This technique uses the following Hardware: Sonoff RF Bridge ($14) RaspberryPi Zero W ($10) + SD Card 433MHz open/close magnetic sensor ($6) 433MHz PIR sensor ($5) Micro USB cables (to power Sonoff + Raspberry Pi) USB to Serial adaptor (to flash Tasmota software onto the Sonoff) And the following free and/or open source Software: Tasmota […]