Bresser 7002581 (5-in-1-Profi-Sensor) detected as 6-in-1, lacks pressure, precipitation static at 928, shows inexistant UV level

[cvdr]

Hello world,

I'm successfully receiving signals from my Bresser weather station model # 7002581 ("BRESSER WLAN-Farbwetterstation mit 5-in-1-Profi-Sensor" / "BRESSER Wi-Fi Colour Weather Station with 5-in-1 Professional Sensor"), however although it is a 5-in-1 sensor it is detected as 6-in-1 (protocol 172) which I think is the cause for the following issues:

• air pressure is not decoded at all
• precipitation ("rain_mm") returns a static value of 928 at all times
• max wind speed ("wind_max_m_s") and average wind speed ("wind_avg_m_s") appear to be the same at all times
• a UV level reading is returned (static at 44.4) despite the unit does not have a UV sensor

Is this device using a modified device protocol? Forcing rtl_433 to use device protocol 119 (Bresser Weather Center 5-in-1) does not return any output.

Here's a bit of output without locking the device protocol:
`_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
time : 2024-11-18 22:52:09
model : Bresser-6in1 id : 11630821
channel : 0 Sensor type: 1 Wind Gust : 0.0 m/s Wind Speed: 0.0 m/s
Direction : 158 Rain : 928.0 mm Startup : 1 Flags : 1
Integrity : CRC
Modulation: FSK Freq1 : 868.2 MHz Freq2 : 868.3 MHz
RSSI : -0.1 dB SNR : 29.0 dB Noise : -29.1 dB

---

time : 2024-11-18 22:52:21
model : Bresser-6in1 id : 11630821
channel : 0 Battery : 0 Temperature: 2.2 C Humidity : 84
Sensor type: 1 Wind Gust : 0.0 m/s Wind Speed: 0.0 m/s Direction : 158
UV : 44.4 Startup : 1 Flags : 0 Integrity : CRC
Modulation: FSK Freq1 : 868.2 MHz Freq2 : 868.3 MHz
RSSI : -0.1 dB SNR : 31.6 dB Noise : -31.7 dB

---

time : 2024-11-18 22:52:33
model : Bresser-6in1 id : 11630821
channel : 0 Sensor type: 1 Wind Gust : 0.0 m/s Wind Speed: 0.0 m/s
Direction : 158 Rain : 928.0 mm Startup : 1 Flags : 1
Integrity : CRC
Modulation: FSK Freq1 : 868.2 MHz Freq2 : 868.3 MHz
RSSI : -0.1 dB SNR : 27.6 dB Noise : -27.7 dB

---

time : 2024-11-18 22:52:45
model : Bresser-6in1 id : 11630821
channel : 0 Battery : 0 Temperature: 2.1 C Humidity : 84
Sensor type: 1 Wind Gust : 0.0 m/s Wind Speed: 0.0 m/s Direction : 158
UV : 44.4 Startup : 1 Flags : 0 Integrity : CRC
Modulation: FSK Freq1 : 868.2 MHz Freq2 : 868.3 MHz
RSSI : -0.1 dB SNR : 27.7 dB Noise : -27.8 dB
`

Your input is greatly appreciated! And even more appreciated is merbanan's work on rtl_433! Thank you very much!

[zuckschwerdt]

The Bresser 6-in-1 protocol is also for newer devices labeled "5-in-1". There is some info here:
https://github.com/merbanan/rtl_433/blob/master/src/devices/bresser_6in1.c#L15-L28

The 5in1 Sensor, Art.No.: 7002580 was previously reported working. Rain is cumulative, i.e. should only go up and not reset.

An invalid UV reading should be ff01 not 444, strange. Can you post codes from running -R 172:v?

[cvdr]

Thanks for looking into it @zuckschwerdt !

Here's the verbose output:

`time : 2024-11-19 07:24:33
model : Bresser-6in1 id : 11630821
channel : 0 Sensor type: 1 Wind Gust : 0.0 m/s
Wind Speed: 0.0 m/s Direction : 180 Rain : 928.0 mm
Startup : 1 Flags : 1 Integrity : CRC
Modulation: FSK Freq1 : 868.2 MHz Freq2 : 868.3 MHz
RSSI : -0.1 dB SNR : 32.5 dB Noise : -32.6 dB
pulse_slicer_pcm(): Bresser Weather Center 6-in-1, 7-in-1 indoor, soil, new 5-in-1, 3-in-1 wind gauge, Froggit WH6000, Ventus C8488A
bitbuffer:: Number of rows: 1
[00] {274} 55 55 55 55 55 16 ea 25 b3 88 b1 84 10 8c 7f ff ff 8c 04 7f b6 bf ff 80 a1 00 00 00 00 00 00 00 00 00 00

---

time : 2024-11-19 07:24:45
model : Bresser-6in1 id : 11630821
channel : 0 Battery : 0 Temperature: -1.8 C
Humidity : 94 Sensor type: 1 Wind Gust : 0.0 m/s
Wind Speed: 0.0 m/s Direction : 180 UV : 44.4
Startup : 1 Flags : 0 Integrity : CRC
Modulation: FSK Freq1 : 868.2 MHz Freq2 : 868.3 MHz
RSSI : -0.1 dB SNR : 31.2 dB Noise : -31.4 dB
pulse_slicer_pcm(): Bresser Weather Center 6-in-1, 7-in-1 indoor, soil, new 5-in-1, 3-in-1 wind gauge, Froggit WH6000, Ventus C8488A
bitbuffer:: Number of rows: 1
[00] {274} 55 55 55 55 55 16 ea 60 c2 08 b1 84 10 8c 7f ff ff 8c 04 4c 14 4a 5d d8 37 00 00 00 00 00 00 00 00 00 00

---

time : 2024-11-19 07:24:57
model : Bresser-6in1 id : 11630821
channel : 0 Sensor type: 1 Wind Gust : 0.0 m/s
Wind Speed: 0.0 m/s Direction : 180 Rain : 928.0 mm
Startup : 1 Flags : 1 Integrity : CRC
Modulation: FSK Freq1 : 868.2 MHz Freq2 : 868.3 MHz
RSSI : -0.1 dB SNR : 26.8 dB Noise : -27.0 dB
pulse_slicer_pcm(): Bresser Weather Center 6-in-1, 7-in-1 indoor, soil, new 5-in-1, 3-in-1 wind gauge, Froggit WH6000, Ventus C8488A
bitbuffer:: Number of rows: 1
[00] {274} 55 55 55 55 55 16 ea 25 b3 88 b1 84 10 8c 7f ff ff 8c 04 7f b6 bf ff 80 a1 00 00 00 00 00 00 00 00 00 00

---

time : 2024-11-19 07:25:09
model : Bresser-6in1 id : 11630821
channel : 0 Battery : 0 Temperature: -1.8 C
Humidity : 94 Sensor type: 1 Wind Gust : 0.0 m/s
Wind Speed: 0.0 m/s Direction : 180 UV : 44.4
Startup : 1 Flags : 0 Integrity : CRC
Modulation: FSK Freq1 : 868.2 MHz Freq2 : 868.3 MHz
RSSI : -0.1 dB SNR : 28.4 dB Noise : -28.5 dB
pulse_slicer_pcm(): Bresser Weather Center 6-in-1, 7-in-1 indoor, soil, new 5-in-1, 3-in-1 wind gauge, Froggit WH6000, Ventus C8488A
bitbuffer:: Number of rows: 1
[00] {274} 55 55 55 55 55 16 ea 60 c2 08 b1 84 10 8c 7f ff ff 8c 04 4c 14 4a 5d d8 37 00 00 00 00 00 00 00 00 00 00

---

time : 2024-11-19 07:25:21
model : Bresser-6in1 id : 11630821
channel : 0 Sensor type: 1 Wind Gust : 0.0 m/s
Wind Speed: 0.0 m/s Direction : 180 Rain : 928.0 mm
Startup : 1 Flags : 1 Integrity : CRC
Modulation: FSK Freq1 : 868.2 MHz Freq2 : 868.3 MHz
RSSI : -0.1 dB SNR : 26.5 dB Noise : -26.6 dB
pulse_slicer_pcm(): Bresser Weather Center 6-in-1, 7-in-1 indoor, soil, new 5-in-1, 3-in-1 wind gauge, Froggit WH6000, Ventus C8488A
bitbuffer:: Number of rows: 1
[00] {274} 55 55 55 55 55 16 ea 25 b3 88 b1 84 10 8c 7f ff ff 8c 04 7f b6 bf ff 80 a1 00 00 00 00 00 00 00 00 00 00

---

time : 2024-11-19 07:25:33
model : Bresser-6in1 id : 11630821
channel : 0 Battery : 0 Temperature: -1.8 C
Humidity : 94 Sensor type: 1 Wind Gust : 0.0 m/s
Wind Speed: 0.0 m/s Direction : 180 UV : 44.4
Startup : 1 Flags : 0 Integrity : CRC
Modulation: FSK Freq1 : 868.2 MHz Freq2 : 868.3 MHz
RSSI : -0.1 dB SNR : 31.2 dB Noise : -31.4 dB
pulse_slicer_pcm(): Bresser Weather Center 6-in-1, 7-in-1 indoor, soil, new 5-in-1, 3-in-1 wind gauge, Froggit WH6000, Ventus C8488A
bitbuffer:: Number of rows: 1
[00] {274} 55 55 55 55 55 16 ea 60 c2 08 b1 84 10 8c 7f ff ff 8c 04 4c 14 4a 5d d8 37 00 00 00 00 00 00 00 00 00 00

---

time : 2024-11-19 07:25:45
model : Bresser-6in1 id : 11630821
channel : 0 Sensor type: 1 Wind Gust : 0.0 m/s
Wind Speed: 0.0 m/s Direction : 180 Rain : 928.0 mm
Startup : 1 Flags : 1 Integrity : CRC
Modulation: FSK Freq1 : 868.2 MHz Freq2 : 868.3 MHz
RSSI : -0.1 dB SNR : 28.2 dB Noise : -28.3 dB
pulse_slicer_pcm(): Bresser Weather Center 6-in-1, 7-in-1 indoor, soil, new 5-in-1, 3-in-1 wind gauge, Froggit WH6000, Ventus C8488A
bitbuffer:: Number of rows: 1
[00] {274} 55 55 55 55 55 16 ea 25 b3 88 b1 84 10 8c 7f ff ff 8c 04 7f b6 bf ff 80 a1 00 00 00 00 00 00 00 00 00 00

---

time : 2024-11-19 07:25:57
model : Bresser-6in1 id : 11630821
channel : 0 Battery : 0 Temperature: -1.8 C
Humidity : 94 Sensor type: 1 Wind Gust : 0.0 m/s
Wind Speed: 0.0 m/s Direction : 180 UV : 44.4
Startup : 1 Flags : 0 Integrity : CRC
Modulation: FSK Freq1 : 868.2 MHz Freq2 : 868.3 MHz
RSSI : -0.1 dB SNR : 30.6 dB Noise : -30.7 dB
pulse_slicer_pcm(): Bresser Weather Center 6-in-1, 7-in-1 indoor, soil, new 5-in-1, 3-in-1 wind gauge, Froggit WH6000, Ventus C8488A
bitbuffer:: Number of rows: 1
[00] {274} 55 55 55 55 55 16 ea 60 c2 08 b1 84 10 8c 7f ff ff 8c 04 4c 14 4a 5d d8 37 00 00 00 00 00 00 00 00 00 00

---

time : 2024-11-19 07:26:09
model : Bresser-6in1 id : 11630821
channel : 0 Sensor type: 1 Wind Gust : 0.0 m/s
Wind Speed: 0.0 m/s Direction : 180 Rain : 928.0 mm
Startup : 1 Flags : 1 Integrity : CRC
Modulation: FSK Freq1 : 868.2 MHz Freq2 : 868.3 MHz
RSSI : -0.1 dB SNR : 24.9 dB Noise : -25.0 dB
pulse_slicer_pcm(): Bresser Weather Center 6-in-1, 7-in-1 indoor, soil, new 5-in-1, 3-in-1 wind gauge, Froggit WH6000, Ventus C8488A
bitbuffer:: Number of rows: 1
[00] {274} 55 55 55 55 55 16 ea 25 b3 88 b1 84 10 8c 7f ff ff 8c 04 7f b6 bf ff 80 a1 00 00 00 00 00 00 00 00 00 00
`

I also observed strange behaviour of the precipitation values last night. They kept jumping from the constant value of 928 to a range between 66677.3 and 66977.2 just to recede to 928 again. Here's the chart from Home Assistant:

[zuckschwerdt]

On a first glance the values look ok. Here is a BitBench decoding the raw codes.

Note that the two codes you posted are the two alternating message types, rain and temperature.
The temperature and humidity fields are shared with rain counter fields, by using BCD and inverted BCD digits.
The decoded fields look plausible except for the strange UV value of 0x444 or 0xbbb.

Try adding more codes and to see if there are unusual flags or such.

[cvdr]

Thanks. I made an interesting observation: right now the rainfall reading is 933.2mm which is 5.2mm more than the readings I had the other day (928). And the indoor weather station shows 5.2mm of rainfall for today.

So my theory is 928 (the value I mentioned in my initial post) corresponds to 0mm and the difference to 928 the daily precipitation in mm.

`time : 2024-11-21 21:11:14
model : Bresser-6in1 id : 11630821
channel : 0 Battery : 0 Temperature: -3.0 C Humidity : 85 Sensor type: 1 Wind Gust : 0.0 m/s Wind Speed: 0.0 m/s Direction : 135
UV : 44.4 Startup : 1 Flags : 0 Integrity : CRC
Modulation: FSK Freq1 : 868.2 MHz Freq2 : 868.3 MHz
RSSI : -0.1 dB SNR : 29.5 dB Noise : -29.6 dB
pulse_slicer_pcm(): Bresser Weather Center 6-in-1, 7-in-1 indoor, soil, new 5-in-1, 3-in-1 wind gauge, Froggit WH6000, Ventus C8488A
bitbuffer:: Number of rows: 1
[00] {275} 55 55 55 55 55 16 ea 6e 6d 88 b1 84 10 8c 7f ff ff 89 ac 4b 84 42 dd d8 29 80 00 00 00 00 00 00 00 00 00

---

time : 2024-11-21 21:11:26
model : Bresser-6in1 id : 11630821
channel : 0 Sensor type: 1 Wind Gust : 0.0 m/s Wind Speed: 0.0 m/s Direction : 135 Rain : 933.2 mm Startup : 1 Flags : 1
Integrity : CRC
Modulation: FSK Freq1 : 868.2 MHz Freq2 : 868.3 MHz
RSSI : -0.1 dB SNR : 31.2 dB Noise : -31.4 dB
pulse_slicer_pcm(): Bresser Weather Center 6-in-1, 7-in-1 indoor, soil, new 5-in-1, 3-in-1 wind gauge, Froggit WH6000, Ventus C8488A
bitbuffer:: Number of rows: 1
[00] {274} 55 55 55 55 55 16 ea 4b 7b 88 b1 84 10 8c 7f ff ff 89 ac 7f b6 66 ff 80 d5 00 00 00 00 00 00 00 00 00 00

---

time : 2024-11-21 21:11:50
model : Bresser-6in1 id : 11630821
channel : 0 Sensor type: 1 Wind Gust : 0.0 m/s Wind Speed: 0.0 m/s Direction : 135 Rain : 933.2 mm Startup : 1 Flags : 1
Integrity : CRC
Modulation: FSK Freq1 : 868.1 MHz Freq2 : 868.3 MHz
RSSI : -0.1 dB SNR : 30.9 dB Noise : -31.0 dB
pulse_slicer_pcm(): Bresser Weather Center 6-in-1, 7-in-1 indoor, soil, new 5-in-1, 3-in-1 wind gauge, Froggit WH6000, Ventus C8488A
bitbuffer:: Number of rows: 1
[00] {274} 55 55 55 55 55 16 ea 4b 7b 88 b1 84 10 8c 7f ff ff 89 ac 7f b6 66 ff 80 d5 00 00 00 00 00 00 00 00 00 00

---

time : 2024-11-21 21:12:02
model : Bresser-6in1 id : 11630821
channel : 0 Battery : 0 Temperature: -3.0 C Humidity : 85 Sensor type: 1 Wind Gust : 0.0 m/s Wind Speed: 0.0 m/s Direction : 135
UV : 44.4 Startup : 1 Flags : 0 Integrity : CRC
Modulation: FSK Freq1 : 868.2 MHz Freq2 : 868.3 MHz
RSSI : -0.1 dB SNR : 29.5 dB Noise : -29.6 dB
pulse_slicer_pcm(): Bresser Weather Center 6-in-1, 7-in-1 indoor, soil, new 5-in-1, 3-in-1 wind gauge, Froggit WH6000, Ventus C8488A
bitbuffer:: Number of rows: 1
[00] {275} 55 55 55 55 55 16 ea 6e 6d 88 b1 84 10 8c 7f ff ff 89 ac 4b 84 42 dd d8 29 80 00 00 00 00 00 00 00 00 00

---

time : 2024-11-21 21:12:14
model : Bresser-6in1 id : 11630821
channel : 0 Sensor type: 1 Wind Gust : 0.0 m/s Wind Speed: 0.0 m/s Direction : 135 Rain : 933.2 mm Startup : 1 Flags : 1
Integrity : CRC
Modulation: FSK Freq1 : 868.2 MHz Freq2 : 868.3 MHz
RSSI : -0.1 dB SNR : 29.7 dB Noise : -29.8 dB
pulse_slicer_pcm(): Bresser Weather Center 6-in-1, 7-in-1 indoor, soil, new 5-in-1, 3-in-1 wind gauge, Froggit WH6000, Ventus C8488A
bitbuffer:: Number of rows: 1
[00] {274} 55 55 55 55 55 16 ea 4b 7b 88 b1 84 10 8c 7f ff ff 89 ac 7f b6 66 ff 80 d5 00 00 00 00 00 00 00 00 00 00
`

The remaining mystery is why the precipitation sometimes explodes to values >66667 (which happened again last night) - my theory is that this occurs when there is rainfall. I will try to gather some codes next time it rains here and post an update here.

[zuckschwerdt]

About rainfall reading: it is a cumulative value since the last battery reset. Daily/hourly/... values are derived by delta to the last interval.

Interesting about too big values with ongoing rainfall. Maybe there is a flag in the high bits, i.e. the actual value is shorter? Try to capture such codes (the 66667 value shown is BCD decoded and not the actual binary).

[zuckschwerdt]

Here is a BitBench with that data.
It looks okay: alternating temp/rain, values as expected, note that very big rain values are actually temp values! So there must be a problem with the decoder. Oh no, are you using an older version of rtl_433 (try rtl_433 -V? This seems a like a bug fixed in April for #2184.

[cvdr]

Indeed I was still running v 22.11. Why is the Raspbian repo still stuck with such old version? Just compiled v 24.10 and assume the issue will be gone. Many thanks for your assistance!

P.S.: But there are two issues left: rtl_433 does not decode any pressure data and there's a static UV value of 44.4 despite the sensor does not sense UV levels.

[zuckschwerdt]

Ambient pressure is a sensor on the display unit and not transmitted.
Not sure how to detect that 444 as an invalid value, it presents as legitimate BCD values.

[cvdr]

Okay. thanks again! Makes sense.

[cvdr]

Could it be that despite the update to 24.10 rtl_433 keeps outputting the buggy readings throught MQTT? Since yesterday, I no longer get the 5-digit rainfall levels in the CLI but as soon as I send the output as MQTT they are back.