Tweet-a-watt accuracy?

XBee projects like the adapter, xBee tutorials, tweetawatt/wattcher, etc. from Adafruit

Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.
Locked
lc94114
 
Posts: 3
Joined: Tue May 26, 2009 12:12 am

Tweet-a-watt accuracy?

Post by lc94114 »

Hello,

Am I correct in understanding that the tweet-a-watt is sampling a single datapoint every 2 seconds and that it averages out to something reasonably accurate after 5 minutes of averaging? Does this approach prohibit more granular measurements of usage (say a load that changes every 15-30 seconds)?

Thanks.

User avatar
Franklin97355
 
Posts: 23912
Joined: Mon Apr 21, 2008 2:33 pm

Re: Tweet-a-watt accuracy?

Post by Franklin97355 »

You can rewrite the code to log at any rate you want.

lc94114
 
Posts: 3
Joined: Tue May 26, 2009 12:12 am

Re: Tweet-a-watt accuracy?

Post by lc94114 »

Thanks. I need to take a closer look at the code and will work on it. I noticed with the existing wattcher-maingraph script that I get a very 'noisy' graph compared to a very smooth reading on the actual kill-a-watt device. Hopefully this isn't a result of poor soldering on my part.

Regards.

User avatar
Franklin97355
 
Posts: 23912
Joined: Mon Apr 21, 2008 2:33 pm

Re: Tweet-a-watt accuracy?

Post by Franklin97355 »

That might depend on your scale for the graph. And the kill-a-watt may be averaging in itself.

Locked
Please be positive and constructive with your questions and comments.

Return to “XBee products (discontinued)”