I already use the XBEE S1 and S2 module in my product, I'm migrating to XBEE3.
With the XBEE S1 / S2 modules, everything works fine.
In XBEE3 with the UART firmware 802.15.4, either it works for a while and stops, or when you turn it off and on again it stops working. Are there configurations that can solve this problem?