Hello OpenMQTTGateway Experts,
I have been using a RTLSDR dongle to let my HA listen to a Bresser 7-in-1 weather station. I wanted to get rid of the RTLSDR and switch to an ESP32 with a CC1011 that I had lying around from a previous project. I tried lots of things with esphome and platform directly - nothing worked. Until I flashed OpenMQTTgateway esp32dev-rtl_433 - where the first thing to happen was my weather station showing up. OpenMQTTgateway rocks! 
But now, having solved one problem, two new problems have emerged.
First, I want to filter the list of devices. Experience shows that an unfiltered rtl_433 will basically pick up any tire pressure sensor on the entire street plus a few home automation things from other people, which just clutter my Home Assistant. I did the filtering for another OpenMQTTGateway I use for BLE sensors. The documentation at RF gateways (RTL_433/RCSwitch/RF/RF2) | Theengs OpenMQTTGateway v1.8.1 seems to hint at the possibility to at least filter by device type for rtl_433, which would already solve my problem. However, it does not actually say how to install such a filter. As an alternative, Iād also be open to compile my gateway with only the three specific decoders for the Bresser device that I need (should be 119, 172, 173). However, so far I could not figure out how to limit the compile to specific decoders using the preprocessor macro switches. What would I need to put to compile with only three decoders? For completeness: I actually copied esp32dev-rtl_433 and added a few macros from the halter rte_433 FSK, as my device uses FSK. This has worked flawlessly - up to this point.
My second problem is that I would like the Device received via OpenMQTTGateway to be the same device in Home Assistant as it was when received via the rtl_433 add-on. I believe that to this end, OpenMQTTGateway should just overwrite the discovery information that was provided by the rtl_433 Auto-Discovery Add-On. However: The HA Addon presented a bunch of topics under homeassistant/sensor/Bresser-7in1-30707 as follows:
Whereas OpenMQTTGateway provides a flat list of topics under
homeassistant/sensor as follows:
Is there a way to coax OpenMQTTGateway into overwriting the old auto discovery topics?
Regards
Damian