https://www.wemos.cc/en/latest/d1/d1_mini.html
Backlog SwitchMode1 3; SwitchTopic 0 Backlog Rule1 on Switch1#state do Publish stat/custom-topic/SWITCH1 %value% endon; Rule1 1
SetOption114 ON SetOption32 1
Settings:
SwitchTopic 1 - Set MQTT switch topic to Topic
SwitchMode 5 - Set push-button with long press mode
SetOption32 2 - Set key hold time to 2 seconds
Template: {"NAME":"Generic","GPIO":[1,1,1,1,1,1,1,1,1,1,1,1,1,1],"FLAG":0,"BASE":18}
Episode 1 - Learning Tasmota, Part 1 by Mark Troyer