I ordered a RGB+CCT controller online and to my surprise the device came with a new Tuya WiFi module instead of an ESP module.
Now I am trying to swap the WR3 Tuya WiFi module with an ESP-12f module.
In the following steps I will display my findings.
I desoldered the WR3 module to check the connections with my meter and also used a lamp to expose the traces.
I checked the conenctions and it seems that only RX, TX , VCC, GND and EN are connected.
I found this thread, but still do not know how to connect it properly.
I will figure out the software side.
The ESP is used with Tasmota installed and communicates with the IC over serial.