**LoRa Communication** rev_01

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    - Project: **LoRa Communication**
    - Source Code NOT compiled for: ESP32 DevKit V1
    - Source Code created on: 2025-01-09 15:43:10

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* Implement a robust LoRa communication system using */
    /* SX127x module with defined SPI and digital pins */
    /* for data transmission and reception. Ensure proper */
    /* initialization and handling of reset and data */
    /* output states for reliable performance. */
/****** END SYSTEM REQUIREMENTS *****/

/* START CODE */

/****** DEFINITION OF LIBRARIES *****/
#include <SPI.h>
#include <LoRa.h>   //https://github.com/sandeepmistry/arduino-LoRa

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);
void updateOutputs(void);

/***** DEFINITION OF DIGITAL INPUT PINS *****/
const uint8_t dio0 = 2; // DIO0 pin for LoRa module

/***** DEFINITION OF DIGITAL OUTPUT PINS *****/
const uint8_t rst = 14; // Reset pin for LoRa module

/***** DEFINITION OF SPI PINS *****/
const uint8_t lora_SX127x_SPI_PIN_MOSI_D23 = 23;
const uint8_t lora_SX127x_SPI_PIN_MISO_D19 = 19;
const uint8_t lora_SX127x_SPI_PIN_SCLK_D18 = 18;
const uint8_t lora_SX127x_SPI_PIN_CS_D5 = 5; // Chip select pin for LoRa module

/***** DEFINITION OF OUTPUT RAW VARIABLES *****/
bool lora_SX127x_NRESET_PIN_D4_rawData = 0; // Raw data for reset pin

/***** DEFINITION OF OUTPUT PHYSICAL VARIABLES *****/
float lora_SX127x_NRESET_PIN_D4_phyData = 0.0; // Physical data for reset pin

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/

int counter = 0; // Counter for sending packets

void setup(void)
{
    // Initialize serial communication
    Serial.begin(115200);
    while (!Serial);
    Serial.println("LoRa Sender");

    // Set pin modes
    pinMode(rst, OUTPUT);
    pinMode(lora_SX127x_SPI_PIN_CS_D5, OUTPUT);
    pinMode(dio0, INPUT);

    // Start the SPI library
    SPI.begin();

    // Initialize LoRa with defined pins
    LoRa.setPins(lora_SX127x_SPI_PIN_CS_D5, rst, dio0);

    // Begin LoRa communication
    while (!LoRa.begin(433E6)) // 433E6 - Asia, 866E6 - Europe, 915E6 - North America
    {
        Serial.println(".");
        delay(500);
    }
    LoRa.setSyncWord(0xA5); // Set sync word for communication
    Serial.println("LoRa Initializing OK!");
}

void loop(void)
{
    // Send a packet
    Serial.print("Sending packet: ");
    Serial.println(counter);

    LoRa.beginPacket();   // Start LoRa packet
    LoRa.print("hello ");
    LoRa.print(counter);
    LoRa.endPacket(); // End the packet

    counter++; // Increment counter

    updateOutputs(); // Refresh output data

    delay(10); // Delay for stability
}

void updateOutputs()
{
    // Update the reset pin state
    digitalWrite(rst, lora_SX127x_NRESET_PIN_D4_rawData);
}

/* END CODE */