LoRa p2p communication using stm32wle5ccu6

[hashara]

Hi everyone,

I’m trying to implement LoRa point-to-point (P2P) communication using the stm32wle5ccu6.

I configured the .ioc file based on the SUBGHz_Phy PingPong example for the NUCLEO-WL55JC1. Then, I wrote the code for LoRa transmission. On the receiver side, the only change I made was replacing:
Radio.Send((uint8_t *)BufferTx, sizeof(BufferTx));
with
Radio.Rx(RX_TIMEOUT_VALUE);
However, I’m still unable to successfully send or receive packets. On the transmission side, I keep getting a TX timeout.

Could someone please take a look at my configuration and help identify where I might have gone wrong? If there are any other examples, guides, or documentation that I might have missed, I would really appreciate it if you could point me in the right direction.

Thank you

/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2025 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "dma.h"
#include "rtc.h"
#include "app_subghz_phy.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "radio.h"
#include "stdbool.h"
//#include "radio_board_if.h"
/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
#define RF_FREQUENCY                                868000000 /* Hz */
//#ifndef TX_OUTPUT_POWER   /* please, to change this value, redefine it in USER CODE SECTION */
#define TX_OUTPUT_POWER                             22
#define LORA_BANDWIDTH                              0         /* [0: 125 kHz, 1: 250 kHz, 2: 500 kHz, 3: Reserved] */
#define LORA_SPREADING_FACTOR                       10         /* [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                         5         /* Symbols */
#define LORA_FIX_LENGTH_PAYLOAD_ON                  false
#define LORA_IQ_INVERSION_ON                        false
#define PAYLOAD_LEN                                 64

#define TX_TIMOUT_VALUE                             10000
#define RX_TIMOUT_VALUE                             30000

#define MAX_APP_BUFFEE_SIZE                         255

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */

/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */
char message[] = "Hello, World!\n";
uint8_t BufferTx[2]={10,23};
char txm[] = "Tx Done\n";
char rxm[] = "Rx Done\n";

char txtmo[]= "Tx Timeout\n";
char rxtmo[]="Rx Timeout\n";
char errradio[]="Radio error\n";


uint8_t rxDone=0;
uint8_t rxTimout=0;
uint8_t txTimout=0;
uint8_t txDone=0;
uint8_t rxerror=0;

radio_status_t test;

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
void OnTxDone(void) {
  //  HAL_UART_Transmit(&huart2, (uint8_t *)txm, sizeof(txm), HAL_MAX_DELAY);
	txDone=1;
	Radio.Send(BufferTx,64);
    //Radio.Rx(3000); // Restart receiving after transmission
}

void OnRxDone(uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr) {
//    payload[size] = '\0';  // Null-terminate received data
  //  HAL_UART_Transmit(&huart2, (uint8_t *)rxm, sizeof(rxm), HAL_MAX_DELAY);
   // Radio.Rx(3000);  // Restart listening

    rxDone=1;
}

void OnTxTimeout(void) {
   // HAL_UART_Transmit(&huart2, (uint8_t *)txtmo, sizeof(txtmo), HAL_MAX_DELAY);
	txTimout=1;
	Radio.Send(BufferTx,sizeof(BufferTx));
}


void OnRxTimeout(void) {
   // HAL_UART_Transmit(&huart2, (uint8_t *)rxtmo, sizeof(rxtmo), HAL_MAX_DELAY);
//    Radio.Rx(0);  // Restart listening
	Radio.Rx(RX_TIMOUT_VALUE);
	rxTimout=1;
}

void OnRxError(void){
	//HAL_UART_Transmit(&huart2, (uint8_t *)errradio, sizeof(errradio), HAL_MAX_DELAY);
//	Radio.Rx(0);  // Restart listening
	rxerror=1;
}

void RadioInit(void) {
    static RadioEvents_t RadioEvents;  // Make sure it's static or global

    // Assign the callback functions
    RadioEvents.TxDone = OnTxDone;
    RadioEvents.RxDone = OnRxDone;
    RadioEvents.TxTimeout = OnTxTimeout;
    RadioEvents.RxTimeout = OnRxTimeout;
    RadioEvents.RxError = OnRxError;

    // Initialize the radio with the events
    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,TX_TIMOUT_VALUE);

    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);

    Radio.SetMaxPayloadLength(MODEM_LORA,MAX_APP_BUFFEE_SIZE);

}
/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{

  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
//  MX_DMA_Init();
  MX_SubGHz_Phy_Init();
//  MX_RTC_Init();
  /* USER CODE BEGIN 2 */
  RadioInit();
  HAL_Delay(1000);


Radio.Send((uint8_t *)BufferTx,sizeof(BufferTx));
//  Radio.Rx(RX_TIMOUT_VALUE);
//  Radio.RxBoosted(RX_TIMOUT_VALUE);
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {

	//  HAL_Delay(1000);
//	  rxDone=0;
//	  rxTimout=0;
//	  txTimout=0;
//	  txDone=0;
//	  rxerror=0;



    /* USER CODE END WHILE */
//    MX_SubGHz_Phy_Process();

    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Configure LSE Drive Capability
  */
  HAL_PWR_EnableBkUpAccess();
  __HAL_RCC_LSEDRIVE_CONFIG(RCC_LSEDRIVE_LOW);

  /** Configure the main internal regulator output voltage
  */
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE|RCC_OSCILLATORTYPE_MSI;
  RCC_OscInitStruct.LSEState = RCC_LSE_ON;
  RCC_OscInitStruct.MSIState = RCC_MSI_ON;
  RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_11;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  /** Configure the SYSCLKSource, HCLK, PCLK1 and PCLK2 clocks dividers
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK3|RCC_CLOCKTYPE_HCLK
                              |RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1
                              |RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.AHBCLK3Divider = RCC_SYSCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
  {
    Error_Handler();
  }
}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */
  __disable_irq();
  while (1)
  {
  }
  /* USER CODE END Error_Handler_Debug */
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @PAram  file: pointer to the source file name
  * @PAram  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

[STTwo-32]

Hello @hashara 

I don't think you've followed exactly the same implementation of the SubGHz_Phy_PingPong but you have done your own modifications. So, my suggestion is to try to follow the exact implementation of the example (with sequencer, LPM...). Also, the AN5406 can be helpful for you. 

PS: As I've told you before, for your external module, it will be helpful for you to contact the manufacturer of the component.

Best Regards.

STTwo-32