Aqua-Scope AQSLWE02 Operating manual

Aqua-Scope Monitor
SKU: AQSLWE02
Version: 2.0.0
Product Description
The Aqua-Scope water monitor detects water leaks and records the total water consumption in the
house as well as the pressure and temperature of the water. The device applies advanced signal
processing and analyzes the sound waves, which move in the domestic water distribution pipes when
water is taken or there are leaks. Water is a very good conductor of sound. A single sensor is
therefore sufficient, to monitor the whole house or apartment. In addition, to the sensor other
peripheral devices such as valve motors or flood sensors can be associated to extend the functionality of
the overall system.
The device consists of two parts:
Main housing for signal processing and radio communication with battery compartment.
The external sensor head is connected to the water pipe. The stainless steel sensor head has a
silicon sensor mounted in silicone oil for highly accurate and low-noise pressure measurements in
a wide operating range. The measuring range for pressure is between 1 and 10 bar. The sensor
values are converted into digital values directly in the measuring head to suppress interference
from the connection to the main housing. In addition, the temperature of the liquid medium is
measured directly at the stainless steel diaphragm and is therefore very precise.
The sensor can send an alarm message if freely definable threshold values are exceeded or not reached.
The sensor's polling frequency can be set between 0.1 second and several minutes and defines the
battery life. For a measuring interval of 1 second, a battery life of approx. 10 years is calculated.
The device communicates via LoRaWAN as a Class A device and can also be operated as a Class C
device via configuration parameters.
The device is powered either via an external power supply with USB-C power supply unit or via an
optional internal ER26500 battery (Bobbin Cell C).
Both the sensor head (IP67) and the main housing (IP65) are waterproof and can be used outdoors or in
particularly humid and/or dirty environments.
Users and Installation Manual: Aqua-Scope Monitor (AQSLWE02)
Copyright © 2023 Aqua-Scope Technologies, Sakala tn 7-2, 10141 Tallinn, Estonia, www.aqua-scope.com

Installation
The Aqua-Scope sensor head must be connected to a single point
in the house's piping system. Ideal connection points are angle
valves located under sinks or next to toilets. Other options
include 1/4-inch access openings at the pressure reducer, shut-
off valves, or other installation devices. It is recommended to
choose the lowest possible point in the apartment (ideally in the
basement or on the first floor).
Attention! If a pressure reducing valve (PRV) is installed, the Aqua-Scope monitoring device must be
installed between the pressure reducer and the individual outlets. If no PRV is present, the device can be
installed anywhere, but the accuracy of the measurements will be lower. Details can be found in the
section "Impact of Pressure Reducer."
To keep it short and simple, the video at aqua-scope.com/install explains the installation of the Aqua-
Scope water monitor step by step:
1. If two angle valves are present under the sink, please
identify the cold water supply. Simply open hot water and
check which valve warms up.
2. Close the tap and shut off the angle valve by turning
clockwise.
3. Remove the metal hose from the angle valve with the
provided 19mm wrench. Have a towel ready to catch the
water coming out of the end of the hose.
4. Attach the T-shaped connector to the top of the angle
valve and secure it with the 19mm wrench.
5. Connect the metal hose to the top of the connector and
secure it with the 19mm wrench.
6. Screw the Aqua-Scope pressure sensor head into the side
opening of the connector and secure it by hand. It is not necessary to tighten it too much.
7. Open the angle valve again by turning the knob counterclockwise.
8. Check all three connections for leaks for a few seconds.
9. Attach the Aqua-Scope to a suitable location with double-sided tape and connect the sensor head
to the main device. Insert the flood sensor into the audio jack if necessary.
10. Turn on the device using the USB-C power plug. Please use the included power supply. This power
supply has a very low harmonic distortion, which is necessary for precise measurements.
Alternatively, insert a battery.
Connection to LoRaWAN Network
This device, with its three keys (Dev EUI, Join EUI, Join Key), needs to be registered with a LoRaWAN
network operator that covers the device's location with radio signals.
If you purchased the device directly from Aqua-Scope's online shop, use the email address used for the
Users and Installation Manual: Aqua-Scope Monitor (AQSLWE02)
Copyright © 2023 Aqua-Scope Technologies, Sakala tn 7-2, 10141 Tallinn, Estonia, www.aqua-scope.com

purchase and the public device key (Dev EUI) on the website https://aqua-scope.com/lora. You will
receive a message with all three keys to the provided email address. The public key is also printed on
the device as a 16-digit number and as a QR code for scanning. The QR code and 16-digit number are
also printed on the outer packaging.
If you purchased the device from a dealer, the dealer will provide the three keys. If they do not, please
contact [email protected] by email.
Immediately upon inserting the batteries or connecting a power supply, the device will attempt to
connect to the LoRaWAN network using the three keys you provided. The LEDs will blink during this
process. After approximately 25 seconds, this process, called 'JOIN,' will either be successful or aborted.
In the latter case, the device immediately enters sleep mode.
If, for any reason, the sensor loses connection to the server, an automatic reconnection process, called
'Rejoin,' will take place. This process repeats whenever the device attempts to send a message to the
LoRaWAN network.
Pressing the button always initiates a LoRaWAN communication, leading to a 'Rejoin' as explained above.
Please observe the Duty Cycle regulation—sending messages or Rejoins too quickly in succession may
be ignored by the LoRaWAN network.
Device Operation
Remote Access
The device is accessible via LoRaWAN commands. lease consult your LoRaWAN provider for details how
to access the data. Please refer to the sections below for information on the payload and the payload
decoding.
Measurement Values and Alarms
The device measures the pressure and temperature of the water in the pipe where the sensor is
installed multiple times per second.
Additionally, the sensor analyzes all acoustic waves occurring in the water. Since water is an
excellent transmitter of acoustic waves, a single sensor is sufficient to capture all acoustic events in the
house from a main water meter, pressure reducer, or pressure booster. These three devices block the
transmission of sound waves in the water pipe. By analyzing the sound waves, the sensor distinguishes
Users and Installation Manual: Aqua-Scope Monitor (AQSLWE02)
Copyright © 2023 Aqua-Scope Technologies, Sakala tn 7-2, 10141 Tallinn, Estonia, www.aqua-scope.com

between normal water consumption and various anomalies, each reported as an alarm to the user.
The following alarms are possible:
1. One of the wired or wireless flood sensors has detected water. This is typically triggered by a leak
near the respective sensor.
2. The water pressure has risen above the threshold set in the app or through configuration
parameter 6. The reason for this alarm could be malfunctions of a pressure reducer or backflow
preventer to the hot water system.
3. The water pressure has fallen below the threshold set in the app or through configuration
parameter 7. The reason for this could be a pipe break; however, the water may have simply been
turned off.
4. The external sensor is not connected to the main device.
5. The external sensor is connected to the main device but not connected to a pressurized water line.
6. The water temperature has either fallen below the value set in the app or configuration parameter
11 or risen above the value in the app or configuration parameter 16.
7. The Pipe-Check has detected a microleak. There is a separate chapter in this manual for 'Pipe-
Check'.
8. The duration of water draw has exceeded the value set in the app or configuration parameter 10.
This may indicate a leak or be triggered, for example, by filling a swimming pool.
9. A clogged toilet has been detected.
10. Water is beginning to flow, likely caused by a leak due to specific acoustics.
The alarm is transmitted to the app and forwarded there via push notification and (configurable in the
app) as an email or voice message. If the condition that triggered the alarm has been resolved, the
alarm will be automatically cleared. It is also possible to clear the alarm by double-clicking on the
monitor's button, even if the alarm condition has not been resolved. The alarm will then remain locked
until the next power-on.
Sensor Data
The sensor measures water pressure, water consumption, and water temperature, and sends the values
every 15 minutes, along with operating time, battery consumption, and battery voltage, via LoRaWAN.
Calibration
To correctly evaluate acoustic signals in the water, the sensor must be calibrated. This happens
automatically after the device is connected to the radio. The calibration process takes about 24 hours.
During this time, water withdrawals may already be displayed, but they may still be roughly incorrect.
Incorrect displays will occur, especially if the normal water pressure fluctuates significantly during the
calibration period. This can happen if the target pressure of the pressure reducer is changed during this
time or if the device is first tried on the table before being connected to the water line for final
installation.
In this case, and also otherwise if needed, the calibration can be repeated. Please refer to the section
LoRa Commands below for details on the command needed.
Users and Installation Manual: Aqua-Scope Monitor (AQSLWE02)
Copyright © 2023 Aqua-Scope Technologies, Sakala tn 7-2, 10141 Tallinn, Estonia, www.aqua-scope.com

Effect of a Pressure Reducer
An installed pressure reducer (PRV) is common in modern European house water installations. Without a
pressure reducer, the Aqua-Scope monitor is still usable, but some functions are restricted:
No Restriction: Pressure monitor, temperature monitor, flood alarm, frost alarm, overpressure
alarm, microleak test (Pipe-Check)
Less Precise: Consumption alarm, water consumption measurement, clogged toilet
Pipe-Check
The detection of micro-leaks in the pipe system requires a special measurement method called 'Pipe-
Check.' This process takes about 240 seconds, and during this time, the water system must be in a "rest"
state, meaning no water withdrawal should occur. The 'Pipe-Check' should ideally take place at night as
events like water withdrawal or water heating can disrupt the process without issues.
During the 'Pipe-Check,' water must be shut off. Therefore, it is recommended to install a retrofit motor
that performs this task automatically at night. The time and days of the test can be set in the app as a
timer (Configuration -> Timer) with 'Pipe-Check' as the action. If no retrofit motor is connected to the
monitor, water can still be manually turned off, and the 'Pipe-Check' can be started manually in the app.
If the Pipe-Check indicates a micro-leak, there is no need to panic. In most cases, it will be a dripping
faucet. If the result of a Pipe-Check shows a micro-leak over several days, it's time to investigate the
cause. The alarm message provides further hints on where the leak may be located.
LED Indicator
The device features a tricolor LED (red/green/yellow) to signal different operational states. The LEDs only
remain continuously lit when powered by an external source. In battery mode, the LEDs remain off after
the startup sequence to conserve power.
Yellow glowing or blinking in a sequence: Device is booting up
Red/green blinking: The device is in the factory state or searching for a LoRaWAN network.
Slowly breathing blue: Device is connected to the internet and in standby mode (only in external
power mode).
Flashing red: Alarm is active. The cause of the alarm was sent by LoRaWAN.
Button Operation
By pressing the button once, twice, or three times in quick succession, the following functions can be
activated:
Once: In battery mode, the device is awakened, the green LED lights up, and additional commands
can be entered.
In the wake-up state (external power, awakened from battery mode), pressing the button
once sends a status message via WLAN.
Users and Installation Manual: Aqua-Scope Monitor (AQSLWE02)
Copyright © 2023 Aqua-Scope Technologies, Sakala tn 7-2, 10141 Tallinn, Estonia, www.aqua-scope.com

Twice: Existing alarms (LED blinking red) are cleared.
Three times: Currently not assigned.
Note: In battery mode, the button must be held down for about 1 second (until the green LEDs light up)
to wake up the device. Afterward, the second and third clicks can be performed as needed.
Battery Operation
The sensor can be operated with an external power supply, a battery, or both simultaneously. The status
at the moment of powering on defines the device's operating mode. If mains voltage is present at the
moment of powering on, the device will remain in power mode until the next status report (default every
15 minutes), even if mains voltage fails and a battery is inserted. The battery then operates as a backup.
If the sensor is started by inserting a battery, it will switch to battery mode. This means that some sensor
functions are shut down to save power:
The status LED remains dark.
A local alarm is neither indicated acoustically nor by a red LED.
The device responds only slowly to incoming commands (on average, about 10 seconds in power
mode, up to one hour in battery mode).
The device can no longer receive alarms from external wireless flood sensors.
The sensor data is sent only hourly instead of every 15 minutes.
If the device has LoRaWAN communication capability, it will attempt to join the LoRaWAN network
only once (JOIN).
An estimate of battery life can be found in the app under "Devices". With a pressure reducer, the battery
lasts about 8 to 10 years, without a pressure reducer in the water pipe, the lifespan is about 4 years.
LoRaWAN Payload Commands (Payload Format)
LoRaWAN commands can be daisy chained into the payload up to the defined maximum payload size of
51 bytes. This mean that for all commands sent to defined number of bytes in the payload is required to
avoid misinterpretation of command and/or command values in the receiver side. All uplink and
downlink commands use FPort=10.
Uplink Command Hardware Version Report: 0x03 - HW - CAP_MSB CAP_LSB (4 Byte): This
command reports the hardware version and a bitmap of the capabilities of the device. It is sent
unsolicited as the first command during boot-up and as replying command to downlink command
Hardware Version Get. HW is a single byte indicating the version of the hardware. The bitmap
indicates the different capabilities of the device.
Uplink Command Configuration Report: 0x04 - IDX - VAL_MSB - VAL_LSB (4 Byte): This
command reports a configuration parameter of the device: IDX is the number of the configuration
parameter. The 16 Bit VAL is the parameter itself. Configuration parameters are always 16 Bit
values. The table below describes the configuration parameters and their values.
Uplink Command Sensor Report: 0x06 - ID - VAL_MSB - VAL_LSB (4 Byte): This command
reports sensor values. The ID indicates the sensor type and defines the format of the 16-Bit VAL.
The sensor types of this devices are listed below.
Users and Installation Manual: Aqua-Scope Monitor (AQSLWE02)
Copyright © 2023 Aqua-Scope Technologies, Sakala tn 7-2, 10141 Tallinn, Estonia, www.aqua-scope.com

Uplink Command Device Status Report: 0x07 - STATE - VAL1_MSB - VAL1_LSB -
VAL2_MSB - VAL2_LSB (6 Byte): This command reports every single water flow event and the
result of a Pipe-Check. STATE contains the status of the operation and defines the meaning of the
two 16-bit values.
0x00 Idle, YY/ZZ == 0x00
0x01 Water Flow Ongoing, YY/ZZ == 0x00
0x02 Pipe-Check - ok, YY/ZZ == 0x00
0x03 Pipe-Check - alarm, YY = pressure diff/mbar, ZZ = elevation/cm
0x04 Pipe-Check - aborted due to normal water take, YY/ZZ == 0x00
0x05 Pipe-Check - aborted due to water heats up, YY/ZZ == 0x00
0x06 Pipe-Check - aborted due to blocking valve, YY/ZZ == 0x00
0x07 Pipe-Check - not started, water currently flowing, YY/ZZ == 0x00
0x08 Pipe-Check - has started, YY/ZZ == 0x00
0x09 Valve Closed, YY/ZZ == 0x00
0x0e Water Flow Stop Event, YY flow time/sec, ZZ consumption in ml
0x0f Water Flow Start Event, YY/ZZ == 0x00
Uplink Command Firmware Version Report: 0x0a - VER_MSB VER_2 VER_3 VER LSB (5
Byte): This command reports the 32-bit value of the current firmware. It is sent unsolicited as the
first command during boot-up and as replying command to downlink command 'Hardware Version
Get'.
Uplink Command Alarm Report: 0x0b - STATE - TYPE - VAL_MSB - VAL_LSB (5 Byte): This
command reports start and end of alarms. The STATE-Byte indicates the status of the alarm (0x01
= active, 0x00 = inactive). The TYPE Byte indicates the type of alarm and defines the content of
the 16 Bit VAL. Possible alarm IDs and the values reported are listed below.
Uplink Command Battery Report: 0x12 - VOLT - BAT_MSB - BAT_LSB (4 Byte): This
command reports the status of the battery. VOLT is the measured voltage of the battery in 100 mV
steps, the BAT value is the consumption of the current battery - as counted inside the system - in
mAh.
Downlink Command System Command: 0x01 - CMD (2 Byte): This command sends a system
command to the devices. CMD defines the type of command:
CMD = 0x01: System restart
CMD = 0x02: System Reset - back to factory default
Downlink Command Hardware Version Get: 0x03 - (1 Byte): This command calls for a
Hardware Version Report sent upstream
Downlink Command Configuration Set: 0x04 - IDX - VAL_MSB - VAL_LSB (4 Byte): This
command allows setting configuration parameters of the device: IDX is the number of the
configuration parameter. The 16 Bit VAL is the parameter itself. Configuration parameters are
always 16 Bit Values. The table below describes the configuration parameters and its values.
Downlink Command Sensor Get: 0x06 - ID (2 Byte): This command requests the report of
sensor values. The ID indicates the sensor type. The sensor types of the devices are listed below.
Downlink Command Alarm Clear: 0x0b - TYPE (2 Byte): This command clears an alarm. TYPE
is the type of alarm to be cleared. Type = 0 clears all active alarms. For other types of alarms to
be cleared please refer to the uplink command 0x0b.
Downlink Command Configuration Get: 0x14 - IDX (2 Byte): This command allows reading
Users and Installation Manual: Aqua-Scope Monitor (AQSLWE02)
Copyright © 2023 Aqua-Scope Technologies, Sakala tn 7-2, 10141 Tallinn, Estonia, www.aqua-scope.com

the configuration value IDX. The device will respond with an upstream command Configuration
Report
LoRaWAN Sensor Types
The following sensor types are supported by the Aqua-Scope Monitor.
0x01: Temperature: VAL is temperature in 1/10 Degree Celsius, (2-complement). Example: 0x06
0x01 0x00 0xCD => Temperature 0x00CD = 205 = 20.5 C., 0x06 0x01 0xFF 0xEA =>
Temperature 0xFFEA = -20 = -2 C
0x03: Uptime: VAL is the number of hours after last boot
0x10: Water Pressure: VAL is unsigned water pressure in mBar. Example: 0x10 0x011 0x0D 0x48
=> Pressure 0x0D48 = 3400 = 3.4 Bar.
0x11: Water Consumption: VAL is water consumption in liters since last report
LoRaWAN Alarm Types
The following alarmtypes are supported by the Aqua-Scope Monitor.
1 (0x01): Flood Sensor Tripped. VAL is 0x01 or 0x00.
2 (0x02): Freeze/Frost Danger. VAL is actual temperature.
3 (0x03): Too Long Water Flow. VAL is the time in s.
4 (0x04): Heavy Flow - Pipe Break ? VAL is actual water pressure.
5 (0x05): Jamming Toilet Flap. VAL is 0x00.
6 (0x06): Water Overpressure. VAL is actual water pressure.
7 (0x07): Tripping Alarm. VAL is actual water pressure.
10 (0x0a): Strange Flow Alarm. VAL is actual water pressure.
12 (0x0c): Battery Low. VAL is 0x01 or 0x00.
13 (0x0d): Lost Mains Power. VAL is 0x01 or 0x00.
14 (0x0e): Sensor Head not connected to main device. VAL is 0x01 or 0x00.
15 (0x0f): Sensor Head not in contact with water. VAL is 0x01 or 0x00.
LoRaWAN Special Commands
The Command 0x01 0x03 (2 Byte) starts the Pipe-Check process.
LoRaWAN Configuration Parameters
All Configuration Parameters are 2 Byte values that can be set and read out using LoRaWAN
'Configuration Get' and 'Configuration Set' commands. Here is an overview of the configuration
parameters currently used:
Parameter 1 (0x01): System Register (Default: 0x5bfe = dec 23550)
The bitmap defines the general behavior of the device. Bit = 1 means function enabled, bit = 0 means
function disabled.
0x0001 (Bit 00) : Main Processor in Sleep Mode
Users and Installation Manual: Aqua-Scope Monitor (AQSLWE02)
Copyright © 2023 Aqua-Scope Technologies, Sakala tn 7-2, 10141 Tallinn, Estonia, www.aqua-scope.com

0x0002 (Bit 01) : LORAWAN communication
0x0004 (Bit 02) : Wifi communication
0x0008 (Bit 03) : Serial communication
0x0020 (Bit 05) : Buzzer active
0x0040 (Bit 06) : LED active
0x0400 (Bit 10) : n.n.
0x0800 (Bit 11) : high frequency (1) versus low frequency(0)
0x1000 (Bit 12) : base operation interval msb
0x2000 (Bit 13) : base operation interval
0x4000 (Bit 14) : base operation interval
0x8000 (Bit 15) : base operation interval lsb
When High-Frequency Bit set to 1: 4 MSB defines interval in 2 * ms from 2 -32 ms (val 1 - 16).
When High-Frequency Bit set to 0: 4 MSB defines interval as 125 ms power of x, ranging from x = 1 =
125 ms to x = 14 = 2048 sec = 34 min , x=15 is not allowed.
Parameter 3 (0x03): LoRa Register (Default: 0x0ffd = dec 4093)
The bitmap defines which commands are accepted on the LORAWAN communication channel. Please
note that disabling bit 4 will essentially lock this function against further changes from the LORAWAN
channel. Changes via Wifi are still possible. Bit = 1 means function enabled, bit = 0 disables function
0x0001 (Bit 00) : CLASS C (default = Class A)
0x0002 (Bit 01) : Alarm Reporting
0x0004 (Bit 02) : Alarm Clearing
0x0008 (Bit 03) : Heartbeat Reporting
0x0010 (Bit 04) : Config Parameter Changes
0x0080 (Bit 07) : Water Consumption Report
0x0100 (Bit 08) : Temperature Report
0x0400 (Bit 10) : Pipe-Check
0x0800 (Bit 11) : Pressure
0x1000 (Bit 12) : Periodic Config Parameter Reporting
0x2000 (Bit 13) : n.n.
0x4000 (Bit 14) : Frequency msb, 0x00 = EU, 0x01 = US, 0x02 = nn., 0x03 = nn.
0x8000 (Bit 15) : Frequency lsb
Parameter 5 (0x05): Water Standard Pressure (Default: 0x0dac = dec 3500)
This parameter is for information only. The pressure value is automatically set at initial calibration and
may change from time to time as a result of ongoing calibration. The value is provided in mBar.
Parameter 6 (0x06): Over-Pressure Alarmthreshold (Default: 0x1f40 = dec 8000)
An overpressure alarm is sent as an uplink message when the current pressure exceeds this threshold.
The threshold value is automatically set 24 hours after initial setup during calibration and may change
from time to time as a result of ongoing calibration. The value is accepted in mBar.
Users and Installation Manual: Aqua-Scope Monitor (AQSLWE02)
Copyright © 2023 Aqua-Scope Technologies, Sakala tn 7-2, 10141 Tallinn, Estonia, www.aqua-scope.com

Parameter 7 (0x07): Under-Pressure Alarm threshold (Default: 0x07d0 = dec 2000)
A heavy flow alarm is sent as an uplink message when the current pressure falls below this threshold for
a certain time. The threshold value is automatically set 24 hours after initial setup during calibration and
may change from time to time as a result of ongoing calibration. The value is accepted in mBar.
Parameter 9 (0x09): Jamming Toilet (Default: 0x00c8 = dec 200)
This parameter defines the max time in seconds for 10 consecutive small water consumption event
typical for jamming toilet flap. The default value of 200 means that the 11th event with a given 200
seconds time interval will cause a jamming alarm sent as uplink message. If your home has heavy water
usage in general you may want to increase this value to avoid false alarms but keep in mind that the
system will be less sensitive to find possible malfunctions.
Parameter 10 (0x0a): Max. Water Take Time (Default: 0x0384 = dec 900)
A Water Flow longer then this value (in seconds) will cause a Usage Alarm.
Parameter 11 (0x0b): Frost Warn Threshold (Default: 0x0028 = dec 40)
A frost alarm is sent as uplink message when the current temperature falls below the threshold. The
threshold value is accepted in 1/10 degree Celsius. The default value is set to 4 degree Celsius.
Parameter 13 (0x0d): Pipe-Check Duration (Default: 0x0258 = dec 600)
This value defines how long (in seconds) a pipe check process shall take.
Parameter 14 (0x0e): Pipe-Check Abort Drop (Default: 0x00c8 = dec 200)
This value defines the maximum sudden loss in pressure during Pipe-Check to indicate water
consumption. When hit, the Pipe-Check is aborted immediately and the valve is reopened. The value is
provided in mBar.
Parameter 15 (0x0f): Pipe-Check Alarm Drop (Default: 0x001e = dec 30)
This value defines the maximum loss in pressure per minute during Pipe-Check in mBar. When hit, the
Pipe-Check will continue for several more minutes to determine the elevation and the orifice size of the
detected leak.
Parameter 19 (0x13): Alarm Enable/Disable (Default: 0xd806 = dec 55302)
The bitmap defines which alarm type is active and will cause an alarm status command 0x0b. Bit = 1
means function enabled, bit = 0 disables the function. The different alarm types are shown in the section
'LoRaWAN Alarm Types'.
Parameter 29 (0x1d): Reporting Interval (Default: 0x0384 = dec 900)
This parameter defines the interval in seconds the device automatically reports sensor values and
heartbeat as an uplink message.
Users and Installation Manual: Aqua-Scope Monitor (AQSLWE02)
Copyright © 2023 Aqua-Scope Technologies, Sakala tn 7-2, 10141 Tallinn, Estonia, www.aqua-scope.com