You're focusing on an app, instead of ringing person's UX and _the_ doorbell itself. My suggestion: find a niche, like a doorbell for hearing impaired home own

You're focusing on an app, instead of ringing person's UX and _the_ doorbell itself. My suggestion: find a niche, like a doorbell for hearing impaired home owners. Otherwise you'll be recreating Nest. Google won't buy identical product twice, to kill it. A generic Nest-like product has little chances to take over the market. A button feels more natural and is much more approachable over an QR code. QR may be a nice fail-over for when no one is opening the door in reaction to knocking or pushing a button. But QR as the main method? Maybe for evolving markets or harsh neighborhoods where wireless doorbells get stolen - if that's even a thing. You're looking into providing value to home-owners, by making it easier for someone outside their homes. In most cases this dumb button that makes some sound inside the house just works. Little area for improvement here, for most people. Your potential market for people willing to stick a QR code on their door are: > "I'm hearing-impaired. Please use below QR code if I don't hear you knock" > "I'm not opening? chat with me here [QR code]" ↑ this is your potential target. You already see that most comments in this thread tell you that people don't want QR codes on their doors. You have an idea for a solution still looking for a problem. Accessibility around hearing loss may be one. You can help people. And from a business perspective, you may be able to get government grants for such project, which may be better for you than crowd-sourcing. And, you may get customers who get their purchases partially covered by gov health programs, if you properly interact with related accessibility-related gov bodies (YMMV around the world of course), apply for getting your stuff assessed for free advertisements inside hearing loss-related clinics etc. And again - you can make a product that makes impaired folks' lives better. Win-win. There are multiple ESP32-based doorbell projects (I like this one[0]) that can be expanded easily with code changes. I can't really see how a QR code is better. Make your product either equally interesting to public or covering some niche use-case. And again: Nest... [0] https://tristam.ie/2023/758/ https://tristam.ie/2023/758/