Added support for PlatformIO

.gitignore

@@ -42,3 +42,57 @@ amplifytools.xcconfig
 .secret-*
 **.sample
 #amplify-do-not-edit-end
+
+# -- PlatformIO 
+
+fw/platformio/.pio
+fw/platformio/.vscode/.browse.c_cpp.db*
+fw/platformio/.vscode/c_cpp_properties.json
+fw/platformio/.vscode/launch.json
+fw/platformio/.vscode/ipch
+
+# -- MacOS
+
+*.log
+# General
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+# -- VSCode 
+
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+!.vscode/*.code-snippets
+
+# Local History for Visual Studio Code
+.history/
+
+# Built Visual Studio Code Extensions
+*.vsix

README.md

@@ -14,7 +14,12 @@ SquidRID is a experimental tool to test and control most of aspects of the FAA R
 
 The configurator is accessible at [https://squidrid.flyandi.net](https://squidrid.flyandi.net) but requires Google Chrome.
 
-SquidRID run's on most ESP32 boards and requires the Arduino IDE to upload the firmware.
+SquidRID run's on most ESP32 boards. Firmware can be compiled and uploaded using either:
+* The Arduino IDE
+  * Open `fw/squidrid/squidrid.ino` in the Arudino IDE. 
+* PlatformIO + Visual Studio Code. 
+  * Open the project by running `code fw/platformio`
+  * See [fw/platformio/README.md](fw/platformio/README.md) for more details. 
 
 ## Features
 ```

fw/platformio/.vscode/extensions.json

@@ -0,0 +1,10 @@
+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack"
+    ]
+}

fw/platformio/README.md

@@ -0,0 +1,10 @@
+# About
+
+This folder contains a [PlatformIO](https://platformio.org/platformio-ide) project to compile the Arduino firmware files in `fw/squidrid` (`./src` is a symbolic link to `../fw/squidrid`). 
+
+PlatformIO is a new generation toolset for embedded C/C++ development as a [VSCode](https://code.visualstudio.com/) extension.
+
+# Configuration
+
+This PlatformIO project is currently configured for a `featheresp32` board in the `arduino` environment. Specifically, I am using [Adafruit Huzzah32 Featherboard](https://www.adafruit.com/product/3405), but any ESP32 board should do. Just change configuration in PlatformIO extension (see `platformio.ini`). 
+

fw/platformio/docs/README.md

@@ -0,0 +1,3 @@
+# Remote ID Technical Specs 
+
+For the FAA provides specs via PDF Designation F3411 for free. View the [F3411.40165 PDF file here](https://mobile.reginfo.gov/public/do/eoDownloadDocument?pubId=&eodoc=true&documentID=7280). If the link above is dead, search for "FAA F3411"

fw/platformio/include/README

@@ -0,0 +1,39 @@
+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the usual convention is to give header files names that end with `.h'.
+It is most portable to use only letters, digits, dashes, and underscores in
+header file names, and at most one dot.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html

fw/platformio/lib/README

@@ -0,0 +1,46 @@
+
+This directory is intended for project specific (private) libraries.
+PlatformIO will compile them to static libraries and link into executable file.
+
+The source code of each library should be placed in a an own separate directory
+("lib/your_library_name/[here are source files]").
+
+For example, see a structure of the following two libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional, custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
+|  |
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |
+|  |- README --> THIS FILE
+|
+|- platformio.ini
+|--src
+   |- main.c
+
+and a contents of `src/main.c`:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+PlatformIO Library Dependency Finder will find automatically dependent
+libraries scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html

fw/platformio/platformio.ini

@@ -0,0 +1,20 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:featheresp32]
+platform = espressif32
+board = featheresp32
+framework = arduino
+lib_deps = 
+	WiFi
+	plerup/EspSoftwareSerial@^8.1.0
+build_flags = -DCORE_DEBUG_LEVEL=5
+monitor_speed = 115200
+monitor_filters = time

fw/platformio/src

@@ -0,0 +1 @@
+../squidrid

fw/platformio/test/README

@@ -0,0 +1,11 @@
+
+This directory is intended for PlatformIO Test Runner and project tests.
+
+Unit Testing is a software testing method by which individual units of
+source code, sets of one or more MCU program modules together with associated
+control data, usage procedures, and operating procedures, are tested to
+determine whether they are fit for use. Unit testing finds problems early
+in the development cycle.
+
+More information about PlatformIO Unit Testing:
+- https://docs.platformio.org/en/latest/advanced/unit-testing/index.html