Folks,
I am looking at implementing a very low cost temperature sensor module (module cost less than 10$)
I wish to install these low cost sensors to sample the temperature and humidity on a highway that has sections 500m long. Along the 500 meters there are poles installed at a distance of 10 meters each one on both the sides of the highway lane.
At the end of the 500m I wish to place a receiver to collect the data from the nodes sampled at lets say 10 minutes each.
The number of nodes would be 500/10*2=100 nodes.
Nodes have very limited battery power and should be powered by a Coin cell battery that should last atleast 2 years.
Can anyone get me started on this . i am not sure if i should consider a mesh network or a star topology. Moreover what protocol should I adopt BTLE or ANT or Zigbee.
I have spent hundreds of dollars buying evaluation kits and am really confused as to what will be the best approach. Any help will be appreciable.
Thanks