Plastic box for STEVAL-BCN002V1B sensortile

[NSulj]

Is there any plastic box for  STEVAL-BCN002V1B board. And what is maximum data size which we can sent via bluenrg-2 when BLE characteristic is configured as notify?

Thank you in advance,

Nikola

[Winfred LU]

No idea about the plastic box.

BlueNRG-2 supports BLE data length extension, which may have data payload up to 251 byte in one packet.

Decreasing 4-byte L2CAP header and 3-byte ATT Opcode, the maximum length of ATT data can be 244 bytes.

The maximum allowed ATT MTU is 65535, and the maximum characteristics size is 512.

To transmit a characteristics value of length longer than 244, the value has to be fragmented in multiple packets.

However, since notification is a single-packet event, 244 will be its limit.