adding dead radio code for future iteration and use

main/sensors/radio/radio.h

@@ -0,0 +1,39 @@
+/*************************************************
+* This is an interface for all radio functions
+*
+*************************************************/
+
+#pragma once
+
+#include <Arduino.h>
+
+class Radio
+{
+    public:
+    /**
+     * @brief Send a message to the ground station
+     * 
+     * @param message 
+     */
+    void print(String message);
+
+    /**
+     * @brief Send a message to the with an endline to the ground station
+     * 
+     * @param message 
+     */
+    void println(String message);
+
+    /**
+     * @brief Receive a message from the ground station
+     * 
+     * @return String 
+     */
+    String receive();
+
+    /**
+     * @brief Setup the radio
+     * 
+     */
+    void setup();
+};

main/sensors/radio/rfm9x.cxx

@@ -0,0 +1,144 @@
+/***************************************************
+ * This is the radio implementation for the RFM9X
+ * 
+ **************************************************/
+
+#include "radio.h"
+
+#include <RadioLib.h>
+
+/*
+   RadioLib RF69 Transmit with Interrupts Example
+
+   This example transmits FSK packets with one second delays
+   between them. Each packet contains up to 64 bytes
+   of data, in the form of:
+    - Arduino String
+    - null-terminated char array (C-string)
+    - arbitrary binary data (byte array)
+
+   For default module settings, see the wiki page
+   https://github.com/jgromes/RadioLib/wiki/Default-configuration#rf69sx1231
+
+   For full API reference, see the GitHub Pages
+   https://jgromes.github.io/RadioLib/
+*/
+
+// RF69 has the following connections:
+// CS pin:    11
+// lets try to ignore these two pins for now. In the future, DIO could be useful and maybe there should be a joint RESET for all SPI devices
+// DIO0 pin:  2
+// RESET pin: 3
+
+// save transmission state between loops
+int transmissionState = RADIOLIB_ERR_NONE;
+
+// flag to indicate that a packet was sent
+volatile bool transmittedFlag = false;
+
+// this function is called when a complete packet
+// is transmitted by the module
+// IMPORTANT: this function MUST be 'void' type
+//            and MUST NOT have any arguments!
+void setFlag(void) {
+  // we sent a packet, set the flag
+  transmittedFlag = true;
+}
+
+void Radio::setup() {
+
+  RFM95 radio = new Module(8, 26, 27, 4294967295UL, SPI);
+
+  // initialize RFM95 with default settings
+  Serial.print(F("[RFM95] Initializing ... "));
+  int state = radio.begin(915.0);
+  if (state == RADIOLIB_ERR_NONE) {
+    Serial.println(F("success!"));
+  } else {
+    Serial.print(F("failed, code "));
+    Serial.println(state);
+    while (true);
+  }
+
+  // set the function that will be called
+  // when packet transmission is finished
+  radio.setPacketSentAction(setFlag);
+
+  // NOTE: some RF69 modules use high power output,
+  //       those are usually marked RF69H(C/CW).
+  //       To configure RadioLib for these modules,
+  //       you must call setOutputPower() with
+  //       second argument set to true.
+  /*
+    Serial.print(F("[RF69] Setting high power module ... "));
+    state = radio.setOutputPower(20, true);
+    if (state == RADIOLIB_ERR_NONE) {
+      Serial.println(F("success!"));
+    } else {
+      Serial.print(F("failed, code "));
+      Serial.println(state);
+      while (true);
+    }
+  */
+
+  // start transmitting the first packet
+  Serial.print(F("[RF69] Sending first packet ... "));
+
+  // you can transmit C-string or Arduino string up to
+  // 64 characters long
+  transmissionState = radio.startTransmit("Hello World!");
+
+  // you can also transmit byte array up to 64 bytes long
+  /*
+    byte byteArr[] = {0x01, 0x23, 0x45, 0x67,
+                      0x89, 0xAB, 0xCD, 0xEF};
+    state = radio.startTransmit(byteArr, 8);
+  */
+}
+
+void Radio::println(String message) {
+  // check if the previous transmission finished
+  if(transmittedFlag) {
+    // reset flag
+    transmittedFlag = false;
+
+    if (transmissionState == RADIOLIB_ERR_NONE) {
+      // packet was successfully sent
+      Serial.println(F("transmission finished!"));
+
+      // NOTE: when using interrupt-driven transmit method,
+      //       it is not possible to automatically measure
+      //       transmission data rate using getDataRate()
+
+    } else {
+      Serial.print(F("failed, code "));
+      Serial.println(transmissionState);
+
+    }
+
+    // clean up after transmission is finished
+    // this will ensure transmitter is disabled,
+    // RF switch is powered down etc.
+    //TODO: radio.finishTransmit();
+
+    // wait a second before transmitting again
+    delay(1000);
+
+    // send another one
+    Serial.print(F("[RF69] Sending another packet ... "));
+
+    // you can transmit C-string or Arduino string up to
+    // 64 characters long
+    // TODO: we should check message length here
+
+    //TODO: transmissionState = radio.startTransmit(message);
+
+    // you can also transmit byte array up to 64 bytes long
+    /*
+      byte byteArr[] = {0x01, 0x23, 0x45, 0x67,
+                        0x89, 0xAB, 0xCD, 0xEF};
+      transmissionState = radio.startTransmit(byteArr, 8);
+    */
+  }
+}
+