-radar-error/2049589"]you have to have the Varia app running on the phone in order to hear the audible radar warnings[/quote]

That's not true.

You have audible warnings from the head unit.

Unless you disabled them.

RE: Varia rear View 820 Radar Error

changrenyong — Wed, 29 Jul 2026 19:38:59 GMT

Your Edge bike computer is not giving you audible radar warnings? I always make sure the Varia app is not active - not even in the background. One peculiarity that I have encountered several times is even with the Varia app not being active, sometimes i still get the audible radar warnings from my iPhone! It is as though the Varia app started on its own and was running in the background even though it was no longer presented on the list of iOS apps that had been opened.

RE: Varia rear View 820 Radar Error

L. La Marca — Wed, 29 Jul 2026 19:28:22 GMT

I was using the Rear Vue 820 before the update came out for My Bike Traffic that included the newer radar units. The error existed then so I don't think the IQ data fields is the issue. But, to your point, you have to have the Varia app running on the phone in order to hear the audible radar warnings. Does anyone use the 820 without the app open and still get the radar errors?

RE: Varia rear View 820 Radar Error

changrenyong — Wed, 29 Jul 2026 19:00:25 GMT

What was your idea?

RE: Varia rear View 820 Radar Error

Zoli — Wed, 29 Jul 2026 18:53:14 GMT

That was my idea.

My story. 1040 solar, the most recent firmware.

Newly bought 820 with an okder firmware. Okder as mybiketraffic measured Wrong speed.

Then I updated the firmware. After 1040 restart it recognized the 820 again as a light. So it did not report approaching objects, However measured the speed on mybiketraffic data field.

I deleted the device and connected as radar.

And that point I saw 3-4 error message you may talk about. But it can be in connection with the firmware upgrade. So I am not sure this is relqted to that data field. Also developer may have heared the issue.

I used New fw for about 4 hours and haven't experienced any other issues.

I suspect a firmware issue either or both 1040 (and other computers) and 820.

RE: Varia rear View 820 Radar Error

changrenyong — Wed, 29 Jul 2026 17:23:04 GMT

For those encountering this error, are you using any ConnectIQ data field? I am using MyBikeTraffic data field that interacts with the RearVue 820. I will try removing the MyBikeTraffic data field to see if I still get the error.

Preparing Garmin Varia RCT 715 video clips for video creation

nc3man — Wed, 29 Jul 2026 02:27:22 GMT

I wrote a Windows 11 script that may help anyone stitch together hundreds or more 30 second Varia video clips into one continuous video. This saves a ton of time when creating long videos where it is cumbersome to load in many clips separately to your favorite video editor for merging. You may download Fix-Stitch_Garmin-Videos.bat . The header explains how to run the script. The script is short so you can check this won't harm your system; use any script with caution. Note that you must have ffmpeg installed. If not on your system, "winget install --id Gyan.FFmpeg" in a Powershell will install and make ffmpeg.exe available to your system.

RE: Varia rear View 820 Radar Error

Garmin - KS — Mon, 27 Jul 2026 21:13:32 GMT

Thank you both! changrenyong It looks like you've already been in touch with Garmin Support on this, which is excellent! Your experience has already been added to our ongoing investigation.

Cohen2501 I just sent you an email requesting some additional information. Please be sure to reply directly to that email if you have any questions.

RE: RearVue 820 not compatible with 3rd party bike computers

changrenyong — Mon, 27 Jul 2026 18:44:13 GMT

I suspect the issue is with your IGPSport bike computer. I have used the RearVue 820 with Garmin Edge 840/1040 Solar and two prototype bike computers that I cannot name. The radar only goes into standby mode when the paired bike computer is powered off. In fact, I actually encountered an issue with the RearVue 820 NOT going into standby mode after I powered off the Edge 1040.

RearVue 820 not compatible with 3rd party bike computers

Nineplanets — Sat, 25 Jul 2026 18:38:12 GMT

Hi!

I have an issue with a combination of a bike computer and a radar/light (they are combined radar/light). The bike computer is a IGPSport BSC300T. The radar/light is a Garmin RearVue 820 (StVZO). The radar and light are connected to the bike computer using ANT+. The garmin is running firmware version 6.70.0 and the IGPSport is running firmware version V1.24. Both of these are the latest firmware. Now to the issue. Sometimes the Garmin goes into some form of "standby mode", where the light and radar is turned off. I know it's not completely off because there is a blue blinking light on the Garmin radar. According to this link (www8.garmin.com/.../GUID-EA7CCEA7-3C12-459B-94DA-42F88B9E551F.html ), that indicates that the device is in standby mode. It says "NOTE: The device automatically goes into standby mode after you turn off your connected bike computer. You can press the device button to reactivate the device.". But my bike computer is not turned off! It can happen in the middle of a ride.

It seems the bike computer tells the RearVue to go to standby mode (how? No idea it’s possible using ANT+)?

Talking with ChatGPT, I believe this is done using the light protocol. Unfortunately, this puts the whole Garmin device into standby mode, and the BSC300T never tells the Garmin to go out of standby mode again.

My question is;

Is there a way to disable the "standby"-mode in the Rearvue 820? So that it NEVER goes into standby mode? Right now the RearVue 820 is completely unusable for me because of this standby mode.

RE: RearVue 820 not compatible with 3rd party bike computers

simonf00 — Mon, 27 Jul 2026 15:58:22 GMT

I don't work for Garmin and have no knowledge of their processes, but as someone who works on commercial software myself, I think you're going to be out of luck on this one. Think about what you're asking for. First they would need to modify working code in a way that is probably not trivial and introduces risk. Giving "options" is never simple and often introduces bugs in very unexpected ways. Second, the change would require that the new implementation does not comply with the ANT+ standard that they themselves developed. Third, and most importantly, the change in functionality does not help their product at all, it's to help a competitor's product function properly, because of the competitor's poor implementation of the ANT+ Radar specification. Could they do this? Sure. Is it likely they would do this? If I was the product manager in charge of this are at Garmin, it would be 100% not a chance. Just my $0.02.

RE: RearVue 820 not compatible with 3rd party bike computers

Nineplanets — Mon, 27 Jul 2026 03:37:04 GMT

Might be. The issue is that the iGPSport say that they officially only guarantee compatibility with their own radar, so there is no help from that side either.

I'm not sure what the purpose of the ANT+ standard is when devices of different brands don't always work with each other anyway.

I was hoping there was (or Garmin could add) a way to completely disable the option for the device to go to Standby-mode in order for it to support bike computers that strictly don't work as the Garmin computers. The manual only says that it goes into standby-mode when the bike computer is turned off, which I guess can leave some interpretation for the bike computer manufacturers to screw it up.

RE: RearVue 820 not compatible with 3rd party bike computers

simonf00 — Sun, 26 Jul 2026 17:03:26 GMT

This is probably more of an iGSport issue than a RearVue issue. I use mine with a Wahoo ELEMNT ROAM bike computer and have no issues.

Varia vue after 5.80 updates not recording video,only light work

Nerka105 — Sun, 26 Jul 2026 16:59:55 GMT

The update took a very long time about 12h and the battery was hot,after updates work only light ,no video record,varia app and Pc not found vue, garmin edge found vue, but only light function.When turn on vue flashing white led and only light works,no video record red led turn on.I try many times reset but after 10sec not flashes led .Before updating with 5.70 everything worked fine.Maybe you can help?Thanks

RE: Varia rear View 820 Radar Error

Cohen2501 — Sat, 25 Jul 2026 02:00:47 GMT

Experiencing the same issue that has been occurring over the last few weeks.

Date I experienced the issue (most recent): 7/25/2026

Edge 530 (SW 9.75)

RearVue 820 (SW 6.70.0)

RE: Varia rear View 820 Radar Error

changrenyong — Fri, 24 Jul 2026 22:30:58 GMT

Verified the first four items.

Date I experienced the issue: 7/24/2026 15:27 (Pacific standard time)

Edge 1040 Solar (SW 31.33)

RearVue 820 (SW 6.70)

I turned on the Edge 1040 Solar and it connected with the RearVue 820 that was situated right next to it. Within a few minutes, the errors started appearing. This was before I even started an activity on the Edge 1040 Solar.

No specific pattern as to when/where/why the errors occur.

RE: Varia rear View 820 Radar Error

Garmin - KS — Fri, 24 Jul 2026 20:42:24 GMT

Hello everyone,

We're continuing to investigate reports of the "Radar Error / Radar Data Stale / Disconnect" message that some users have reported while using the Varia RearVue 820. If you are currently experiencing this, please first verify the following:

The software on your paired Edge device is fully up-to-date.
The software on your Varia RearVue 820 is fully up-to-date.
Power both the Edge and RearVue 820 completely off, then power them back on.
Remove (unpair) the RearVue 820 from the Edge and then pair it again.

If the error continues to occur after completing the above steps, please reply with the following information:

The date(s) you experienced the issue.
The model of Edge device you are using.
The software version installed on your Edge device.
The software version installed on your RearVue 820 (this can be checked through the Varia app or Garmin Express).
A description of what occurred when the error appeared.
Any patterns you've noticed (for example, specific ride durations, traffic conditions, startup methods, weather conditions, etc.).
Any troubleshooting steps you've already attempted.

The more details we can gather, the better we can understand the circumstances under which this occurs and continue our investigation. Thank you for your assistance!

RearVue 820 remained active even in standby mode

changrenyong — Fri, 17 Jul 2026 19:31:06 GMT

A few days ago I had fully charged the RearVue 820. I remember turning on my Edge 1040 Solar to see if I could update its firmware and turned if off a few minutes later. For some reason, I think the RearVue 820 did not go into standby mode as it's supposed to when its paired device - whether a bike computer or the Varia app - is powered off or not running (as in the case of the Varia app). Radar threat mode on the RearVue 820 appeared to be engaged every so often by flashing even though the taillight remained off the entire time. The following day when I wanted to actually go for a ride, I noticed the LED was already blinking red, indicating a low battery status. And indeed, not long after starting the ride, I received a low battery alert on the Edge 1040. The RearVue 820 is on the latest firmware version 3.70 and I remember seeing similar issue in a five-month old discussion that has since been locked.