ecowitt WH51 Wireless Soil Moisture Sensor Instruction Manual
- June 9, 2024
- ECOWITT
Table of Contents
Wireless Soil Moisture Sensor
Model: WH51
WH51 Wireless Soil Moisture Sensor
Help
Our product is continuously changing and improving, particularly online
services and associated applications. To download the latest manual and
additional help, please contact our technical support team:
support@ecowitt.com
support.eu@ecowitt.net (EU/UK)
Introduction
Thanks for purchasing this WH51 soil moisture sensor. This device measures
soil moisture. The data can be streamed by GW1000/GW1100 Wi-Fi Gateway (sold
separately) and can be viewed on our WS View Plus/Ecowitt APP mobile
application after the Wi-Fi configuration done.
Or a receiver console can be used to display the received sensor value. 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 Battery Cap Cover
One User Manual
Overview
- LED Indicator (RF transmission)
- Battery Cap
- Soil Moisture Sensor
3.1 Features
Soil Moisture Sensor
- Measures soil moisture content every 70 seconds.
- 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 result for different soil types. This mode can only be activated through WS View plus app and in live data display mode.
- Long wireless range, up to 300 feet (100 meters) in open areas
When paired with a GW1000/GW1100 Wi-Fi Gateway:
- Monitor live sensor data on the Live Data page of the WS View plus app (requires the gateway and your phone is using the same Wi-Fi network)
- Up to 8 channels 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 supported. Channel names can be edited on the Display (for HP2551 only).
When paired with Console WH0291:
- View soil moisture data in real-time on the Display
When uploaded to Ecowitt Weather Server:
- View current soil moisture data & history records & graph on the website
- Set and receive email alerts from the server
- Channel names can be edited on the website
- Remote monitoring with smart phone, laptop, or computer by visiting the website
Note: The WH51 and WN51 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 battery cap.
-
After inserting the battery, the remote sensor LED indicator will light for 4 seconds, and then flash once per 70 second thereafter. Each time it flashes, the sensor is transmitting data. You may go to Section 5 now to complete the GW1000/GW1100 gateway configuration first to make its data displayed and resume the steps followed
below. -
Before install the sensor into its permanent location, we would suggest test the sensor in air, and see 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 sensor detected a significant data change, sensor will transmit every 10s. Once sensor has been confirmed working correctly, then you can go to next step.
-
Insert the sensor totally into the soil of your desired location. Please do not use excessive force to push the sensor into the soil to avoid any damage.
-
When all is working correctly, place the battery cover over the battery door tightly to assure there is no chance of moisture or water penetrated inside.
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/GW1100 Wi-Fi Gateway or HP2551/HP3500/HP3501 Weather Station (sold separately).
5.1 Pair with Gateway
If GW1000/GW1100 has been in operation, and you have never had any WH51 soil
moisture sensor setup before, just power up the sensor and GW1000/GW1100 will
pick soil moisture data automatically.
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 ecowitt.net (will not sync).
If you want to use a new WH51 sensor to replace the old one (already
configured on certain channel), please try the following:
- Open the Sensor ID page on the WS View plus 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/GW1100 Wi-Fi gateway.
Any question, please contact the customer service.
View Online Data on WS View Plus/Ecowitt APP
When the Wi-Fi configuration is done, you can view the live data of your soil moisture sensor on the WS View Plus application.
Note: It requires your phone and the gateway using the same network to
view your sensor data on the WS View Plus 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 on the GW1000/GW1100 manual. Any
question, please feel free to contact our customer service at
support@ecowitt.com or
support.eu@ecowitt.net (EU/UK).
Custom mode
When in LIVE DATA display mode, you can calibrate the soil moisture sensor by enable the Custom mode. (Click More – Choose Calibration – Choose Soil Calibration – Tick the box on the left side of the Customize).
Custom OFF:
Moisture level is calculated based on 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 )
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 at dry or wet condition 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 type that gives very different output
value at 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 at dry soil condition, 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
condition, you could decrease the 100%AD value to fix it.
Please refer to the below example for better understanding.
For example:
When you use this product at 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 is 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 for
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 for
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 result. Record the 0%AD and 100%AD value for future use (when
WIFI network changed).
Note: In general, the sensor need to be calibrated to suit your soil
type.
Note: Calibration is only saved on gateway side, so if you have two
different consoles handling this data, you will need to enable custom mode and
having same calibration for 0% and 100% to make consoles showing same soil
moisture.
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: 915/868/433MHz
depending on location
(North American:915MHz; Europe:868MHz; Other areas:433MHz) Sensor reporting
interval: 70 seconds
Transmission distance in 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, 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.
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References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>