ECOWITT WH51L User manual

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Wireless Soil Moisture Sensor
Model: WH51L
Contents
1. Introduction ................................................. 4
2. Getting Started .............................................4
2.1 Parts List ................................................4
3. Overview ..................................................... 6
3.1 Features ..................................................7
4. Setup Guide ............................................... 10
4.1 Install batteries .................................... 10
5. Wi-Fi Configure with gateway ..................12
5.1 Pair with Gateway ............................... 12
5.2 Wi-Fi Connection for the Gateway ..... 13
6. View Online Data on WSView Plus/Ecowitt
APP ............................................................14
7. Custom mode .............................................16
8. Specification ..............................................25
9. Warranty Information ................................ 27

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Instruction manuals
https://s.ecowitt.com/VYT490

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Help
Our product is continuously changing and impro-
ving, particularly online services and associated
applications. To download the latest manual and
additional help, please contact our technical sup-
port team:
[e-mail]
[e-mail] (EU/UK)

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1. Introduction
Thanks for purchasing this WH51L soil
moisture sensor. This device measures soil
moisture. The data can be streamed by
GW1100 / GW2000 Wi-Fi Gateway (sold
separately) and can be viewed on our WSView
Plus / Ecowitt APP mobile application after the
Wi-Fi configuration done. Or a receiver
console can be used to display the received
sensor valuw.
To ensure the best product performance, please
read this manual and retain it for future
reference.
2. Getting Started
2.1 Parts List
One Soil Moisture Sensor
One Screw ST D5.8*M3*15 Stainless Steel

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PA for Mounting
One Stainless Steel Loop 19~29 8mm for
Mounting
One Fix Bracket 35.1x21x20mm Stainless
Steel for WN51L
One User Manual

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3. Overview
1
Soil Moisture Sensor Probe
2
1m/3.28ft PVC Wire
3
LCD Display
4
Battery Compartment

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3.1 Features
Soil Moisture Sensor
Measures soil moisture content every 70
seconds in standard cycle and transmit the
data via RF.
When the current measurement is
significant difference from the next time
data, RF will enter into quick-transmit
state and WH51L will transmit the data
every 10 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 WSView plus app and in live data
display mode.
Long wireless range, up to 300 feet (100
meters) in open areas.

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When paired with a GW1100/GW2000
Wi-Fi Gateway:
Monitor live sensor data on the Live Data
page of the WSView 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/HP2560):
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.

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WH51L could also pair with WH0291
display console. But one display console
could only pair with one WH51L or
WH51.
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 WH51L 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

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two sensors could not exceed eight.
4. Setup Guide
4.1 Install batteries
1. Unscrew the screws of the battery
compartment.

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2. Insert one AA battery and tighten the screw
of the battery compartment.
3. After inserting the battery, the LCD display
will display all the sections 2 seconds, and
then the screen would displays the model
number, RF frequency, and 'L' 2 seconds,
finally the screen would display the Max
and the Min data 3 seconds.
4. 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.
5. 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

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avoid any damage.
5. 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 GW1100/GW2000 Wi-Fi Gateway or
HP2551/HP3500/HP2560 Weather Station
(sold separately).
5.1 Pair with Gateway
If GW1100/GW2000 has been in operation,
and you have never had any WH51L soil
moisture sensor setup before, just power up the
sensor and GW1100/GW2000 will pick soil
moisture data automatically.
Note: The gateway can support max 8 soil
moisture sensors. Each new sensor will be

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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 WH51L sensor to
replace the old one (already configured on
certain channel), please try the following:
1. Open the Sensor ID page on the WSView
plus app, and find your old sensor ID.
2. Power off the old sensor and power on the
new sensor.
3. 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
GW1100/GW2000 Wi-Fi Gateway.

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Any question, please contact the customer
service.
6. View Online Data on WSView
Plus/Ecowitt APP
When the Wi-Fi configuration is done, you can
view the live data of your soil moisture sensor
on the WSView Plus App application.

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Note: It requires your phone and the gateway
using the same network to view your sensor
data on the WSView 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 GW1100/GW2000 manual.
Any question, please feel free to contact our
customer service at [e-mail] or
support.e[email protected]et (EU/UK).
7. Custom mode
When you finish GW1100/GW2000 Wi-Fi
configuration and log in Ecowitt APP, you can
calibrate the soil moisture sensor by enable the
Custom mode. (Click 'Weather Station' -
choose the GW2000 that configured to your
router - click upper right ‘... ’- choose

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Calibration - choose 'Multi_CH Soil' and then
you could manually calibrate the data.)

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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