Add support for ESP-IDF component

CMakeLists.txt

@@ -0,0 +1,51 @@
+cmake_minimum_required(VERSION 3.13)
+
+if(ESP_PLATFORM)
+  # Build LoRaSerialization as an ESP-IDF component
+  # required because ESP-IDF runs cmake in script mode
+  # and needs idf_component_register()
+  file(GLOB_RECURSE LORA_SERIALIZATION_ESP_SOURCES
+    "src/*.*"
+  )
+
+  idf_component_register(
+    SRCS ${LORA_SERIALIZATION_ESP_SOURCES} 
+    INCLUDE_DIRS . src 
+  )
+
+  return()
+endif()
+
+if(CMAKE_SCRIPT_MODE_FILE)
+  message(FATAL_ERROR "Attempted to build LoRaSerialization in script mode")
+endif()
+
+project(radiolib)
+
+file(GLOB_RECURSE LORA_SERIALIZATION_SOURCES
+  "src/*.cpp"
+)
+
+add_library(LoRaSerialization ${LORA_SERIALIZATION_SOURCES})
+
+target_include_directories(LoRaSerialization
+    PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src>
+           $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
+
+# use c++20 standard
+set_property(TARGET LoRaSerialization PROPERTY CXX_STANDARD 20)
+
+# enable most warnings
+target_compile_options(LoRaSerialization PRIVATE -Wall -Wextra)
+
+include(GNUInstallDirs)
+
+install(TARGETS LoRaSerialization
+  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+  ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+)
+
+install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/src/
+  DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/LoRaSerialization
+  FILES_MATCHING PATTERN "*.h"
+)

idf_component.yml

@@ -0,0 +1,11 @@
+dependencies:
+  idf: '>=4.1'
+description: LoRaWAN serialization/deserialization library for The Things Network
+license: MIT
+repository: https://github.com/thesolarnomad/lora-serialization.git
+tags:
+- LoRaWAN
+- encoding
+- serialization
+- deserialization
+version: 3.2.1

src/LoraMessage.cpp

@@ -1,6 +1,9 @@
 #if ARDUINO >= 100
     #include "Arduino.h"
 #endif
+#ifdef ESP_PLATFORM
+    #include <cstdio>
+#endif
 #include <stdlib.h>
 #include "LoraMessage.h"
 #include "LoraEncoder.h"