I would like to setup an RF mesh network using solar/battery powered devices. The devices wake-up simultaneously and periodically (i.e. every 15 minutes), send data to a single device that also has GPRS connectivity and fall back to sleep.
The problem is that Digimesh, which seems more suitable for the job, runs on series-1 devices only that are not that good in terms of power-efficiency and range. While Zigbee on the other hand, requires that the coordinator never falls to sleep.
Is it something that I miss? Any workaround/hint on the above?
BTW, does anyone has a clue of the time it takes for a Zigbee network (i.e. one coordinator and 10-15 end-nodes) to be ready for sending and receiving data from the moment the coordinator and end-devices are turned on?