Question 1

Do you have wh51 transmits at 433 mhz? what would it be named? wh51a? or wh51c?

Accepted Answer

My WH51B devices use 914915000, or about 915Mhz. If you are trying to identify which frequency band your device is using, I couldn't do it from packaging. The best answer that I could give you is that if you bought it on Amazon with a US shipping address, then you probably got the 915 version instead of the 433 that you thought you were buying. I understand that if you need a 433, you can contact Ecowitt and they will send you one intended for another country.

RTL_433 can be configured to use the 915 band, though this will mean you have two instances of RTL_433 and the sdr hardware. I do. The WH51B is not a powerful transmitter, and the receiver can't be a long distance away.

I struggled with getting the WH51B to work with RTL_433, so I'll share my config:

frequency 914915000
sample_rate 250000
protocol 142
report_meta time:off
output mqtt:192.168.0.xxx,events=eco2mqtt[/id]

If you have trouble, post in the RTL_433 github issues and someone will help.

Question 2

What is %ad? how does it relate to any standard measure of soil water content

Accepted Answer

Hi, the %ad refers to the defaut dry definition on the fixed slope rate linear system.
We recommend you to have a look at the manual(you can download it on our official website) from P8-12 to understand that better.
Any question, please contact us at support@ecowitt.com.

Question 3

Can you just leave the wh51 soil moisture sensor in the ground outdoors to constantly check the soil with the gw1000 remotely?

Accepted Answer

Hi, yes. The wh51 is communicating with the gw1000 via RF signal and the reporting distance is within 300feet/100m(in open area).
After you finish the wifi configuration on the free WS View app with the gw1000, you can upload the data to our own weather server: ecowitt.net.
Then you can remoting the data by visting the ecowitt.net website(need to add your gw1000 device on the website first).
Any other question, please let us know at support@ecowitt.com.:)

Question 4

Can this who291 transmit to the lcd display panel and also a gw1000 wifi gateway for logging, at the same time?

Accepted Answer

Hi, GW1000 can accept the sensor data in the WH0291 and upload to our free weather server: ecowitt.net. So the GW1000 + WH0291 works!
The WH0291 actually is the WH51 sensor with a display.
Any other question, please contact us at support@ecowitt.com.:-)

ASIN	B07CJYTSH1
Battery Description	2 AA batteries
Best Sellers Rank	62,844 in Garden ( See Top 100 in Garden ) 90 in Soil Meters
Brand	ECOWITT
Colour	WH0291
Country Of Origin	China
Customer Reviews	4.2 4.2 out of 5 stars (484)
Item Dimensions W x H	15W x 3H centimetres
Manufacturer	ECOWITT
Manufacturer Part Number	WH0291B
Model Number	WH0291B
Mounting Type	Tabletop
Number of Items	1
Operating Humidity	[Broad]
Temperature Accuracy	10
UPC	711639641105
Upper Temperature Rating	50 Degrees Celsius

ECOWITT WH0291 Soil Moisture Tester Plant Soil Moisture Sensor Meter with Digital LCD Display for Garden Lawn Potted Plant Care Indoor Outdoor Pairing with GW1100 868MHZ

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