Please help me with communication problems between esp32 and arduino nano. I followed the same instructions as this video https://www.youtube.com/watch?v=vMFqgNO0_5Y But the data is not transmitted. But when I set baudrate ESP32 = 115200, NANO = 9600 then esp32 seems to receive the sent signal, but ...

Please help me send data esp32 up firebase!!
I have used the library at this source https://github.com/firebase/firebase-arduino/issues/220
but not successful.