Here is some infos about an OMG compatible Door sensor mainly interesting by the fact it send a signal for open status and a different signal for close status of the door.
When the AAA battery is low it sends also a signal continuously (every 3s and the led blink), I encountered it when the battery was at 1V.
Affiliated link
Here is the comparison with its main competitor the NEW DIGOO:
Range estimation
With line of sights between the sensor on a vertical position and a sonoff RF Bridge I measure more than 25 meters of range.
Power consumption estimation
When sending signal (open or close) 34mA during 1,4s
Sleep current 54uA as average
Hi, few days ago I get the same but with option that send status also when you try to remove it. I think that aslo send status when battery is low, we will see. I have problem with range when it is connected to metal door (max 3m range).
€ 5,83 6%OFF | YobangSecurity 433MHz Wireless Magnetic Door Sensor Detector Door Contact Detect Door Close Open for G90B WIFI GSM Alarm System https://s.click.aliexpress.com/e/cWJBKzUk
The first one looks great and the price is excellent, especially with the use of a common AAA battery.
I don’t see a temper sensor on it, but for me at least its not needed.
What kind of range did you get indoors?
I’ve ordered this one for leakage detection to place near my washing machine and refrigerator since its the only one i’ve found which (supposedly) sends a low voltage alert:
Now i’m looking for a low power stand-alone learning RF receiver which will trigger a wireless motor+battery device that will unlock all the internal doors in the house when someone is home.
I’m using these as well. Good price and cheap to replace batteries, though I occasionally get a door or window that remains ‘open’ even though it is closed.
Can confirm they do have a low battery and tamper signal as a separate code. Mine do not have a tamper switch, same as the photos above, but there is a spot there on the PCB for one next to the reed switch (4 pcb holes marked S2), so if you can find an appropriate switch, a tamper option can be added. The tamper code is sent when the circuit is broken.
If the close code is for example 1000010 then the other codes will be:
battery 1000002
tamper 1000003
open 1000006
close 1000010
Sorry, I’m new and this is probably a daft question. I got one of these senors recently and sucessfully got it working with the gateway, but I notice my codes are different:
Closed 3225102
Open 3225098
From the above I’m guessing the low battery code will be 3225094?
Do all sensors of this model have unique codes like this? I’m hoping this is the case so I can use multiple sensors and determine which window/door is open.
I have about 15 of these sensors and you are indeed correct, the codes do not always end in 06 and 10 for open and close. They are always 4 apart though. And I am guessing that your assumption on the low battery code is correct, but I have yet to test it…
Hi everyone,
after few weeks using 5 of these sensors i realized that something is wrong with reliability…
In details the problem on all of the units is the one showed by this video:
If i open the contact slowly, it locks and doesn’ t work anymore until i hit with my finger the unit.
Did anybody experience this issue? Any possible solution?
Thanks!
in my understanding probably seems like the plates of the reed remain coupled. This may explain why there is no more trigger in both directions, and also when i hit with my finger the sensor probably the plates are open again and signal is triggered.
Maybe do you know if i can find only the reed and replace it?
also on other forums i found the same issue description!