There’s a limit of about 20 Zigbee devices that are directly connected to Homey, which means they are not connected to Zigbee router devices in Homey’s Zigbee network.
The limit doesn’t apply to:
- devices using a different protocol (WiFi, Z-Wave, IR, etc)
- devices using a different Zigbee controller (IKEA Tradfri gateway, Philips Hue hub, deCONZ, etc)
So your 26 IKEA lights don’t count, because they are using a different Zigbee network (created by the IKEA hub).
You now have 16 Zigbee devices directly connected to Homey. You haven’t yet reached the limit, but getting close. You should be able to add a few more, but not all 5. I don’t know why you can’t add any more, but I would suggest adding Zigbee router devices to your network to make it most robust. Most Zigbee devices that are permanently powered (lightbulbs, smart sockets, the IKEA repeater) are router devices.
As for the Zigbee rewrite: it’s being worked on. Firmware v5 which contains the rewrite is now being tested by users.
