I am trying to put together a sensor network with a 500m radius.
One base unit with 4-6 sensor nodes.
This is all straight forward, but I need some advice on getting trigger events to base in as little time as possible and would like to avoid typical pitfalls when it comes to latency.
I currently have Pro 900HP modules, but I think the Series 1 802.15.4 modules would be a cheaper solution.
The amount of data would be minimal as I only need to communicate a triggered event.
Any advice on product selection and or methodology welcome.