I have XB3-24Z8ST flashed with Digi XBee3 Zigbee 3.0 TH 100B firmware.
The coordinator is connected to SBC with internet access while the router is connected to SBC without internet access. The SBC with coordinator is synchronized to NTP. How to sync the time across XBee3 module?
As far as I am aware, you would need to send the data across the XBee network. You will also need to account for the time it takes the data to get thru the network.