Bluetooth serial modules

The bluetooth modules that are offered on ebay all seem to have the same hardware, but have different firmware. This page has some notes on the ones that we have.

Bolutek

Currently used in the GPS from Android to Nikon Camera project.

Initially at 9600bps, commands terminated with crlf and recognized by the following response to AT+VERSION:+BOLUTEK Firmware V2.43, Bluetooth V2.0, HCI V2.1, HCI Rev37, LMP V4, LMP SubV37.Default name is Bolutek and default PIN is 1234.

AT commands

The following tables are from electrodragon.com and have been copied here for reference.

Downlink Command

Command Name	Command	Response	Parameter
testing connection	AT	OK	Null
Check version	AT+VERSION	+VERSION=<Para1>	<Para1>: Firmware version number, the Bluetooth version number, the local HCI version, HCI amendments, LMP version number, LMP sub-version number
check help	AT+HELP	...
check/set name	AT+NAME AT+NAME< Para1>	OK or error	<Para1>：device name
Reset to default	AT+DEFAULT	OK	null
reset	AT+ RESET	OK	null
check/set pins	AT+PIN AT+PIN< Para1>	OK or error	<Para1>: pins
check/set baud rate	AT+BAUD AT+BAUD< Para1>	OK or error	1---1200 2---2400 3---4800 4---9600 5---19200 6---38400 7---57600 8---115200 9---230400 A---460800 B---921600 C---1382400 Default ：4---9600
check/set device type	AT+COD AT+COD< Para1>,<Para2>	OK or error	<Para1>: Local device type (length must be 6 bytes) from the mode is in effect, the end retrieval <Para2>: Filtration equipment type effect in the main mode for filtering search to equipment (if you set 000,000 returns all search equipment) default: 001f00, 000000
check/set module SPP master/slave mode	AT+ROLE AT+ROLE< Para1>	OK or error	<Para1>: 0 --- from the device; 1 --- master; Default: 0 from equipment
check/set GIAC	AT+IAC< Para1>	OK or Error	<Para1>: The query access code, default value: 9e8b33 specific settings, see Appendix 2: query access code Description
check/set remote bluetooth device name	AT+RNAME< Para1>	OK or Error	<Para1>: remote Bluetooth device address
check/set inquiry mode	AT+INQM<Para1>,<Para2>,<Para3>	OK or Error	<Para1>: Query mode: 0: inquiry_mode_standard,1: inquiry_mode_rssi, 2: inquiry_mode_eir, Length: 1 byte, <Para2>: Up Bluetooth Device response, Length: 2 bytes, <Para3>: Query timeout, Timeout range :1-30(Converted into time :1.28-61.44 seconds), Length: 2 bytes, Default: 1,9,30 (16 hex)
check/set connection mode	AT+CMODE< Para1>	OK or Error	<Para1>: 0: specified Bluetooth address connected mode (specified Bluetooth address set by the BIND command) 1: Any Bluetooth address connection mode (not the BIND command set address the constraints), the default value:
check/set bluetooth address	AT+BIND<Para1>	OK or Error	<Para1>: Set binding Bluetooth address format: 11,22,33,44,55,66 Reply the Bluetooth address format: 11:22:33:44:55:66 Default: 00:00:00:00:00:00
clear memory address	AT+CLEAR	OK	Null
check/set UART MODE	AT+ UARTMODE<Para1>,<Para2>	OK or Error	<Para1>: Stop bit: 0:1 stop bit, 1:2 stop bit <Para2>: Parity: 0: no parity, 1: Odd, 2: Even parity, default value: 0,0
check local BT address	AT+LADDR	+LADDR=<Para1>	<Para1>: Local Bluetooth address, for example: 11:22:33:44:55:66
checkt BT module working status	AT+STATE	+STATE=<Para1>	Example
check/set Remote Bluetooth device automatically search	AT+ AUTOINQ<Para1>	Ok or Error	0=no, 1=yes
check remote bluetooth device	AT+INQ	Ok	null
cancel check remote bluetooth device	AT+INQC	Ok	null
check/set Whether to automatically connect to a remote Bluetooth device	AT+ AUTOCONN<Para1>	OK or Error	0=Not Auto, 1= Auto
Connect to remote bluetooth device	AT+CONNECT<Para1>	OK or Error	<Para1>: Set the remote bluetooth address format: 11,22,33,44,55,66 Reply Bluetooth address format: 11:22:33:44:55:66
check/set Page scan and inquiry scan parameters	AT+IPSCAN<Para1>,<Para2>,<Para3>,<Para4>	OK or Error	<Para1>: Query interval <Para2>: Query duration <Para3>: Paging time intervals <Para4>: Paging duration The above parameters are hexadecimal numbers. Default: 800,12,800,12
check/set Encrypt mode	AT+SENM<Para1>,<Para2>	OK or Error	<Para1>: Safe mode, the following values (1 byte): 0 - sec_mode0_off 1 - sec_mode1_non_secure 2 - sec_mode2_service 3 - sec_mode3_link 4 - sec_mode4_ssp <Para2>: Encryption mode, the following values (1 byte): 0 - hci_enc_mode_off 1 - hci_enc_mode_pt_to_pt 2 - hci_enc_mode_pt_to_pt_and_bcast Default: 0,0
Check/set low power Mode	AT+ LOWPOWER<Para1>	ok or error	0=not support, 1=support, default =1
check/set sniff energy save mode	AT+SNIFF<Para1>,<Para2>,<Para3>,<Para4>	ok or error	<Para1> - max time, <Para2> - min time, <Para3> - trial time, <Para4> - timeout time
check/set indication upward command	AT+ENABLEIND<Para1>	ok or error	0= close, 1= open, default 1
check Bluetooth pairing list	AT+LSP	LSP=<Para1>,<Para2>,<Para3> …… LSP=E	<Para1>：number（0-7） <Para2>：bluetooth address code <Para3>：name default feedback：LSP=E
Clear all bluetooth pairing list	AT+RESETPDL	Ok	-
clear selected bluetooth pairing record	AT+REMOVEPDL<Para1>	OK	<Para1>：number（0-7）
check/set linkloss checking time	AT+SUPERVISION<Para1>	Ok or error	<Para1> response time, unit in second (Hex), default 5

Uplink Command list

Command Name	Command	Response	Parameter
ready	+READY	-	-
inquiry status	+INQUIRING	-	-
inquiry pairing status	+PAIRABLE	-	-
connecting	+CONNECTING<Para1>	-	-
connected	+CONNECTED	-	-
connection fail	+CONNECTION FAILED	-	-
report remote bluetooth device name	+RNAME=<Para1>	<Para1>： report remote bluetooth name
report inquiry result	+INQS start inquiry +INQ=<Para1>,<Para2>,<Para3> …… device information +INQE inquiry completed	<Para1>：bluetooth address format：11:22:33:44:55:66 <Para2>：device type <Para3>：RSSI signal strength (normal is decimal) signal strengthness (default in decimal return 7fff when is not available)

Connecting using Ubuntu

Adapted from this askubuntu answer:

use hcitool scan to find the device
pair the device in the bluetooth gui menu
make sure /etc/bluetooth/rfcomm.conf contains the following:

rfcomm0 {
        bind no;
        device <mac address>;
        channel 1;
        comment "Serial Port";
        }

(differing from askubuntu.com) sudo rfcomm bind rfcomm0 <mac address>