Max value that can be set in a Characteristic

[nicolosponziello]

Hi, in my project I have the necessity to read a long value from a characteristic provided by the ESP32. When I set the value I get the following error: NimBLECharacteristic: "Size 3877 too large, must be no bigger than 512".
Is there a way to increase this limit? What can be the maximum value of bytes?

Thank you

[h2zero]

From the Bluetooth core specification:

The maximum length of an attribute value shall be 512 octets.

So you will need to chunk your data into multiple writes and read the values written into a larger buffer.