Mervis

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  OWFS server
  • zorro_66  

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  OK I will try to see what happens Just ordered my second Unipi for lab purposes My first Unipi control my chillers for my server racks [attachment=0:zhfhxnxj]System.png[/attachment:zhfhxnxj]
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  Help with HMI
  • zorro_66  

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  Have got it working now thanks for the help
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  Minibian and security updates
  • todward  

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  Hello. The release contains updates that are not part of standard apt-get update process so it is recommended to re-flash the SD card and upload your project again. If you want to update the standard debian packages, then apt-get method is always possible after mounting the FS for writing.
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  Timer
  • todward  

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  Hi, I think that you could connect the switchoff delay block behind the B31 as you suggest or a simple gt/lt (greater than/less then - but this will not solve the hysteresis as the B31does). As it is written in the documentation, X is the actual temperature from a sensor, W is the setpoint when the output will become True, Xp is the hysteresis - eg if set to 5, the out will become True once the teperature goes below 90-5=95 thus the relay will not switch that frequently. Take a look at the graph on the help file….
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  Sensor
  • est  

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  I did use "assign sensors". Using "detect sensors" in commissioning mode did the trick. Thank you!
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  Mervis OS image
  • est  

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  Hello, http://downloads.unipi.technology -> Mervis -> UniPi-Mervis-OS-2015-12-08
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  Button to light
  • SorakCz  

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  Hi, first of all you might need to set the sleep mode to minimum because the runtime run in loops which takes some time (not event-driven system) so it is highly possible you will not be able to catch pulses that do not take much time. I recommend making your own function block in st (see the video tutorials https://www.youtube.com/playlist?list=P ... ugVSn2K1RL )
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  Mervis minibian jessie wifi support
  • BlackSoll  

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  Hello, then you also need to tell the system to connect to the network: wpa_supplicant -Dwext -iwlan0 -c /etc/wpa_supplicant/wpa_supplicant.conf You might also want to automatically reconnect to the network, this can be done using the provided script: Go to /etc/ifplugd/action.d/ and rename the ifupdown file to ifupdown.original Then do: cp /etc/wpa_supplicant/ifupdown.sh ./ifupdown
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  One Wire Parasite Power - No Temp Reading
  • Drewscm  

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  Hello, we had a meeting about this but since mervis is a commercial solution, we wont be supporting unofficial hw. So it is on our todo-list but not at a first place.
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  HMI
  • FransSleddens  

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  Got it, Thanks! Shame on me!
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  Web
  • jesus_angulo  

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  Hello, the web port number in IDE is still on our todo list but not functional for now. If you have basic linux skills send me a PM and I will tell you what to do. Br, Tomas
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  Mervis DB offline wednesday evening?
  • Suntherm  

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  Hello, this was caused due to regular DB upgrade but you should have not lose any data. But everything should be OK now
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  Distance measurements into Mervis
  • Suntherm  

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  You can use the first simple voltage divider schematics for reading resistance with UniPi 1.1. Below is a schematics with values calculated for use with sensor with 400-5000ohm resistance. Also please remember that the onboard 12V might not be stable enough for using for such purposes! https://files.unipi.technology/index.ph ... uk6tMtL07M
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  FUPLA tutorials
  • Suntherm  

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  See the UniPi default project for simple program example http://downloads.unipi.technology
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  M-bus meter to UniPi?
  • Suntherm  

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  I cannot confirm that your HW will work but in mervis, you can just create a new channel with Mbus protocol, configure it and then you should be good to go with detection of the sensors. Actually I have not tried that because I do not have a mbus meter, so it would be great to share your experience.
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  Multiple 1-wire sensors on same bus?
  • Suntherm  

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  Hello, attach is used once you have the sensor added to the channel (also for replacing sensors). If you want to add more sensors you can use two ways: Remember, detecting/assigning new sensors must be made when the PLC is in COMMISIONING mode.
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  DS2413 output
  • Gif  

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  Just for info. For me it works with DS2413 (1wire dual channel switch), at least in output mode. I used library for DS2408 (1W-8R) and only modified family number.
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  Mervis installation package
  • Freud-Schiller  

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  There is no how-to. You would have to do it on your own. But most of them are in /var/opt/rcware /tftpboot/ and you will also need /www/ and of course the init scripts /etc/init.d/ - scripts and nginx and maybe some libraries… By the way what is the purpose of this? We worked hard on making the system as much read-only as possible in order to keep your sd card safe... It might be easier to install your packages on the distribution that we created.
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  Mervis API - Simple http Commands
  • Drewscm  

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  Have you tried the official HMI for crating web GUI? There is a http API but without any documentation. You would have to find out how the communication works from the HMI…
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  Read the weather
  • Drewscm  

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  Thank You for the response, I was charting out how I was going to setup the controls for the system and while lining it up the weather came to mind and had to ask. Currently I am just getting the system up and going so automatic control will come at a later date, at that point I will dig into it.