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Hi
Does anyone know what GPIO ports are used for the digital inputs and for the relay outputs on a RPi to replicate the functionality of a real Venus?
I've trolled through all the sites I can think of and come up blank. Anyone cracked it?
Any guidance greatly appreciated.
Cheers
Phil
Same qestion to me.
is it even possible?
Michael
Almost by accident I stumbled on a file in the VenusOS called /etc/venus/gpio_list last night. It suggests the ports are as follows:
Relay 1 - GPIO 21 Pin 40 (only one relay apparently)
Digital input 1 - GPIO 5 Pin 29
Digital input 2 - GPIO 6 Pin 31
Digital input 3 - GPIO 13 Pin 33
Digital input 4 - GPIO 19 Pin 35
Digital input 5 - GPIO 26 Pin 37
I haven't had a chance to test yet but looks promising.
Phil
Yes all confirmed being running for some time now all the analog and digital ports.
Hi Rob
Have you cracked the analog inputs? I tried bread-boarding an MCP3008 ADC as per some stuff I found on the web but the 'Analog Inputs' on the console remained vacant,
Do you know if there any tricks to getting the ADC talking to VenusOS? I have a list of the analog input channels and think I have the SPI wiring to the Pi sorted but obviously I'm missing something.
Cheers
Phil
Hi again Rob
I did look at that file and tried the suggestion but on my system there is no /sys/bus/iio directory. I looked in most of the other directories but couldn't find anything that looked like analog voltage stuff.
I'm running v2.40-34 in my 'play' system but I looked in my v2.33 'live' system and couldn't find that /iio directory either.
How does that directory get created? Do I need to install something to create it?
Cheers
Phil
Analog and digital I/O working!
Big thanks to Rob Duthie for helping me get the analog inputs showing on the Venus console.
I have a bit more work to do to get the correct sensors and proper values displayed - and most likely a few more questions for the experts out there.
But for now I'm happy to say that it is possible to utilise the five digital inputs, the relay output (only one) and have 5 analog inputs connected to the Venus-RPi system.
Cheers
Phil
Hi, is there any documentation on how you got this working? I want to connect digital tank senders to the RPi.
Hi Rob
I don't have much useful info; I just muddled through various posts and asked lots of questions to get mine working. But much of it is irrelevant now.
At the time it was a long convoluted process to get the analog inputs working - had to add a lot of dbus-adc stuff. But the latest Venus firmware (v2.53) has it all included and everything can be configured on the remote console without having to delve into command line stuff.
To be clear, the tank sender functions in Venus are analog and assume a resistive tank unit. Originally they had to be either US spec (240-33 ohm) or Euro spec (0-180 ohm) but now the resistance settings can be tweaked in the console to suit non-standard senders. Big improvement and big thanks to Victron for adding this.
The digital inputs are purely logic levels - on, off or pulse. I'm not sure what 'digital tank senders' you have but the digital inputs aren't the place to connect them if they are RS485, Canbus or similar.
Back to the analog inputs (for completeness), now that all the software side is included, the only remaining challenge is to add the MCP3208 ADC chip and the resistor networks on each input. Just a matter of following the wiring diagrams available on GitHub - can't recall where.
Cheers
Phil
Hi
As per my schematic, all works as per the Venus software and pin outs etc.
Just need to add a few files to Uboot in the root directory etc and you are done
Note: we have full update path that required no SSH commands to add files etc
There is script file written which takes care of this now, i have all the information required to do this automatically, email me for details.
Victron Raspi Hat.pdfVictron Raspi Stetson.pdf
Regards
Rob D
NZ
