• MQTT
• Configuration
• Topic format
• Root topic
• Commands and states
• Placeholders
• JSON payload
• Messages
• Heartbeat
• Actions
• Relays
• Lights
• Common
• Color
• openHAB
• Sensors
• Buttons
• LEDs
• Sonoff RF Bridge
• IR
• UART-MQTT module
• Features based on MQTT
• Relay & color synchronization across devices
• Home Assistant auto-discovery
• Domoticz
• Implementation
• AsyncMqttClient vs PubSubClient
• MQTT module API
• Payload size
• Secure connection