nextgendcu/broker/README.md: Updates

broker/README.md

@@ -15,7 +15,13 @@ Till this happens, it is recommended to go through example files in the [etc/](.
 ## Setting up a local test for Jungfraujoch
 For development, it is possible to setup a local installation of Jungfraujoch. 
 This will work without FPGA installed in the computer and allows to test Jungfraujoch software layer, including
-ZeroMQ streaming and file writing. There are few necessary steps:
+ZeroMQ streaming and file writing. 
+
+The workflow simulates FPGA behavior, by running high-level synthesis code on the CPU - the performance is therefore 
+very low, as fixed-point calculations have large performance penalty on CPU. In the CPU simulation mode, one can simulate 
+using only a single FPGA device. 
+
+To run the test:
 
 ### Compile Jungfraujoch with frontend
 ```
@@ -38,6 +44,7 @@ Start writer:
 cd build/writer
 ./jfjoch_writer tcp://127.0.0.1:5500
 ```
+
 ### Run tests
 To run test a Python script is provided:
 ```
@@ -45,3 +52,7 @@ cd tests/test_data
 python jfjoch_broker_test.py
 ```
 The script will initialize Jungfraujoch, import test image and start data collection.
+
+### Expected result
+You can observe online data analysis by opening the following web page: [http://localhost:5232](http://localhost:5232).
+Also in the `build/writer` subdirectory a dataset with images should be written.