BT900 Development Kit
Version 0.3
Embedded Wireless Solutions Support Center:
http://ews-support.lairdtech.com
www.lairdtech.com/wireless
5
Laird Technologies
Americas: +1-800-492-2320
Europe: +44-1628-858-940
Hong Kong: +852-2268-6567 x026
3
DVK-BT900–
M
AIN
D
EVELOPMENT
B
OARD
This section describes the BT900 development board hardware. The BT900 development board is delivered with the
BT900 series module loaded with integrated
smart
BASIC runtime engine FW but no onboard
smart
BASIC
application; because of this, it starts up in AT command mode by default.
smart
BASIC applications are simple and easy to develop for any BT / BLE application. Sample
smart
BASIC
applications are available to download from the
or via the Technical Support Site
https://laird-ews-support.desk.com/
The BT900 development board is a universal development tool to highlight the capabilities of the BT900 module. The
development kit is supplied in a default configuration which should be suitable for multiple experimentation options.
It also offers a number micro-DIP switches that help isolate on-board sensors and UART from the BT900 module to
create different configurations. This allows you to test different operating scenarios.
The development board allows the BT900 series module to physically connect to a PC via the supplied USB cable for
development purposes. The development board provides USB-to-Virtual COM port conversion through a FTDI chip –
part number
. Any Windows PC (XP or later) should auto-install the necessary drivers; if your PC cannot locate
the drivers, you can download them from
http://www.ftdichip.com/Drivers/VCP.htm
3.1
Key Features
The BT900 development board has the following features:
BT900 series module soldered on-board.
Power supply options for powering development board from:
-
USB
-
external DC supply
-
AAA batteries (3xAAA battery holder fitted on underside of development board)
Regulated 3.3 V for powering the BT900 module. Optional regulated 1.8 V for powering the BT900 module.
NOTE: 1.8V operation not supported in BT900 module
smart
BASIC runtime engine FW v9.1.2.0.
USB to UART bridge (FTDI chip).
BT900 UART can be interfaced to:
-
USB (PC) using the USB-UART bridge
-
External UART source (using IO break-out connector when development board powered from DC jack)
Current measuring (for BT900 module only) options:
-
Pin header (Ammeter)
-
Current shunt monitor IC (volt meter or oscilloscope)
-
Series resistor for differential measurement (oscilloscope)
IO break-out (four 2x5-pin 2.54mm pitch headers) connectors interface for plugging-in external
modules/sensors, and accessing all interfaces of the BT900 module [UART, SPI, I2C, SIO (DIO or AIN (ADCs)),
PWM, FREQ].
Two Buttons and two LEDs for user interaction.
Two on-board sensors (analogue output): Temperature and Trim Pot.
One buzzer.
One on-board SPI sensor/device (serial Eeprom).
One on-board I2C sensor /device (RTC chip).
Micro DIP switches that allow the on-board sensors, LED’s (and USB UART FTDI bridge) to be disconnected
from BT900 module.
