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by jets
Sat May 07, 2016 2:17 pm
Forum: Advanced users
Topic: Read solar charger through RS232 (MPP solar PCM-6048)
Replies: 2
Views: 2562

Re: Read solar charger through RS232 (MPP solar PCM-6048)

Northland wrote:Any luck?
I have a pip-4048ms
Unfortunately no luck. I eventually gave up as I did not find any information.
by jets
Fri Mar 14, 2014 12:17 pm
Forum: Automation, sensing and robotics
Topic: Photovoltaic/solar systems monitoring
Replies: 124
Views: 76656

Re: Photovoltaic/solar systems monitoring

Well, I got to test it yesterday shortly, but I did not have much luck. With USB-RS232 adapter with two ports, which did come to be either ttyUSB0 and ttyUSB1 OR ttyUSB2 and ttyUSB3 depending on how the Linux decided to have them. The USB 3g Dongle apparently became also ttyUSBsomething :) Ok, I was...
by jets
Wed Mar 12, 2014 6:07 pm
Forum: Automation, sensing and robotics
Topic: Photovoltaic/solar systems monitoring
Replies: 124
Views: 76656

Re: Photovoltaic/solar systems monitoring

Let us know how it goes. Hopefully the USB adapter clears it up for you. I will get back here when I know. I hope I can install the USB-RS232 adapter tomorrow, as I need to visit my cabin. I tested the adapter at home with another Raspberry Pi and it works fine. One thing is that my controller migh...
by jets
Tue Mar 11, 2014 7:17 am
Forum: Automation, sensing and robotics
Topic: Photovoltaic/solar systems monitoring
Replies: 124
Views: 76656

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 fi...
by jets
Mon Mar 10, 2014 12:43 pm
Forum: Automation, sensing and robotics
Topic: Photovoltaic/solar systems monitoring
Replies: 124
Views: 76656

Re: Photovoltaic/solar systems monitoring

I am going somewhere with this. The SunnyRoo device's protocol looks almost identical. I just go the libpowercom that should work with it, but so far no luck. I have not yet found any other software to work with Sunny Roo. And looks like PV Bean Counter is no longer available for Linux.. Maybe someo...
by jets
Mon Mar 10, 2014 9:31 am
Forum: Automation, sensing and robotics
Topic: Photovoltaic/solar systems monitoring
Replies: 124
Views: 76656

Re: Photovoltaic/solar systems monitoring

Hmm. Even though this is more going towards off-topic.. I suspect that my /dev/ttyAMA0 is not working properly. As if I do: python -m serial.tools.list_ports It lists only ttyUSB0 and ttyUSB1 I have 3g dongle there, which the ttyUSB's are related, I guess. How do I make sure my ttyAMA0 is working pr...
by jets
Mon Mar 10, 2014 7:02 am
Forum: Automation, sensing and robotics
Topic: Photovoltaic/solar systems monitoring
Replies: 124
Views: 76656

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 wh...
by jets
Sat Mar 08, 2014 5:57 pm
Forum: Automation, sensing and robotics
Topic: Photovoltaic/solar systems monitoring
Replies: 124
Views: 76656

Re: Photovoltaic/solar systems monitoring

I am willing to try anything, so far nothing has worked with my MPP Solar PCM-6048 Solar Charge Controller, the interface is RS232 :( Apparently it uses "Helios Inverter Protocol" and protocol specs also mention J-BUS, which again maybe is pretty much same as MODBUS.. All help would be highly apprec...
by jets
Tue Mar 04, 2014 9:46 am
Forum: Automation, sensing and robotics
Topic: Photovoltaic/solar systems monitoring
Replies: 124
Views: 76656

Re: Photovoltaic/solar systems monitoring

Hi, You are lucky because fronius inverters are already supported very well. Right now the probe extracts the following info: power, currentAC, currentDC, voltageAC, voltageDC, frequencyAC, Phase1Current, Phase2Current, Phase3Current, Phase1Voltage, Phase2Voltage, Phase3Voltage, DailyEnergy, TotalE...
by jets
Sat Jan 11, 2014 8:38 pm
Forum: Automation, sensing and robotics
Topic: PiHAT - Rasberry Pi Home Automation Transmitter
Replies: 194
Views: 84722

Re: PiHAT - Rasberry Pi Home Automation Transmitter

Hmm. Actually I was thought that the wavelength is calculated by dividing 300 with the Mhz of the RF. But then again we need to consider what is the speed factor of cable/what ever is delivering the RF signal.. So I believe I will try 17.283 .. in real life 17.28-9 cm length. Without any speficic "g...
by jets
Sat Jan 11, 2014 4:21 pm
Forum: Automation, sensing and robotics
Topic: PiHAT - Rasberry Pi Home Automation Transmitter
Replies: 194
Views: 84722

Re: PiHAT - Rasberry Pi Home Automation Transmitter

Actually longer is not better antennas are only optimal at a limited frequency range although at lower frequencies like 88 - 108MHz this is not so critical. For pure 433.92MHz broadcasts the correct length of a quarter wave dipole is 16cm or 6.3 inches - http://wb5mrn.com/ham/antenna.htm Richard S....
by jets
Sat Jan 11, 2014 12:38 am
Forum: Automation, sensing and robotics
Topic: PiHAT - Rasberry Pi Home Automation Transmitter
Replies: 194
Views: 84722

Re: PiHAT - Rasberry Pi Home Automation Transmitter

I have been quite successful with PiHat and 433Mhz RF transmitter and receiver. However, it is not very reliable. What would you consider as a best antenna for this? At the moment I am using just a unknown length piece of wire. As I am radio amateur, more like "retired 20 years ago" - ham, I calcula...
by jets
Sat Dec 14, 2013 6:06 pm
Forum: Advanced users
Topic: How much power can Rpi throughput to USB?
Replies: 6
Views: 2738

Re: How much power can Rpi throughput to USB?

But is it 750mA tops per USB or both USB's RPi has together? I will now consider on some sort of USB-divider to power up a USB hub, which would then power and have all other stuff. It is 750mA total including the Pi itself, both USB ports, and any GPIO pins used. In practice you can get about 100mA...
by jets
Sat Dec 14, 2013 5:51 pm
Forum: Advanced users
Topic: How much power can Rpi throughput to USB?
Replies: 6
Views: 2738

Re: How much power can Rpi throughput to USB?

It doesn't matter if you have 100Amps powering the Pi there is a polyfuse (F3) that limits current consumption to roughly 750mA tops. If you need to connect power hungry devices like USB hard drives then an externally powered USB hub is highly recommended. Richard S. Aha. Thanks. But is it 750mA to...
by jets
Sat Dec 14, 2013 5:26 pm
Forum: Advanced users
Topic: How much power can Rpi throughput to USB?
Replies: 6
Views: 2738

How much power can Rpi throughput to USB?

I was sure this has been dealt and written a lot in forums, but either I was not good enough googler or something else. I have a 3A power supply powering the Rpi. Of course, the 3A is plenty for Rpi. However, I am wondering, if I could power 3G Dongle and some other stuff from Rpi USB-ports? I mean,...
by jets
Fri Dec 13, 2013 8:58 pm
Forum: Automation, sensing and robotics
Topic: Photovoltaic/solar systems monitoring
Replies: 124
Views: 76656

Re: Photovoltaic/solar systems monitoring

Hey Instattim, looks like a great work! However, I am using different brand, but hope to utilize your work. Does the Outback use MODBUS/JBUS?

My MPPT PCM-6048 uses JBUS, which I think is pretty much equivalent to MODBUS.

What speeds are you using? Are you connecting by RS232 or something else?
by jets
Thu Dec 12, 2013 3:52 pm
Forum: Media centres
Topic: Raspbmc .Avi no video - sound only
Replies: 7
Views: 5811

Re: Raspbmc .Avi no video - sound only

jamesh wrote:Second file that also fails (not straight away) was mpeg4 though...although that sound like a different problem.
Well, I will try to convert that as well, if it would make it playable..
by jets
Thu Dec 12, 2013 3:52 pm
Forum: Media centres
Topic: Raspbmc .Avi no video - sound only
Replies: 7
Views: 5811

Re: Raspbmc .Avi no video - sound only

Yes, I believe so, as other files play well. However, I am now exploring on converting these files to H264. Apparently Raspbmc has some trouble with msmpeg4.. msmpeg4 is not mpeg4 compliant. We (or any hardware codec) won't play it. Aha. Thanks, good to know. If the conversion to h264 works well, I...
by jets
Thu Dec 12, 2013 2:25 pm
Forum: Media centres
Topic: Raspbmc .Avi no video - sound only
Replies: 7
Views: 5811

Re: Raspbmc .Avi no video - sound only

Yes, I believe so, as other files play well. However, I am now exploring on converting these files to H264. Apparently Raspbmc has some trouble with msmpeg4..
by jets
Thu Dec 12, 2013 1:00 pm
Forum: Media centres
Topic: Raspbmc .Avi no video - sound only
Replies: 7
Views: 5811

Raspbmc .Avi no video - sound only

I am experiencing problems when trying to play some .avi-files. I have tried to play them both locally and via network. I also have acquired the licenses for both MPEG2 and VC1. I get only sound, no video. Raspbmc does produce a preview thumbnail (or whatever it is called). I get this error in the x...
by jets
Wed Dec 11, 2013 1:52 pm
Forum: Automation, sensing and robotics
Topic: DS18B20 reading 85°C
Replies: 26
Views: 40929

Re: DS18B20 reading 85°C

Well, I had similar problem. The 1820 gives temperature 85 in case there is some sort of communication failure. How long is your cable? Check that you have connected correct pins correctly etc. I use 1-wire master though. I had the 85 degree problem with poor cables and poor connections while testin...
by jets
Fri Nov 22, 2013 9:31 pm
Forum: General discussion
Topic: Is this good 12V power source for Pi?
Replies: 6
Views: 7102

Re: Is this good 12V power source for Pi?

I power the PI through the gpio pins bypassing the polyfuse so full current is available to the usb ports, I put an inline 2A fuse in the wiring to the PI. I have used many usb devices including cameras with led lights and non powered hard drives without issues other than hotplugging. I have not lo...
by jets
Fri Nov 22, 2013 7:20 pm
Forum: General discussion
Topic: Is this good 12V power source for Pi?
Replies: 6
Views: 7102

Re: Is this good 12V power source for Pi?

I use these http://www.ebay.com/itm/Hot-LM2596-DC-Buck-Step-Down-Voltage-Adjustable-Converter-Power-Module-Regulator-/121173178248?pt=LH_DefaultDomain_0&hash=item1c367bf788 Being adjustable they allow you to adjust the voltage up to 5.25V at the TPs ensuring stability. Of course you need a voltmete...
by jets
Fri Nov 22, 2013 3:33 pm
Forum: General discussion
Topic: Is this good 12V power source for Pi?
Replies: 6
Views: 7102

Is this good 12V power source for Pi?

I recently came to conclusion, that I should power up my Pi-server at my off-grid-cabin directly from my battery bank, instead of getting power through inverter and then again through transformer. So, I ordered this: http://www.ebay.co.uk/itm/DC-12V-to-5V-3A-15W-Step-down-Converter-Regulator-female-...
by jets
Wed Nov 20, 2013 7:00 pm
Forum: Other projects
Topic: RPi to turn on and off wall socket.
Replies: 9
Views: 3560

Re: RPi to turn on and off wall socket.

I have remote control of sockets done now. What I used was exactly these instructions: https://github.com/dmcg/raspberry-strogonanoff With this transmitter: http://www.ebay.co.uk/itm/RF-Transmitter-Receiver-kit-433Mhz-wireless-Arduino-/131038612257 The pins of the transmitter have clear markings on ...

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