Can't stream big files over 500 bytes

[antonbrams]

Hi, i'm trying to send ~2000 bytes blobs from noble to Adafruit Itsy Bitsy NRF52840 Arduino over the BLE uart. First on the arduino side i've set the buffer to 30 bytes and send a 400 bytes string. The overflow callback of uart said that there is too much data. Then i've set arduinos buffer to 2000 bytes and send 600 bytes from noble. The arduinos callback was silent. I'm thinking that noble can't send chunks over 500 bytes. Is it correct, or am i doing something wrong?