Need help installing Mono framework (.NET support) on Raspberry Pi 3

Hi there,

I installed OpenHab2 on Raspberry Pi 3 following official instructions.

I’d like to also run NodeLink server on the same RPi3.

NodeLink requires ‘Mono framework’ for .NET support and I cannot get ‘Mono’ installed on my RPi3. I followed instructions from here and unfortunately got into some dependencies-related problems that I don’t know how to solve(no linux experience).

I searched online and found some advice to first install ‘mono-vbnc’ and ‘mono-complete’ :

sudo apt-get install mono-vbnc mono-complete

Unfortunately it also gives some errors:

openhabian@openHAB2:~$ sudo apt-get install mono-vbnc mono-complete
[sudo] password for openhabian:
Reading package lists… Done
Building dependency tree
Reading state information… Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
mono-complete : Depends: mono-runtime (= 5.4.0.201-0xamarin10+raspbian9b1) but it is not going to be installed
Depends: mono-runtime-sgen (= 5.4.0.201-0xamarin10+raspbian9b1) but it is not going to be installed
Depends: mono-utils (= 5.4.0.201-0xamarin10+raspbian9b1) but it is not going to be installed
Depends: mono-devel (= 5.4.0.201-0xamarin10+raspbian9b1) but it is not going to be installed
Depends: mono-mcs (= 5.4.0.201-0xamarin10+raspbian9b1) but it is not going to be installed
Depends: mono-roslyn (= 5.4.0.201-0xamarin10+raspbian9b1) but it is not going to be installed
Depends: mono-csharp-shell (= 5.4.0.201-0xamarin10+raspbian9b1) but it is not going to be installed
Depends: mono-4.0-gac (= 5.4.0.201-0xamarin10+raspbian9b1) but it is not going to be installed
Depends: mono-4.0-service (= 5.4.0.201-0xamarin10+raspbian9b1) but it is not going to be installed
Depends: monodoc-base (= 5.4.0.201-0xamarin10+raspbian9b1) but it is not going to be installed
Depends: monodoc-manual (= 5.4.0.201-0xamarin10+raspbian9b1) but it is not going to be installed
Depends: libmono-cil-dev (= 5.4.0.201-0xamarin10+raspbian9b1) but it is not going to be installed
Depends: ca-certificates-mono (= 5.4.0.201-0xamarin10+raspbian9b1) but it is not going to be installed
mono-vbnc : Depends: libmono-microsoft-visualbasic10.0-cil (= 4.6-0xamarin10+raspbian9b1) but it is not going to be installed
Depends: libmono-accessibility4.0-cil but it is not going to be installed
Depends: libmono-system-configuration4.0-cil but it is not going to be installed
Depends: libmono-system-data4.0-cil but it is not going to be installed
Depends: libmono-system-design4.0-cil but it is not going to be installed
Depends: libmono-system4.0-cil (>= 4.0.0~alpha1) but it is not going to be installed
Depends: libmono-system-drawing-design4.0-cil but it is not going to be installed
Depends: libmono-system-drawing4.0-cil but it is not going to be installed
Depends: libmono-system-web4.0-cil but it is not going to be installed
Depends: libmono-system-web-services4.0-cil but it is not going to be installed
Depends: libmono-system-windows-forms4.0-cil but it is not going to be installed
Depends: libmono-system-xml4.0-cil but it is not going to be installed
Depends: mono-runtime (>= 3.0~) but it is not going to be installed
Depends: libmono-cecil-vb0.9-cil (>= 2.99) but it is not going to be installed
Depends: libmono-corlib4.5-cil (>= 4.0.0~alpha1) but it is not going to be installed
Depends: libmono-system-core4.0-cil (>= 4.0.0~alpha1) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

Could someone please help me install ‘mono framework’ on RPi3 running openhabian?

Thanks in advance!
-Mark

P.S.: Just in case.

###############################################################################
################# openHAB2 ######################################## 7.05.170509
###############################################################################
##        Ip = 192.168.1.60
##   Release = Raspbian GNU/Linux 8 (jessie)
##    Kernel = Linux 4.9.35-v7+
##  Platform = Raspberry Pi 3 Model B Rev 1.2
##    Uptime = 0 day(s). 11:35:3
## CPU Usage = 1.51 % avg over 4 cpu(s)  (4 core(s) x 1 socket(s))
##  CPU Load = 1m: 0.00, 5m: 0.00, 15m: 0.00
##    Memory = Free: 0.40GB (43%), Used: 0.54GB (57%), Total: 0.94GB
##      Swap = Free: 0.09GB (100%), Used: 0.00GB (0%), Total: 0.09GB
##      Root = Free: 26.08GB (92%), Used: 2.00GB (8%), Total: 29.31GB
##   Updates = 0 apt-get updates available.
##  Sessions = 1 sessions
## Processes = 131 running processes of 32768 maximum processes
###############################################################################

                  openHAB 2.1.0-1 (Release Build)

Well, given this is an openHAB forum and openHAB runs in Java, not Mono, you will have much better luck posting to a NodeLink, Mono, or Raspberry Pi forum.

Right, but my question is mainly related to the Installation (Linux-related). So I hoped to get help from people familiar with the structure of Openhabian RPi image.