Okay this means the OSPi is the one throwing the error:
[Mon Jun 24 21:43:13 2013] [error] [client 192.168.1.113] PHP Warning: file_get_contents(http://192.168.1.131:8080/cv?pw=opendoor&en=0): failed to open stream: HTTP request failed! HTTP/1.1 500 Internal Server Errorrn in /var/www/sprinklers/main.php on line 372, referer: http://192.168.1.127/sprinklers/index.php
I read you updated but I am suspicious something went awry in your upgrade to the latest OSPi because the internal server error 500 means the OSPi is looking for something and not finding it. I can tell you precisely what is going on with your OSPi logs, but without them I would ask you to delete the current Python files and update to the latest, once again. If you open ospi.py what does the second line say? It should read:
Edit: I just tested the latest copy straight from Ray’s Github and can confirm it is working great. Let me know what the second line says and we can proceed from there.