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by N3tguru
Mon Feb 15, 2016 6:18 am
Forum: Automation, sensing and robotics
Topic: Honeywell WV8840 Water Heater Control
Replies: 1
Views: 1602

Honeywell WV8840 Water Heater Control

Just purchased a Rheem water heater at the local big box home improvement center. Some of these are compatible with Rheem's wifi module. The one I purchased is not, BUT it has a COM port! The control module for the gas valve is powered by the thermocouple when the gas pilot light / heater is on. The...
by N3tguru
Wed Sep 16, 2015 1:57 am
Forum: Automation, sensing and robotics
Topic: SolarNetwork: renewable energy management framework
Replies: 15
Views: 5009

Re: SolarNetwork: renewable energy management framework

Check out this thread. I have a Xantrex GT 2.8 reporting to pvoutput.org using a Pi. Its been working for well over 1 year now. viewtopic.php?f=37&t=11955&hilit=xantrex&start=50
by N3tguru
Mon Jun 22, 2015 5:57 am
Forum: Other projects
Topic: Screenly OSE -- Digital Signage for the Raspberry Pi
Replies: 1100
Views: 370183

Re: Screenly OSE -- Digital Signage for the Raspberry Pi

We really like Screenly for our internal screens. We prefer not to expose the screens to the web. Any plans to offer a server for management and content grouping? SAS works for most customers, I understand that. But those who are in a regulated environment would benefit from a strictly internal (non...
by N3tguru
Sun Apr 05, 2015 6:31 pm
Forum: Automation, sensing and robotics
Topic: Photovoltaic/solar systems monitoring
Replies: 124
Views: 70534

Re: Photovoltaic/solar systems monitoring

I just found out that SunPower rebadged Xantrex inverters so my scrips in previous pages in this thread should work with those inverters as well. Look up the Xantrex GT series and if your SunPower inverter looks like it the scripts should work. Ive been logging to PVOutput for over a year now with n...
by N3tguru
Mon Sep 15, 2014 4:12 am
Forum: Automation, sensing and robotics
Topic: Photovoltaic/solar systems monitoring
Replies: 124
Views: 70534

Re: Photovoltaic/solar systems monitoring

If there was a way to import your data on a daily basis to pvoutput.org or other monitoring site as another data point it might get interesting. Pvoutput does do some predictive calc based on location and other factors. Placing regional expected data on the graph would be neat I think.
by N3tguru
Sat Sep 06, 2014 6:51 am
Forum: Automation, sensing and robotics
Topic: Photovoltaic/solar systems monitoring
Replies: 124
Views: 70534

Re: Photovoltaic/solar systems monitoring

I don't get the point of Sunmetrix. Yes it's a predictive engine based on weather data at my location. What else does it do? I hope you took into account the actual impacts of environment on a solar array such as: - Mountains affecting actual sunrise / sunset along seasonal slope variations. - Partl...
by N3tguru
Fri Mar 28, 2014 11:08 pm
Forum: Automation, sensing and robotics
Topic: Photovoltaic/solar systems monitoring
Replies: 124
Views: 70534

Re: Photovoltaic/solar systems monitoring

Ok here's what I did. I modified an example I found on the web. Wish I knew where I found it to give credit (probably this forum somewhere). First set of commands: cd /opt sudo mkdir check_lan sudo nano check_lan.sh Insert this code in the nano text editor. Ctrl-X to save and exit: #!/bin/sh # cron ...
by N3tguru
Wed Mar 26, 2014 5:05 am
Forum: Automation, sensing and robotics
Topic: Photovoltaic/solar systems monitoring
Replies: 124
Views: 70534

Re: Photovoltaic/solar systems monitoring

Ok... I added a script to my Pi so it will reboot itself upon losing network connectivity. I don't think the Pi is locking up, just deciding to stop talking to the world. If anyone is interested I can share the code in another post. I used the code on another project where my fleet of Pi digital sig...
by N3tguru
Mon Mar 17, 2014 5:39 pm
Forum: Automation, sensing and robotics
Topic: Photovoltaic/solar systems monitoring
Replies: 124
Views: 70534

Re: Photovoltaic/solar systems monitoring

Ruth, After removing the cover the Pi it still locked up so I doubt its heat. As far as I know the Ethernet and USB controller are the same chip on the Pi so it could be a driver or buffer issue. I have not tried swapping hardware yet. I have not tried an auto reboot yet. I went ahead and put a time...
by N3tguru
Fri Mar 14, 2014 10:27 pm
Forum: Automation, sensing and robotics
Topic: Photovoltaic/solar systems monitoring
Replies: 124
Views: 70534

Re: Photovoltaic/solar systems monitoring

Anyway, I DID get something out from the controller, but it was either garbage or just something libpowercom did not understand. It looked like the controller did not respond to all requests and there were CRC errors and so on. Also, this could be a power issue with the USB, maybe. Unfortunately, I...
by N3tguru
Fri Mar 14, 2014 10:20 pm
Forum: Automation, sensing and robotics
Topic: Photovoltaic/solar systems monitoring
Replies: 124
Views: 70534

Re: Photovoltaic/solar systems monitoring

I have had issues with the Pi since I implemented the Zigbee adapter, but a little more than just not connecting. Its connected flawlessly, but the Pi does get warm and it locks after about 36 hours of continuous operation. Ive taken the cover off the enclosure to see if it improves. I do not overcl...
by N3tguru
Wed Mar 12, 2014 3:43 pm
Forum: Automation, sensing and robotics
Topic: Photovoltaic/solar systems monitoring
Replies: 124
Views: 70534

Re: Photovoltaic/solar systems monitoring

Let us know how it goes. Hopefully the USB adapter clears it up for you.
by N3tguru
Mon Mar 10, 2014 9:56 pm
Forum: Automation, sensing and robotics
Topic: Photovoltaic/solar systems monitoring
Replies: 124
Views: 70534

Re: Photovoltaic/solar systems monitoring

Sorry.. more goodies. Im looking for a way to do TDS monitoring of a RO unit... found this doc on using the ttyAMA0 port. https://www.atlas-scientific.com/_files ... e_code.pdf
by N3tguru
Mon Mar 10, 2014 9:31 pm
Forum: Automation, sensing and robotics
Topic: Photovoltaic/solar systems monitoring
Replies: 124
Views: 70534

Re: Photovoltaic/solar systems monitoring

Yes, minicom will do the trick. minicom -b 9600 -o -D /dev/ttyAMA0. Try it also with sudo. If its RS232 I have only had luck using a USB to RS232 adapter with the RasPi. It would then obviously show up on ttyUSB0 or ttyUSB1. I had issues with acces to the /dev/ttyusb0 device until I followed the fir...
by N3tguru
Mon Mar 10, 2014 4:57 am
Forum: Automation, sensing and robotics
Topic: Photovoltaic/solar systems monitoring
Replies: 124
Views: 70534

Re: Photovoltaic/solar systems monitoring

Not much info out there on the MPP other than using their own software. There are JBUS docs but that protocol requires a lot of parsing to get meaningful data out of it. Have you hooked up a terminal emulator to see what the output looks like? I wonder if there's a way to 'sniff' the serial port whi...
by N3tguru
Sun Mar 09, 2014 6:32 am
Forum: Automation, sensing and robotics
Topic: Photovoltaic/solar systems monitoring
Replies: 124
Views: 70534

Re: Photovoltaic/solar systems monitoring

$serial_port->write("INV?\r"); ($count, $xantrex_status) = $serial_port->read(255); $serial_port->write("KWHTODAY?\r"); ($count, $xantrex_kwhtoday) = $serial_port->read(255); $serial_port->write("TIME?\r"); ($count, $xantrex_time) = $serial_port->read(255); $serial_port->write("POUT?\r"); ($count, ...
by N3tguru
Thu Mar 06, 2014 6:22 pm
Forum: General discussion
Topic: The $200 RasPi
Replies: 8
Views: 1425

Re: The $200 RasPi

Check out HomeGenie if you want to do some home automation. Its compatible with Z-wave, X10 and all sorts of other stuff out there. I plan on trying it out with Zwave since its much cooler tech than X10.

http://sourceforge.net/projects/homegenie/
by N3tguru
Thu Mar 06, 2014 7:01 am
Forum: Off topic discussion
Topic: autism: what is your score on this quiz?
Replies: 39
Views: 10265

Re: autism: what is your score on this quiz?

Great discussion. I tend to avoid forum discussions on the topic because it's usually people casting doubts on diagnosis or validity of screening etc. I basically took the quiz twice in my head, comparing my PDDNOS son's tendencies and my own.

Thanks for creating the poll!
by N3tguru
Thu Mar 06, 2014 5:47 am
Forum: Automation, sensing and robotics
Topic: Photovoltaic/solar systems monitoring
Replies: 124
Views: 70534

Xantrex 3.0 and Rainforest Raven to PVOutput.org!

I finally got my RPi to push data to pvoutput.org! I have a Xantrex 3 grid tie inverter and a Zigbee dongle (Rainforest Raven) for communication with the smart meter on the house. http://www.pvoutput.org/intraday.jsp?id=28821&sid=26410 The Perl code is based on solar.js.cx code. The site is gone but...
by N3tguru
Thu Mar 06, 2014 5:35 am
Forum: General discussion
Topic: The $200 RasPi
Replies: 8
Views: 1425

The $200 RasPi

I was a little stunned at the sight of a $200 Raspberry Pi. I'm sure they have a bit of investment into their software, but there's no mention on the hardware this device is based on.

http://store.homeseer.com/store/x-P1599.aspx

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