Bit late, but I'm plugging this Zigbee2MQTT thing I came up with and it does appear to work for my IKEA devices. It's probably not exactly the answer you were looking for, but it is an answer. 
Bit late, but I'm plugging this Zigbee2MQTT thing I came up with and it does appear to work for my IKEA devices. It's probably not exactly the answer you were looking for, but it is an answer.