I'm currently making a simple smart lock for a door (it can be controlled and monitored using an Android phone) using Wemos D1 Mini connected with few sensors. So because it transmits data using WiFi and i'm using a case made from metal, I worried about the reliability of the signal connection (in some time it will be weakened enough that the WiFi disconnected).

So my question is what is the type of material usually used for smart locks' casing ? Do you also have any recommendation of material for this purpose ?

  • \$\begingroup\$ If you have a look at IoT devices they are usually plastic. Probably more to do with that being cheap and easy than anything else. \$\endgroup\$ – Puffafish Aug 1 at 15:13
  • \$\begingroup\$ As someone who does IoT engineering, I am curious how you define, an "IoT device". It's more of an architecture than a simple device... The one thing that's really interesting about IoT is creativity. But I think to answer your question, I think it depends how you lay everything out. For instance, we have antennas that are on the outside of our chassis for WiFi. The type of chassis or casing you need is dependent on your thermal and mechanical specifications. \$\endgroup\$ – KingDuken Aug 1 at 15:22
  • \$\begingroup\$ Sorry, I should've been more clear. In my case there is no external antenna, just the built-in ones \$\endgroup\$ – Sageri Aug 1 at 15:24
  • \$\begingroup\$ The question has been reworded, thanks for making me realize the vagueness :) \$\endgroup\$ – Sageri Aug 1 at 15:32
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    \$\begingroup\$ Make it from metal for sturdiness, and put a hole/slot in it that is close to a 1/4 wavelength of your wifi frequency. You could also put a plastic covering over the metal to style the look. \$\endgroup\$ – Aaron Aug 1 at 15:44

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