I was since long looking for a solution to build my own smart parcel box… And finally found Iparcelbox in the UK that have a diy solution. Not sure if it’s possible to connect to it with homey, but would be a cool integration.
Maybe you want to share a link to this diy solution?
For those who may be interested, iParcelBox has a full local API so that you can integrate with smart home systems. There’s already a Home Assistant integration, but it would be a fairly straightforward job to add others.
For details, email email@example.com.