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)

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)

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.

[TODO] Test flow sensors:

1. Connect flow sensors to GPIO (which???)

2. Run test python script and blow thru sensors

3. Output should change

4. Can also test/calibrate flow sensors using bucket of water and 2L coke bottle

Test system:

1. Use a web browser to browse to the raspberry Pi's IP address from another computer (or phone or tablet).

2. After a few seconds the status page should be displayed with the current temperature and flow rate values.

3. If it fails, try adding "/cgi-bin/readtemp.py" to the URL.