Add a description of the steps for running the b-ss profile under qemu

zephyr/samples/profiles/b-ss/README.rst

@@ -21,3 +21,36 @@ This sample can be found under :bacnet_file:`samples/profiles/b-ss` in
 the BACnet tree.
 
 The sample can be built for several platforms.
+
+
+QEMU testing
+************
+
+The main logic of work can be found at the link 
+https://docs.zephyrproject.org/3.0.0/guides/networking/qemu_setup.html
+
+Steps to testing
+1 Load and make net-tools:
+    git clone https://github.com/zephyrproject-rtos/net-tools
+    cd net-tools
+    make
+2 Run net-tools loops in two termitals:
+    first: cd ~/net-tools && ./loop-socat.sh
+    second: cd ~/net-tools && sudo ./loop-slip-tap.sh
+3 Configure prj.conf
+    The net-tools creates and uses network 192.0.2.0/24 as `tap0` interface. 
+    Need change prj.conf:
+    CONFIG_NET_CONFIG_MY_IPV4_ADDR="192.0.2.1"
+    CONFIG_NET_CONFIG_PEER_IPV4_ADDR="192.0.2.2"
+4 Set BACNET_IFACE to tap0:
+    export BACNET_IFACE=tap0
+5 Compile and run b-ss profile:
+    west build -b qemu_x86 -p always -t run bacnet-stack/zephyr/samples/profiles/b-ss/
+6 Run bacnet-stack app tools as a test tool, like readprop:
+    bacnet-stack/apps/readprop/bacrp --mac 192.0.2.1:47808 55 17 1 77
+    here:
+      17 - OBJECT_SCHEDULE
+      1 - schedule index
+      77 - PROP_OBJECT_NAME
+    expected result - string:
+     "SCHEDULE 1"