I'm using the library in a project with a 915MHz SX1276. The initialization of the module went smoothly and I'm already receiving a message saying that the LoRa module is ready for use.
However, I'm having problems transmitting. The transmitter manages to send the signal via the LoRa_transmit command, and gets a return = 1. But the receiver doesn't receive the packet.
Why is this happening? I've configured it according to the Readme example and I've also used HAL_GPIO_EXTI_Callback in case the interrupt on the DIO pin happens.
void setup(){
DEBUG_PRINT("Starting...\r\n");
// SX1276 compatible module connected to SPI1, NSS pin connected to GPIO with label LORA_NSS
myLoRa = newLoRa();
myLoRa.CS_port = NSS_GPIO_Port;
myLoRa.CS_pin = NSS_Pin;
myLoRa.reset_port = LORA_RST_GPIO_Port;
myLoRa.reset_pin = LORA_RST_Pin;
myLoRa.DIO0_port = DIO_GPIO_Port;
myLoRa.DIO0_pin = DIO_Pin;
myLoRa.hSPIx = &hspi1;
myLoRa.frequency = 915; // default = 433 MHz
myLoRa.spredingFactor = SF_7; // default = SF_7
myLoRa.bandWidth = BW_250KHz; // default = BW_125KHz
myLoRa.crcRate = CR_4_8; // default = CR_4_5
myLoRa.power = POWER_17db; // default = 20db
myLoRa.overCurrentProtection = 130; // default = 100 mA
myLoRa.preamble = 10; // default = 8;
if(LoRa_init(&myLoRa) == LORA_OK){
DEBUG_PRINT("LoRa Ready\r\n");
}else DEBUG_PRINT("Error in LoRa connection\r\n");
LoRa_startReceiving(&myLoRa);
HAL_GPIO_WritePin(GPIOB, DEBUG_LED_Pin, GPIO_PIN_SET);
I2C_Scan();
HAL_GPIO_WritePin(GPIOB, K_Pin, GPIO_PIN_RESET);
HAL_Delay(100);
HAL_GPIO_WritePin(GPIOB, K_Pin, GPIO_PIN_SET);
HAL_Delay(1000);
HAL_GPIO_WritePin(GPIOB, K_Pin, GPIO_PIN_RESET);
//HAL_Delay(10000);
DEBUG_PRINT("Started!\r\n");
}
void loop(){
char msg[64];
uint8_t received_data[12];
uint8_t packet_size = 0;
packet_size = LoRa_receive(&myLoRa, received_data, 12);
snprintf(msg, sizeof(msg), "Res %s\r\n", received_data);
DEBUG_PRINT(msg);
}
void ShowSerialData(void)
{
uint8_t data;
while (__HAL_UART_GET_FLAG(&huart2, UART_FLAG_RXNE) != RESET) // Verifica se há dados disponíveis no UART3
{
HAL_UART_Receive(&huart2, &data, 1, HAL_MAX_DELAY); // Lê um byte do UART3
HAL_UART_Transmit(&huart1, &data, 1, HAL_MAX_DELAY); // Envia o byte lido para o UART1
}
HAL_Delay(1000); // Espera por 1 segundo
}
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin){
if(GPIO_Pin == DIO_Pin){
LoRa_receive(&myLoRa, rxBuffer, 120);
DEBUG_PRINT("RECIEVED!\r\n");
}
DEBUG_PRINT("Call!\r\n");
}
void setup() {
DEBUG_PRINT("Setup...\r\n");
I2C_Scan();
DEBUG_PRINT("\r\n");
myLoRa = newLoRa();
myLoRa.CS_port = NSS_GPIO_Port;
myLoRa.CS_pin = NSS_Pin;
myLoRa.reset_port = LoRa_RST_GPIO_Port;
myLoRa.reset_pin = LoRa_RST_Pin;
myLoRa.DIO0_port = DIO_GPIO_Port;
myLoRa.DIO0_pin = DIO_Pin;
myLoRa.hSPIx = &hspi1;
myLoRa.frequency = 915; // default = 433 MHz
myLoRa.spredingFactor = SF_7; // default = SF_7
myLoRa.bandWidth = BW_250KHz; // default = BW_125KHz
myLoRa.crcRate = CR_4_8; // default = CR_4_5
myLoRa.power = POWER_17db; // default = 20db
myLoRa.overCurrentProtection = 130; // default = 100 mA
myLoRa.preamble = 10; // default = 8;
if(LoRa_init(&myLoRa) == LORA_OK){
DEBUG_PRINT("LoRa Ready\r\n");
}else DEBUG_PRINT("Error in LoRa connection\r\n");
if (KX122_Init(&hspi2) != HAL_ERROR)
DEBUG_PRINT("KX122 Ready\r\n");
else
DEBUG_PRINT("Error in KX122 connection\r\n");
if (MCP9808_Init(&hi2c1) != HAL_ERROR)
DEBUG_PRINT("MCP9808 Ready\r\n");
else
DEBUG_PRINT("Error in MCP9808 connection\r\n");
if (MAX17048_Init(&hi2c1) != HAL_ERROR)
DEBUG_PRINT("MAX17048 Ready\r\n");
else
DEBUG_PRINT("Error in MAX17048 connection\r\n");
if (FRAM_Init(&hi2c1) != HAL_ERROR)
DEBUG_PRINT("FRAM Ready\r\n");
else
DEBUG_PRINT("Error in FRAM connection\r\n");
DEBUG_PRINT("Ready!\r\n");
if(KX122_CheckCommunication(&hi2c1) != HAL_ERROR)
DEBUG_PRINT("WHO I AM KX122 Ready\r\n");
FRAM_InitMetadata(&metadata);
package_factor = 3
* ceil((float) (SAMPLES) / (float) TRANSMISSION_DATA_PACKAGE);
data_sender_period = round(
1000 * ((float) DATA_TRANSMISSION_PERIOD / (float) package_factor));
acc_sample_factor = floor((float) ACC_DATA_RATE / (float) SAMPLES);
sampling_period_us = round(1000000 * (1.0 / (float) SAMPLES)); //488.28
//sampling_period_us = round(1000000 * (1.0 / (float) ACC_DATA_RATE));
//sampling_period_us *= acc_sample_factor;
DEBUG_PRINT("package_factor:\r\n");
printFloat(package_factor);
DEBUG_PRINT("data_sender_period:\r\n");
printFloat(data_sender_period);
DEBUG_PRINT("sampling_period_us:\r\n");
printFloat(sampling_period_us);
DEBUG_PRINT("acc_sample_factor:\r\n");
printFloat(acc_sample_factor);
DEBUG_PRINT("\r\n");
sizeInBytes = FRAM_MEMORY_SIZE;
writeVibrationInformation();
}
void loop() {
//HAL_GPIO_WritePin(GPIOB, GPIO_PIN_3, GPIO_PIN_SET);
//HAL_GPIO_WritePin(GPIOB, GPIO_PIN_3, GPIO_PIN_RESET);
char* send_data;
send_data = "Hello world!";
if(LoRa_transmit(&myLoRa, (uint8_t*)send_data, 12, 100) == 1){
DEBUG_PRINT("Success!\r\n");
}else DEBUG_PRINT("Fail!\r\n");
DEBUG_PRINT("Sanded!\r\n");
HAL_Delay(5000);writeVibrationInformation();
}
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_I2C1_Init();
MX_SPI1_Init();
MX_USART1_UART_Init();
MX_USART2_UART_Init();
/* USER CODE BEGIN 2 */
setup();
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
loop();
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
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