GS-BT2416C2_0709 STMICROELECTRONICS [STMicroelectronics], GS-BT2416C2_0709 Datasheet - Page 15

• Manufacturer Part Number: GS-BT2416C2_0709
• Description: Bluetooth class 2 module with embedded SPP SW
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

GS-BT2416C2.AT1
Appendix A
A.1
8.1
A.2
SPP Embedded Bluetooth™ firmware for STLC2416 based modules version 1.2.1.8
Introduction
AT command interpreter OBSTFW-101 has been developed by Sycom on its proprietary
Bluetooth stack
Following data are disclosed with Sycom permission and agreement. All these information
are subject to usual ST reproduction and disclosure rules stated on the last page of the
present document.
Description
Sycom firmware OBSTFW-101, from now on named .AT1, implements all Bluetooth core
protocols and Serial Port Profile (SPP) to replicate UART data traffic over a Bluetooth link.
The module can be fully controlled using AT commands. The throughput over-the-air is up to
~290 Kbps.
Modes of operation
The module has two modes of operation:
●
●
To notice that there is not a default MODE, regardless connection status: this mean that the
active MODE is always established by GPIO3 status.
The external MCU can switch the mode of operation of the module using GPIO3. Both when
the module is turned on or it is switched from DATA MODE to COMMAND MODE a +READY
event is generated. This event informs the external MCU that the module is ready to accept
AT commands. Before the +READY event is generated, no AT commands can be issued to
the module.
COMMAND MODE: this mode allows the module to accept AT commands from the
UART. AT commands are used to control any property of the module (Bluetooth name,
visibility, etc.) as well as to trigger any operation (connection set-up, tear-down,
discovery, etc.)
DATA MODE: this mode allows the module to send and receive raw data over a
Bluetooth SPP link. When in DATA MODE each byte transmitted over the UART is
replicated onto the existing Bluetooth SPP link, and each byte received from the remote
Bluetooth device is replicated onto the UART port. DATA MODE should be activated
only if a Bluetooth link has already been setup using AT commands in COMMAND
MODE.
AT command
AT command
15/32