Heltec LoRa ESP32 receiving data from Heltec CubeCell

ESP32_LoRaWAN_receive

/* Heltec Automation send communication test example
 *
 * Function:
 * 1. Send data from a CubeCell device over hardware 
 * 
 * 
 * this project also realess in GitHub:
 * https://github.com/HelTecAutomation/ASR650x-Arduino
 * */

#include <ESP32_LoRaWAN.h>
#include "Arduino.h"

#define RF_FREQUENCY                                915000000 // Hz

#define TX_OUTPUT_POWER                             14        // dBm

#define LORA_BANDWIDTH                              0         // [0: 125 kHz,
                                                              //  1: 250 kHz,
                                                              //  2: 500 kHz,
                                                              //  3: Reserved]
#define LORA_SPREADING_FACTOR                       7         // [SF7..SF12]
#define LORA_CODINGRATE                             1         // [1: 4/5,
                                                              //  2: 4/6,
                                                              //  3: 4/7,
                                                              //  4: 4/8]
#define LORA_PREAMBLE_LENGTH                        8         // Same for Tx and Rx
#define LORA_SYMBOL_TIMEOUT                         0         // Symbols
#define LORA_FIX_LENGTH_PAYLOAD_ON                  false
#define LORA_IQ_INVERSION_ON                        false


#define RX_TIMEOUT_VALUE                            1000
#define BUFFER_SIZE                                 200 // Define the payload size here

char txpacket[BUFFER_SIZE];
char rxpacket[BUFFER_SIZE];

static RadioEvents_t RadioEvents;
void OnRxDone( uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr );

int16_t txNumber;

int16_t Rssi,rxSize;

uint32_t  license[4] = {0xE43F317B, 0x48CAC77E, 0xC8891C04, 0xB77AFA9C};

void setup() {
    Serial.begin(115200);
    while (!Serial);
    SPI.begin(SCK,MISO,MOSI,SS);
    Mcu.init(SS,RST_LoRa,DIO0,DIO1,license);

    txNumber=0;
    Rssi=0;

    RadioEvents.RxDone = OnRxDone;

    Radio.Init( &RadioEvents );
    Radio.SetChannel( RF_FREQUENCY );
    Radio.SetRxConfig( MODEM_LORA, LORA_BANDWIDTH, LORA_SPREADING_FACTOR,
                                   LORA_CODINGRATE, 0, LORA_PREAMBLE_LENGTH,
                                   LORA_SYMBOL_TIMEOUT, LORA_FIX_LENGTH_PAYLOAD_ON,
                                   0, true, 0, 0, LORA_IQ_INVERSION_ON, true );
   }



void loop()
{
        Radio.Rx( 0 );
        delay(500);
        Radio.IrqProcess( );
}

void OnRxDone( uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr )
{
    Rssi=rssi;
    rxSize=size;
    memcpy(rxpacket, payload, size );
    rxpacket[size]='\0';
    Radio.Sleep( );

    Serial.printf("\r\nreceived packet \"%s\" with Rssi %d , length %d\r\n",rxpacket,Rssi,rxSize);
    Serial.println("wait to send next packet");
}