Nebusens n-Core Sirius A Device User manual

Rev. 20130823
n-Core®Sirius A Device
User Manual

1
Sirius A User Manual
Table of contents
1. Introduction.......................................................................................................................2
2. Technical features ............................................................................................................3
3. Pinout .................................................................................................................................4
4. Power supply.....................................................................................................................5
4.1. On/Off mode................................................................................................................................................. 5
4.2. Reset................................................................................................................................................................ 5
5. Input and output interfaces .............................................................................................5
5.1. GPO ................................................................................................................................................................. 6
5.2. GPI ................................................................................................................................................................... 6
5.3. ADC ................................................................................................................................................................. 7
5.4. I2C..................................................................................................................................................................... 8
5.5. SPI..................................................................................................................................................................... 8
5.6. USART............................................................................................................................................................... 9
5.6.1. USB ........................................................................................................................................................... 9
5.6.2. DB-9/RS-232............................................................................................................................................ 9
5.7. LED ................................................................................................................................................................. 10
6. Radio................................................................................................................................10
7. Firmware updates...........................................................................................................10
8. Accessories.....................................................................................................................11
9. Recommendations of use and security .......................................................................11
10. Additional information ...................................................................................................12

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Sirius A User Manual
1. Introduction
Sirius A is a radio frequency device that offers a total solution to build wireless networks based on the IEEE
802.15.4/ZigBee™ standard in a fast and easy way.
Its robust design provides an extraordinary connectivity and versatility to adapt to a wide range of
applications. It has several communication ports and input/output interfaces, which allows integrating a
great number of external devices such as, for example, sensors, actuators or even computers, among
others.
Sirius A forms part of the n-Core®platform, developed by Nebusens. n-Core®offers a set of hardware and
software tools capable for covering all your necessities of development and deployment of wireless
networks based on the IEEE 802.15.4/ZigBee™standard.
For more information about the n-Core® platform, please visit www.nebusens.com
G
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A
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U
US SA AR RT T ( (U US SB B) )
U
US SA AR RT T ( (R RS S- -2 23 32 2) )
R
RE EL LA AY YS S ( (G GP PO O) )

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Sirius A User Manual
2. Technical features
Electrical characteristics
Independent power supply (DC IN)
5 –9V
Mini-USB power supply
5V
Power switch
ON/OFF
Physical characteristics
Dimensions
111.8 x 107.7 x 26.3 mm
Micro-controller
Model
ATMEGA1281V
Frequency
8MHz
Flash
128KB
RAM
8KB
EEPROM
4KB
External EEPROM
256KB (AT25F2048)
Radio
900MHz
Transceiver
AT86RF212
Frequency band
868 to 868.6MHz (Europe)
902 to 928MHz (USA)
Number of channels
1 (Europe), 10 (USA)
Channel spacing (USA)
2MHz
Maximum power transmission
(software-controlled)
+10dBm
Sensitivity
-110dBm
Data transmission rate
20 –100Kbps (Europe)
40 –250Kbps (USA)
2.4GHz
Transceiver
AT86RF231
Frequency band
2405 to 2480MHz
Number of channels
16
Channel spacing
5MHz
Maximum power transmission
(software-controlled)
+15dBm
Sensitivity
-101dBm
Data transmission rate
250Kbps
Connectivity
UART through USB/DB-9
1: Manual/SW selection
2: UART through USB/DB-9
SPI
10-pin connector
I2C Master (pull-up)
Programming port
Mini-JTAG
Opto-coupled digital outputs (x4)
TTL-CMOS compatible
0 –5V, 50mA. Independent external power supply
Opto-coupled digital inputs (x4)
TTL-CMOS compatible
0 –6V, 0 –50mA
ADC (x2)
0 –1.25V
Relay sockets (x2)
SPDT: N.C., COM, N.O.
Test: 12V@2A
UART through USB
Silabs CP2103 Virtual Com Port
UART through DB-9
RS-232 (TXD, RXD, CTS, RTS, DTR)
LED (x2)
Green/Red

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Sirius A User Manual
3. Pinout
Block E2
Block P2
Block P6
1
GPO_1
1
3.3 V output (controlled)
1
TCK
2
GPO_2
2
I2C SDA
2
GND
3
GPO_3
3
SPI_CLK
3
TDO
4
GPO_4
4
I2C SCL
4
3.3 V output (permanent)
5
GPO_VCC_IN
5
SPI_MOSI
5
TMS
6
GND
6
ADC_3
6
RESET
7
GND
7
SPI_MISO
7
N/C
8
GPI_1
8
3.3 V output (permanent)
8
N/C
9
GPI_2
9
3.3 V (USB-dependent)
9
TDI
10
GPI_3
10
GND
10
GND
11
GPI_4
12
ADC_2
Block E1 (RLY1)
Block E1 (RLY2)
13
ADC_1
1
COM
1
COM.
14
GND
2
N.C.
2
N.C.
15
GND
3
N.O.
3
N.O.
16
I2C SDA
17
I2C SCL
18
5V IN
19
GND

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Sirius A User Manual
4. Power supply
Sirius A device has two alternatives for power supply:
2-pole connector in block E2 (pins 18-19): 5 –9V DC.
Type B-Mini USB connector in block E1: 5V DC.
Both connections can be established simultaneously, without
influencing in the normal operation of the device.
4.1. On/Off mode
On/Off button of Sirius A device is placed in block E1. This switch
allows eliminating completely the power supply of the device.
1. Device switched off
2. Device switched on
4.2. Reset
Reset button of Sirius A device is placed in block E2. This button
reinitiates the routines programmed in the device, without
affecting data stored in EEPROM.
5. Input and output interfaces
Sirius A device has the following input and output interfaces:
4 opto-coupled digital outputs (GPO)
2 relay ports (GPO) SPDT configuration
4 opto-coupled digital inputs (GPI)
2 software-configurable as IRQs
3 analog-to-digital converter (ADC)
2 general-purpose
1 in DC-IN
2 LEDs (green and red)
1 I2C bus (internal pull-up)
1 SPI bus
1 USART accessible from outside
USB (Virtual Com Port)
RS-232 (DB-9)
All input and output interfaces available in Sirius A device are next described.
18-19
USB
1
2

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Sirius A User Manual
5.1. GPO
Sirius A device has four general-purpose opto-coupled
digital outputs (LTV847S
1
), accessible from the block E2
(pins 1 - 4).
Voltage and current characteristics for each GPO are
determined by the transistors of the opto-coupler LTV847S.
Next, it is shown the connections for each of the outputs.
The GPO_VCC_IN (block E2, pin 5) is the union of all the collectors of the opto-transistors of the LTV847S.
Each GPO output corresponds with the emitter of an opto-transitor of the LTV847S. In order to activate the
GPO is necessary to supply a voltage between 3.3V and 5V (recommended) to GPO_VCC_IN input. This
voltage will be transmitted to each GPO, considering the losses of each LTV847S opto-transistor.
5.2. GPI
Sirius A device has four general-purpose opto-coupled
digital inputs (LTV847S1), accessible from the block E2 (pins
8 - 11). GPI3 (pin 10) and GPI4 (pin 11) can be configured
as external interruptions (IRQs).
Voltage and current characteristics for each GPI are
determined by the LEDs of the opto-coupler LTV847S.
Next, it is shown the connections for each of the opto-coupled digital inputs.
1
http://www.us.liteon.com/downloads/LTV-817-827-847.PDF
IMPORTANT NOTE: In order to use the GPOs is necessary
that reference pins (GND) of both the Sirius A device
(block E2, pins 6 and 7) and the input device (for
example, an actuator) are connected to each other.

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Sirius A User Manual
5.3. ADC
Sirius A device has three analog-to-digital converters. Two
of them are accessible from the block E2. ADC_1 and
ADC_2 are for general purposes (pins 12 and 13). ADC_0 is
connected directly to DC-IN (pin 18), allowing the
monitoring of the voltage used to power the device.
The reference voltage of the microcontroller is 1.25V. The
voltage range for ADC_Xexternal input is from 0V to 3.75V.
Next, it is shown the connections of analog-to-digital
converters accessible from outside in the block E2.
This type of connection implies a difference between
the voltage supplied to the external ADC input
(ADC_Xexternal) and the voltage registered by the
microcontroller in the internal ADC input
(ADC_Xinternal). The relation between both is given by
the expression:
𝑨𝑫𝑪𝑿𝒊𝒏𝒕𝒆𝒓𝒏𝒂𝒍 =𝑨𝑫𝑪_𝑿𝒆𝒙𝒕𝒆𝒓𝒏𝒂𝒍
𝟑
A similar behavior is observed for the analog-to-digital converter (ADC_0)
connected to the DC-IN power supply. Therefore, the relation between the
power supply voltage and the voltage read at ADC_0 can be calculated as:
𝑨𝑫𝑪𝟎𝒊𝒏𝒕𝒆𝒓𝒏𝒂𝒍 =𝑽𝑪𝑪_𝑰𝑵
𝟏𝟏
IMPORTANT NOTE: In order to use the GPI is necessary
that reference pins (GND) of both the Sirius A device
(block E2, pins 6 and 7) and the input device (for
example, a sensor) are connected to each other.
IMPORTANT NOTE: In order to use the ADC is necessary
that reference pins (GND) of both the Sirius A device
(block E2, pin 14) and the input device (for example, a
sensor) are connected to each other.

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Sirius A User Manual
5.4. I2C
Sirius A device has an internally pulled-up I2C bus,
accessible from the block E2 (pins 15 - 17) and from the
internal block P2 (pins 2 - 4).
Electrical and protocol characteristics of I2C bus are
determined by the specifications of the ATmega1281V®
2
microcontroller.
I2C_SDA (block E2, pin 16, and block P2, pin 2) and
I2C_SCL (block E2, pin 17, and block P2, pin 4) lines have
internal pull-up as is shown below:
5.5. SPI
Sirius A device has a SPI bus, accessible from the block P2
(pins 3, 5 and 7).
Electrical and protocol characteristics of SPI bus are
associated to the specifications of the ATmega1281V®
3
microcontroller.
2
http://www.atmel.com/dyn/resources/prod_documents/doc2549.pdf (section 12.3.4 Alternate Functions of Port D, p. 83; section 30. Electrical Characteristics, p. 367).
3
http://www.atmel.com/dyn/resources/prod_documents/doc2549.pdf (section 13.3.2 Alternate Functions of Port B, p. 79).
IMPORTANT NOTE: In order to use the I2C bus is
necessary that reference pins (GND) of both the Sirius A
device (block E2, pin 15) and the input device (for
example, a sensor) are connected to each other.
IMPORTANT NOTE: In order to use the SPI bus is
necessary that reference pins (GND) of both the Sirius A
device (block P2, pin 10) and the input device (for
example, a sensor) are connected to each other.

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Sirius A User Manual
5.6. USART
Sirius A device has a USART serial communications port,
accessible from the block E1 through USB and RS-232 ports.
USART can be used to communicate the Sirius A device
with other devices that have serial communication
capacities, for example, a PC. Likewise, USART can also be
used to update the device firmware as described in
Section 6 of this manual.
Access to USART is exclusive for each port, so they cannot
be used simultaneously. Selection of the active port is
done through the switch SW2 (USB/DB-9). SW2 (Man/uC)
must be always in position 0.
5.6.1. USB
The USART1 of the ATmega1281V®microcontroller in Sirius A
device is connected to USB port through Silabs USB-Serial
converter, model CP2103
4
.
This port is recognized by the operating system, such as Windows®, as a virtual serial port (Virtual Com Port)
5
,
and it allows supplying power to the Sirius A device simultaneously to the establishment of the
communication with it.
5.6.2. DB-9/RS-232
The USART1 of the microcontroller ATmega1281V®in Sirius A
device is also connected to a DB-9 port through a level-
converter, allowing connections with any device that
accomplishes RS-232 standard.
Configuration of DB-9 port pins corresponds to a DCE (Data Circuit-terminating Equipment). Therefore, a
null-modem cable is necessary in order to connect the Sirius A device to a PC.
1
NC
2
RXD
3
TXD
4
NC
5
GND
6
DSR
7
RTS
8
CTS
9
NC
4
http://www.silabs.com/support/pages/support.aspx?ProductFamily=USB%20to%20UART
5
http://www.silabs.com/products/mcu/Pages/USBtoUARTBridgeVCPDrivers.aspx
Bit rate
9600 bps –115200 bps
Data bits
8
Parity
None
Stop bits
1
Flow control
Hardware/None
SW2 (Man/uC)
SW2 (USB/DB-9)
Selection
0
0
USB
0
1
DB-9