A working JSA photonics specific gravity sensor arrived the other day and I took it out for a test drive over the weekend. All looks very promising:
http://www.casanogaldelasbrujas.com/blog/2011/01/31/sg-data-logger-first-steps/As soon as nuelectronics return from holiday, I'll add a display and the datalogger shield and my existing GPRS shield. Then program that little beauty to log SG readings every 10 mins, upload them to pachube once a week (or more frequently depending on my data charges). That'll be the base functionality, then it would be quick and easy to add some nice features:
- Send SMS or email if SG dips dangerously low
- Control the generator.
One of the potential benefits of SG based generator control is that it could monitor SG and if it doesn't change over a 2 hour period, then assume that charging is done. Will have to do more testing before I let it control the generator though!
