Lora Esp32 ping pong example stuck in rx mode

#1

when using the ping pong example and adjusting the frequency and removing the 1 second delay, both of the boards get stuck in rx mode within a minute. Please help me.

#2

Heres my code btw/* Heltec Automation Ping Pong communication test example
*

  • Function:
  • Description:
    1. Only hardware layer communicate, no LoRaWAN protocol support;
    1. Download the same code into two devices, then they will begin Ping Pong test each other;
    1. This example is for CubeCell hardware basic test.
  • HelTec AutoMation, Chengdu, China
  • �ɶ��������Զ����Ƽ����޹�˾
  • www.heltec.org
  • */

#include “LoRaWan_APP.h”
#include “Arduino.h”

#define RF_FREQUENCY 433000000 // Hz

#define TX_OUTPUT_POWER 5 // 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 30 // Define the payload size here

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

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

typedef enum
{
LOWPOWER,
STATE_RX,
STATE_TX
}States_t;

int16_t txNumber;
States_t state;
bool sleepMode = false;
int16_t Rssi,rxSize;

void setup() {
Serial.begin(115200);
Mcu.begin();
txNumber=0;
Rssi=0;

RadioEvents.TxDone = OnTxDone;
RadioEvents.TxTimeout = OnTxTimeout;
RadioEvents.RxDone = OnRxDone;

Radio.Init( &RadioEvents );
Radio.SetChannel( RF_FREQUENCY );
Radio.SetTxConfig( MODEM_LORA, TX_OUTPUT_POWER, 0, LORA_BANDWIDTH,
                               LORA_SPREADING_FACTOR, LORA_CODINGRATE,
                               LORA_PREAMBLE_LENGTH, LORA_FIX_LENGTH_PAYLOAD_ON,
                               true, 0, 0, LORA_IQ_INVERSION_ON, 3000 );

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 );
state=STATE_TX;

}

void loop()
{
switch(state)
{
case STATE_TX:

  txNumber++;
  sprintf(txpacket,"hello %d, Rssi : %d",txNumber,Rssi);
  Serial.printf("\r\nsending packet \"%s\" , length %d\r\n",txpacket, strlen(txpacket));
  Radio.Send( (uint8_t *)txpacket, strlen(txpacket) );
  state=LOWPOWER;
  break;
case STATE_RX:
  Serial.println("into RX mode");
  Radio.Rx( 0 );
  state=LOWPOWER;
  break;
case LOWPOWER:
  Radio.IrqProcess( );
  break;
default:
  break;

}
}

void OnTxDone( void )
{
Serial.print(“TX done…”);
state=STATE_RX;
}

void OnTxTimeout( void )
{
Radio.Sleep( );
Serial.print(“TX Timeout…”);
state=STATE_TX;
}

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");

state=STATE_TX;

}

Im using Heltec LoRa esp32 v2 on 433 frequency. I was thinking of making one board only have a tx timeout and one only have a rx timeout to prevent this. But i dont know much and cant find anything about an rx timeout.
edit: i have no idea why the code did that.