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Product:
SimpleLink Lowpower SDK F3 BLE5 Stack
Internal ID:
BLE_LOKI-694
Found In Release:

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BLE Stack BLE5-3.2.1 RC13
BLE Stack BLE5-3.2.4

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BLE Stack BLE5-3.2.1 RC13 BLE Stack BLE5-3.2.4
Fix In Release:

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BLE Stack BLE5-3.2.4 RC2
BLE Stack BLE5-3.2.4

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BLE Stack BLE5-3.2.4 RC2 BLE Stack BLE5-3.2.4
Affected Platform/Device:
CC23xx
Workaround:

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1. GATT_WriteLongCharValue redefined as an extended command in the Tester_HCILib xml files, i.e "Custom Command" in order to support data size >= 248 bytes.
2. ATT_HandleValueNoti event defined also for HCI_Vendor_Specific_Event_Ext, which is the same as HCI_Vendor_Specific_Event, but supports events that has a length bigger then 256 bytes.

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1. GATT_WriteLongCharValue redefined as an extended command in the Tester_HCILib xml files, i.e "Custom Command" in order to support data size >= 248 bytes. 2. ATT_HandleValueNoti event defined also for HCI_Vendor_Specific_Event_Ext, which is the same as HCI_Vendor_Specific_Event, but supports events that has a length bigger then 256 bytes.

Performing GATT_WriteLongCharValue with data of size 300 bytes, results in writing only 44 bytes.

Test was executed on CC2340R5.

Test Sequence

Flash 2 CC2340R5 devices: one with Host Test, second with Data Stream app, configured with:
Public Address,
ble.maxPDUSize = 255,
DSS_MAX_DATA_IN_LEN = 1024 (defined in data_stream_server.h)
Create connection between 2 sides
Exchange MTU with 251 bytes
Perform GATT_WriteLongCharValue with the Host Test

Sniffer log shows that only 44 bytes were actually written:

RTOS: FREERTOS

Compiler: both IAR and TICLANG

Reproducibility: 100%