Shenzhen Fine Offset Electronics WN51E Soil Moisture Sensor User Manual
- June 5, 2024
- Shenzhen Fine Offset Electronics
Table of Contents
Fine Offset Electronics WN51E Soil Moisture Sensor
User Manual
Introduction
Thanks for purchasing this WN51E soil moisture sensor. This device measures
soil moisture. The data can be streamed by GW1000 Wi-Fi Gateway (sold
separately) and can be viewed on our WS View mobile application after the Wi-
Fi configuration is done. Or a receiver console can be used to display the
received sensor value.
The sensor is equipped with a ceramic cap which acts as a breathing filter for
exchanging soil moisture to its internal sensing media. This filter has the
soil type isolated so that sensor is not sensitive to the type of soil( clay,
sand, fertilization condition, etc.).
To ensure the best product performance, please read this manual and retain it
for future reference.
Getting Started
2.1 Parts List
One Soil Moisture Sensor
One User Manual
Overview
- LED Indicator (RF transmission)
- Battery Cap
- Soil Moisture Sensor cap
3.1 Features
Soil Moisture Sensor
- Measures soil moisture content every 71 seconds.
- Sensors are covered with ceramics for more accurate measurement.
- Custom Mode: with 0%AD and 100%AD custom mode to manually calibrate the low/high moisture value so that you can get more accurate results for different soil types. This mode can only be activated through WS View app and in live data display mode.
- Long wireless range, up to 300 feet (100 meters) in open areas
When paired with a GW1000 Wi-Fi Gateway:
- Monitor live sensor data on the Life Data page of the WS View app (requires the gateway and your phone is using the same Wi-Fi network)
- Up to 8 channels are supported. Channel names can be edited on the app.
When paired with a Weather Station Console (HP2551/HP3500/HP3501):
- View soil moisture data in real-time on the Display
- Up to 8 channels are supported. Channel names can be edited on the Display (for HP2551 only).
When uploaded to Ecowitt Weather Server:
- View current soil moisture data & history records & graphs on the website
- Set and receive email alerts from the server
- Channel names can be edited on the website
- Remote monitoring with a smartphone, laptop, or computer by visiting the website
Note: The WH51 and WN51E will be recognized as the same sensor type by the software. If you purchased both, they will share the eight channels together and the total quantity of the two sensors could not exceed eight.
Setup Guide
4.1 Install batteries
- Open the battery cap of the soil moisture sensor
- Insert one AA battery and close the battery door.
- After inserting the battery, the remote sensor LED indicator will light for 4 seconds, and then flash once per 71 seconds thereafter. Each time it flashes, the sensor is transmitting data. You may go to Section 5 now to complete the GW1000 gateway configuration first to make its data displayed and resume the steps followed below.
- Before installing the sensor into its permanent location, we would suggest testing the sensor in the air and seeing if moisture reading is 0. And then put the sensor into a cup of water, the sensor should have its reading increased to 90% or above. Once the sensor detected a significant data change, the sensor will transmit every 10s. Once the sensor has been confirmed working correctly, then you can go to the next step.
- Use a tool to dig a hole and put the sensor in the soil. The hole depth should be the same as the sensing cap size and bury the sensor completely in the soil. Please do not use excessive force to push the sensor into the soil this might have the ceramic cap broken.
Wi-Fi Configure with gateway
To view the soil moisture data on your mobile application and receive email
alerts on our weather server, you need to pair this device with our GW1000 Wi-
Fi Gateway or HP2551/HP3500/HP3501 Weather Station (sold separately).
5.1 Pair with Gateway
If GW1000 has been in operation, and you have never had any WN51E soil
moisture sensor setup before, just power up the sensor and GW1000 will pick
soil moisture data automatically. Please make sure your setup on GW1000 has
this sensor enabled on the sensor ID setup page.
Note: The gateway can support max 8 soil moisture sensors. Each new sensor
will be recognized as a new channel according to the Power-on sequence. You
may attach a label of the channel on each sensor for distinction. The channel
name can be edited both on the app and the Ecowitt Weather server (will not
sync).
If you want to use a new WN51E sensor to replace the old one (already
configured on a certain channel , please try the following:
- Open the Sensor ID page on the WS View app, and find your old sensor ID.
- Power off the old sensor and power on the new sensor.
- Click Re-register on the Sensor ID page.
Then the new sensor will be learned and the old sensor will be erased.
5.2 Wi-Fi Connection for the Gateway
For this part, please refer to the manual of the GW1000 Wi-Fi gateway.
Any questions, please contact customer service.
View Online Data on WS View
When the Wi-Fi configuration is done, you can view the live data of your soil moisture sensor on the WS View application.
Note: It requires your phone and the gateway to use the same network to
view your sensor data on the WS View app.
To remote monitor the sensor data, please upload the data to our free Ecowitt
Weather Server: https://www.ecowitt.net.
Detailed operation instructions can be found in the GW1000 manual.
Any questions, please feel free to contact our customer service at
[email protected]
Custom mode
When in LIVE DATA display mode, you can calibrate the soil moisture sensor by enabling the Custom mode. (Click More – Choose Calibration – Choose Soil Calibration – Tick the box on the left side of the Customize).
| |
---|---|---
Custom OFF:
The moisture level is calculated based on the default dry and wet definition:
Dry (0%AD) AD: 70
Wet (100% AD) AD: 500
Soil Moisture = (moisture AD – 0%AD) 100% / (100% AD – 0%AD )
For example: when sensor moisture AD is 310, calculated moisture is:
(310 – 70)100% / (500-70) = 56%.
This is a fixed slope rate linear system.
Custom ON:
When pot soil under dry or wet conditions is not giving the moisture sensor
output value that is close to its default assumption, it will give inaccurate
moisture level results. It is commonly happening with different soil types
that give very different output values at the same moisture level condition.
We introduced this custom mode to make this slope flexible so that it can
match your soil type.
This becomes a variable slope rate linear system.
Adjusting principle:
0%AD is used to adjust for dry condition reading inconsistency.
When the displayed moisture readings are too high in dry soil conditions, you
could lower the slope rate by increasing the 0%AD value.
100%AD is used to adapt for wet condition reading inconsistency.
When the displayed moisture readings are too low at extremely wet soil
conditions, you could decrease the 100%AD value to fix it.
Please refer to the below example for a better understanding.
For example:
When you use this product for the first time, you may turn off the custom mode
and test the product at the following two situations:
Situation One:
Place the sensor into a glass of fresh water, and the displayed moisture
readings are much lower than 95%(e.g.70%).
Solution:
Enable custom mode, and adjust the 100%AD value.
Calculate the 100%AD value with the formula:
Soil Moisture = (moisture AD – 0%AD) 100% / (100% AD – 0%AD )
If:
Now AD = 183
0%AD = 70
Target Soil Moisture Reading = 95%
Then:
95% = (183 – 70)100%/(100%AD – 70 )
Result: 100%AD = 188(take the Integer part)
Then you can adjust the default 0%AD value to 188 and touch the screen once to
update the data. When you get your expected moisture reading, click Save to
save the setting.
Situation Two:
Leave the sensor aside without touching any water, and the displayed moisture
readings are much higher than 10% (e.g.40%).
Solution:
Enable the custom mode and adjust the 0%AD value.
Calculate the 0%AD value with the formula:
Soil Moisture = (moisture AD – 0%AD) 100% / (500 – 0%AD )
If:
Now AD = 183
100%AD = 500
Target Soil Moisture Reading = 10%
Then:
10% = (183 – 0%AD)100%/(500 – 0%AD )
Result: 0%AD = 147(take the Integer part)
Then you can adjust the default 0%AD value to 147 and touch the screen once to
update the data. When you get your expected moisture reading, click Save to
save the setting.
Note: The soil moisture sensor should be inserted totally into the soil
for accurate results.
Record the 0%AD and 100%AD values for future use (when the WIFI network
changed).
Note: In general, the device has been calibrated in the factory, and you
don’t need to calibrate it on your side.
Specification
Moisture Range: 0~100%;
Resolution: 1% 0%AD setting range:0~200;
Initial value: default to factory calibration. 100%AD
setting range: 0%AD+10~1000;
Initial value: default to its factory calibration
Frequency: 433/915/868 MHz(optional)
Sensor reporting interval: 71 seconds
Transmission distance in the open field: 100m(300 feet)
IP66 waterproof
Power consumption
- Soil moisture sensor: 1xAA Alkaline batteries (not included)
- Battery life: Minimum 12 months
Warranty Information
We disclaim any responsibility for any technical error or printing error,
or the consequences thereof.
All trademarks and patents are recognized.
We provide a 1-year limited warranty on this product against manufacturing
defects or defects in materials and workmanship.
This limited warranty begins on the original date of purchase, and is valid
only on products purchased, and only to the original purchaser of this
product. To receive warranty service, the purchaser must contact us for
problem determination and service procedures.
This limited warranty covers only actual defects within the product itself and
does not cover the cost of installation or removal from a fixed installation,
normal set-up or adjustments, or claims based on misrepresentation by the
seller, or performance variations resulting from installation-related
circumstances.
FCC Statement
Statement according to FCC part 15.19:
This device complies with part 15 of the FCC rules. Operation is subject to
the following two conditions:
- This device may not cause harmful interference.
- This device must accept any interference received, including interference that may cause undesired operation.
Statement according to FCC part 15.21:
Modifications not expressly approved by this company could void the user’s
authority to operate the equipment.
Statement according to FCC part 15.105:
NOTE: This equipment has been tested and found to comply with the limits
for a Class B digital device, pursuant to Part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses,
and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio
communications.
However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
FCC ID: WA5WN51E