“Create a smart door lock that utilises BLE for local unlocking and a mobile app integrated with Blues Notecards for remote unlocking.
Building a smart door lock has been on my to-do list for the longest time. Many DIY smart door locks I’ve come across rely on a mobile app, which, in my opinion, tends to negate the time-saving benefits as it still involves connecting to the smart lock before unlocking the door—almost akin to fetching a physical key. Then, a lightbulb moment struck when I recalled a YouTube video where an individual synchronised his room lights to activate upon the presence of his smartwatch. This sparked the idea that I could implement a similar concept for a smart door lock.
Instead of dismissing the notion of a mobile app entirely, I integrated it into the project to facilitate remote door unlocking from anywhere in the world via the internet, utilising the Blues Notecards. One remarkable feature of Blues Notecards is that you can easily switch from a cellular Notecard to a Wi-Fi Notecard without changing a single line of code.
If this is your first time using Blues Notecard, check out the Notecard Quick Start article here.
How it works
The Smart door lock offers two unlocking options: Bluetooth and internet connectivity through a cellular network. To unlock via Bluetooth, your device (phone, smartwatch, etc.) just needs to be near the door, and the door will open. This method is ideal for convenient nearby access. However, Bluetooth range limitations restrict its use to proximity. For remote access, the Blues Notecard provides internet connectivity through a cellular or Wi-Fi, depending on the Notecard you are using. This allows you to control the lock anywhere in the world, making it convenient for granting guests access when you’re away from home.”