I wouldn't call it "productize", but when I wanted to give an ESP32 project to a friend who would be using it, I did these things: designed and printed a case f

I wouldn't call it "productize", but when I wanted to give an ESP32 project to a friend who would be using it, I did these things: designed and printed a case for the ESP32. The ESP32 is soldered into a perma-proto and all wire connections are soldered to the ESP32's terminals (I don't use a solderless breadboard, or Dupont wires, once I'm done with the design). The perma-proto is screwed into posts in the case (as are several daughterboards). The user-controlled potentiometer is also soldered into the perma-proto and is tightly screwed into the case. There's a power jack screwed into the case, and all wiring in/out of the case goes through a "cable gland" and the cables, outside the case, and wrapped into nylon sleeve with strain relief. And an on/off switch. example: https://www.printables.com/model/72839-stable-and-waterproof-electronic-box-enclosure https://www.printables.com/model/72839-stable-and-waterproof.... If I am using screw terminals, wires are terminated with ferrules. For some projects that use 120V AC directly, I've purchased nice receptacle with fuse, and grounded the metal casing. But I don't feel comfortable distributing those. I have also been known to encase an entire project in clear epoxy (the first "maker" project I did, thanks to an enlightened shop teacher in the 1980s, was a nightlight using only 3 components, encased in epoxy; they work some 35 years later!) Some things I can think of to go further: designing my own PCB instead of using perma-proto. FInding better temporary connectors (duponts are not reliable). Eliminating the ESP32, replacing it with simpler logic circuits when possible.