Merge pull request #62 from Gagns4395/master

Update the build intrsuctions

CMakeLists.txt

@@ -3,12 +3,8 @@ project(serial2mqtt VERSION 0.1.0)
 set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g ")
 set(CMAKE_C_FLAGS "${CMAKE_CXX_FLAGS} -g ")
-set(PAHO_MQTT_C_LIBRARIES paho.mqtt.c) 
-# add suffix when using static Paho MQTT C library variant
-if(PAHO_BUILD_STATIC)
-    set(_PAHO_MQTT_C_LIB_NAME ${_PAHO_MQTT_C_LIB_NAME}-static)
-endif()
-find_package(eclipse-paho-mqtt-c REQUIRED)
+
+find_package(OpenSSL REQUIRED)
 add_definitions(-DLINUX -std=c++11)
 add_executable(serial2mqtt)
 
@@ -25,17 +21,22 @@ target_sources(serial2mqtt PRIVATE
     src/CircBuf.cpp 
     src/Sema.cpp 
     ) 
-
+
+# added paho.mqtt.c/src for paho-mqtt-c header files
 include_directories(src  
     ArduinoJson/src 
+    paho.mqtt.c/src
     )
 
+#Where to find the lib "libpaho-mqtt3as.a", libssl and libcrypto
+link_directories(${CMAKE_SOURCE_DIR}/paho.mqtt.c/src /usr/local/lib)
+
+# added libpaho-mqtt3as.a, libssl.a and libcrypto.a as we build in static mode
 target_link_libraries(serial2mqtt 
-    eclipse-paho-mqtt-c::paho-mqtt3as-static
+    libpaho-mqtt3as.a
+    -l:libssl.a
+    -l:libcrypto.a
     -lpthread 
     -lrt 
     -pthread 
     -latomic )
-
-
-

README.md

@@ -141,14 +141,30 @@ MQTT Broker ->> programmer CLI : logs
 deactivate serial2mqtt
 ```
 # Logging through serial2mqtt
-Everything that serial2mqtt receives on the serial port is also send on a topic.The micrcontroller will also log to the central logging system 
+Everything that serial2mqtt receives on the serial port is also send on a topic. The micrcontroller will also log to the central logging system 
+
 # Build instructions
-- install libssl-dev ( apt-get  install libssl-dev )
-- git clone --recurse-submodules https://github.com/vortex314/serial2mqtt.git
-- cd serial2mqtt
-- cd paho.mqtt.c &&  cmake -DPAHO_BUILD_STATIC=true && make && cd ..
-- in serial2mqtt folder : mkdir build && cd build && cmake .. && make
+Tested with Ubuntu 22.04.4 LTS Desktop 64 bits and Ubuntu 22.04.4 LTS Server 64 bits.
+
+These instructions should fit any Linux distribution, suh as Debian (including Raspberry Pi) and Ubuntu distribution.
+
+`serial2mqtt` is leveraging `paho-mqtt-c` library in secure mode, therefore it requires OpenSSL and crypto library.
 
+Here are the build commands:
+```
+sudo apt-get  install libssl-dev
+git clone --recurse-submodules https://github.com/vortex314/serial2mqtt.git
+cd serial2mqtt
+cd paho.mqtt.c
+cmake -DPAHO_BUILD_STATIC=true -DPAHO_WITH_SSL=true
+cmake --build .
+make
+cd ..
+mkdir build
+cd build
+cmake ..
+make
+```
 
 There's an [experimental OpenWrt package](https://github.com/halfbakery/serial2mqtt-openwrt),
 you can build az ipk package from the git head tailored to your system in