RPI-RF-MOD Sniffer?

Setup, Configuration and Use Beginners
1
  • Platform information:
    • Hardware: CPUArchitecture/RAM/storage RaspBerry PI B 3+
    • OS: what OS is used and which version Raspbian, latest
    • Java Runtime Environment: which java platform is used and what version Zulu 11
    • openHAB version:

I have attached a RPI-RF-MOD (“Charly”) Module to a Raspberry Pi B 3+. It seems to work (lamp is steady on blue). I have also set up openHAB there and selected the RPI-RF-MOD.

I now want to sniff the codes from an old GT-7000 remote control (433 MHz), as is exemplified here: Mit dem Raspberry Pi und OpenHAB Funksteckdosen (433 MHz) schalten

It does not work, however. Maybe that sniffer does not support the said module.
Is there some software and setup which can read out such modules in the configuration above?

Thanks in advance
W