Trying to decode the Thermo-Hygro-Sender 30.3247

[PeterK1961]

Hi,

I try to decode the sensor https://www.tfa-dostmann.de/produkt/thermo-hygro-sender-30-3247/ (placed in my glasshouse) to use the transmitted data in my raspberry based smarthome system. It seems that there is currently no support for this device (Am I really the first one who wants to do it with this sensor?).

Has anybody experience with decoding TFA sensors in general? First analytics shows a data record with a "len : 73" and slightly changing HEX-values. Are there more relevant data records in TFA protocols. Both, temperature and humidity changed during my test, but th changing HEX-values differ to little.

I currently extract the HEX-values with
rtl_433 -f 433.92M -X 'n=TFAflex,m=OOK_PWM,s=284,l=592,r=3856,g=920,t=123,y=0' -M unknown -M msg -M time:unix:usec | grep -E 'len[[:space:]]+: 73'

Any ideas, recommendations, experieces how to continue?

Best regards,

Peter

[zuckschwerdt]

Grab a .cu8 sample and upload here as zip, so we can check timing parameters.

You can add ,bits>=73 to the -X and drop the pipe.

[PeterK1961]

Hi,

thank you for your supprt.
Sample created with
rtl_433 -f 433.92M -s 250k -w sample.cu8 -T 10
Sensor send data approximately 5 seconds after starting the sampling.
sample.zip

The second file was created with
rtl_433 -f 433.92M -X 'n=TFAflex,m=OOK_PWM,s=284,l=592,r=3856,g=920,t=123,y=0,bits>=73' -M unknown -F kv
sampling2.txt

3rd sampling:
rtl_433 -f 433.92M -X 'n=TFAflex,m=OOK_PWM,s=284,l=592,r=3856,g=920,t=123,y=0,bits>=73' -M unknown -F kv | grep codes
sampling3.txt

Let me know, if you need more samlings or if you want me to check things.

Best regards,

Peter

Viele Grüße nach Bremen aus der Nähe von Nürnberg