This message will disappear after all relevant tasks have been resolved.
Semantic MediaWiki
There are 1 incomplete or pending task to finish installation of Semantic MediaWiki. An administrator or user with sufficient rights can complete it. This should be done before adding new data to avoid inconsistencies.1. STM32WB - Fast Firmware Update Over The Air
This is a description how to improve the data throughput while updating the STM32WB Application or Wireless Stack thanks to wireless STM32WB BLE protocol. The current implementation of "BLE_ota" application is described with the following Application Note:
1.1. Limitation with current implementation
- The OTA RAW Data Characteristic is limited to 20 bytes
- So ATT Packet data transmitted is limited.
The following figure is an air capture of the raw data characteristic sent by the ST BLE Sensor application
ATT Write - 20 bytes |
---|
1.2. How to increase the data throughput
- by increasing the size of the OTA RAW data characteristic to 248 - done with CubeWB 1.12.0 release
#define OTAS_STM_RAW_DATA_SIZE (248) //otas_stm.h
#define OTA_RAW_DATA_CHAR_SIZE OTAS_STM_RAW_DATA_SIZE //otas_stm.c
/**
* Add Raw Data Characteristic
*/
aci_gatt_add_char(OTAS_Context.OTAS_SvcHdle,
OTA_UUID_LENGTH,
(Char_UUID_t *)OTA_RAW_DATA_CHAR_UUID,
OTA_RAW_DATA_CHAR_SIZE,
CHAR_PROP_WRITE_WITHOUT_RESP,
ATTR_PERMISSION_NONE,
GATT_NOTIFY_ATTRIBUTE_WRITE | GATT_NOTIFY_WRITE_REQ_AND_WAIT_FOR_APPL_RESP,
10,
1,
&(OTAS_Context.OTAS_Raw_Data_CharHdle));
- by increasing the size of ATT Maximum Transmission Unit (MTU) which is the maximum length of an ATT packet
/**
* Maximum supported ATT_MTU size
* This parameter is ignored by the CPU2 when CFG_BLE_OPTIONS is set to 1"
*/
#define CFG_BLE_MAX_ATT_MTU (251)
- by managing with GATT Client remote application the negotiation of the ATT MTU to increase the data payload for the transmitted packets
ATT MTU Exchange |
---|
1.3. ANDROID - ST BLE Sensor v4.12.0 - How to
The version v4.12.0 is available on Google Play https://play.google.com/store/apps/details?id=com.st.bluems&hl=en&gl=US