1-Wire Sensors

Host Adaptors

• Probably should get the RPI2 host adaptor here for much more reliable communications: http://www.sheepwalkelectronics.co.uk/products-adapters.shtml

Lots of Sensors

• https://www.hw-group.com/sensors

Temperature

The bare components for these are:

• DS18S20 Compatible with old chip. 9 bits only. Not recommended for new applications.
• DS18B20 New chip, 9-12 bits of resolution.
• Ruggedized $8.50
• Ruggedized $10
• DS18B20 for $4.25 https://www.sparkfun.com/products/245
• Ruggedized temperature sensor in standard tube shape $20
• Six temperatures in 1' intervals on a string for $100
• Outdoor / Stainless
  • http://www.hw-group.com/products/sensors/Temp-1Wire_en.html
• 8-thermostat sensor system for WEL: http://welserver.com/support_files/WEL_Combo_Module.pdf
• Inexpensive ($10.00) on a wire: http://www.sheepwalkelectronics.co.uk/SWE0.shtml

Humidity

• From SheepWalk
• CMCIEL

Humidity + Temperature

• Ruggedized hw-group.com
• On a board: http://www.hobby-boards.com/store/products/Humidity%7B47%7DTemp.html
• Inexpensive, $17.50 from pcsensor.com
• IButtonLink $64
• EDS Embedded Data Systems $79.95
• a bunch from HW-Group.com

Light

• $17 one from EDS Embedded Data Systems

Liquid Flow Meters

• Water Flow Sensor YF-S201
• Richard says: I'm pretty sure that (someone) is using this: http://ecatalog.gemssensors.com/ecatalog/flow-sensors/en/173931-C
• http://www.adafruit.com/category/35_106
• Maxim Pulse counter: DS2423 for two flow meters.
• DS2423 on a board from Hobby Boards: http://www.hobby-boards.com/store/products/Dual-Counter.html
• Probably another DS2423 counter, 50 euros, http://www.eservice-online.de/1-Wire-Bus/Digital-Ein-und-Ausgang-Analog-Eingang-Zaehler/1-Wire-Dual-S0-Zaehlermodul.html
• Used in this identical system http://www.oval.co.jp/english/products/eggs_delta_pulse_e.html

Air Flow Meters

• Air flow + temperature for $125

Solar Energy

• Use a DS2438 in a simple circuit like this, which also does temperature http://www.howmuchsnow.com/solar/
• Diagram in this older document: http://www.midondesign.com/Documents/1-WireApplicationGuide103.pdf
• From Maxim: http://para.maximintegrated.com/en/search.mvp?fam=optical_sensors&tree=sensors
• Hobby Boards Combo Board Here's the data you get from it. Read id/S3-R1-A/illuminance

Current

Big how-to page: http://www.nlcpr.com/kwhmonitor.php

1W Clamp Sensors:

• HW Group http://www.hw-group.com/products/sensors/30A-Current-probe-1W-UNI_en.html
• Teracom http://www.teracom.cc/products/tsc200-1-wire-current-sensor/
• iButtonLink http://www.ibuttonlink.com/products/ms-tc Any of these will need to get wired to an A/D interface (see below.)
• Appliance On/Off : http://www.crmagnetics.com/Products/CR-9321-P11.aspx
• Diagram here: http://cocoontech.com/forums/topic/6864-how-to-sense-power-onoff-toggle-via-one-wire/
• DC: Hall Effect Sensors
  • http://ca.mouser.com/Search/Refine.aspx?Keyword=hal&FS=True&N=12538038
  • 5v: http://www.digikey.com/product-detail/en/L01Z600S05/MT7180-ND/529412?cur=USD
• AC: Split-Core Transformers
  • http://www.onsetcomp.com/products/sensors/t-mag-0400-50

A/D

• 8-channel, probably a MAX1138
• Hobby Board 4-channel $105
• Sheepwalk will make 1-channel units for $25
• 4-channel $16 !! based on a DS2450

Controlling Things

• DS2408 8-Channel Relay / 8-Channel on-off sensor monitor: http://www.hobby-boards.com/store/products/8-Channel-I%7B47%7DO-%288-Relay-Version%29.html
• DS2413 2-Channel http://www.sheepwalkelectronics.co.uk/SWE4.shtml

Etc

• Embedded Data Systems has a nice line of "environmental" sensors & digital I/O
• cheap 2-channel digital I/O
• The entire Fuchs shop catalog
• Resistance RTD Thermistor Interface $78
• Display and Controller
• Geiger Counter: http://www.laurinieminen.com/index.php?page=projects&id=owgeiger
• Reading a meter with optical sensor
  • http://www.hekkers.net/domotica/howtomonitorgasusage.aspx
  • http://www.bwired.nl/How_stroom.asp
• Weather Stations
  • http://www.web4robot.com/
  • http://www.txwx.com/1wire_bro1.htm

http://www.sheepwalkelectronics.co.uk/

http://www.hw-group.com/products/sensors/index_en.html