Sending data to another ESP

I have made an esp library and im using the generated code for my project and all of this works perfectly fine. Thanks for this but now i want to share this data to another esp. I have changed the code a little but im not getting the expected output. Im using espSerial.println() function to send the data and the data received on the other esp is supposed to be a string but instead all i get is a question mark. Can you help me out to resolve this error?

Hello, @Hitarth04 !
The problem you are describing is not related to Edge Impulse code base, therefore we cannot provide help with it.
However you might have better luck as Espressif forums, as it is a questions about ESP serial communication.