Posts made by CKB

Hi,

I just updated my UniPi1.1 devices to the new 1.7OS using Mervis 74371 and recognized that the Analog Out values have been inverted:
formerly int=10.000 meant 0V and int=0 meant 10V
now int=10.000 means 10V and int=0 means 0V

Did this happen by accident?

BTW - is there a way to smoothen the AO changerate so I can get rid of the steps? (I see it in my light when dimming up and down)
see for instance here:

Thanks
CKB

Found out that EMC was not an issue, but the LED power supply. I added a 10k resistor in parallel to the 0-10V input which fixed the 0V problem.
Only poor thing now is the bad behaviour of Mervis with the AO extension board. I added a ramp for smooth dimm up and down, but it's actually not smooth but rather stepwise:

Any idea how to fix? Maybe the problem comes from the transformation "to_uint(real)" ?

Yes, it’s the old AO add on shown in the picture.
I found out that I can adjust the output voltage from 0-10V with an uint from 0....4095. If I put it 4096 it jumps back to 0V.
Can you confirm ?

Also is it allowed to apply 24V as supply or will it damage the unit?

Right now I am facing the problem of noise injection into the cable at the analog out. Even though I use a PIMPF Cat7 cable (approx 2m long) at the AO, parallel running cables inject a voltage around 0.5...0.6V. I have a LED power supply connected which can be dimmed and which switches on/off at 0.6V and now the LEDs are blinking^^.
Any idea how to improve ? (I know.. I shouldn’t lay the cat7 along with power cables, but I didn’t expect so huge effects. However, I will try to find an alternative route :) )

Hi, can anyone give me a hint how to control the AO Add-on? I mean, what uint value means +10V at the OUT, what uint value gives 0V at the OUT? right now it feels like jeopardy ^^ ..e.g. if I set the channel to uint=10000, I get 4.4V at the OUT. channel transformation is identity, power supply with 5V and 24V for AO

thanks in advance

Hi Tomas, just FYI - Giamba was so nice to help me in a short teamviewer session. It works now fir his example project. Will transfer it to my solution later on :)

Hi, did it work for Giamba? It still doesn't work for me even with the new IDE.. :/

Hi Tomas, can you share the pre-released IDE with the fixed SSCP please?

I read the same information in my port monitor

only option I see is to check the ports at the router. In Cisco forums they mention to open TCP port 2000, so will try this later on.

system status says for both sscp channels:

I cannot find the problem

I tried it again with the newer runtime, also adjusted the IP setting and simplified the program to an unidirectional communication from PLC2 to PLC1.
The result is: no longer error messages, only fault is that the variable (fromUniPi2) at PLC1 which I want to change via PLC2 is now marked in red. I declared it in the Globals, with and without any namespace but no success. Is there a trick/another fault?

Thx
CB

@tomas_hora I sent you a download link for wetransfer in the chat

@tomas_hora

Sure, to which email adress shall I send the snn file?
Think the fault must be somewhere at the TCP settings...

I want to share data between two UniPi with Mervis. Currently I try an approach with coms over SSCP described in the Mervis IDE Help (when searching with the title of this topic).
I followed the decription, but during the build it throws an error for an incorrect connection type for both PLCs.
I cannot find the fault... Did anyone try this before?

Thanks & Regards
CB

@tomas_hora Can you describe roughly how to create a Modbus TCP communication from one Unipi to another?
I can also provide my solution with the two PLCs

Hi,
bought this sensor at your shop: https://www.unipi.technology/1-wire-temperature-sensor-p63?categoryId=3
Now I integrated it into Mervis - worked well, but how to setup the channel so that I can read the correct temperatur value in °C?
settings at the moment are:

Many thanks
CKB

are these few pieces of AO's still available?

@tomas_hora the two UniPi's I have are running on Mervis. What about SoftPLC?

@tomas_hora Many forums mention netcat as a very flexible tool for client/server applications - easy to use and it runs on any linux application.
I find project examples where people connect two RPi's but unfortunately there is no project where they do the same with a RPi & a UniPi.
I really would like to realize this setup since it is a key element to enable future steps with peripherals for voice/face recognition.

Hi,

for a smart home solution I have 2 UniPi's (and a stack of extension boards) as main computing units to automatically control shutters, light, alarms etc.
In order to enable also manual changes for shutter positions or lights I like to install 2 Raspberry Pi's with a mounted touch panel at central positions - like this:

The user shall be able to change settings on the UniPi(s) via the RPi or get information from the UniPi(s)
Like this:

How to realize a bidirectional communication (grey & orange) between RPi's and UniPi's? I2C? Ethernet? ....

Thanks in advance
CKB