User Manual
Version 1.6
2017-12-10
RaspBee
– ZigBee addon board
www.dresden-elektronik.de
Page 8 of 27
Communication between RPi and RaspBee is established via UART interface by using a
proprietary protocol. The application protocol frames which are used by the deCONZ
application to communicate with the microcontroller are encapsulated in the Serial Line
Internet Protocol (SLIP).
The used signals are TXD and RXD without any handshake signals. It is important to enable
the access to RPi serial port (see
Section 6.1.2
) to ensure the proper function. Two user
LEDs (red, green) are available to show RaspBee status. The low-active reset signal can be
controlled by the RPi and will cause a hardware reset of the built-in microcontroller. An
onboard 10k pull-up resistor avoids an unintended reset trigger.
Via a service adapter footprint the JTAG signals of the built-in microcontroller are available.
In delivery state the adapter header is not assembled. See
Section 11.1
modification.
The 2.4 GHz radio module has two RF output traces. In default delivery state, only one RF
line is used which is routed to the assembled onboard chip antenna. Each firmware shall
ensure that the correct RF port gets selected. Although the chip antenna covers most of the
applications it is also possible to use an external antenna. This requires custom modifications
described in
Section 11.2
deRFmega256-23M12
JTAG
UART
VCC
4.5V to 5.5V
Reset
RFout 1
RFout 2
LDO
Vout
3.3V
LED1
LED2
Chip-Ant.
Coax-Conn.
GPIO
GPIO
GPIO
Figure 2: Block Diagram
4. Quick start
This section describes in short steps a fast start-up of the RaspBee board to control and
monitor a ZigBee network. Detailed descriptions about the firmware, software and
functionality can be found in
Section 6
4.1.
Content of delivery
One shipped RaspBee package contains the following:
1x RaspBee board
