KC868-1U is a esp32 diy pcb board use for esp32 diy project. it can install to 1U size box, let your relay controller become smart. if you have a power sequencer, KC868-1U will easy connect it, so that smart control your rack power strip. You can DIY one smart power sequencer. It will support arduino IDE, home assistant by ESPHome, also support Tasmota open source home automation platform.