Comments on: Power monitoring with CurrentCost http://www.killswtch.net/2009/01/03/power-monitoring-with-currentcost/ A geek's thoughts on various stuff Sat, 07 Jan 2012 10:05:40 +0000 hourly 1 By: killswtch http://www.killswtch.net/2009/01/03/power-monitoring-with-currentcost/comment-page-1/#comment-12699 killswtch Fri, 06 Mar 2009 18:21:09 +0000 http://www.killswtch.net/?p=341#comment-12699 I strongly suspect that it only works with 240V/50Hz supplies, since it has to make the assumption that it's working with that voltage and ferquency in order to guess the power (it only measures current). I'm pretty sure there are similar devices for 110V/60Hz supplies though, and there are more expensive devices which are more accurate which measure current, voltage and frequency. I strongly suspect that it only works with 240V/50Hz supplies, since it has to make the assumption that it’s working with that voltage and ferquency in order to guess the power (it only measures current). I’m pretty sure there are similar devices for 110V/60Hz supplies though, and there are more expensive devices which are more accurate which measure current, voltage and frequency.

]]> By: Daniel http://www.killswtch.net/2009/01/03/power-monitoring-with-currentcost/comment-page-1/#comment-12672 Daniel Fri, 06 Mar 2009 02:50:50 +0000 http://www.killswtch.net/?p=341#comment-12672 Is the CurrentCost specific to 220v or can it be used for 110v? Is the CurrentCost specific to 220v or can it be used for 110v?

]]> By: killswtch http://www.killswtch.net/2009/01/03/power-monitoring-with-currentcost/comment-page-1/#comment-12412 killswtch Fri, 27 Feb 2009 17:40:27 +0000 http://www.killswtch.net/?p=341#comment-12412 The code above includes the reference to the USB port. However, depending on what other serial-based devices you have connected to your system, the port reference may change. In my case it's /dev/ttyUSB1 If you do `ls /dev/ttyUSB*` you will see what serial USB devices are registered on the system. If you're lucky you will just have ttyUSB0, in which case subsitute "ttyUSB1" in my code for "ttyUSB0". If you have others you may have to use trial and error, or something like `lsusb` to figure out which one is the correct one. The code above includes the reference to the USB port. However, depending on what other serial-based devices you have connected to your system, the port reference may change. In my case it’s /dev/ttyUSB1

If you do `ls /dev/ttyUSB*` you will see what serial USB devices are registered on the system. If you’re lucky you will just have ttyUSB0, in which case subsitute “ttyUSB1″ in my code for “ttyUSB0″. If you have others you may have to use trial and error, or something like `lsusb` to figure out which one is the correct one.

]]> By: Mark Gardner http://www.killswtch.net/2009/01/03/power-monitoring-with-currentcost/comment-page-1/#comment-12405 Mark Gardner Fri, 27 Feb 2009 14:21:56 +0000 http://www.killswtch.net/?p=341#comment-12405 Hello,

I’ve very new to this! CC128 arrived today, and I’m a Perl virgin. Is the script you post above the one you use for USB conncetivity? You mention “Note that because I’m connecting via a USB port, the serial port name is different.” What should the port name be for a USB connection?

TIA!
Mark

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