BlueSnap Specifications

Operating Modes

Mode Description Command
Slave Mode Slave Mode is the default mode of the BlueSnap. While in this mode, other Bluetooth devices can discover and connect to the BlueSnap. SM,0
Master Mode Master Mode enables the ability to make outbound connections via the C command. SM,1
Trigger Mode Trigger Mode configures the BlueSnap to connect to the remote stored address automatically when data is received on the local serial port of the master. SM,2
Auto Master Mode Auto Master Mode configures the BlueSnap to automatically connect to the stored remote Bluetooth address upon power up. SM,3
Auto DTR Mode ¹ Auto DTR Mode is similar to Auto Master Mode, except that automatic connection only occurs when the DTR line is set. SM,4
Auto Any Mode ¹ Auto Any Mode configures the BlueSnap to perform an inquiry when switch #3 is in the ON position. The BlueSnap will attempt to connect to the first device found via the inquiry per the COD filter (if set). SM,5

¹ BlueSnap USB Only

Configuration Switches

PIN Name Description
4 Baud Rate If configured with the proper firmware, PIN-4 toggles the baud rate between 115200 (OFF) and 9600 (ON).
3 Auto Master Turning this switch to the ON position, will configure the BlueSnap to auto-connect to a remote stored address in Master Mode. 
2 Auto Discover In Slave Mode, PIN-2 switch the the ON position, will set a special class of device, which is used by a remote BlueSnap Standard Master to auto-connect.
1 Factory Defaults PIN-1 can be used to perform a hard reset (reset factory defaults). To reset the factory defaults, switch PIN-1 to the ON position, power on the unit, then toggle PIN-1 from ON to OFF twice.

Switch Configurations for Instant Cable Replacement Example

Two BlueSnap adapters can be used as an "instant cable replacement" for an RS-232 device. Meaning that the two adapters work to replace the previously cabled connection with a Bluetooth connection.

LED Indicators 

Green LED

The  green LED  indicates the state of the BlueSnap by the speed at which it flashed. Refer to the table below.

Green LED Rate Mode
Flashes 10 times per second Configuring
Flashes two times per seconds Booting-up or Remote Configuration
Flashes once per second Discoverable or Idle
Solid (no flashing) Connected

Yellow LED

The  yellow LED  indicates the physical state of the data pins. The yellow LED flashes while data is being received or transmitted on the TX and RX pins.

Red LED

The  red LED  indicates that the power is ON (BlueSnap AAA models only).

Blue LED

The  blue LED  flashes to indicate when the BlueSnap AAA is powered ON or OFF.