2

I'm looking for some digital sensors, (temperature, pressure, lux, humidity), that I can run for a long distance, (80m).

The onewire temperature DS18B20 sensor looks good, (https://www.adafruit.com/product/381), but I couldn't find much else.

Does anyone know of onewire equivalents for the above sensor types and preferably cheaper temperature sensors as I need to purchase 20!

SeanJ
  • 309
  • 2
  • 11
  • 1
    Do you have a budget? And are those the only four measurements you want the sensor to take? – Adam May 21 '16 at 00:58
  • @Adam they are the only measurement but will not be taken from the same source, e.g lux corridor lighting, temp of office room, etc. – SeanJ May 22 '16 at 14:54
  • You will have a hard time finding anything inexpensive off the shelf that will handle that distance without an intermediate board to perform logical and electrical translation to a scheme suitable for distance. It might be as practical to look for a low cost RS485 MCU board that could host and proxy for various I2C peripherals. – Chris Stratton Jun 06 '16 at 18:04
  • @ChrisStratton Could you recommend any such boards? – SeanJ Jun 10 '16 at 19:22
  • 1
    I'm not sure what is available off the shelf (and that would be an off-topic sourcing question anyway), but if you put a little ARM Cortex M0 or ATmega on a simple board with an RS485 transceiver that should give you a generic starting point, and you can save costs by making a half dozen identical boards that can handle different sensors. If you were clever, you might make the board have breadboard compatible headers, but also give it footprints to host a few different surface mount sensors of interest. – Chris Stratton Jun 10 '16 at 19:29

0 Answers0