you need: esp32/esp8266 (at moment ESP32 S2 is used!), a relay module (2 relay module at moment), a (110/220V) micro powersupply, a case and 2 push buttons (3 push button at moment) you need connect ...
The relay repeater module accepts single contact closure inputs from logic solver trip outputs including the company's STA Safety Trip Alarm and the SPA2 Programmable Limit Alarm Trip. With three ...
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