Geolux HydroCam Camera Manuel utilisateur
Copyright ©2023 Geolux d.o.o. All rights reserved.
HydroCam Camera
Camera for Remote Visual
Site Inspection
User Manual
v1.2.3
Starting Point
Thank you for purchasing the Geolux HydroCam camera for remote visual site inspection! We
have put together the experience of our engineers, the domain knowledge of our customers, the
enthusiasm of our team, and the manufacturing excellence to deliver this product to you.
You may freely rely on our eld-proven technology. The use of top-quality components and
advanced signal processing algorithms ensures that Geolux HydroCam camera can be used in
various applications and environments.
We have created this User Manual to assist you in setting up and using the Geolux instrument.
Should there be any questions left unanswered, please feel free to contact us directly:
Geolux d.o.o.
Ljudevita Gaja 62
10430 Samobor
Croatia
E-mail: [email protected]
Web: www.geolux.hr
Contents
1. Introduction 1
2. Electrical Characteristics 2
3. Connector Pin-Out 3
3.1. Serial RS-232 Interface 4
3.2. Serial RS-485 Interface 4
4. Camera Settings 5
5. Data Interface 9
5.1. Serial RS-232 Interface 9
5.2. Serial RS-485 Interface 9
6. Data Protocols 10
6.1. Servicing Protocol (RS-232) 10
6.2. Modbus Protocol (RS-485) 16
7. Communication Flow Diagram 27
8. Camera Congurator Utility 28
9. Troubleshooting 31
10. Appendix A - Mechanical Assembly 34
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Introduction
The Geolux HydroCam camera is a 5-megapixel camera specically designed for environmental
monitoring and for working with a variety of data loggers via a simple RS-232 communication
protocol or Modbus RTU protocol. The camera has a controllable zoom and focus lens, and
automatic day/night mode operation, with IR illuminators used in night mode. The camera
compresses the images using JPEG algorithm with a congurable quality parameter.
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Electrical Characteristics
The electrical characteristics of the Geolux HydroCam camera are given in Table 1.
Table 1. Electrical Characteristics
Parameter MIN TYP MAX Unit
Communication interface
RS-232 interface speed
RS-485 interface speed 1200
115200
57600
bps
bps
Power supply voltage 9.0 12.0 27.0 V
Image resolution 160x120 2592x1944
Focal length 6 22 mm
Field of view 16.3 46.4 deg.
Minimum illumination 0.1 lux
IR-cut lter 650 nm
Current consumption 75 150 mA
Operational temperature range -20 +85 °C
Mechanical 110x90x50 mm
Weight 600 g
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Table 2. Cable Pin-Out
Pin No. Wire Color Pin Name Pin Description
1 White GND This pin should be connected to the ground (neg-
ative) pole of the power supply.
2Brown +Vin The power supply for the HydroCam camera is
provided on this pin. The HydroCam camera power
supply voltage must be in the range of 9 VDC to 27
VDC, and the power supply must be able to provide
at last 0.65W
3 Green RS232 – TxD RS-232 data transmit signal.
4Yellow RS232 – RxD RS-232 data receive signal.
5Grey GND Signal ground.
6 Pink CAN – H CAN2.0B high signal. (optional)
7Blue CAN – L CAN2.0B low signal. (optional)
8Red SDI12 DATA SDI12 data line
9Orange RS485 – D- RS-485 data transmitter/receiver low signal.
10 Dark Red RS485 – D+ RS-485 data transmitter/receiver high signal.
11 Black Service RS232 - TxD Do not connect
12 Purple Service RS232 - RxD Do not connect
Connector Pin-Out
The camera uses robust IP68 circular M12 connector with 12 positions and the mating cable is
also delivered with the camera. The connector and cable details are shown in Picture 1 while Table
2 gives a detailed description of each pin.
Picture 1. HydroCam Camera Connectors
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HydroCam Camera for Remote Visual Site Inspection
3.1. Serial RS-232 Interface
Serial RS-232 interface is implemented as standard PC full-duplex serial interface with voltage
levels adequate for direct connection to PC computer or other embedded devices used for serial
RS-232 communication.
In case the RS-232 interface is connected to standard DB-9 PC connector, TxD line (green wire)
is connected to pin 2 and RxD (yellow wire) is connected to pin 3. For proper operation of the
serial interface, additional connection of signal GND (grey wire) is required on pin 5 of the DB-9
connector.
Picture 2. Serial RS232 DB-9 Cable
3.2. Serial RS-485 Interface
Serial RS-485 interface is implemented as standard industrial half-duplex communication
interface. The communication interface is internally short-circuit and overvoltage protected.
Depending on the receiving device, the interface can be used with only two wires (D+ dark red
wire & D- orange wire) while in some cases the ground connection (signal GND grey wire) is also
required. For more details please consult receiver specication.
The most common communication protocol used with RS-485 interface is Modbus-RTU, but other
protocols are also available on request. Detailed description of communication protocols is given in
chapter 6 of this user manual.
Optionally Geolux can supply a cable with DB-9 connector connected to the cable but this must be
specied as option when ordering the sensors.
Several communication protocols are available, and custom on request. Details of communication
protocols are described later in this user manual.
Geolux recommends using Waveshare USB TO RS232/485/TTL converter for connecting Geolux
instruments to computers without a native RS-232 port.
https://www.waveshare.com/catalog/product/view/id/3629/s/usb-to-rs232-485-ttl/category/37/
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Camera Settings
To change the camera settings, connect the HydroCam camera to the PC computer, and start the
Geolux Instrument Congurator PC application. Through the user interface of the application, the
following parameters can be congured.
Modbus Settings
When a Modbus setting is changed, the new communication parameters will not be used until the
HydroCam is restarted using either the software reset command or the power recycle procedure. It is
done so that several parameters can be changed in a sequence without restarting the device.
Modbus baud rate
1
0
010010 1 1 01
N bits per second
Band Rate
1 bit
Congures the baud rate (bits per second) for serial communication on RS-485 data line. This setting
controls how many bits are sent on the communication line in one second. The available values are
standardized. Using higher baud rates over longer lines may introduce errors in transferred data.
Valid communication baud rates are 1200, 2400, 4800, 9600, 14400, 19200, 38400 and 57600 bps,
while the default instrument RS-485 baud rate is 9600 bps.
Modbus ID
Congures the device (slave) ID to be used for Modbus RTU protocol. Modbus RTU uses request/
response format and allows multiple instruments to be connected on the same bus. When a remote
master transmits the request message, it will use the device ID as a device address. All instruments
will receive the request, but only the instrument with matching device ID will answer to the received
request.
ID ID+1
ID
Device ID
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Modbus parity
DATA
0
1
1
00 100X
Parily
PARITY
Parity is used in serial communication for basic error detection. When parity is set to None, no parity
is used, and no error detection is possible on bit level. When parity is set to Odd parity, an additional
bit is added to the communication that will be set to 1 when there is odd number of bits with value
1 in the 8-bit payload byte. Similarly, when parity is set to Even parity an additional bit is added
to the communication that will be set to 1 when there is even number of bits with value 1 in the
8-bit payload byte. Generally, all bytes on the receiver side where the parity bit is not matching the
message will be discarded. The default setting no parity.
Modbus Stop Bits
DATA
0
1
100 100X X
Stop bit
STOP
BITS
DATA
0
1
1
0 0 100X
Stop bit
STOP
BITS
Stop bits are added to the end of each data byte transferred over serial communication, to allow
pause between two bytes. One or two bits may be used. The default setting is one stop bit.
Camera Parameters
Resolution
Congures the camera image resolution. The resolution can be set to one of the following values:
160x120, 320x240, 640x480, 800x600, 1024x768, 1280x960, 1600x1200, 1920x1080, 2048x1536,
2592x1944. Please note that when the HydroCam camera is connected via RS-485 interface, the
resolution values are stored in two different registers. When one value is changed, the value in the
other register is automatically changed to its corresponding value.
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Quality
JPEG image relative quality in percentage from 1 to 100, where 100 is best quality and least
compression, resulting in largest image for the given resolution. Default value 75 will be shown and
used if an invalid value is found in the Flash on device startup.
JPEG maximum size
The JPEG maximum le size is a decimal number in kB which species the maximum JPEG le size
generated after a snapshot is taken. The camera will try to reduce the quality in several steps to get
the le size below the specied limit, and it will generate the minimum le possible if the goal could
not be reached. The value 0 means no limit in size is required (no quality reduction is done over the
one set in the Flash already). Other values represent maximum JPEG le size requirement in kilobytes,
but please note that it may not be possible for HydroCam to satisfy this requirement, and in this
case, it will start decreasing image quality internally, starting from the maximum possible quality,
but without changing the quality parameter stored in the Flash memory. As soon as the resulting
JPEG le is at or below the required le size, the search will terminate and the le will be generated
with the quality reached. If no requirement was met, the resulting le size will be whatever was
accomplished in the last step.
Night mode
Changes the camera mode according to the given parameter which can be either off, on or auto.
In off mode, the IR lter in the camera is always active. In on mode, the IR lter is disabled and the
camera gives a black and white image. In auto mode, the camera measures the current level of
environmental illumination and automatically selects the optimal mode for the IR lter.
IR LED mode
Changes the camera’s IR LED mode according to the given parameter which can be either off, on or
auto. In off mode, the IR LEDs are always off. In on mode, the IR LEDs are on during the night, and
off during the day. In auto mode, the IR LEDs are active only during image acquisition, autofocus or
manual zoom or focus operations.
Autofocus point
Congures the point used for the autofocus operation. The x and y coordinates are specied as a
percentage of the image size with (0,0) being at the bottom left. The values are in the 0 to 100 range.
Change of autofocus coordinates is not applied until a new autofocus request is made (the Geolux
Instrument Congurator application handles this step internally). Please note that autofocus is also
performed in the background of the zoom operation, but this autofocus does not use these autofocus
point coordinates, as focus in that case is always in the middle of the image, i.e. the autofocus point
is (50,50). Using the Geolux Instrument Congurator which is described in chapter 8 of this user
manual, the autofocus point can be set either by manually inputing the values or by selecting a point
on the image which is shown on the right side of the window when the Autofocus point setting
is selected. If a snapshot has been taken and the image has been acquired, the last image will be
shown. If no snapshot has been taken (or the camera is connected via RS-485 interface and the
image can’t be acquired after taking a snapshot), a blank canvas will be shown instead of the image.
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