Sunday, January 14, 2018

Happy New Year 2018

Happy New Year 2018, hope it's a better one than last. I have a lot planned but I had a lot planned last year also. Oddly I completed a lot of projects also so I shouldn't look badly on the year.

I've been playing with Splunk and the netflow data from my firewall / router. I missed the expired license period for the trial Enterprise license and ended up with 30 violations before I switched to the free version. The free version fits my needs just fine at the moment. I'm mainly using Splunk for learning. I'm still not sure where to begin. It's very overwhelming. Anyways, once I found the violations, I fixed the license but found I couldn't access my dashboards (my queries). I found I had to let them clear. With 30 violations, had to wait until I had less than 3 violations. But it still didn't work, it complained: "Error in 'litsearch' command: Your Splunk license expired of you have exceeded your license limit too many times'. So despite the fact that I renewed the license to fix the violations, I still had to renew the license to re-enable the search. I did this once the violation count was lower than 3. Actually I waited until it was zero. Now I can see my data again (yeah). So I expect that all the data it pushed during the violation period is still there. Once I figure out how to use Splunk I'll check it.

Wednesday, November 01, 2017

AMG8833 IR Thermal Camera

I tend to be absent minded. I turn on the kettle then step out back with my dogs. I've destroyed several kettles and I am trying my best to not do that. I have gotten much better at not leaving the kettle unattended. But it's always in the back of my mind that it can happen again. So one of the things I want to do is to build a sensor that can monitor the stove, turn off the burners when I've left something on the stove too long and notify me of both. I think I might be able to come up with something using the AMG8833 IR Thermal Camera and an ESP8266. The AMG8833 sensor is pretty expensive (about $40 US) but I'll build it anyway and experiment. A better solution would be to take advantage of a camera and some AI but I'm not certain that a normal camera would be enough. You can't monitor the surrounding temperature with a normal camera. I wonder if you can with an IR based unit? Perhaps a hybrid approach is enough? And then there's the huge question of privacy. Anyway, I'll work with the ESP8266 and the AMG8833 sensor. Then feed it back through MQTT to Node-Red or something else. In the meanwhile I'm also working on a water level monitor, a terminal server and an IR transceiver.