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Athom Homekit and MQTT WiFi Smart Relay Switch, DIY Module for Smart Home Automation, Works with Apple Homekit Siri Voice Control 10A : Amazon.de: DIY & Tools
After adding the mqtt switch and sensor to configuration.yaml, a warning message is displayed. · Issue #72585 · home-assistant/core · GitHub
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ITEAD Sonoff switches and sockets - cheap ESP8266 Wifi+MQTT hardware - Tutorials & Examples - openHAB Community
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MQ-7260AM - MQTT I/O Module with 2-port Ethernet Switch, with 6-channel Digital Input and 6-channel Power Relay
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