Not sure exactly what you mean, but printf is the way to have precise control over your output. A double = long long = int64_t in esp32.

double x = 9876543210;
Serial.printf("Output my double value: %ll\n", x);


thank you for your responce.

what if x is an array?

is there a way to pass x as ...

Hi,

How can I pass array of doubles through the wifi?

I've been playing with client.write() and successfully passed strings, characters, integer numbers but when it comes to double numbers, i can't get it to work. I have some sensors data that uses decimal number and need help passing double ...