Years ago I replaced my IKEA TRÅDFRI gateway with a Rasbperry Pi with a Raspbee, running deCONZ. It allowed me to mix and match ZigBee devices from various brands and make flexible configurations. Plus the integration with Home Assistant is superb.

However, one thing I lost is the ability for the IKEA remote to control my lights directly when the deCONZ gateway is down, which was possible back when I used the IKEA gateway. Depending on who you ask, this is either not possible at all or should be taken care of automatically be deCONZ when you set up the remote. The latter didn’t work for me and it took me quite a few attempts to figure out how to set up the pairing manually.

If your Wi-Fi network is on channel 12 or 13, change the regulatory domain of your wireless networking driver to make the Raspberry PI 3B see it.