Search found 9 matches

by jamesee
Sun Mar 01, 2015 1:51 pm
Forum: Developers Sandbox - Meter Data
Topic: Here is how I am calculating crc16
Replies: 8
Views: 16836

Re: Here is how I am calculating crc16

Hi rschramm I am not using the MODBUS protocol directly. My meters are connected to the EKM iSerial device(s) which are in turn connected to my LAN, so the communications implemented in my application are TCP/IP. As to the meter read requests, these are modelled on jameson's protocols documented els...
by jamesee
Wed Aug 27, 2014 9:27 pm
Forum: Developers Sandbox - Meter Data
Topic: Here is how I am calculating crc16
Replies: 8
Views: 16836

Re: Here is how I am calculating crc16

Hi Jameson I'm sorry this is giving you so much trouble. I checked that the latest version of Xojo, which I am using will work on your OS. It should be OK back to OS X 10.7 so that's not the problem. I think DropBox may be causing our problem, so I'll try something a bit different. This gives the ap...
by jamesee
Mon Aug 25, 2014 2:06 pm
Forum: Developers Sandbox - Meter Data
Topic: Here is how I am calculating crc16
Replies: 8
Views: 16836

Re: Here is how I am calculating crc16

Hi Jameson You shouldn't need any Xojo or RB software. This is an application file/package so you should be able to just put it on your Mac and double-click to launch it. (I think you can also launch it by double-clicking on the Omnimeter file in the Mac OS folder - but that's a rather round about w...
by jamesee
Sun Aug 24, 2014 10:51 pm
Forum: Developers Sandbox - Meter Data
Topic: Here is how I am calculating crc16
Replies: 8
Views: 16836

Re: Here is how I am calculating crc16

Hi Jameson Thanks for the encouraging words. I've been using Xojo and its predecessor REALbasic for a number of years. I have developed a variety of applications including database apps. The multi-platform capability is a big plus. Here's a link to a little demo app that you might like to try. [Link...
by jamesee
Mon Aug 18, 2014 10:44 pm
Forum: Developers Sandbox - Meter Data
Topic: Here is how I am calculating crc16
Replies: 8
Views: 16836

Here is how I am calculating crc16

After reading all the posts here, I thought I'd do a bit more research on the crc16 used by EKM. The code that follows is a function that I wrote for the Xojo development environment http://www.xojo.com which I am using to create the applications for managing my meters - and eventually my home heati...
by jamesee
Mon Apr 28, 2014 10:27 pm
Forum: Developers Sandbox - Meter Data
Topic: How to detect/measure reverse energy flows
Replies: 7
Views: 31351

Re: How to detect/measure reverse energy flows

Thank BlueHornet I agree with you, at least on pragmatic grounds. If EKM Metering were to modify the v3 meter as I am suggesting, they would want to leave the existing parsing arrangement in place, in order to achieve backward compatibility with existing applications and software. Thus the only plac...
by jamesee
Thu Apr 24, 2014 2:54 pm
Forum: Developers Sandbox - Meter Data
Topic: How to detect/measure reverse energy flows
Replies: 7
Views: 31351

Re: How to detect/measure reverse energy flows

Thanks Jameson I follow you quite clearly thanks. My situation is a bit more complex as I am on a rural property with separate sub boards in the house and a barn. The utility meter is about 200m from the house and barn. Envisage a T-shape for the sub-main which links the utility meter board (base of...
by jamesee
Wed Apr 23, 2014 9:00 pm
Forum: Developers Sandbox - Meter Data
Topic: How to detect/measure reverse energy flows
Replies: 7
Views: 31351

Re: How to detect/measure reverse energy flows

Thanks Jameson That's very helpful. I obviously should have studied the spec for the v.4 meter. :o I was put off from doing so on account of the "Pulse" part of the name - which made me think that this was only for pulse metering systems, which don't really interest me. My bench testing is...
by jamesee
Tue Apr 22, 2014 12:50 am
Forum: Developers Sandbox - Meter Data
Topic: How to detect/measure reverse energy flows
Replies: 7
Views: 31351

How to detect/measure reverse energy flows

I have purchased two Omnimeter I v.3s to use in a home PV solar electricity system for load and generation management on a three-phase system. I have just set up one of the meters on a test bed to make sure I can get it working and interrogate and read the meter over my home LAN. That part all went ...