YOUSHIKO 7-IN-1 YC9391 weather station

[Tatanka Hanhepi]

Hi,

I have a YOUSHIKO 7-IN-1 YC9391 weather station and using rlt_433 (x64 21.12), I have no problem to receive data from 898 Mhz. Here is an example of what I got:

time      : 2022-01-25 11:18:07
model     : Bresser-7in1 id        : 16852
Temperature: 1.7 C       Humidity  : 81            Wind Gust : 1.5 m/s       Wind Speed: 1.5 m/s
Direction : 132          Rain      : 0.2 mm        Light     : 0.000 klx     UV Index  : 0.0           Battery   : 1
Integrity : CRC

Nevertheless, I have two other therm/hydro sensors which came with this station and I do receive data from them on my Youshiko display but until now I was not able to get these data from these two sensors using rtl_433.

Any suggestion are very welcome.

Thanks in advance,

[Christian Z.]

The sensors for the 7-in-1 should be the 6-in-1 type. If you don't get decodes please follow https://triq.org/rtl_433/ANALYZE.html then create an rtl_433 issue at GitHub with some good samples (as zip).

[Tatanka Hanhepi]

Many thanks Christian for your answer. I am agree with you that the sensors is something very similar than the 6-in-1 type and I have no problem at all to get decodes from it.
But I have you additional  "YOUSHIKO YC80 WIRELESS " (TEMPERATURE & HUMIDITY) https://youshiko.co.uk/products/youshiko-yc80-wireless-temperature-humidity-7-channel-sensor-for-weather-station
These sensors are compatible with 7-in-1 and I get the decode on the weather station display. Nevertheless, using rlt-433 datas I decode are all from the 7-in-1. 
My question is how can I try to also decode the datas from this YC80 ? . I already try to move the center frequency oand some others tips I found on the forum but I always get only data from 7-in-1 with rtl_433.

[Christian Z.]

I don't know if the YC80 should work. If you can catch sample files (remove antenna and place a YC80 at 20cm to the receiver to only catch those) then please upload a few as zip file.

[Tatanka Hanhepi]

Just testing now, with the sensors a few cm from the RTL dongle without antenna. 
I get decoding from YC80 sensors :

Found Rafael Micro R820T tuner
Exact sample rate is: 1000000.026491 Hz
[R82XX] PLL not locked!
Sample rate set to 1000000 S/s.
Tuner gain set to Auto.
Tuned to 868.000MHz.
baseband_demod_FM: low pass filter for 1000000 Hz at cutoff 200000 Hz, 5.0 us
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
time      : 2022-01-26 09:25:33
model     : Bresser-6in1 id        : 19700396
channel   : 1            Battery   : 1             Temperature: 21.2 C       Humidity  : 31            Sensor type: 2
UV        : 0.0          Integrity : CRC
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
time      : 2022-01-26 09:26:34
model     : Bresser-6in1 id        : 19700396
channel   : 1            Battery   : 1             Temperature: 20.7 C       Humidity  : 31            Sensor type: 2
UV        : 0.0          Integrity : CRC

So it's working but only when the sensor is near the dongle. If not only information from the 7-1 (which is outside the house) is received .
Any suggestions to proceed testing ?

Thanks in advance.

[Christian Z.]

Perhaps try

-Y autolevel -Y magest -M level -M noise

to increase the sensitivity of the reception and report level values.

[Tatanka Hanhepi]

SDR dongle connected to exterior antenna (144/433 Mhz dual band)

Here are values:

Exact sample rate is: 1000000.026491 Hz
[R82XX] PLL not locked!
Sample rate set to 1000000 S/s.
Tuner gain set to Auto.
Tuned to 868.000MHz.

Estimated noise level is -17.4 dB, adjusting minimum detection level to -14.4 dB

baseband_demod_FM: low pass filter for 1000000 Hz at cutoff 200000 Hz, 5.0 us

Estimated noise level is -19.3 dB, adjusting minimum detection level to -16.3 dB
Estimated noise level is -21.0 dB, adjusting minimum detection level to -18.0 dB
Estimated noise level is -22.5 dB, adjusting minimum detection level to -19.5 dB
Estimated noise level is -23.8 dB, adjusting minimum detection level to -20.8 dB
Estimated noise level is -25.0 dB, adjusting minimum detection level to -22.0 dB
Estimated noise level is -26.8 dB, adjusting minimum detection level to -23.8 dB
Estimated noise level is -28.3 dB, adjusting minimum detection level to -25.3 dB
Estimated noise level is -29.4 dB, adjusting minimum detection level to -26.4 dB
Estimated noise level is -30.5 dB, adjusting minimum detection level to -27.5 dB
Estimated noise level is -31.7 dB, adjusting minimum detection level to -28.7 dB
Estimated noise level is -32.7 dB, adjusting minimum detection level to -29.7 dB
Current noise level -32.6 dB, estimated noise -32.9 dB
Current noise level -32.9 dB, estimated noise -32.9 dB
Current noise level -33.0 dB, estimated noise -32.9 dB

[Christian Z.]

That seems awefully quiet, like there is no signal at all (-36 is the absolute minimum =no antenna).

Did you check with Gqrx, SigDigger, SDRangel or similar?

[Jim Lawrence]

Just a thought.....If I may suggest, you may want to try setting your gain using the -g <gain>  switch.  Some people think a gain over 16.6 doesn't do much.  You just have to play with it.  I've found higher values (over  36.4 or so) raise the noise floor without much enhancement in signal.  So you might want to start with a value like 16.6 and work your way up from there until you find a sweet spot.  Hope that helps!

[Tatanka Hanhepi]

My mistake, I think I misunderstood the first test your asked me, as I done it with the sensor back to its original place.
So here are the result with the sensor near the RTL dongle and tranmitting:

Rime      : 2022-01-27 20:26:03
model     : Bresser-6in1 id        : 19700396
channel   : 1            Battery   : 1             Temperature: 25.1 C       Humidity  : 29            Sensor type: 2
UV        : 0.0          Integrity : CRC
Modulation: FSK          Freq1     : 868.2 MHz     Freq2     : 868.4 MHz
RSSI      : -16.9 dB     SNR       : 16.6 dB       Noise     : -33.6 dB
Current noise level -33.2 dB, estimated noise -33.2 dB
Current noise level -33.2 dB, estimated noise -33.2 dB
Current noise level -33.2 dB, estimated noise -33.2 dB
Current noise level -33.2 dB, estimated noise -33.2 dB
Current noise level -33.2 dB, estimated noise -33.2 dB
Current noise level -33.3 dB, estimated noise -33.2 dB

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

time      : 2022-01-27 20:27:03
model     : Bresser-6in1 id        : 19700396
channel   : 1            Battery   : 1             Temperature: 24.8 C       Humidity  : 29            Sensor type: 2
UV        : 0.0          Integrity : CRC
Modulation: FSK          Freq1     : 868.2 MHz     Freq2     : 868.4 MHz
RSSI      : -17.6 dB     SNR       : 15.8 dB       Noise     : -33.4 dB
Current noise level -33.3 dB, estimated noise -33.3 dB

At the end, I do think understand where it is not working when the sensor is away:

- I am using a vertical 144/433 Mhz antenna which is outside, a few meters above the 7-in-1 sensors, for this reason I do receive data from them.
- The other YC80 is situated in my living room but walls are reinforced concrete, so signal should be in the noise for my outside antenna which is not tuned for 868 Mhz.
- As my weather display, which is situated where I have my computer (and so my RTL dongle) receive without any problem the YC90, I suspect there may have a internal 868 Mhz antenna inside the display.

Conclusion: I must test again but with a dedicated 868 Mhz antenna as the one outside can't dectect in the noise the YC90 data.

Anyway, these tests show that RLT_433 can decode 7-in1  sensors from YOUSHIKO YC9391 weather station and also Youshiko YC90 temp/hum sensors.

Thank you very much for your time trying to help me.