Hello, I'm developing an installation meant to be in a high humidity environment (91%) and I want some advices of how to protect the electronic equipment on it.
It is meant to run during one year.

Teensies will be attached on a PCB with ethernet controller, I'm wondering if electronics varnish over the PCB and the teensy will be enough to protect, or if I need some better protection.
I've tested wrapping the entire board using thermo retractable (photo attached)

Other pieces of the system
Raspberry PI - thought of coating with varnish or dig into mineral oil
ethernet switch - thinking of using kitchen film to wrap it with the cables plugged
usb webcam Logitech C270 - using without protection at all.
AC connections - without protection.

Other ideas? maybe using food vacuum selaer machine?
Thank you!

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