How to close physical contact via the web?

Question

Electronics

Actually a subject. How to implement? Need a minimum cost, arduino disappear.
How to implement I represent only approximately. Are there any options on how to do this on a PIC?
Perhaps there are ready-made cheap solutions?
UPDATE:
With remote access. Those. the button is stupidly plugged into the lan (maybe POE can even be implemented), and it needs to be controlled to close / open from the web.

Answer 1

Cheap microcontroller + loose powder + V-USB .
Example:
codeandlife.com/2012/02/22/v-usb-with-attiny45-att...
or
openrobo.ru/control/usb
In your version, you can also add a key on a transistor and a relay.
If there is an LPT port on board the server, then you can generally get by with one key on a transistor + relay.
Example:
https://geektimes.ru/post/256690/

Answer 2

take a solid controller, run on it, for example, freertos, such a thing . I do not advise you to fasten the
POE relay if you need a minimum cost.