@chris Thank you for the insanely fast response. Is it safe to say then that the Multipurpose Sensor I bought is only Zigbee 3 compatible? I saw this other thread where there’s talk of getting the CC2531 to work with Zigbee 3. Zigbee 3.0 on CC2531 with Z-stack 3.0.1 firmware - #5 by chris Now that more devices might be coming out that use Zigbee 3, do you think you may move to support the newer firmware for the CC2531? Thank you.