Just picked up a Wyze Duo Cam the home depot version that does not include the wifi chime. I installed the unit with the bypass there is no hum/buzzing coming from my mechanical chime. The doorbell will not use my mechanical chime when pressed so I ordered the chime controller from wyze which should ship shortly.
I did notice my Wyze Duo Cam device (the actually doorbell) does hum/buzzing though. Is this due to a power issue?
The duo cam has the battery installed but it is hardwired.
I just checked my transformer is 16v 10va.
Welcome to the Forum, @dasilvamiguel86! 
I don’t have Duo Cam Doorbell but have done troubleshooting with other Wyze doorbells that I’ve used wired with Chime Controller (Video Doorbell v2 and Battery Video Doorbell) just to give some background. I understand that you’re still waiting on Chime Controller’s arrival to install that, and that’s definitely something you’ll want to use if you intend for your Duo Cam Doorbell to actuate your home’s mechanical chime. Based on what you’ve written so far, I imagine you’re currently using the included Jump Wire to connect the FRONT and TRANS terminals in your chime box (or something similar).
The rating you’re describing for your transformer should be adequate for Duo Cam Doorbell. What output do you measure from the transformer, though? If you have a multimeter, then I’d be interested in knowing what AC voltage you see when measuring at the transformer and also at the wires where you installed the camera. I don’t yet know what’s happening, so I’m trying to understand more about the setting of the problem.
I’d also be interested in knowing whether or not Duo Cam Doorbell’s battery is charging/maintaining its charge while connected to your low-voltage AC.
Since this is a new product for you, what did Support say when you contacted them? I’m wondering if it’s just bad and in need of replacement.
What were you using prior to installing Duo Cam Doorbell? Was that working as expected?
I am using the jump cable to cut off the mechanical chime when the wyze duo doorbell button is pressed. When I do not use the jumper cable in the chime box, there is a buzzing or hum coming from the chime box which from what I have read is normal when there is not enough power in the circuit. I forgo to mention in my chime box I have a front and back doorbell connected, the front is the one being replaced with the wyze duo doorbell.
I used a multimeter to take the current voltage of my transformer:
As mentioned the transformer in my home is 16v 10va. I decided to replace the transformer with this one:
The wyze duo doorbell now using my mechanic chime when the button is pressed. I also obviously removed the jump cable and there is no buzzing or humming. The chime does sound similar to what it was when I was using my original one button doorbell but it might be a bit off.
I ordered the wyze chime controller before deciding to replace the transformer so it’s in its way. My question is should I still install the chime controller?
Thanks,
To answer your most recent question, I would still install the Chime Controller when it arrives following the standard wiring method. If you read other accounts in the Forum of Duo Cam Doorbell use with a home’s mechanical chime but without Chime Controller installed, many of those users report buzzing, humming, or other unwanted sounds from their chime boxes, including “phantom” rings when nothing should’ve been detected by Duo Cam Doorbell. Installing Chime Controller reportedly mitigates this and seems to be the accepted solution.
Now I have a question: With your Duo Cam Doorbell currently wired and with the Jump Wire removed, are you saying that the device itself is no longer humming or buzzing? The impression I got from reading your initial posts was that the unwanted sound was coming from the Duo Cam Doorbell device itself, not the chime box, so I’m trying to understand the evolution of your situation.
Having a multimeter for your own testing is excellent, and I appreciate the photo! 
Is that measurement from your new (16 V AC, 30 VA) transformer or your previous (16 V AC, 10 VA) transformer? I think replacing that should be fine and might help since you’re using two doorbells (FRONT and REAR[1]). What’s the rear doorbell button, and is it functioning as expected?
If everything is working as expected with both doorbell buttons actuating your chime now, then I imagine the chime itself is wired correctly, but that’s something else you could test with your multimeter’s resistance or continuity function. I mention this because I once developed a problem with my Video Doorbell v2 actuating the mechanical chime, and in my troubleshooting I discovered that the chime had been installed (long before I moved into this house, when it was still using a “dumb” doorbell button) with the transformer wire connected to the chime’s FRONT terminal and the doorbell button wire connected to the chime’s TRANS terminal. When I determined this through testing and corrected the wiring positions, that resolved my problem.
Incidentally, I’ve also been told by Wyze Support that this sound from the chime box is normal if Chime Controller is installed using the alternate wiring method, so I’m mentioning that with a link in case you need it in the future, but I think a better course will probably be ensuring that the current chime box wiring is correct and then installing Chime Controller in the normal fashion.
Again, I’m making an assumption here that your mechanical chime has FRONT, TRANS, and REAR terminals, so feel free to correct me if I’m wrong. ↩︎
The humming from the chime box stopped when I added the jumper but then I also changed the transformer and removed the jumper and the humming from the chime box also stopped. Not to confuse you but there is also humming coming from the Wyze Duo itself which I suspect might be due to my hardwire wires potentially, I am going to try to get a more solid connection with the wires and the device and see if that remediates the issue there.
The multimeter reading was done before I replaced the transformer so the reading was from the 16V 10 VA transformer.
After replacing the transformer and removing the jump cable from the mechanical chime box everything seems to be working correctly. I did receive the chime controller today from Wyze which I was going to return but based on the feedback I have gotten its best to install it regardless.
Since everything is working correctly right now. If I install the Wyze chime controller how will I know its installed/working correctly since everything seems fine currently?
Okay, so you actually have had two different parts of the system humming. Thank you for clarifying that.
I’m not sure what you mean about “[trying] to get a more solid connection with the wires and the device”, but it doesn’t hurt to check/confirm your connections.
I’m not surprised that the older transformer was showing you >19 V, as my transformer with the same rating has consistently measured in excess of 18 V whenever I’ve checked its voltage.
I would still install the Chime Controller now that you have it, and I would follow the standard instructions for installing with Video Doorbell v2, which I linked in a prior post. I think doing that will save you some potential trouble later (i.e., unwanted sounds from your chime box) and is what Wyze recommends for using these doorbells to actuate a home’s built-in mechanical chime. Like I said, if you check related posts here in the Forum from other Duo Cam Doorbell users who have wired their devices to their homes’ chimes without Chime Controller, then you’ll see a lot of reports that their doorbells were making unwanted noises and even full ding-dong rings when no one was pressing the button. This happened a lot more last year, after Wyze released Duo Cam Doorbell but before they made Chime Controller available for purchase in Wyze Shop (which they did on the Web site earlier this year).
If you follow the instructions for the standard wiring method in the Chime Controller installation guide, then the doorbell should continue to function as expected, and you may not notice an immediate difference if everything is currently working correctly without Chime Controller, but having that installed might help with at least a couple of other things:
I hope this helps! I really appreciate your taking the time to follow up and answer my questions!
Also, if your Duo Cam Doorbell unit itself continues to make noise even after you check out your wiring, then I’d definitely open a ticket with Support about that.
Alright I will check out the install instructions for the chime controller and install it sometime this week.
The other issue I am experiencing is very strange…I’m not sure if it’s expected behaviour or maybe my wyze duo doorbell unit has issues. When I put my ear close to the Wyze duo doorbell unit while it’s installed using my home ac and mounted I hear a buzzing/humming from the doorbell. The strange thing is if I open the Wyze app and load the live view of the doorbell duo the buzzing/humming goes away, when I close the app it starts buzzing/humming again.
Any idea or anyone else have this experience with their unit?
That was my understanding from your initial post, and I’m not sure why it’s doing that. That’s why I’ve mentioned contacting Wyze Support more than once in this topic. I don’t know why it would be making that sound or why that sound would stop when live view is active, and I haven’t seen other users report this, but now I’m curious if anyone else has had that experience, because it does seem strange to me.
Yeah very odd. I have reached out to Wyze Support and will update my thread when I hear more.
I received the wyze chime controller which I installed but the humming/buzzing from the Duo Doorbell remains which is unfortunate. I have reached back out to Wyze support but I am not sure what else to try other than maybe returning the unit and trying with another.
While creating new connection points with my doorbell wiring I noticed that my doorbell wire is actually the 24AWG/4 cable but it can be common when having two doors bells connected. I wonder if this could also be a reason for the hummin/buzzing?
Here is a photo of the chime controller installed in my mechanic chime box:
Here is a photo of the doorbell wiring 24AWG/4 cable (I only use the red and black):
Assuming that the WAGO connection is good and that the orange wire nut connecting the “common” black wires (I would expect to see 3 of these meeting at that nut) in your chime box is also making a good connection, then your first photo shows what I would expect to see in a 2-doorbell setup for a single mechanical chime. I think that photo is helpful.
I still don’t know what would cause the Duo Cam Doorbell itself to buzz or hum, though, and I wonder what Wyze Support has to say about that.
Also, because your setup is using a Wyze smart doorbell for the front and a (presumably) “dumb” doorbell button for the rear, another recent topic comes to mind. Since I haven’t seen a clear answer in that case, I wonder if that second doorbell button is part of the problem for you. What happens if you temporarily disconnect that by removing the red wire from the chime’s REAR terminal and test your Duo Cam Doorbell? Does it still make the unwanted noise?
Disconnecting the second “dumb” doorbell is a good idea and I will try that at some point and report back.
Wyze is sending me a replacement unit in the mail so try out. I am going to try that new unit first with the dumb doorbell still plugged in to see if that fixes the humming/buzzing.
They did the same for me when my Video Doorbell v2 stopped actuating my mechanical chime, and this was after doing their suggested troubleshooting (including trying the alternate wiring method). That’s when I decided to think through the problem some more and do my own troubleshooting and how I discovered that the mechanical chime had been wired incorrectly long before I started. For me, that was the real remedy, and I never had to use the replacement doorbell Wyze sent me. (I set it up to make sure it works and then put it back in its box to set aside as a spare.) That’s why I frequently recommend that people do their own testing and assure themselves that their chimes are wired correctly prior to installing one of these video doorbells. If you know that everything is as it should be at baseline, then you’ve already eliminated that as a possible problem if you have issues after installing the video doorbell.
