How about modifying Tasmota to send arbitrary MQTT messages understandable by Domoticz? I used Domoticz in the past but at some point moved to Home Assistant. Here is an example of how to integrate into Tasmota: https://github.com/phpcoder/tasmota-custom-integration , and more on MQTT: https ...

Hi,
couple of years ago I modified my doorbell starting with the information from this thread. I can see this thread is still active. For those interested I published a Github repository at https://github.com/phpcoder/doorbell-customize with a description of my mod. Hope it helps.
Cheers.
SP