I would like to build a circuit supplied by a non-rechargeable battery 3V lithium / 350mAh. This circuit must be able to be connected to devices/sensors been connected from the same battery.
All the devices comunicate with the master and maybe some of them or the most percentage can't comunicate with master directly, so for this reason each device must play the role of a trasceiver and a live broadcaster simultaneously.
The whole product wireless and sensor must consumpt not more than 20uA. From the sensor's side there is no problem because it is easy to have < 5uA. The sensor is something that exists and its micro have the appropriate pins to be connected with a USART, SPI or I2C.
Also any time there is a new event in the network because of a sensor or button or anything else, hen the master must know the event as soon as possible (in 10sec max).
I took a look at the ZigBee but as it seems the consupmtion is more than 2mA. I also found an article that compares the ZigBee with another protocol called ANT (from www.nordicsemi.com). Reading I found that ANT consumpts ~50uA rms (~which is a little bit more than my specs, but ok) but lower wireless comunication range.
So guys, if you would be able, I would like to know your ideas and knowings about this issue.
My musts are:
1. low rms current consumption (<50uA and lower if it is possible)
2. Distance 30 - 60 meters
3. Fast receiver enable
4. Wake up on receive
Ok, I know that the ZigBee has open stuck, so it is easy to buid your applycation without wondering about the whole comunication protocol, but unfortunately consumpts enough current.
What can I do???