Best structure to use for sending multiple variables between a phone and ESP32 via Bluetooth

[cattledog]

@UNarmed

My initial thought was to combine all the variables into a string, send this string to the receiving device, and then have the receiver parse the data to assign them to individual variables. Would this be the best approach for what I'm trying to achieve or would you guys suggest something else?

Sending the character data may be easier to develop and debug than sending the data in a struct. You may lose some efficiency, but how much data are you sending/exchanging and how fast do you need to do this?

I would recommend a review of Robin2's excellent tutorial on how to send the Serial data as a character string with start and stop markers.

What are you running on the Android side. Is it a custom app? Did you use app inventor? Do you know how to handle a struct on the Android side if you chose to go that route?