We used the Wi-Fi Desktop Thermostat as our ESP8266 platform.
The YAML file to configure ESPHome for use with the desktop thermostat can be downloaded below. You must, of course, replace the dummy SSID and passphrase by the values needed for your own network.
Note that to uncomment the sensor section, remove the dashes ('#') in front of the lines. If you do, you must also replace the 1-wire address of the sensor by the one of your sensor, otherwise it will not work.