It provides local control, MQTT and integration with home automation systems such as openHAB, Home Assistant and Domoticz.
You may find more information on the official GitHub page
If you are starting out and wish to have a relatively easy experience in developing your projects, then try the build-in web interface.
Example of Tasmota Web Interface
the Sonoff 4 Channel Pro MQTT Switch
On delivery it is already in factory reset state.
If you want to factory reset afterwords, check this link Tasmota Button Usage
When held continuously for 40 seconds (Configurable with SetOption32, value is 10x the configured hold time) Tasmota will reset to firmware defaults and restart.
For the temperature/humidity monitor, you also need to specify the sensor type, e.g. AM2301.
You use the Tasmota WEB UI for configuration. Enable MQTT in "Configuration/Other" and then specify your setup in "Configuration/MQTT".
For more details see also https://github.com/arendst/Sonoff-Tasmota/wiki/MQTT
There is a description of the integration with Home Assistant on the Tasmota site.
DrZzz has made some tutorials, which may be helpful (but skip the parts about flashing Tasmota).
General setup for tasmota is described at https://www.youtube.com/watch?v=c2IUIUnxjUY&t=859s
For the RF Bridge there are some more specific instructions at https://www.youtube.com/watch?v=Ega4U1KRlso
The device is given an address by a DHCP server or the WIFI router.
If you know the subnet address you can use the Tasmota Device Locater to search for the device. Else check with the router.
The Smart Bulb is compatible with the "AiLight" 27 module.
The installation is done as for any other Tasmota device. However you need to be extremely careful when setting up the Wifi network, since there are no button to do a factory reset. Wrong SSID or password and the bulb is bricked!
For installation follow the standard procedure.