Wireless Security

[Steven57]

I plan on having 4 PIR sensors that only need to send one way to a main board that will communicate with my network computer.
Do I need 4 different freq or can one freq be used with encoding I assume?

Does the Moteino go to sleep and wake up better than an Uno?
Thanks

[Felix]

Hello Steven,
They would all need to be on the same channel/frequency and network ID, but have different node IDs.
You have AES hardware encryption available on these if needed.
Moteinos can achieve very low power if coded properly, micro amp range. An active PIR will take about 65uA in normal mode, and 250uA when tripped.
Sending message is by far the most expensive operation but that only takes a few ms. So you can expect many months of operation from a small Lipo depending how often your Motion sensors are tripping and sending messages.