I'm using ZigBee Series 2 chips and am sending a simple switch signal using DI3 from the remote set as a router in AT mode to the Coordinator's DO3 (low). The sampling rate is set on the remote, but cannot see it toggle on the Coordinator. In API mode on the Coordinator, I can see the commands for toggling, but regardless of mode can never see DO3 toggle. On the coordinator, I can set the DO3 to HIGH and turn on the LED, so I know it is possible. What am I doing wrong? Also, would like clarity on if the Series 2 Zigbee vs. the 802.15.4 which should be Series 1 radios. Information in the Internet seems to point to the Series 1 as being more common. I chose the Series 2 because it looked like it had a few more benefits. Any problem using Series 2 instead if Series 1? All comments are welcome. Thank you.