Idea for Temperature Monitoring App

Answers

• Stacy Olivas

  March 2013 Vote Up1Vote Down

  Ok, the URL I had used above, taken from the original post, will no longer work.  You will need to change the line in the script that pulls the JSON data to:

  
  

  /usr/local/bin/wget -o /tmp/log.txt --quiet -O /tmp/temp.txt --load-cookies cookies.txt --no-check-certificate https://twine.supermechanical.com/<twineID>/rt?cached=1

  
  

  In the past few days, the old URL stopped working and will now return an error.  This new URL makes sense, since it seems to conform to the URL for pulling anything else down for your twine.

  
  

  So, the script should now read:

  
  

  #!/bin/sh

  /usr/local/bin/wget -o /tmp/log.txt --quiet -O /tmp/temp.txt --keep-session-cookies --save-cookies cookies.txt --no-check-certificate --post-data="email=<email>&password=<password>"https://twine.supermechanical.com/login

  /usr/local/bin/wget -o /tmp/log.txt --quiet -O /tmp/temp.txt --load-cookies cookies.txt --no-check-certificate https://twine.supermechanical.com/<twineID>/rt?cached=1

  
  

  TEMP=`cat /tmp/temp.txt | awk -F"," '{print $7}' | awk -F"]" '{print $1}' | tr -d ' '`

  
  

  #first two digits of the temp are stored in T1

  T1=`echo $TEMP | cut -c1-2`

  
  

  #uncomment have the 3rd and 4th digits of the temp stored in T2

  #T2=`echo $TEMP | cut -c3-4`

  #this will format the temp as XX.YY

  #TEMP2=`echo $T1.$T2`

  
  

  TEMP2=`echo $T1`

  
  

  #replace with your own ThingSpeak API key and field that you want the temperature stored at.

  TSDATA="http://api.thingspeak.com/update?key=<API KEY>&field1=$TEMP2"

  
  

  /usr/local/bin/wget --quiet -O /tmp/temp.txt $TSDATA

  
  

  
  

  -Stacy
• Thomas Murray

  December 2012 Vote Up0Vote Down

  Great idea. Would be very useful.
• Gary Rowe

  February 2013 Vote Up0Vote Down

  This is awesome. But really sorry to sound stupid but do you put twine.sh on a server online and just get the twine to HTTP request the url?
  
• Stacy Olivas

  February 2013 edited February 2013 Vote Up0Vote Down

  Gary, you can put it on a server anywhere in the world.  The twine
  doesn't do anything with the script, it only reports the temperature to
  the Supermechanical.com site.  The script is run via a cron job and scrapes the twine's status and
  then uploads the information to the Thingspeak.com channel you setup. 
  Using the trigger mechanism of the apps, Thingspeak.com takes care of
  the sending the temp notifications via airgramapp.
  
  
  Phil, your
  twine id is that large string that appears in the URL of your browser
  when you visit twine.supermechanical.com and select your twine.  (It
  would show up where <twineID> is in the below URL).
  
  https://twine.supermechanical.com/<twineID>/ruleset
  
  
  
  
  
• Gary Rowe

  February 2013 Vote Up0Vote Down

  I think I missed the bit about my Twines ID. Oops.
  
  Will try again.
  
  Stacy, what rule do you have set specifically. For the Twine to trigger the HTTP request of the .sh script?
  
  I'm struggling to get my Twine to want to apply a rule for any more than 1 instance and that is when it's powered on.
  
  I now have it USB powered with no batteries to be constant with your tweaked code.
• Will Luke

  February 2013 Vote Up0Vote Down

  Stacy - thanks for the script. Works beautifully. I've tweaked it to support two Twines, and also convert the temperatures to celsius:

  
  

  temp3=$(echo "scale=2;(5/9)*($T1-32)"|bc)

  
  

  Gary, this isn't rule-based. What Stacy's script does is call a 'hidden' URL, read a JSON packet, and grab the temperature from it. This URL may or may not be supported by Supermechanical in the future though...

  
  

  Will
• Stacy Olivas

  July 2013 Vote Up0Vote Down

  For those who have a Vera 3 from MiCasaVerde, I just created a plugin for the unit that will poll the twine.  It saves the values in variables that can be retrieved later, and you can also request for a value to be returned when the polling function returns.
  
  See here for info:
  
  http://forum.micasaverde.com/index.php/topic,15617.0.html
  
  
  
• Matthias Luger

  July 2015 Vote Up0Vote Down

  URL https://twine.supermechanical.com/rt/<twineID>?cached=1 seems not to work any longer.
  anybody got a clue how to adapt the above script?
  
  regards,
  matthias
  
• Phil Tomson

  February 2013 edited February 2013 Vote Up-1Vote Down

  question about this part of the script:

  
  

  /usr/local/bin/wget -o /tmp/log.txt --quiet -O /tmp/temp.txt --load-cookies cookies.txt --no-check-certificatehttps://twine.supermechanical.com/rt/<twineID>?cached=1

  
  

  What is my twineID?  Is it the name given to the twine?  In my case I just called it 'Phil's Twine' - is that problematic because of the space in the name?

  
  

  Edit:  I tried this as the URL:

  https://twine.supermechanical.com/rt/Phil%27%20Twine?cached=1

  ...but that gets a page not found.  So I'm guessing that the <twineID> is a number.