2.4.3.3 OTA Data

The OTA Data characteristic allow client to send specified data to Server. Client shall enable the Client Characteristic Configuration Descriptor (CCCD) of OTA Data on Server before sending the specified data.

Requirements for this characteristic are defined in Table 3.1.

The structure of the OTA Data characteristic is defined in Table 3.4.

Table 3.4: Structure of OTA Data characteristic
Field	Requirement	Size (octets)	Description
Fragmented_Image	C.1	1 to ATT_MTU-3	The fragmented image.

C.1 It’s available only after client issue a Firmware Update Start procedure.