BLUETOOTH TTL WITHOUT MODULE

description:

This is the EGBT-046S Bluetooth Modem module that we use in our HT Bluetooth Module.

These modems work as a serial (RX/TX) connection, and are a great wireless replacement for serial cables. Any serial stream from 1200 to 115200bps can be passed seamlessly from your computer to your target. The module has a pin spacing of 1.5mm. This is a 3.3V device and should not be connected to 5V systems without level conversion.

The EGBT-046S Bluetooth Module is a generic Bluetooth device loaded with SPP firmware for UART wireless cable replacement functions. EGBT-046S is permanently programmed as a Bluetooth slave device.
You can use it straight out of the box as a UART wireless cable replacement, without any need to add set-up codes in your microcontroller application.

Specifications

• Radio Chip: CSR BC417
• Bluetooth V2.0
• Memory: External 8Mbit Flash
• Output Power: -4 to +6dbm Class 2
• Range: Up to around 30 feet (10 m)
• Sensitivity: -80dbm Typical
• Bit Rate: EDR, up to 3Mbps
• Interface: UART
• Antenna: Built-in
• Voltage: 3.3V DC

The default configuration is:

• Baud Rate: 9600 bps
• Data : 8 bits
• Stop Bits: 1 bit
• Parity : None
• Handshake: None
• Passkey: 1234
• Device Name: linvor

Bluetooth Module Dimensions

• Width: 27mm
• Height: 13mm
• Pin Spacing 1.5mm

If the default configuration suits your application, then you can use the Bluetooth Module immediately. Once it is paired to a master Bluetooth device, its operation becomes transparent to the user. No user code specific to the Bluetooth module is needed at all in the user microcontroller program.

The Bluetooth Module automatically sets itself up in Command Mode when it is not remotely connected (paired) to any other Bluetooth device. You can change the Passkey, Device Name, and Baud Rate while the module is in Command Mode by entering a small subset of AT style commands. Any changes made will be retained even after power is removed, hence device configuration setup does not need to be repeated unless new changes need to be made.

The Bluetooth Module does not wait for any termination character for each AT command entry. Instead, it acts to whatever character you entered after one second. So, if you are not able to complete a command entry within a second, it will be ignored. Because of this behavior, it may be extremely difficult to do manual entry configuration using Windows Hyperterminal software or similar. Terminal software that allows batch sending of multiple characters must be used.

For this you can use our free HT Comm program.

AT Command Set

All commands MUST be sent in UPPERCASE

1. TEST
Used to test the UART connection between the host controller and Bluetooth Module.

2. Change Baud Rate

where:

Paramater
Response, set to nnnn bps

Valid parameters and responses are:

Note: PC standard COM port hardware does not support baud rates in excess of 115200bps. If you are using a PC to configure EGBT-046S and accidentally set baud rate to these values, connection to a PC COM
port will no longer be possible. Use of USB to Serial converter cable that can work at higher bauds may be necessary to re-establish a connection. Prolific PL-2303 based USB to Serial converter cables are known to work up to 921600bps.

Applications:

·         Bluetooth carkit

·         Pcs

·         Personal Digital Assiatance(PDAs

·         Computer Accessories

·         Access points

·         Digital cameras