It has fast response and good sensors for humidity/temperature/barometer with very small deviations.
_Negatives now_
_The forecast indicator is useless, the bad weather adel was right above my house, raining heavily, barometer at 1010 and it showed clouds with sun on the screen._
_The rainfall indicator at the same time showed a higher reading on the screen 6.6 mm/h while the HNMS indicator in my city (https://www.meteo.gr/) and at a distance of 1000 meters from me reached up to 27.2 mm/h. On the other hand, for rainfall of 1-3 mm/s it seems to follow the station's readings._
_Finally, I would prefer the wind speed to be shown in Km/h and not in m/s._
Overall, it is a good device for the basics and to simply inform you if it is raining outside.
_05/12/25 Bad weather BYRON_
Bresser temp 14.0 HNMS Station 13.4
Bresser Humidity 91% HNMS Station 89%
Bresser Barom 1001 hPa HNMS Station 1003.1 hPa
Bresser Rain Rate 2.4 mm/h HNMS Station 5.5 mm/h
forecast clouds with rain finally
I do not mention the wind readings because from southern directions the house wall at 7 meters distance interferes, so they are not accurate._

In terms of measurements, it is almost on par with the nearby station of the professional company Davis.
For local installation, the owner doesn't need to do anything essentially, as the external station is recognized almost automatically. The external station easily reaches up to 7 meters from the internal one.
In terms of data transmission to the internet, I would expect a better web interface that the owner can view locally with an internal IP, as well as more settings options.
It connects relatively easily with the website "weathercloud.com," as long as you follow the site's instructions exactly. It is also better to manually copy the password to avoid any spaces that may be transferred in copy-paste and then not work.
One impressive positive aspect is that the weather cloud supports the internal temperature and humidity of the station, which is only visible with the owner's login. The website for my station is https://app.weathercloud.net/d1290033388#current.
With the website "wunderground.com," there is no mention in the enclosed instructions about the type of machine that needs to be declared (the site still does not include the brand Bresser and the model 5 in 1), resulting in data not being uploaded if someone selects "other" as the type.
Finally, the package does not include 3 AA batteries for the external station, nor the basic CR-2032 backup battery for the internal unit (a negligible cost for such a station).
For an amateur who is looking for an economical solution to view the weather conditions in their area, both for the external and internal station on the internet, it is an ideal solution for their money.

Purchased a few days ago, the first impressions are very good.
Positives: very easy installation-connection of the external unit with the internal one, as well as the wifi connection, just follow the instructions to the letter. Quite reliable measurements, I compared it to much more expensive stations in my area. Some parameters, such as pressure and humidity, may need adjustment through the setup. As for rain, okay, in 2 cases I realized that it won't catch drizzle, but in normal rain intensity, the millimeters it shows are satisfactory.
Important for me is that the internal unit operates on electricity.

Negatives: the viewing angle of the screen is good when you look at it straight, otherwise forget it, the Lo option in the lighting also flickers a bit for me, I don't know why, but it's not that important. If I find anything else along the way, I will edit.

Tips: create an account on both Weather Underground and Weathercloud because on one hand, the former has better refresh-update and doesn't freeze like Weathercloud, but the latter allows you to export your data.

Edit 11/1/2022: the station really deserves its money and more, I highly recommend it. Its measurements, even the rain, are very satisfactory, it may miss a bit of drizzle or be slow to record, but in the end, as a measurement, it is very close to reality (checked against more expensive networks).
One bug I found is in the connection with Weathercloud, when you enter the setup and change settings, it freezes and doesn't send data, you probably need to re-enter your username and password before applying.

For several years now, I have purchased around 5-6 different models from both La Crosse and Oregon, which are considered reliable companies in the category of Wireless Weather Stations in the price range of 120-190 euros. The choice of the Bresser Weather Center 5-in-1 WLAN Prof Sensor 7002580 is the best choice I have made so far, priced at 160 euros.

I am located in Kifisia at an altitude of 310 meters above sea level. In my case, it has been placed 50 meters above the solar water heater boiler, and the temperature and humidity are not affected by sunlight or the surrounding surfaces of the roof. The readings are absolutely accurate, and that's all I care about. It has been cross-checked with weather stations from other companies in the same location as the Bresser. This is evident in comparison to the surrounding weather stations in my area, some of which are professional (like Davis). Nothing less, nothing more.

You can find it live here: https://www.wunderground.com/dashboard/pws/IKIFIS10

If anyone has a different opinion, then go ahead and spend 450-500 euros and buy a Davis (the cheapest version available) and have accurate measurements!

Happy shopping!

Well, the station is the best value for money...
I have had it for 6 months and I have tested it in all weather conditions with neighboring stations that have at least 5 times the value.... It doesn't lose anywhere in measurements. The screen is very good but it's difficult to see what it says from an angle....
The only disadvantage that all stations with the temperature sensor inside the hive and not freely placed in a ventilated cage have is that on sunny and windless days the temperature rises quite a bit....

Update..... After 9 months I think that for the 95 euros I bought the station, they simply gave it to me...
A beast of reliability in its measurements (except for the known problem with sunny and windless days that all non-ventilated stations have)... It has NEVER disconnected from me despite the distance from the rooftop... I made a mistake by not buying 2-3 more with that money to put them in my villages and have one in the attic...

Update. Today marks one year of perfect operation.... I also did the latest updates and everything is fine.
I wish I had bought 3-4 more stations for the 95 euros I bought it for.....

It is a good choice for someone who wants to enter the field of meteorological stations or simply needs a cheap solution to get started. I note:
1. Its measurements appear accurate and have good repeatability, although I do not have a standard instrument for verification. It has settings for correcting all measurements if any deviations are detected (e.g., offset for temperature, pressure, and gain for windspeed, rain, etc.).
2. The anemometer is almost at the same height as the rain gauge unit. So unfortunately, when it blows from southern directions, the measured speed loses accuracy.
3. It connected to WUnderground (somewhat difficult) and WeatherCloud. WU has a variety of charts but does not export files. WC has poorer data but outputs measurements to a file if desired. Ideally, it would have its own platform, thus providing full functionality for processing measurements.
4. The color screen is a joke. There is no color screen, it is just colored clouds on the panel. It has backlighting, but the buttons do not, so you struggle in the dark.
5. I would like more options for measurement units, e.g., it does not have mbar for pressure.
6. The ability to connect 7 additional sensors is useful, although I have not used it.

For this money, I believe it is a fairly decent solution because one can easily take advantage of the device's capabilities.

The measurements are quite accurate... I have placed it in the area of Lete, Thessaloniki... and I have connected it to wunderground and weathercloud... the only thing I couldn't adjust is the barometer... If you set the weather station to face north, then you will have accurate indications of the wind direction (there is a little arrow on the external unit that should point to the North)... for its price, I recommend it... it is a good tool for an amateur meteorologist... 2/1/20

Finally, the barometer has been adjusted... the barometer is adjusted initially when you connect the station to weather cloud and wunderground.. you go to the Advanced settings and adjust everything from there... the station takes 1013 hPa as the base... so, if you check a nearby station in your area and, for example, it says the station is 1009 hPa, you set the barometer to minus -4. I have had it for a month now... I am very satisfied with its measurements... I have placed it on the rooftop of my house, 2 meters above the tiles...

17/4/20 if you manage to attach a small fan on top of the temperature sensor, then you will have accurate indications during midday... otherwise, it is quite affected by the sun... In terms of connectivity, the signal has never been lost and I have it on the rooftop of my house... very good despite that...

29/6/20 with the small fan, I now have very accurate measurements during midday... I was waiting for summer to have a definite opinion... the station now shows perfectly!

I should add that

[After exactly one year of operation, the 3 AA batteries required for the external sensor system of the roof needed to be replaced. Otherwise, the same opinions still apply where ... I still have the same opinions about the device (internal and external) which both function smoothly while there has been no need to replace the batteries yet. The forecasts provided by WunderGround based on the measurements of the weather station have proven to be accurate for at least the 10-day period given. Ultimately, I prefer the overview of the station from the internet browser rather than the android app.]...

I have placed the external sensor system on the rooftop of the apartment building at a distance horizontally and vertically from the base station of 25 meters and more, which is a typical distance between the ground floor and the rooftop of apartment buildings, and the signal remains strong.

The indications provided by the sensors are quite accurate. The internal screen is vibrant and bright at high brightness, and its size is very satisfactory in terms of observation. If there is a small issue, it is with the viewing angle, which is excellent when the viewing is done at approximately the same level as the screen, but the clarity decreases as the viewing angle becomes higher.

The variety of functions it offers works exceptionally well with all its sensors, and the forecast predictions provided by WunderGround are quite accurate. The real-time online monitoring through the mobile android app and the browser on Windows is excellent as well. The device's connection to the wifi router and the outside world on the internet is done in AP mode (Access Point, meaning that it can be activated at any time by holding down the wifi button for 6 seconds, and then the "AP" indication flashes on the screen), and it did not encounter any issues and was completed as the instructions explained without requiring any repetition. ***

Note 1: The remote sensor system that is installed on the roof should be oriented with the symbol "<--N" engraved on the top part of the device facing north in order for the transmission of wind direction information to be accurate. Otherwise, there may be deviations in the wind direction. For this reason, in the initial settings (192.168.1.1), there is a related correction field in the Advanced option, allowing for correction up to +-10 degrees of deviation from the north.

Note 2: Another feature that I would like, but apparently it does not have, is the ability to operate with batteries as well. Because although it normally displays with the power supply it has, from what I have noticed, the CR2032 battery it has is not for displaying the information on the screen, but only for maintaining and transmitting the settings. (Understandable, of course, since with such a large and bright screen, how could it function with just one CR2032 battery?)

I have been using the device for only 3 days, and if I have any other observations regarding its durability, etc., I will come back in the future.