TTL Bluetooth Dongle
Wireless data comms made easy
Published in issue 398, February 2010
Need to connect your circuit to a PC to transfer measurement values or data? How about wirelessly? If you think that would be way too complex, think again. The solution offered here is a Bluetooth device which from your circuit’s point of view looks just like a UART with a PC (or other device) attached to the other end. It’s as simple as plugging in a USB to TTL cable but without the wires!
- SPP Protocol fully Integrated 'on chip' (other Bluetooth devices behave as if they are connected via a serial cable)
- No configuration necessary in slave mode, Plug & Play like a USB to TTL cable
- Module can be configured as master via the UART allowing two modules to communicate
- Communication up to 921600 Baud (configurable from 2400 to 921600 Baud using jumpers or software)
- 5 V supply uses an on-board voltage regulator
- Pin compatible with the USB to TTL adapter cable from FTDI
- Direct interface with microcontroller (3.3 V) possible
- UART including handshake signals
- 2 LEDs indicating Bluetooth link status and traffic
- Expansion with an external audio codec possible
- Low power mode using optional 32 kHz crystal
Click below to download a PDF copy of this article from Elektor magazine.
Please note. In view of the complexity of international markets, Elektor cannot guarantee the availability of components for this project.