“The UPS did not shut down the computer in the event of a power outage. This hack makes the UPS smarter, I made this circuit with ESP8266
I have a well-functioning UPS with a faulty network interface, I use it for the iobroker server. The problem was that it did not shut down the PC in the event of a prolonged power outage. To smarter the UPS, I made the following circuit using ESP8266 and PCF8591 and built it into the UPS.”