openHAB and Tasmotized ESP8266

[hafniumzinc (T)]

You mention that you just have a ESP8266 switch. Maybe try this tutorial?

[OH3] Tasmota relay via MQTT (Sonoff Basic with optional DHT22)

Foreword This tutorial is for openHAB3. If you are on openHAB2 you will need to use my older tutorial. This tutorial was written with openHAB3 running on a headless Raspberry Pi 3B with Raspberry Pi OS, with SSH access. Overview This tutorial assumes you have openHAB3 installed. This tutorial will show you how to: Install an MQTT broker, install the MQTT binding, and connect the two Setup device to read the DHT22 temperature sensor Setup device to connect to the MQTT broker Configure openHA…