I've mostly designed systems with onboard sensors or used wireless.
How would I go about getting 100 temp sensors spread over 200 meters to talk to a host which polls them. The goal is minimum cost. Cheap cable and minimum amount. The sensors will outdoors.
Things I considered
RS485 - old and limited to 32 devices
CAN bus - didn't see a reason why not
Both these have 2 wires so I considered using twisted pair cable with data on 1 pair and power on the other.
Thoughts?
How would I go about getting 100 temp sensors spread over 200 meters to talk to a host which polls them. The goal is minimum cost. Cheap cable and minimum amount. The sensors will outdoors.
Things I considered
RS485 - old and limited to 32 devices
CAN bus - didn't see a reason why not
Both these have 2 wires so I considered using twisted pair cable with data on 1 pair and power on the other.
Thoughts?