Have a look at the sonoff relays.
It is a relay controlled by WIFI.
You can reprogram them to be controlled by MQTT - then they will report their state to HASS (ie they are a true 2-way communication device). See https://community.home-assistant.io/t/sonoff-homeassistant-alternative-firmware-for-sonoff-switches-for-use-with-mqtt-ha/2332
Only around $10 each!