Sorry, I don’t really have the time to re-write the entire project to fit the hardware you have. If you’d like to recreate this project for yourself, it would be far easier to use the same hardware that I used and then modify the software to include the DHT11. I started this project using the DHT22, so I do have some code available if needed.
I’m not familiar with the ESP8266 sp01, but it may be compatible with my sketch “as is”, since you’d only need 3 I/O pins to make it all work. 1 I/O pin for the DHT11 and the SDA and SCL pins for I2C communication with the MCP23017 port expander & the PCA8685 LED driver IC.