I currently have a Sonoff WiFi to 433 MHz hub I modified and downloaded new firmware to. It’s working fine but I had a scare the other day that I thought it broke (it’s fine now, lost power to outlet). So my concern is to start to get a backup to it, preferably one that’s easier to configure/autodiscoverable - however, i doubt that due to the way the sensors work. I have a bunch of 433MHz door alarm sensors and flood sensors on it. They were cheap, they work and are reliable. However, if I lose that hub I don’t think those are easy to get anymore.
I HAS to be WiFi/Ethernet and not a USB plugin because I’m using a VM home assistant and it just doesn’t ever play nice with USB passthru.
Alternatively, there is a custom component that can be added to ESPHome if you don’t want to use MQTT, need both receive and transmit, or just prefer ESPHome. However, I don’t have any direct experience with the custom component.
The black one is impossible to find anywhere, but the white one can still be bought.
The white one can not be flashed with Portisch, but it might not be needed either. It depends on the devices you use.
If the devices is using a protocol that is not understood by the white Sonoff, then it can be set up to not handle the signal interpretation on the device, but send it all raw to HA, which can then handle it instead.
The Sonoff RF bridge is pretty cheap, so if you can spare the few bucks for it, then buy one and test it.