Do Yourself a favor: Dont’t follow the tutorials and howtos to hack a Lidl Silvercrest Gateway. After endless hours I gave up. Not working with OpenHAB or Home Assistant. Communication Error.
Since this really isn’t a tutorial nor a solution, I’ve moved it to a more appropriate category.
Maybe it helps to ask for help? My hacked Silvercrest Gateway works like a charm (openHAB with Zigbee binding and socat).