initial commit

.gitignore

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+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

.vscode/extensions.json

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+{
+    // 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"
+    ]
+}

include/README

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+
+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 convention is to give header files names that end with `.h'.
+
+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

lib/README

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

platformio.ini

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+; 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:pico]
+platform = https://github.com/maxgerhardt/platform-raspberrypi.git
+board = pico
+framework = arduino
+board_build.core = earlephilhower
+lib_deps = jgromes/RadioLib@^7.4.0
+
+[env:pico2]
+platform = https://github.com/maxgerhardt/platform-raspberrypi.git
+board = rpipico2
+framework = arduino
+board_build.core = earlephilhower
+lib_deps = jgromes/RadioLib@^7.4.0

src/main.cpp

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+/*
+    Simple test of a LoRa RA-01 module usign RadioLib on an Arduino 101
+*/
+
+#include <SPI.h>
+#include <Arduino.h>
+#include <RadioLib.h>
+
+
+#define RADIO_CS_PIN   6 // on-device: NSS
+#define RADIO_IRQ_PIN  8 // on-device: DIO0
+#define RADIO_RST_PIN  7 // on-device: RST
+#define SCK_PIN        2 
+#define MISO_PIN       4
+#define MOSI_PIN       3
+
+#define LOCKUP(x) do{Serial.println(x);delay(1000);}while(true)
+
+
+const bool TRANSMIT_FIRST = true;
+
+SX1278 radio = new Module(RADIO_CS_PIN, RADIO_IRQ_PIN, RADIO_RST_PIN);
+int tx_state = RADIOLIB_ERR_NONE;
+bool tx_flag = false;
+volatile bool operation_done = false;
+
+
+void operation_done_cb(void)
+{
+	operation_done = true;
+}
+
+
+SPISettings spisettings(1000000, MSBFIRST, SPI_MODE0);
+
+void setup()
+{
+	Serial.begin(9600);
+
+  SPI.setSCK(SCK_PIN);
+  SPI.setTX(MOSI_PIN);
+  SPI.setRX(MISO_PIN);
+	SPI.begin(true);
+
+	Serial.print(F("[SX1278] Initializing ... "));
+	int state = radio.begin();
+	if (state == RADIOLIB_ERR_NONE) {
+		Serial.println(F("success!"));
+	} else {
+		Serial.print(F("failed, code "));
+		Serial.println(state);
+		LOCKUP(state);
+	}
+
+	radio.setDio0Action(operation_done_cb, RISING);
+
+	if (TRANSMIT_FIRST) {
+		Serial.print(F("[SX1278] Sending first packet ... "));
+		tx_state = radio.startTransmit("Hello World!");
+		tx_flag = true;
+	} else {
+		Serial.print(F("[SX1278] Starting to listen ... "));
+		state = radio.startReceive();
+		if (state == RADIOLIB_ERR_NONE) {
+			Serial.println(F("success!"));
+		} else {
+			Serial.print(F("failed, code "));
+			Serial.println(state);
+			LOCKUP();
+		}
+	}
+}
+
+
+void loop()
+{
+	if (operation_done) {
+		operation_done = false;
+
+		if(tx_flag) {
+			if (tx_state == RADIOLIB_ERR_NONE) {
+				Serial.println(F("transmission finished!"));
+			} else {
+				Serial.print(F("failed, code "));
+				Serial.println(tx_state);
+			}
+
+			radio.startReceive();
+			tx_flag = false;
+
+		} else {
+			String str;
+			int state = radio.readData(str);
+
+			if (state == RADIOLIB_ERR_NONE) {
+				Serial.println(F("[SX1278] Received packet!"));
+
+				// print data of the packet
+				Serial.print(F("[SX1278] Data:\t\t"));
+				Serial.println(str);
+
+				// print RSSI (Received Signal Strength Indicator)
+				Serial.print(F("[SX1278] RSSI:\t\t"));
+				Serial.print(radio.getRSSI());
+				Serial.println(F(" dBm"));
+
+				// print SNR (Signal-to-Noise Ratio)
+				Serial.print(F("[SX1278] SNR:\t\t"));
+				Serial.print(radio.getSNR());
+				Serial.println(F(" dB"));
+			}
+
+			delay(1000);
+
+			Serial.print(F("[SX1278] Sending another packet ... "));
+			tx_state = radio.startTransmit("Hello World!");
+			tx_flag = true;
+		}
+	}
+}

test/README

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+
+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