I'd like to use a Raspberry Pi (or similar) to collect temperature data on water pipes as the water moves through. So the sample rate would be fairly quick, averaged, and then given at maybe a one-second rate. As for a sensor, either a thermistor or a temp IC.
Ideally I'd like to monitor several locations spread out across approximately fifty-feet in various directions. I'm having difficulty coming up with a solution that is: cost effective, one cable with all the sensors in series instead of a separate cable from each sensor back to the Pi, and a method of getting DC (or AC) power to each sensor.
I've looked at an I2C bus, but got caught with getting power to each board, and also not having to make separate PCBs for each location I wish to monitor.
Any ideas would be greatly appreciated.