update README

README.md

@@ -55,14 +55,44 @@ command history
 # OPC ua
 
 ## Python C library install
+(note: already installed on dop36)
 
 git clone https://github.com/open62541/open62541
 follow install instructions from https://open62541.org/doc/current/installing.html
 
 ## Python Client Install
-
+(note: already installed on dop36)
+```
 sudo apt install python-opcua
 sudo apt install python-opcua-tools
 cd opcua/
 git clone https://github.com/FreeOpcUa/python-opcua.git
+```
+
+## Test the OPCua client with the proviced C client
+
+Compile the OPCua client: 
+`cd test/c/ua_client`
+then execute the command shown in the README file in that directory
+
+1. Start the sdpunb server on dop36:
+```
+cd src
+./sdpunb --configfile=uniboard2.conf --nodaemon
+```
+
+2. Run the client:
+```
+cd test/c/ua_client
+./client
+```
+
+The (test) client reads out all available Uniboard registers.
+
+## Test the OPCua client with the opcua-client (GUI) on test-lcu2.astron.nl
+
+`ssh -J hiemstra@portal.astron.nl -L localhost:55555:test-lcu2.astron.nl:55555 hiemstra@test-lcu2.astron.nl`
+run OPCua GUI client:
+`opcua-client`
+then open an OPCua connection to: `opc.tcp://dop36:4840`