CNDINGTEK DF703 User manual

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DF703 Waste Bin Sensor_LoRaWAN
User’s Manual
V1.1
Date: 2021-7-21

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Changed
V1.1 Modify DF703 device picture.
V1.0 DF703 initial version.

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INDEX
1 Overview..........................................................................................................................................4
2 DF703 Default Configuration........................................................................................................ 4
2.1 DF703 Default Configuation............................................................................................... 4
2.2 LoRaWAN Band................................................................................................................... 5
3 DF703 Sensor Function Description.............................................................................................5
3.1 Reporting rules.................................................................................................................... 5
3.2 Full /Empty state detection (height detection)................................................................5
3.3 Fire alarm function..............................................................................................................6
3.4 Fall detection function........................................................................................................ 7
3.5 GPS function.........................................................................................................................7
4 DF703 Hardware interface............................................................................................................ 8
5 Connect to Power............................................................................................................................9
6 Reboot Sensor by Magnet............................................................................................................ 10
7 Installation.................................................................................................................................... 10
7.1 DF703 Sensor housing installation..................................................................................10
7.2 DF703 Sensor Installation................................................................................................ 11

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1 Overview
These documents are helpful to understand the DF703 Waste Bin Detector's following:
▪DF703 sensor parameter setting by default
▪DF703 sensor function description
▪Hardware Interface
▪Connect power
▪Reboot DF703 sensor by magnet
▪Installation
▪Protocol and API
2 DF703 Default Configuration
2.1 DF703 Default Configuation
Parameters
Default
Configuration
Description
Periodic
upload time
24 hours
Sensor will report at the 24 hour interval, and report
the reading of the moment.
Periodic
detection time
10min
Sensor detects once every 10 minutes, but will only
send right away if there’s a change of status, if no
change of status, it will report at the 24 hour interval.
Full alarm
threshold
30cm
Used to determine if sensor is full. When theheight is
more than 30cm, the sensor is considered to be full;
Fire alarm
threshold
75℃
Used to determine if sensor is fire. When the
temperature is more than 75℃, the sensor is
considered to be fire;
Fall alarm
threshold
30°
Used to determine if sensor is fall. When the angle of
the sensor titled is more than 30°, the sensor is
considered to be fall;
Battery alarm
threshold
20%
Used to determine if the battery is lower. When the
percentage of the battery is less than 20%, the battery
is considered to be battery lower;
GPS function
Turned off by
default
It is turned off by default;
Note: standardversion without GPS function;
Fall function
Turned off by
default
It is turned off by default;

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2.2 LoRaWAN Band
The main LoRaWAN band are used given below CN470, EU868, US915, AU915,
AS923. The default frequency settings are as follows:
3 DF703 Sensor Function Description
3.1 Reporting rules
The DF703device will report data in the following two cases,
1) Periodic upload time: report the reading of the moment at the periodic report
interval.
2) Trigger reporting: The device will detect all states, such as full/empty, fire, fall,
battery status, etc., During the periodic detection interval. If there is a status changed, it
will report the data. If there is no status changed, it will only report it at the periodic
upload interval. data. Status changed means the status change from full to empty or from
empty to full and so on.
3.2 Full /Empty state detection (height detection)
This sensor can detect the air height from the probe (white part) of the device to the
surface of the garbage/other object. According to this distance, it can be judged whether
the trash bin is empty or full.
Band
The default uplink
frequency
RXWIN1
RXWIN2
CN470
(470-510MHz)
470.3,470.5,470.7,470.9,
471.1,471.3,471.5,471.7
500.3,500.5,500.7,500.9
501.1,501.3,501.5,501.7
505.3
EU868
(863-870MHz)
868.1,868.3,868.5
868.1,868.3,868.5
869.525
US915
(902-928MHz)
902.3,902.5,902.7,902.9,
903.1,903.3,903.5,903.7
923.3,923.9,924.5,925.1
925.7,926.3,926.9,927.5
923.3
AU915
(915-928MHz)
915.2,915.4,915.6,915.8
916.0,916.2,916.4,916.6
923.3,923.9,924.5,925.1
925.7,926.3,926.9,927.5
923.3
AS923
(915-928MHz)
923.2,923.4
923.2,923.4
923.2

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By default (the alarm threshold is 30cm), when the device measure that the height is
less than 30cm, the garbage bin is considered to be full. When the distance is greater
than 30cm, the trash can is considered empty.
Figure 3.1 DF703 Height detection
Cardboard items can be used for simulation testing before actual installation.
Figure 3.2, test height with one cardboard or face ground;
Figure 3.3, test height with one cardboard or face ceiling without led;
Note: The test process ensures that the device is vertical to the object being measured,
so that more accurate height data can be obtained.
3.3 Fire alarm function
The sensor can detect the temperature value to determine whether or not to catch fire.
The default alarm threshold is 75 °C. When the temperature is detected to be greater
than 75 °C, sensor will report this data.
If you need to verify this feature, it is recommended to change the alarm threshold. In
order to avoid improper damage to the equipment. Suggested method:
1) Modify the alarm threshold to a temperature lower than room temperature, so the
device device can be triggered to report alarm data. The method of modifying this
parameter can be modified through the serial port or sent by the platform.

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3.4 Fall detection function
Step 1: After fixing the device on the trash can, please restart the device. After the
restart, the current position will be learned. The position is considered to be the
standard position of the trash can, the angle is 0°, and it is not fall.
Step 2: When the trash bin is tilted and cut at an angle greater than 30°, the device will
report the alarm data, indicating that the trash can has been inverted;
Step 3: Restoring the trash bin to the standard position. When the device is awakened to
detect that the device has returned to the standard position, or the tilt and angle are less
than 30°, the data will be reported, indicating that the trash can is not dumped;
.......
3.5 GPS function
The following content is only applicable to GPS-capable devices. The standard
version does not have GPS. You can ignore this part.
Positioning interval:Positioning at upload interval.
Working environment: Open outdoor environment, no obstructions around the device,
that is, the GPS antenna is facing up and is not blocked;
Installation: The sensor is installed outside the trash can, and the antenna is not
covered by the trash can cover. In addition, if use the external GPS antenna, the device
can be installed inside and the antenna is placed outside the trash bin.
Testing method:
1. Place the sensor in an outdoor open environment, restart the device with a magnet,
and wait for about 5 minutes to view the data.
Note: The sensor will locate once every time it restarts.
2. Through the platform (our company's background management) location
information.

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Figure 3.2 DF703 latitude and longitude information
Note:
(1) Why can't get the location information?
Keep the device completely open, restart the device with a magnet, check the data
results multiple times, or view the positioning information directly through the serial
port.
GPS positioning is easily affected by location and weather. If a location cannot be
determined at a certain moment, please try multiple times; avoid testing in corners such
as windows and corners.
(2) When the GPS function is not needed in actual applications, please turn off the GPS
function to avoid unnecessary power consumption.
(3) If you test indoors for a long time, you can turn off the GPS function. Since GPS does
not work indoors, turning on GPS will only consume power.
(4) GPS positioning time is up to 4 minutes.
4 DF703 Hardware interface
The detailed of power interface , device parameter configuration interface are given
here, as shown in figure 4.1.
●Power socket: Connect to the battery,and capacitor.
●UART interface:This interface is used to configure device parameters.

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Figure4.1
5 Connect to Power
Please first connect the battery, as following picture:
Note:
1 If you connect the power, but not reporting, please try to restart sensor by magnet.
2 If you need to restart sensor, please use magnet. DONOT unplug/plug battery
frequently.
Power socket
UART interface
Connect battery to
power socket

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6 Reboot Sensor by Magnet
Magnet:
Move the magnet around the probe side, then remove the magnet. If the device is
successfully rebooted, the device will report a data.
7 Installation
7.1 DF703 Sensor housing installation
When installing the upper and lower shells of the device, please pay attention to the
following:
1. Before installation, please check that the battery foam and gaskets are intact and
placed correctly; make sure that there are no internal cables, such as power cords, stuck,
otherwise it will easily cause gaps after installation, easy water leakage, and even failure
to work properly.
2. Before fixing the screws, check whether the edge of the housing is squeezed by the
antenna cable, power cord, etc., to avoid breaking the cable and causing the device to fail
to work normally;
3. After installation, the gap between the upper and lower covers is less than 0.2mm,
which has achieved the purpose of waterproofing.

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Figure 7.1
7.2 DF703 Sensor Installation
First install the DF703 device to the bracket, as shown in the figure below,
Drill holes on the top of the trash can according to the hole position of the mounting
bracket, and fix the device on the top of the trash bin.
Note:
1. Place the DF703 device in the center of the top cover of the trash bin and make
the device vertically downward. If the device is tilted or too close to the side of the trash
bin, it will affect the accuracy of distance detection.
2. If the top cover of the trash bin is curved, spacers can be added to adjust the
height, and finally the DF703 device will be perpendicular to the bottom of the trash bin.
3. After installation, you can restart the device again and check whether the data is
normal on the platform.
4. If you use the fall detection function, after installation, you must use a magnet to
restart the device to initialize its position.
battery foam

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