I'm using Home Assistant running in a Proxmox Virtual Machine. Whenever possible, I use WiFi to communicate with remote devices.

Integrations include:

• Kodi (Media Center)
• Konnected Alarm Panel Pro (12-Zone)
• MQTT
• Obihai (Home Telephone)
• Shark IQ (Vacuum cleaner)
• Tasmota (Lights, ESP32 devices, Temperature sensors)
• UniFi Network (Network & WiFi access points)
• UniFi Protect (Video cameras)
• QuinLED-Dig-Quad with WLED firmware
• Gledopto WLED Digital Light Strip Controller
• SMLight SLZB-06M Ethernet/WiFi PoE Zigbee Adapter
• RATGDO Garage Door Opener
• Rheem EcoNet Thermostat
• Plex Media Server
• Weatherflow Tempest

The following hardware has been flashed with Tasmota & connected to Home Assistant using MQTT:

• Kauf A15, A19 & A21 Bulbs
• Seeed Studio XIAO ESP32C3 Development Board - Don't use these (no longer supported)
• Seeed Studio XIAO ESP32S3 Development Board
• Sonoff Pow R2 Power Monitoring Switch Module
• Sonoff S31 - Used to monitor power consumption & control outlets
• Sonoff Slampher R2 - Table lamp
• Sonoff THR320D - Monitors attic temperature/humidity and controls an exhaust fan (Sensor SI7021 requires “DhtDelay 500,40”)
• Sonoff TX T0US3C - Wall switch used to control 3 devices
• Sonoff NSPanel Touch Display Switch - Wall switch and display
• Unexpected Maker TinyS3 ESP32-S3 Development Board

Sensors

• Analog Devices DS18B20
• DHT22 - Do not use the Raspberry Pi Adafruit library
• Bosch BME280
• Bosch BMP280
• SONOFF SNZB-02 ZigBee Indoor Temperature and Humidity Sensor
• Aqara Zigbee Temperature and Humidity Sensor

Network Infrastructure:

• LilyGo ESP32-S3 LoRa Development Board with SX1262 868/915MHz GPS U-blox L76K - aka: T-BeamSUPREME (M)
• RAK WisBlock - aka: with u-blox ZOE-M8Q, OLED Display & solar enclosure

Sample Tasmota device:

GPIO1    Switch1   Fire alarm contact closure input
GPIO2    Relay1    Contact closure output
GPIO7    AM2301    HVAC Supply Temperature/Humidity
GPIO43   Buzzer    Buzzer
GPIO44   AM2301    Free Air Temperature/Humidity

Devices can be configured by browsing to their IP address & going to Tools/Console.

Tasmota settings:
Setoption8 On (Output temperature in °F)
Teleperiod 60 (Report to MQTT server every 60 seconds)
SwitchMode1 2 (when the GPIO pin is pulled low during a contact closure it reports "ON")

Rule1    Relay state follows the contact closure state
ON Switch1#State DO Power1 %value% ENDON

Rule2    Sound the buzzer then a contact closure is detected 
ON Switch1#State=1 DO Buzzer 1,5,1 ENDON

Rule3    Control a spot cooler based upon two temperature sensors
ON Switch1#State=1 DO WebSend [192.168.10.170] Power1 0 BREAK
ON Tele-AM2301-07#Temperature>80 do WebSend [192.168.10.170] Power1 1 BREAK 
ON Tele-AM2301-44#Temperature<80 do WebSend [192.168.10.170] Power1 0 ENDON

• BME280
• DHT22
• DS18B20
• Buzzer