Build Instructions

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• 1

  Step 1

  Configure Raspberry Pi:

  1. Load GPIO and DS18B20 modules at boot:
  

  Add w1-gpio and w1-therm to /etc/modules

  2. Install python libs for gpio:
  

  sudo apt-get install python-rpi.gpio

  3. Copy python scripts and web pages:

  https://github.com/james7780/TempMonitor

  test.py in the cgi-bin folder can be used to test the connected temp sensors?

  4. Install and configure "lighttpd" webserver:

  Should work out of the box, as long as you put cgi scripts in /var/www/cgi-bin folder and mark them as executable.

  www.penguintutor.com/linux/light-webserver

  5. Add python script to webserver:

  Copy contents of github repository (URL above) to /var/www

  Update the "sensorID" variable in the readtemp.py script to match your sensor's ID (when you have it, see below).
  

  6. [OPTIONAL] C library installation:
  

  Install wiringPi (for C) - wiringPi.com/download-and-install/

  (This is if you prefer to use C for you CGI "scripts" instead of python)

• 2

  Step 2

  Build patch-panel:

  1. Glue terminal blocks to baseplate

  2. Wire up terminal blocks

  3. Solder 5K resistor between +5V and data terminals

  4. Connect to Raspberry Pi GPIO (+5V, GND and data)

• 3

  Step 3

  Test/identify temperature sensors:

  1. Connect DS18B20 to patch panel

  2. Run test python script to check operation and identify (each DS18B20 has a unique ID)

  2. OR - test DS18B20 temperature probes manually:

  modprobe w1-gpio

  modprobe w1-therm

  cd /sys/bus/w1/devices

  ls

  cd 28-xxxx (DS18B20 serial number)

  cat w1-slave

  3. Label the sensors with their ID's so you know which is which.

  4. Update the "sensorID" variable in the readtemp.py script to match your sensor's ID.

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