Hardware suggestion

[jaal2001]

Hi, as my testing with a ttgo approach did not work out, I would like to use a SDR module.
Any hardware suggestions, which can be used with Proxmox? My watermeter is based on 868Mhz (Brand Apator). As far as I can see, the Apator Ultrimis Series is not supported so far here, but as long as I do receive data, I am willing to participate :-)
Thanks
J