I have 4 xbee S2 in a star combination, 3 end devices and one coordinator. Each end device has one sensor and sends data every hour using ADC pin to the coordinator. All of the Xbees operates from batteries so i want to keep power consumption as low as possible.
I set end devices to cyclic sleep every hour so they can stay awake just a short period to send data.
The major problem is the coordinator, since i cannot set it to sleep. So my questions are:
is there a better way to set up these nodes for low power consumption?
I was thinking of power off the coordinator (using an external circuit) every hour, but what happens if the end device wake up and the coordinator is off? Will it sleep again? Retry the transmition until the coordinator is on? Crash?