FSC-BT6038A programming user guide

Introduction

Release note

Index	Version	Date	Description
1	V1.0.0	2024/05/23	First edition
2	V1.0.1	2024/07/09	Add le audio description Add GATT description Fix known issues
3	V1.0.2	2025/01/07	Fix known issues Add some command and event descriptions

Description

This design guide is suitable for engineers to develop FSC-BT6038A series bluetooth modules

Module default settings

BR/EDR Name	FSC-BT6038A
BLE Name	FSC-BT6038A-LE
UART configuration	115200/8/N/1

Hardware description

Pin diagram

FSC-BT6038A as an example:

Pin description

Pin	Name	Type	Descriptions
1	SYS_CTRL	I	Typically connected to an ON/OFF push button Also usable as a digital input in normal operation
2	MIC_LP	A	Microphone differential 1 input, positive Differential audio line input 1, positive
3	MIC_LN	A	Microphone differential 1 input, negative Differential audio line input 1, negative
4	MIC_RN	A	Microphone differential 2 input, negative Differential audio line input 2, negative
5	MIC_RP	A	Microphone differential 2 input, positive Differential audio line input 2, positive
6	MIC_BIAS	A	Mic bias output
7	NC	N	Not connect
8	NC	N	Not connect
9	VDD_IO	P	I/O port supply
10	PIN34 I2C_SDA	I/O	Programmable I/O Alternative funciton I2C_SDA
11	PIN35 I2S_SCL	I/O	Programmable I/O Alternative funciton I2C_SCL
12	NC	N	Not connect
13	NC	N	Not connect
14	PIO18 I2S_DOUT	I/O	Programmable I/O Alternative funciton I2S_DOUT
15	PIO16 I2S_BCLK	I/O	Programmable I/O Alternative funciton I2S_BCLK
16	PIO19 I2S_DIN	I/O	Programmable I/O Alternative funciton I2S_DIN
17	PIO17 I2S_WS	I/O	Programmable I/O Alternative funciton I2S_WS
18	PIO15 I2S_MCLK	I/O	Programmable I/O Alternative funciton I2S_MCLK
19	VDD	P	Power supply
20	GND	P	Power ground
21	AIO0	I/O	General-purpose analog/digital input or OD LED output
22	AIO1	I/O	General-purpose analog/digital input or OD LED output
23	RESET	I	External reset input
24	VBUS	P	USB power
25	GND	P	Power ground
26	USB_DP	I/O	USB data positive
27	USB_DN	I/O	USB data negative
28	PIN7 TRBI_MISO	I/O	Programmable I/O TRBI_MISO
29	PIN6 TRBI_MOSI	I/O	Programmable I/O TRBI_MOSI
30	PIN8 TRBI_CLK	I/O	Programmable I/O TRBI_CLK
31	PIO5 UART_TX	I/O	Programmable I/O Alternative funciton UART_TX
32	PIO4 UART_RX	I/O	Programmable I/O Alternative funciton UART_RX
33	PIO3 UART_CTS SPDIF_IN	I/O	Programmable I/O Alternative funciton UART_CTS SPDIF_IN
34	GND	P	Power ground
35	EXT_ANT	A	Antenna
36	GND	P	Power ground

Hardware design notes

The simple test of the module only needs to connect VDD/VDD_IO/VBUS/GND/UART_RX/UART_TX to use
After drawing, please send it to feasy.com for review so as not to have the best bluetooth distance

Function description

Profiles

SPP (Serial Port Profile)
GATTS (Generic Attribute Profile LE-Peripheral)
GATTC (Generic Attribute Profile LE-Central)
HFP-HF (Hands-Free Profile)
HFP-AG (Hands-Free-AG Profile)
A2DP-Sink (Advanced Audio Distribution Profile)
A2DP-Source (Advanced Audio Distribution Profile)
AVRCP-Controller (Audio/Video remote controller Profile)
AVRCP-Target (Audio/Video remote controller Profile)
HID-DEVICE (Human Interface Profile)
PBAP (Phonebook Access Profile)
LEA (Le Audio Profile)

GATT Default service and characteristic

Type	UUID	Characteristic	Description
Service	0xFFF0		throughput services
Write	0xFFF2	Write Write Without Response	app send to module
Notify	0xFFF1	Notify	module send to app

Command description

Terms

Throughout this specification:
Content between { } is optional
Content behind << represents a command from host
Content behind >> represents a response/event to host

Command format

AT+Command{=Param1{,Param2{,Param3…}}}<CR><LF>

All commands start with “AT”, end with <CR><LF>
<CR> means “carriage return”, corresponds to hex value 0x0D
<LF> means “line feed”, corresponds to hex value 0x0A
If command has parameter, parameter follows behind ‘=’
If command has multiple parameters, parameter must be separated by ‘,’
If command has response, response starts with <CR><LF>, ends with <CR><LF>
Module will always report command’s execution result by using “OK” for success or “ERROR” for failure

Example: Get module’s BR/EDR name
<< AT+NAME
>> +NAME=FSC-BT6038A
>> OK

Example: Pick up an incoming call when no call incoming actually
<< AT+HFPANSW
>> ERROR

Event format

<CR><LF>+Event{=Param1{,Param2{,Param3…}}}<CR><LF>

All events start with <CR><LF>, end with <CR><LF>
If event has parameter, parameter follow behind ‘=’
If event has multiple parameters, parameter must be separated by ‘,’

Example: Received “1234567890” from mobile phone via SPP profile

>> +SPPDATA=10,1234567890

Commands table

General commands

AT+HELP - List firmware information and all support command

Command	AT+HELP
Response	<FIRMWARE FUNCTION: appropriate working scenario> <OTA PATH: latest suitable firmware path on server for upgrade On-The-Air> <ENABLED PROFILES: LINKS: ON/OFF> … … <COMMAND SUMMARY: DESCRIPTION: PROFILE CATEGORY>

AT+VER - Get firmware version information

Command	AT+VER
Response	+VER=Param1,Param2,Param3
Description	+VER - Frmware version information

AT+BAUD - Get/Set uart baudrate

Command	AT+BAUD{=Param}
`Param`	9600/ 19200/ 38400/ 57600/ 115200/ 230400/ 460800 500000/ 921600/ 1000000/ 1382400/ 1500000/ 2000000
Response	+BAUD=Param
`Param`	Current baudrate
Description	It takes effect immediately and does not need to be restarted

AT+I2SCFG - Get/Set I2S configuration

Command	AT+I2SCFG{=Param}
`Param`	A base-10 representation of a bit field, for each bit
`BIT[0]`	0: disable 1: enable
`BIT[1]`	0: master 1: slave
`BIT[2]`	0: 48000Hz 1: 44100Hz
`BIT[3]`	0: left justified 1: right justified
`BIT[4]`	0: data 1 bit delay 1: data no delay
`BIT[5:6]`	00: bit depth=16bits 01: bit depth=24bits 10: bit depth=32bits
Response	+I2SCFG=Param
`Param`	Current I2S configuration
Description	It takes effect after the restart

AT+MICGAIN - Get/Set input gain

Command	AT+MICGAIN{=Param}
`Param`	0 ~ 10: Set target value +: Increase -: Decrease
Response	+MICGAIN=Param
`Param`	Current input gain
Description	In usb input mode, the parameter only be +/-, and get the parameter is invalid In I2S/SPDIF input mode, the command is invalid

AT+REBOOT - Soft reboot

Command	AT+REBOOT
Description	Module will disconnect all profiles then reboot

AT+RESTORE - Restore factory settings

Command	AT+RESTORE
Description	Module restore all factory settings then reboot

AT+BTEN - Get/Set bluetooth state

Command	AT+BTEN{=Param}
`Param`	0: Disable 1: Enable
Response	+BTEN=Param
`Param`	Current bluetooth state

AT+LECFG - Get/Set random BLE address state

Command	AT+LECFG{=Param}
`Param`	0: Disable 1: Enable
Response	+LECFG=Param
`Param`	Current state

AT+PROFILE - Get/Set bluetooth profile

Command	AT+PROFILE{=Param}
`Param`	A base-10 representation of a bit field, for each bit:
`BIT[0]`	SPP (Serial Port Profile)
`BIT[1]`	GATT Server (Generic Attribute Profile)
`BIT[2]`	GATT Client (Generic Attribute Profile)
`BIT[3]`	HFP-HF (Hands-Free Profile Handsfree)
`BIT[4]`	HFP-AG (Hands-Free Profile Audio Gateway)
`BIT[5]`	A2DP Sink (Advanced Audio Distribution Profile)
`BIT[6]`	A2DP Source (Advanced Audio Distribution Profile)
`BIT[7]`	AVRCP Controller (Audio/Video remote controller Profile)
`BIT[8]`	AVRCP Target (Audio/Video remote controller Profile)
`BIT[9]`	HID Keyboard (Human Interface Profile)
`BIT[10]`	PBAP Server (Phonebook Access Profile)
`BIT[11]`	LE Audio (LE Audio Profile)
Response	+PROFILE=Param
`Param`	Current profile selection
Description	If modify profile, the module will reboot BT6038A only support SPP, HFP-AG, A2DP Source, AVRCP Target, LEA, GATT Server LEA, GATT Server cannot be uesd together

AT+AUTOCONN - Get/Set poweron auto reconnect

Command	AT+AUTOCONN{=Param}
`Param`	0: Disable 1 ~ 15: Reconnect times
Response	+AUTOCONN=Param
`Param`	Current auto reconnect configuration
Description	In Le Audio, the setting will be invalidated

AT+STAT - Get all state

Command	AT+STAT
Response	+STAT=Param1,Param2,Param3,Param4,Param5,Param6,Param7
`Param1`	+DEVSTAT - Device state
`Param2`	+SPPSTAT - SPP state
`Param3`	+GATTSTAT - GATT state
`Param4`	+HFPSTAT - HFP state
`Param5`	+A2DPSTAT - A2DP state
`Param6`	+AVRCPSTAT - AVRCP state
`Param7`	+LEASTAT - LE Audio state

AT+DEVSTAT - Get device state

Command	AT+DEVSTAT
Response	+DEVSTAT=Param
`Param`	+DEVSTAT - Device state

AT+ADDR - Get BR/EDR MAC address

Command	AT+ADDR
Response	+ADDR=Param
`Param`	Module’s BR/EDR MAC address(12 bytes ASCII)

AT+LEADDR - Get BLE MAC address

Command	AT+LEADDR
Response	+LEADDR=Param
`Param`	Module’s LE MAC address(12 bytes ASCII)

AT+NAME - Get/Set BR/EDR name

Command	AT+NAME{=Param1{,Param2}}
`Param1`	BR/EDR name
`Param2`	0: Disable suffix 1: Enable suffix“XXXX”(lower 4 bytes of MAC address) after name
Response	+NAME=Param
`Param`	BR/EDR name
Description	The name contains a maximum of 31 bytes

AT+LENAME - Get/Set BLE name

Command	AT+LENAME{=Param1{,Param2}}
`Param1`	BLE name
`Param2`	0: Disable suffix 1: Enable suffix“XXXX”(lower 4 bytes of MAC address) after name
Response	+LENAME=Param
`Param`	BLE name
Description	The name contains a maximum of 31 bytes

AT+ADVDATA - Get/Set BLE advertising data

Command	AT+ADVDATA{=Param}
`Param`	advertising data
Response	+ADVDATA=Param
`Param`	advertising data
Description	This parameter must be a hexadecimal string Must br an even length and a maximum of 62 bytes hexadecimal string

AT+COD - Get/Set class of device

Command	AT+COD=Param
`Param`	Class of device(6 bytes ASCII)
Response	+COD=Param
`Param`	Current class of device
Description	Class of device reference COD

AT+PAIR - Get/Set BR/EDR visibility

Command	AT+PAIR=Param
`Param`	0: Exit BR/EDR discoverable mode 1: Enter BR/EDR discoverable mode
Response	+PAIR=Param
`Param`	Current BR/EDR visibility

AT+SCAN - Scan nearby devices

Command	AT+SCAN=Param1{,Param2}{,Param3}
`Param1`	0: Stop scan 1: Scan nearby BR/EDR devices 2: Scan nearby BLE devices
`Param2`	Scan time less than 255 (Unit: s)
`Param3`	0: BLE report like BR/EDR 1: BLE report advertising data 2: Only report support le audio device
Description	+SCAN - Scan result

AT+PLIST - Get/Delete paired list

Command	AT+PLIST{=Param}
`Param`	0: Clear all paired record 1 ~ 8: Clear specific paired record with index MAC(12 bytes ASCII): Clear specific paired record with MAC address
Response1	+PLIST=Param1, Param2{,Param3}
`Param1`	Paired device’s index
`Param2`	Paired device’s MAC address
`Param3`	Paired device’s name(UTF8)
Response2	+PLIST=E
Description	If parameter not exist then list all paired devices

AT+DSCA - Release all connections

Command	AT+DSCA
Description	This command only initiates a disconnect request The actual status depends on the query

AT+TPMODE - Get/Set throughput mode

Command	AT+TPMODE{=Param}
`Param`	0: Disable 1: Enable
Response	+TPMODE=Param
`Param`	Current throughput mode
Description	When SPP/GATT profile connected and throughput mode is on The command will be de-active, every byte received via physical UART will be sent to air

AT+AUXCFG - Get/Set audio input mode

Command	AT+AUXCFG{=Param}
`Param`	0: USB 1: Analog 2: SPDIF 3: I2S
Response	+AUXCFG=Param
`Param`	Current audio input mode
Description	It takes effect after the restart In le audio only support usb and analog

AT+LINKKEY - Get remote device link key

Command	AT+LINKKEY=Param
`Param`	MAC address of target device(12 bytes ASCII)
Response	+LINKKEY=Param1,Param2
`Param1`	MAC address of target device(12 bytes ASCII)
`Param2`	Target device’s link key(32 bytes ASCII)

AT+RSSI - Get remote device rssi

Command	AT+RSSI=Param
`Param`	MAC address of target device(12 bytes ASCII)
Response	+RSSI=Param1,Param2
`Param1`	MAC address of target device(12 bytes ASCII)
`Param2`	Target device’s RSSI
Description	If 0 is returned, the acquisition failed

AT+LINKCFG - Get/Set auto scan and connect

Command	AT+LINKCFG{=Param1{,Param2}}
`Param1`	0: Disable 1: Enable
`Param2`	0: Scan all devices 1: Only scan major service class is rendering or audio

AT+AUDMODE - Get/Set audio mode

Command	AT+AUDMODE{=Param1}
`Param1`	0: BR/EDR mode 1: LE audio broadcast mode 2: LE audio unicast mode
Description	Change this setting module will reboot

AT+PRINT - Get/Set report mode

Command	AT+PRINT{=Param1}
`Param1`	0: Disable 1: Enable
Description	On/Off module actively report a message

HFP commands

AT+HFPSTAT - Get HFP state

Command	AT+HFPSTAT
Response	+HFPSTAT=Param
Param	+HFPSTAT - HFP state

AT+HFPCONN - Establish HFP connection

Command	AT+HFPCONN{=Param}
`Param`	MAC address of target device(12 bytes ASCII)
Description	Reconnect to last HFP device if parameter not exist

AT+HFPDISC - Release HFP connection

Command	AT+HFPDISC
Description	This command only initiates a disconnect request The actual status depends on the query

AT+HFPRING - Simulate incoming call

Command	AT+HFPRING{=Param}
`Param`	Phone number(ASCII)
Description	The phone number contains a maximum of 15 bytes Dial specific number if parameter exist, otherwise redial

AT+HFPANSW - Pick up incoming call

Command

AT+HFPANSW

AT+HFPCHUP - Reject/Hung up call

Command

AT+HFPCHUP

AT+HFPAUDIO - Establish/Release voice audio

Command	AT+HFPAUDIO=Param
`Param`	0: Release voice audio connection with remote hfp sink device 1: Establish voice audio connection with remote hfp sink device

AT+HFPWBS - Get/Set hfp codec negotiation

Command	AT+HFPWBS{=Param}
`Param`	0: Disable hfp codec negotiation 1: Enable hfp codec negotiation
Response	+HFPWBS=Param
Param	Current state

AT+HFPNREC - Get/Set hfp cvc

Command	AT+HFPNREC{=Param}
`Param`	0: Disable hfp cvc 1: Enable hfp cvc
Response	+HFPNREC=Param
Param	Current state

A2DP/AVRCP commands

AT+A2DPSTAT - Get A2DP state

Command	AT+A2DPSTAT
Response	+A2DPSTAT=Param
Param	+A2DPSTAT - A2DP state

AT+A2DPCONN - Establish A2DP connection

Command	AT+A2DPCONN{=Param}
`Param`	MAC address of target device(12 bytes ASCII)
Description	Reconnect to last A2DP device if parameter not exist

AT+A2DPDISC - Release A2DP connection

Command	AT+A2DPDISC
Description	This command only initiates a disconnect request The actual status depends on the query

AT+A2DPCFG - Get/Set A2DP configuration

Command	AT+A2DPCFG{=Param}
`Param`	A base-10 representation of a bit field, for each bit
`BIT[0]`	0: Disable AAC 1: Enable AAC
`BIT[1]`	0: Disable APTX 1: Enable APTX
`BIT[2]`	0: Disable APTX-LL 1: Enable APTX-LL
`BIT[3]`	0: Disable APTX-HD 1: Enable APTX-HD
`BIT[4]`	0: Disable APTX-AD 1: Enable APTX-AD
`BIT[5]`	0: Disable LDAC 1: Enable LDAC
Response	Current A2DP configuration
Description	BT6038A only support APTX, APTX-AD, APTX-HD

AT+A2DPENC - Get A2DP encoder

Command	AT+A2DPENC
Response	+A2DPENC=Param
`Param`	+A2DPENC - A2DP encoder

AT+A2DPAUDIO - Establish/Release A2DP audio connection

Command	AT+A2DPAUDIO=Param
`Param`	0: Release A2DP audio connection with remote a2dp sink device 1: Establish A2DP audio connection with remote a2dp sink device

AT+AVRCPSTAT - Get AVRCP state

Command	AT+AVRCPSTAT
Response	+AVRCPSTAT=Param
`Param`	+AVRCPSTAT - AVRCP state

AT+AVRCPCONN - Establish AVRCP connection

Command	AT+AVRCPCONN{=Param}
`Param`	MAC address of target device(12 bytes ASCII)
Description	Reconnect to last device if parameter not exist

AT+AVRCPDISC - Release AVRCP connection

Command	AT+AVRCPDISC
Description	This command only initiates a disconnect request The actual status depends on the query

AT+AVRCPSPKVOL - Get/Set remote volume

Command	AT+AVRCPSPKVOL{=Param}
`Param`	Volume value(0 - 15)
Description	Set remote volume The command must be sent after AVRCP connection is established And the remote device must support volume control

GATT commands

AT+GATTSTAT - Get GATT state

Command	AT+GATTSTAT
Response	+GATTSTAT=Param
`Param`	+GATTSTAT - GATT state

AT+GATTSEND - Send data via GATT

Command	AT+GATTSEND=Param1,Param2
`Param1`	Payload length(1 ~ 236)
`Param2`	Payload(1~236 bytes)
Description	If throughput mode is on, this command is de-active

SPP commands

AT+SPPSTAT - Get SPP state

Command	AT+SPPSTAT
Response	+SPPSTAT=Param
`Param`	+SPPSTAT - SPP state

AT+SPPDISC - Release SPP connection

Command	AT+SPPDISC
Description	This command only initiates a disconnect request The actual status depends on the query

AT+SPPSEND - Send data via SPP

Command	AT+SPPSEND=Param1,Param2
`Param1`	Payload length(1 ~ 236)
`Param2`	Payload(1~236 bytes)
Description	If throughput mode is on, this command is de-active

LE Audio commands

AT+LEASTAT - Get Le Audio state

Command	AT+LEASTAT
Response	+LEASTAT=Param
`Param`	+LEASTAT - LE Audio state

AT+LEADISC - Release Le Audio connection

Command	AT+LEADISC
Description	This command only initiates a disconnect request The actual status depends on the query Only In le audio unicast mode support

AT+LEACONN - Establish le audio connection

Command	AT+LEACONN=Param1
`Param1`	MAC address of target device(12 bytes ASCII)
Description	Only In le audio unicast mode support

Events table

General events

+VER - Frmware version information

Event	+VER=Param1,Param2,Param3
`Param1`	Module type
`Param2`	Firmware version
`Param3`	Firmware compile time

+DEVSTAT - Device state

Event	+DEVSTAT=Param
`Param`	A base-10 representation of a bit field, for each bit:
`BIT[0]`	0: Power off 1: Power on
`BIT[1]`	0: BR/EDR not discoverable 1: BR/EDR discoverable
`BIT[2]`	0: BLE not advertising 1: BLE advertising
`BIT[3]`	0: BR/EDR not scanning 1: BR/EDR scanning
`BIT[4]`	0: BLE not scanning 1: BLE scanning

+SCAN - Scan result

Event1	+SCAN =Param1,Param2,Param3, Param4,Param5{,Param6{,Param7}}
`Param1`	Index
`Param2`	0: LE public address 1: LE random address 2: BR/EDR address
`Param3`	MAC address(12 bytes ASCII)
`Param4`	RSSI(-127 ~ -1)
`Param5`	Size of Param6 if exist
`Param6`	Device name for BR/EDR devices or advertising data for LE devices
`Param7`	Class of device
Event2	+SCAN=E
Description	Scan finsh

+PAIRED - Pair result

Event	+PAIRED=Param
`Param`	MAC address(12 bytes ASCII) of current pairing device

+I2SSR - I2S sample rate

Event	+I2SSR=Param
`Param`	I2S sample rate

HFP events

+HFPSTAT - HFP state

Event	+HFPSTAT=Param
`Param1`	0: Unsupported 1: Standby 2: Connecting 3: Connected 4: Outgoing call 5: Incoming call 6: Active call

+HFPDEV - HFP remote device information

Event	+HFPDEV=Param1{,Param2}
`Param1`	Remote MAC address(12 bytes ASCII) of current HFP connection
`Param2`	Remote device name(UTF8) of current HFP connection

+HFPCONN - HFP connecting

Event	+HFCONN=Param
`Param`	Remote MAC address(12 bytes ASCII) of current HFP connecting

+HFPAUDIO - HFP voice audio State

Event	+HFPAUDIO=Param
`Param`	0: HFP voice audio disconnected, audio input/output routed to remote device 1: HFP voice audio connected, audio input/output routed to module

+HFPCID - HFP call phone number

Event	+HFPCID=Param
`Param`	Phone number(ASCII)

+HFPSR - HFP sample rate

Event	+HFPSR=Param
`Param`	Sample rate

+HFPHUNG - HFP remote device reject an incoming call or end an ongoing call

Event

+HFPHUNG

+HFPVGS - HFP remote device spker gian

Event	+HFPVGS=Param
`Param`	Remote device spker gain

+HFPVGM - HFP remote device microphone gian

Event	+HFPVGM=Param
`Param`	Remote device microphone gain

A2DP/AVRCP events

+A2DPSTAT - A2DP state

Event	+A2DPSTAT=Param
`Param`	0: Unsupported 1: Standby 2: Connecting 3: Connected 4: Streaming 5: Paused

+A2DPENC - A2DP encoder

Event	+A2DPENC=Param
`Param`	1:SBC 2:APTX 3:APTX-HD 4:APTX-AD

+A2DPDEV - A2DP remote device information

Event	+A2DPDEV=Param1{,Param2}
`Param1`	Remote device’s MAC address(12 bytes ASCII) of current A2DP connection
`Param2`	Remote device’s name(UTF8) of current A2DP connection

+A2DPCONN - A2DP connecting

Event	+A2DPCONN=Param
`Param`	Remote MAC address(12 bytes ASCII) of current A2DP connecting

+A2DPSR - A2DP codec sample rate

Event	+A2DPSR=Param
`Param`	A2DP codec sample rate

+AVRCPSTAT - AVRCP state

Event	+AVRCPSTAT=Param
`Param`	0: Unsupported 1: Standby 2: Connecting 3: Connected

+AVRCPCONN - AVRCP connecting

Event	+AVRCPCONN=Param
`Param`	Remote MAC address(12 bytes ASCII) of current AVRCP connecting

+SPKVOL - Remote spker volume change

Event	+SPKVOL=Param
`Param`	Remote spker volume

+CTVOLUP - volume up

Event	+CTVOLUP
Description	Receive volume up command

+CTVOLDN - volume down

Event	+CTVOLDN
Description	Receive volume down command

+CTPLAY - Track play

Event	+CTPLAY
Description	Receive play command

+CTPAUSE - Track pause

Event	+CTPAUSE
Description	Receive pause command

+CTSTOP - Track stop

Event	+CTSTOP
Description	Receive stop command

+CTFWD - Track forward

Event	+CTFWD
Description	Receive forward command

+CTBACK - Track backward

Event	+CTBACK
Description	Receive backward command

LE Audio events

+LEASTAT - LE Audio state

Format	+LEASTAT=Param
`Param`	0: Unsupported 1: Standby 2: Connecting 3: Connected 4: Streaming 5: Pause

+LEASR - LE Audio sample rate

Format	+LEASR=Param
`Param`	Sample rate

GATT events

+GATTSTAT - GATT state

Format	+GATTSTAT=Param
`Param`	0: Unsupported 1: Standby 2: Connecting 3: Connected

+GATTDATA - GATT received incoming data

Format	+GATTDATA=Param1,Param2
`Param1`	Payload length
`Param2`	Payload

SPP events

+SPPSTAT - SPP state

Format	+SPPSTAT=Param
`Param`	0: Unsupported 1: Standby 2: Connecting 3: Connected

+SPPDATA - SPP received incoming data

Format	+SPPDATA=Param1,Param2
`Param1`	Payload length
`Param2`	Payload

+SPPDEV - SPP remote device information

Event	+SPPDEV=Param1
`Param1`	Remote device’s MAC address(12 bytes ASCII) of current SPP connection

Application scenarios

profiles initializing and change parameter

The following figure shows Profile initialization and name modification

MCU change device name CARKIT reference code:

void change_name(void)
{
    uart_send("AT+NAME\r\n");
    if(uart_read("+NAME",name_buf))
    {
        if(memcmp(name_buf,"CARKIT",6))
        {
            uart_send("AT+NAME=CARKIT,0\r\n");      //defalut disable MAC address suffix
            uart_send("AT+NAME\r\n"); // read bt name
            if(uart_read("+NAME",name_buf))
            {
                if(memcmp(name_buf,"CARKIT",6))
                {
                    //change name fail
                }
                else
                {
                    //change name success
                }
            }
        }
    }
}