ZEPIRO D2O VCP User manual

D2O®VCP
Product
Manual
Version 1.0
May 2021
© Zepiro

ii - D2O VCP Product Manual
DISCLAIMER
While great eorts have been made to assure the accuracy and clarity of
this document, Zepiro assumes no liability resulting from any omissions
in this document, or from misuse of the information obtained herein. The
information in this document has been carefully checked and is believed to be
entirely reliable with all of the necessary information included. Zepiro reserves
the right to make changes to any products described herein to improve
reliability, function, or design, and reserves the right to revise this document
and make changes from time to time in content hereof with no obligation to
notify any persons of revisions or changes.
Zepiro does not assume any liability arising out of the application or any
use of any product or circuit described herein; neither does it convey licence
under its patent rights or the rights of others.
PROPRIETARY
© Zepiro 2020-2021
No part of this technical manual may be reproduced, transmitted, transcribed,
stored in a retrieval system, or translated into any language or computer
language, in any form or by any means, without prior written permission of
Zepiro.
LEGAL
Zepiro® and D2O® are registered trademarks of MASS Electronics Pty Ltd
trading as Zepiro.
REVISION HISTORY
VERSION DATE CHANGE SUMMARY
1.0 May 2021 Document First Revision

D2O VCP Product Manual - iii
1. GETTING STARTED 1
1.1 THE ZEPIRO D2O VCP 1
1.2 KEY FEATURES 1
1.3 MODES OF OPERATION 1
1.4 APPLICATIONS 2
1.5 IN THE BOX 2
1.6 ACCESSORY ITEMS 2
1.7 D2O UNIT FEATURE IDENTIFICATION 3
1.8 OTHER TOOLS REQUIRED 3
2. DATA GUIDE 4
2.1 INTRODUCTION 4
2.2 INPUT DATA FROM ATTACHED DEVICES 4
2.3 SYSTEM DATA 4
2.4 NOTIFICATIONS DATA 5
3. INSTALLATION 6
3.1 ANTENNA BASICS 6
3.2 SITE SELECTION 7
3.3 MINIMUM CLEARANCE 9
3.4 PRE-ASSEMBLY 9
3.5 D2O INTERFACE CABLE ATTACHMENT 9
3.6 POST MOUNTING 10
3.7 MAST MOUNTING 10
3.8 SECURING 11
4. WIRING GUIDE 12
4.1 INTRODUCTION 12
4.2 4-PIN M12 TO USB-A CABLE 12
4.3 8-PIN M12 INTERFACE CABLE 12
5. OPERATION GUIDE 13
5.1 BEFORE STARTING 13
5.2 STARTING THE D2O 13
5.3 SHUTTING DOWN THE D2O 13
5.4 CONNECTING TO A COMPUTER 14
5.5 DISCONNECTING FROM A COMPUTER 14
5.6 NORMAL OPERATION 15

iv - D2O VCP Product Manual
6. D2O VCP PROGRAMMING 16
6.1 INTRODUCTION 16
6.2 PRE-PROGRAMMING CHECKLIST 16
6.3 START-UP SEQUENCE 16
6.4 SERIAL TERMINAL SETTINGS 17
6.5 VT100 TERMINAL EMULATION OPTION 17
7. SERIAL COMMANDS 18
7.1 INTRODUCTION 18
7.2 ADMINISTRATION SETTINGS 18
7.3 COMMAND LIST 19
7.4 COMMAND DETAILS 21
8. TROUBLESHOOTING 29
8.1 OPERATIONAL TROUBLESHOOTING 29
8.2 SERIAL TERMINAL TROUBLESHOOTING 30
9. SPECIFICATIONS 31
9.1 TECHNICAL SPECIFICATIONS 31
9.2 REGULATORY & RADIATION INFORMATION 31
9.3 PRODUCT DIMENSIONS 32

D2O VCP Product Manual - 1
The Zepiro® D2O® (Direct-To-Orbit) VCP is a satellite telemetry solution that
takes periodic measurements from devices that can provide an appropriate
voltage, current or pulse signal. It is ideally suited to use in remote or diicult
to access areas and can transmit from virtually any surface location globally.
It is a low-power device designed for endurance, maintenance-free monitoring
applications with the included battery capable of providing power for up to
four years.
Once setup, the D2O VCP eiciently packages the data messages from the
connected device(s), and sends them via a low-earth orbit satellite network
back to a terrestrial ground station. From there Zepiro’s servers securely
recompile the data packets to readable formats and forwards the data to the
end user for analysis.
1.1 THE ZEPIRO D2O VCP
• Integrated satellite transceiver
• Integrated GPS receiver
• Low power micro processor for data acquisition
• Multiple modes of operation to suit a variety of scenarios and devices
• Internal non-rechargeable battery pack (serviceable)
• Single protected M12 8-Pin Interface connector to device
• Separate USB interface to allow for “as installed” commissioning and
validation via Serial Terminal soware
• Self-contained in rugged housing to suit harsh environments (Pending IP67
testing)
1.2 KEY FEATURES
The VCP can operate in a range of dierent modes to suit the application at
hand. These preconfigured modes can be assigned during the setup process
using the Serial Terminal soware and Command Line Interface (CLI). This
process is explained further in the Serial Commands section of this Product
Manual.
An overview of the modes of operation are provided below:
1.3 MODES OF OPERATION
MODE DESCRIPTION
Analogue Takes hourly measurements of the selected 10V, 5V or 20mA input
Pulse Takes hourly measurements of the pulse counter input and reports the running pulse counter total every 8 hours
Combined Takes measurements every 2 hours from both the selected analogue 10V, 5V or 20mA input and the pulse counter
input. It also reports the running pulse counter total every 8 hours
Analogue with
Pulse Totals
Takes hourly measurements of the selected 10V, 5V or 20mA input as well as reporting the running pulse counter total
every 8 hours

2 - D2O VCP Product Manual
The Zepiro® D2O® (Direct-To-Orbit) VCP is ideally suited to monitoring
applications in many industries including the following examples:
• Metering
• Water Quality and Management
• Weather and Meteorological
• Bores and Ground Water
• Agriculture & Livestock
• Remote Asset & Infrastructure Monitoring
• Mining
• Scientific Reporting
1.4 APPLICATIONS
The D2O VCP is provided with the following items:
Zepiro D2O VCP Unit D2O Antenna and Serrated
Tooth Washer
8-Pin M12 Interface Cable
1.5 IN THE BOX
4-Pin M12 To USB-A Cable
The following item is available separately:
1.6 ACCESSORY ITEMS

D2O VCP Product Manual - 3
1. Antenna Base
2. Battery Switch
3. 4-Pin M12
Connector
& Dust Cap
4. Product Identification Label
6. 8-Pin M12
Connector
5. Hex Head
Grub Screw
1.7 D2O UNIT FEATURE IDENTIFICATION
A Computer capable of running a Serial Terminal soware application, with a
USB-A port, capable of supplying at least 500mA of current.
Computer
A wide, flat blade screwdriver or small coin (such as AUD 10 cents, or USD
quarter) is required to rotate the Battery Switch on the D2O unit.
Flat Blade Screwdriver or Coin
A 2.5mm Allen Key or other Hex Drive is needed to fasten the D2O’s Hex Head
Grub Screw, which is used to secure the device to its mount.
2.5mm Allen Key, or Other 2.5mm Hex Drive
1.8 OTHER TOOLS REQUIRED
The Computer must have a Serial Terminal soware application installed
on the operating system. The D2O VCP, once connected to the computer by
the 4-Pin M12 To USB-A Cable, is programmed by a Command Line Interface
(CLI) using the Terminal Soware application. A recommended terminal
application for the Windows® operating system is:
Serial Terminal Software Application
Tera Term
https://osdn.net/projects/ttssh2/releases/

4 - D2O VCP Product Manual
DATA DESCRIPTION
Pulse Counter Total The total input pulses that have been recorded since the D2O’s initial deployment (will be 0 in Analogue Mode)
Mode The currently set mode of operation - See the Serial Commands section of this product manual for more
information
Data Points Up to 8 hourly measurements from the connected input(s), corresponding to the configured mode of operation.
The number of measurements included in an individual message may vary within a 24hr period based on
synchronisation time settings
Pulse Counter Total The remaining battery charge of the D2O as a percentage, at 1% resolution
Device Integrity Info Basic information to indicate that the system is performing as intended without alert, tamper or fault
2.1 INTRODUCTION
The D2O will transmit a range of data during its normal operation. In addition
to the regularly transmitted core input data from the connected devices, the
D2O will also periodically transmit system and notification data relating the
ongoing operation and health of the D2O Unit.
Data is optimised for transmission through the satellite network, and is then
uncompressed and formatted for analysis by the Zepiro servers before being
presented for end use.
The following tables indicate the data that will be transmitted at various times
during the D2O deployment.
This data includes the readings and parameters associated with the input
from the connected voltage, current or pulse devices, as well as indicates the
data integrity. This data is typically transmitted 3 times a day.
2.2 INPUT DATA FROM ATTACHED DEVICES
DATA DESCRIPTION
Battery Information Includes the current battery voltage and remaining charge level as a percentage
Module Temperature The temperature of the PCB board within the D2O enclosure in Degrees Centigrade
Current GPS Coordinates The Global Positioning System (GPS) Latitude and Longitude coordinates in 0.001 resolution
RSSI The Receiver’s background noise level or RSSI (Received Signal Strength Indicator) in dBm
Queue The remaining storage space in the transmission queue in bytes (0 - 320 bytes)
Sample Counter The total number of samples taken since the D2O’s initial deployment
System data includes diagnostic information about the D2O and is key to
understanding how the unit is performing. This data is continually updated
and is usually transmitted twice a week.
2.3 SYSTEM DATA

D2O VCP Product Manual - 5
DATA DESCRIPTION
Alert Data Reports on alerts (New Battery, Tamper, Login, Memory, Other), including the time that the first alert type was
recorded, the elapsed time from first alert to most recent alert, the types of alert recorded and the total number
of alerts recorded (of any type).
Fault Data Reports on faults (Wire Fault, Temperature, Sensor, Failure, Other), including the time that the first fault type
was recorded, the elapsed time from first fault to most recent fault, the types of fault recorded and the total
number of faults recorded (of any type).
2.4 NOTIFICATIONS DATA
Notification data includes information on any alert or fault the D2O may be
experiencing. This data is only transmitted if there is an active alert or fault.

6 - D2O VCP Product Manual
3.1 ANTENNA BASICS
Before deciding on a location to install your D2O unit it is important to
understand how the D2O operates.
The D2O uses electromagnetic radio waves to communicate with the
individual satellites in a nano-satellite constellation. Transmission and
reception of these waves is facilitated by the D2O’s antennas.
The D2O knows when these orbiting satellites will be transiting through a
visible section of sky and transmits messages during this window.
The vertical orientation of the D2O’s antennas means that it has the strongest
transmission and reception abilities in a range perpendicular to the Antenna,
emanating in a radial pattern. When a satellite passes through the sky
between the horizon, and up to approximately 75° from the horizon the
D2O has the greatest opportunity for a successful transmission or reception.
Satellite passes below 20° above the horizon have a lower probability of
transmission.
Directly above the Antenna, between 75° and 90° (straight upward), the
transmission and reception abilities of the Antenna are poor.
E
F
F
E
C
T
I
V
E
T
R
A
N
S
M
I
S
S
I
O
N
R
A
N
G
E
90°
75°
60°
45°
30°
15°
0°
75°
60°
45°
30°
15°
0°
0 dBi -6 dBi -12 dBi -18 dBi
E
F
F
E
C
T
I
V
E
T
R
A
N
S
M
I
S
S
I
O
N
R
A
N
G
E
HORIZONHORIZON
SIGNAL STRENGTH+ -
Most satellite passes will occur across a partial section of sky. This is due to
the orbital pattern of the satellites and their relationship to the D2O’s position
on earth.
Having a clear line of sight to as much of the sky as possible, and in all
directions, will minimise the risk of missed transmission opportunities.
The Antenna gain pattern. The signal strength of the antenna is indicated by the dark arced sections and results in an eective transmission
window of approximately 75° from the horizon.

D2O VCP Product Manual - 7
90°
75°
60°
45°
30°
15°
0°
75°
60°
45°
30°
15°
0°
HORIZONHORIZON
O
V
E
R
H
E
A
D
P
A
S
S
T
R
A
N
S
M
I
S
S
I
O
N
W
I
N
D
O
W
O
V
E
R
H
E
A
D
P
A
S
S
T
R
A
N
S
M
I
S
S
I
O
N
W
I
N
D
O
W
L
O
W
P
A
S
S
T
R
A
N
S
M
I
S
S
I
O
N
W
I
N
D
O
W
The lighter Blue arrow shows a satellite pass that goes directly overhead, allowing for a long transmission window with a short break while
the satellite is directly overhead. The darker Grey arrow indicates a low satellite pass that only appears in the sky briefly, at a few degrees
above the horizon. The D2O will experience a mixture of these types of passes.
3.2 SITE SELECTION
A site should be selected where the D2O unit can see the most sky possible.
Where practical the D2O should always be the highest mounted object on top
of a mounting post. Avoid placing the D2O in the following locations:
• In close proximity to buildings, fences, poles, or other structures
• Under or near tall trees or dense foliage
• At the bottom of deep canyons or valleys
• Underneath or in close proximity to solar panels, weather stations, or any
other type of equipment that may share a mounting post/mast with the
D2O
• In a mounted position that is at risk of flooding/submersion
• In close proximity to sources of RF interference such as high voltage power
lines, mobile phone towers or radio towers
Placing the D2O unit in any of the above situations may restrict, or prohibit,
successful transmissions.
Ideally the D2O should have a clear view of the sky in all directions from 10°
above the horizon.

8 - D2O VCP Product Manual
D2O
90°
75°
60°
45°
30°
15°
0°
75°
60°
45°
30°
15°
0°
E
X
A
M
P
L
E
S
A
T
E
L
L
I
T
E
P
A
S
S
E
S
A poor site installation. The proximity to the building and tall trees means that several transmission angles, particularly close to the horizon,
may have failed due to an obstruction of the radio waves. The dark segments represent unobstructed transmission angles at this site and
the light segments represent the ideal transmission angles.
A POOR SITE
INSTALLATION
90°
75°
60°
45°
30°
15°
0°
75°
60°
45°
30°
15°
0°
D2O
E
X
A
M
P
L
E
S
A
T
E
L
L
I
T
E
P
A
S
S
E
S
An improved site. The distance to the building has increased and an area with lower surrounding foliage has been selected. To further
maximise transmission opportunities the D2O has been placed on a taller mast allowing for a wider view of the sky. Now the overlap of the
unobstructed angles (dark segments) has increased to cover almost all of the ideal angles (lighter segments).
AN IMPROVED SITE
INSTALLATION

D2O VCP Product Manual - 9
3.3 MINIMUM CLEARANCE
Irrespective of the mounting type or scenario, the D2O must have a minimum
clearance to the nearest object to avoid Radio Frequency (RF) interference
and adverse Antenna influence.
With the exception of the mounting device itself (post, mast etc.), there should
be no other surfaces or objects within 150mm below the base of the D2O unit
and 500mm radially from the centre of the unit as per the diagram.
150mm
500mm
M
O
U
N
T
I
N
G
S
U
R
F
A
C
E
As a first step the Antenna must be installed on the D2O unit before it will
function.
Before screwing the Antenna to the D2O locate the M5 Serrated Tooth Washer
and slip it over the Antenna Base. The Antenna is then attached by screwing
it on the exposed Antenna Base thread on the top of the D2O unit. It should
be tightened to an extra one third of a turn aer the Antenna contacts the
M5 Serrated Tooth Washer. This ensures the toothed washer suiciently
engages with the plastic of the D2O and the Stainless Steel of the Antenna to
provide an anti-rotation, locking function. Do not over-tighten the Antenna as
irreparable damage may occur.
Antenna
M5 Serrated
Tooth Washer
Antenna Base
IMPORTANT NOTE:
Extra care should be taken when handling the D2O once the
Antenna has been attached. Eye protection is recommended
to avoid accidental eye contact with the Antenna tip.
3.4 PRE-ASSEMBLY
3.5 D2O INTERFACE CABLE ATTACHMENT
The D2O is capable of being mounted in several ways. In all mounting
scenarios it is recommended that the supplied 1.5 meter 8-Pin M12 Interface
Cable is threaded through the mounting device (e.g. a post), emerging only at
the point of connection to a device or junction box. This is to decrease the risk
of damage to the 8-Pin M12 Interface Cable from sources such as:
• Bird, livestock or other animal damage or abrasion
• Falling branches or foliage
• Premature cable deterioration from ultraviolet light and weathering
• Snag risks
As such it is important to prepare the mounting device and cable before
installing the D2O.
If applicable, an appropriately sized hole should be drilled where the cable
will exit the mounting device and the cable threaded through the post and
hole prior to attaching the D2O. Ensure the hole is clean, de-burred and will
not damage the cable. Consider the use of a rubber grommet on the hole
edge to increase protection.
The 8-Pin M12 Interface Cable should then be attached and fastened to
the D2O unit via the 8-Pin M12 Connector, ready for final mounting and
commissioning.

10 - D2O VCP Product Manual
3.6 POST MOUNTING
The D2O supports direct installation to a cylindrical post. The mounting
socket on the D2O can accommodate a post with:
• Outer diameter 32mm - 34.5mm
• Internal diameter >26mm
The preferred solution for direct mounting of the D2O is the use of a Nominal
Pipe Size (NPS) steel post with a Diameter Nominal (DN) 25mm or 1 Inch,
as specified in the Australian/New Zealand standard AS/NZS1163 or the
American Standard ASTM A53M.
25mm (DN) NPS is specified as having an outside diameter of 33.4 - 34mm and
is commonly available in hardware stores and from steel suppliers, oen sold
as fence posts.
Suitably secured galvanised or stainless steel post should be used to ensure
weather resistance and durability. Providing a path for any water to drain from
within the post will reduce corrosion potential and extend the installation life.
As well as ensuring a suitable height for transmission capabilities, as per the
Site Selection section, the height of the post should also correspond to the
risk of damage or interference to the D2O. For example if used in an area with
livestock the device should be higher than the livestock could reach. If prone
to vandalism the D2O should be high enough to deter interference and may
require additional protection mechanisms.
3.7 MAST MOUNTING
Antenna mounts and masts are commonly available with a 32mm outer
diameter post making them an acceptable mounting solution.
Several antenna mast kits, including guyed options, are capable of extending
several meters into the air and may be a preferred solution to increase
transmission capabilities in areas where the D2O is surrounded by tall objects.
IMPORTANT NOTE:
If installing the D2O at a height that cannot be safely
reached once installed, such as a tall mast, ensure the D2O
is switched on and commissioned prior to mounting as these
steps require physical access to the device.

D2O VCP Product Manual - 11
3.8 SECURING
Ensure the post or mount is engaged all the way to the bottom of the D2O
mounting socket. The D2O is supplied with a Hex Head Grub Screw to fasten
the device to its mount. Use a 2.5mm Allen key or other 2.5mm Hex drive to
fasten the grub screw. The screw should only be tightened enough to stop
easy rotation or removal of the device.
IMPORTANT NOTE:
Do not over-tighten the grub screw. It is possible to
permanently damage the D2O’s plastic enclosure by over-
tightening the grub screw to the mount.
For increased mounting strength on a 34-34.5mm post, pre-drill a hole in the
post for the grub screw to pass through. The hole centre should be drilled at
14mm from the top of the mount, in the desired direction. The use of a 5.5mm
drill is recommended.
If using a post with a diameter <34mm, pre-drill an indentation/recess into the
post at the same location. In <34mm diameter pipe a complete hole will not
provide the securing force required and the D2O will have a loose fit.
D2O
Hex Head
Grub Screw
Mounting
Device
STANDARD FIXING
D2O
Hex Head
Grub Screw
Mounting
Device
14mm
5.5mm Hole
In Mount
IMPROVED FIXING

12 - D2O VCP Product Manual
4.1 INTRODUCTION
There are 2 interfaces available on the D2O VCP. The 8-Pin M12 Connector,
located centrally, is the external device(s) interface port. The 4-Pin M12
Connector is used to connect the D2O VCP to a computer via the 4-Pin M12 to
USB-A Cable during the commissioning process.
4.2 4-PIN M12 TO USB-A CABLE
To program and commission the D2O VCP via the Serial Terminal soware, a
4-Pin M12 to USB-A Cable is required. The 4-Pin M12 connector interfaces to
the matching port on the underside of the D2O VCP unit.
The D2O VCP can be connected to voltage, current or pulse counter devices
using an 8-Pin M12 Interface Cable. One end of the cable has the 8-Pin M12
Female Interface and the other has 8 ferruled capped wires to enable custom
wiring.
The pin arrangement for the female connector and the corresponding wire
colours are shown in the diagram below. Once connected to the D2O VCP,
their corresponding functions are shown in the table:
PIN 1 WHITE Digital Output (Sw. to GND)
PIN 2 BROWN 0V / GND
PIN 3 GREEN Signal GND
PIN 4 YELLOW Voltage Input - 0 to 5V or 0 to 10V
PIN 5 PURPLE Device Supply Output - 12V @ 25mA
PIN 6 PINK Current Input - 4 to 20mA
PIN 7 BLUE Pulse Input - 30uA Bias NO Contact
PIN 8 RED Not Used
1
7
65
8
2
3
4
*NOTE PIN 5 is often represented with a
Grey colour if using other IEC 61076-2-101
standard cables
FEMALE
END VIEW
4.3 8-PIN M12 INTERFACE CABLE
TO COMPUTER

D2O VCP Product Manual - 13
5.1 BEFORE STARTING
Before the D2O VCP unit can perform its normal operation it must be
programmed to establish the desired operating parameters. Without a valid
program, the D2O will not know how to communicate to the attached voltage,
current or pulse counter devices.
The D2O VCP can be programmed either prior to installation or during
the installation process. In either scenario the external device(s) must be
connected to the D2O VCP at the time of commissioning in order to correctly
setup and test the system. See the Wiring Guide section of this product
manual for more information on connecting devices and the D2O VCP
Programming section for more information on programming the D2O.
The information in this section relates to the basic operation of the D2O unit
and explains the main interfaces.
5.2 STARTING THE D2O
Using a coin or wide flat blade screw driver, rotate the Battery Switch through
45° to the ON position. The ON position is indicated by the “I” character on the
enclosure.
The translucent Battery Switch will then flash a green signal light 3 times to
indicate it is powered on. This can take up to 1 minute to occur. If the light
does not flash green please refer to the Operational Troubleshooting section.
Aer the unit is powered it will begin its start-up sequence, which includes
attempting to obtain a Global Positioning System (GPS) fix to update its
location and internal time clock.
IMPORTANT NOTE:
If operating indoors the unit may not achieve a GPS fix
and the D2O will not receive updated location and time
clock data. Other functionality can still occur but it is
recommended to obtain a GPS fix first.
5.3 SHUTTING DOWN THE D2O
Before the D2O can be shut down, ensure there is no active USB connection
via the 4-Pin M12 to USB-A cable. The D2O will remain powered by the USB
supply, even if the Battery Switch is in the OFF position.
The D2O can be shut down by rotating the Battery Switch through 45°, using
a wide flat blade screw driver or coin, to the OFF position. The OFF position is
indicated by the “O” character on the enclosure.
The unit will then be shut down. A red signal may briefly flash through the
translucent Battery Switch during this process.
No data will be collected, transmitted or received while the D2O is shut down
and the Battery Switch is in the OFF position.

14 - D2O VCP Product Manual
TO COMPUTER
5.4 CONNECTING TO A COMPUTER
Interfacing to the D2O can occur once the unit has been connected via the
4-Pin M12 to USB-A Cable, to the Computer.
Remove the protective Dust Cap from the 4-Pin M12 Connector on the
bottom of the D2O, and store safely for later replacement. Connect the 4-Pin
M12 to USB-A Cable in-between the D2O and a Computer, ensure that the
Computer’s USB Port is capable of providing at least a 500mA supply.
Once connected, follow the process outlined in the D2O VCP Programming
section of this manual to begin interfacing with the D2O VCP unit via the Serial
Terminal soware on the Computer.
The device does not have to powered to interface to a Computer, but it is
recommended.
5.5 DISCONNECTING FROM A COMPUTER
IMPORTANT NOTE:
Ensure the D2O’s Battery Switch is in the ON position before
leaving the D2O for its normal operation. No samples or
transmissions will occur if the Battery Switch is in the OFF
position.
Once all programming and commissioning processes have been completed it
is important to disconnect the 4-Pin M12 to USB-A Cable and replace the Dust
Cap to improve the environmental durability of the product and protect the
connector.
The 4-Pin M12 to USB-A Cable should be kept and stored safely for future use.

D2O VCP Product Manual - 15
Once the D2O VCP unit is powered on and programmed with the external
device(s) attached, the unit will be in its normal operating mode.
The device will begin by receiving GPS coordinates and the current time in
GMT. Once this is complete, the task scheduling will calculate when to next
sample the external device(s) and when to generate a data message to send
via the satellite link. While the D2O is waiting for a scheduled task time, it will
enter low power mode to consume as little power as possible.
When sampling the external device(s), the D2O VCP unit will enable the Device
Power Supply pin two (2) seconds before initiating the reading to the attached
external device(s). All devices defined within the program will then be
concurrently measured. Once all measurements have been returned, the D2O
VCP will record the measurement results and disable the Device Power Supply
before returning to low power mode. All external device measurement values
are buered.
5.6 NORMAL OPERATION
IMPORTANT NOTE:
Ensure the D2O’s Battery Switch is in the ON position before
leaving the D2O for its normal operation. No samples or
transmissions will occur if the Battery Switch is in the OFF
position.

16 - D2O VCP Product Manual
6.1 INTRODUCTION
Before commencing any programming or commissioning tasks the following
prerequisite tasks must be completed:
• A 4-Pin M12 to USB-A Cable must be connected between the D2O and
a USB port of the Computer, without extension. Ensure the USB Port is
capable of providing at least a 500mA supply
• It is recommended that the Power Switch of the D2O unit is set to the ON
position
• Ensure GPS satellite signals are available by moving outdoors or close to a
window (required to obtain date, time and location settings of the D2O)
• Serial Terminal soware is installed on the Computer
6.2 PRE-PROGRAMMING CHECKLIST
6.3 START-UP SEQUENCE
Before the D2O can perform its normal operation it must be programmed with
the desired operating parameters.
Programming occurs via a serial interface, using a plaintext protocol that can
be entered by either human or automated system input. A Serial Terminal
soware application (such as Tera Term), running on a Computer, is required
in order to send human entered input commands via a Command Line
Interface (CLI) to the D2O.
Once a connection is established, the CLI provides the following setup
features:
• Set device acquisition and system parameters
• Generate a Commissioning Report to confirm current settings
When setting up a D2O for the first time the steps shown in the following
sections should be sequentially followed to ensure the D2O will be correctly
setup and perform its normal operation.
Once powered the expected start-up sequence for the D2O is as follows:
• The unit will power up and within 2-5 seconds a light within the Battery
Switch should flash a green light twice
• The D2O now acquires the GPS location, time and date settings which can
take up to 90 seconds
• Next the start-up sampling configuration and system status information is
prepared for transmission at the next opportunity, before the unit enters
sleep mode
• Without further intervention the D2O will then wake at the next set sampling
time
• The unit is now ready to interface via the Serial Terminal soware