Temperature Monitoring

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Revision as of 19:18, 17 December 2012 by Dex (talk | contribs)
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Temperature data from around the space is to be log via Cacti.
Sampling done with DS18S20 1-wire digital thermometer, these can be daisy chained of the other arduino and MQTT devices.
Aim to publish a standard format MQTT message that a script on Holly will decode and push to cacti

Posible Arduino to hook into

Cheap and cheerful thermistor workshop

I have a bag of surplus 47k thermistors (about 500) and I intend to build a number of circuits to measure temperature starting with the very simplest and culminating in a teachable HackSpace project with reasonable accuracy. We will put these devices in fridges, near heat sources, near doors, windows, indoors, outdoors, you name it.

The component:

  VISHAY 
   NTCLE100 Series NTC 47 kOhm ±1.5 % Radial Leaded Standard Precision Thermistor
   Mfr Part#:  NTCLE100E3473JB0
   Packaging : BAG 
   Std Packaging Qty: 500
   Min Order Qty: 1
   As low as:  £0.1751  (GBP)
   In Stock:  No
   Type: 
   NTC
   Resistance: 
   47 kO
   Tolerance (%): 
   ±1.5 %
   B-constant: 
   4090 °K
   Temperature Range: 
   -40 to +125 °C

Some Google digging reveals...

The simplest circuits and Arduino code...

Michael Erskine 06:43, 14 December 2011 (EST)


Old Notes

  • Temp sensors dotted around space
  • Nanode again
  • Small wireless units or daisy chain of dalas one wires?
  • Humidity sensor's?
  • Push to cacti
  • Query from irc