| description | title | keywords | image | slug | last_update | |||||
|---|---|---|---|---|---|---|---|---|---|---|
LoRa® |
LoRa® |
|
/SenseCAP_Indicator_ESP32_LoRa |
|
The SenseCAP indicator is embedded with SX1262 LoRa® module, which can realize the p2p communication.
This example code demonstrates a basic example of how to use the LoRa® radio module in transmit mode to send data packets in LoRa® mode. It defines the frequency, bandwidth, spreading factor, coding rate, preamble length, and other parameters of the LoRa® modulation scheme.
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "esp_log.h"
#include "radio.h"
#include "bsp_board.h"
#define RF_FREQUENCY 868000000 // Hz
#define LORA_BANDWIDTH 0 // [0: 125 kHz,
// 1: 250 kHz,
// 2: 500 kHz,
// 3: Reserved]
#define LORA_SPREADING_FACTOR 12 // [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
static RadioEvents_t RadioEvents;
static const char *TAG = "app_main";
void OnTxDone( void )
{
ESP_LOGI(TAG, "OnTxDone");
}
void demo_lora_tx(void)
{
int cnt = 0;
ESP_LOGI(TAG, "system start");
ESP_LOGI(TAG, "demo lora tx");
ESP_ERROR_CHECK(bsp_board_init());
RadioEvents.TxDone = OnTxDone;
Radio.Init( &RadioEvents );
Radio.SetChannel( RF_FREQUENCY );
Radio.SetTxConfig( MODEM_LORA,22, 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.SetMaxPayloadLength( MODEM_LORA, 255 );
while(1) {
printf("send... %d\n", cnt++);
Radio.Send( "1234567890", sizeof("1234567890") );
vTaskDelay(5000 / portTICK_PERIOD_MS);
}
}This example code sets up a LoRa® receiver using the SX126x radio module and logs the received packets to the console. It can be used as a starting point for developing LoRa® applications that require receiving data over long distances with low power consumption.
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "esp_log.h"
#include "radio.h"
#include "bsp_board.h"
#define RF_FREQUENCY 868000000 // Hz
#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 5 // Symbols
#define LORA_FIX_LENGTH_PAYLOAD_ON false
#define LORA_IQ_INVERSION_ON false
static RadioEvents_t RadioEvents;
static const char *TAG = "app_main";
void OnRxDone( uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr )
{
int i = 0;
ESP_LOGI(TAG, "rssi:%d dBm, snr:%d dB, len:%d, payload:", rssi, snr, size);
for( i = 0; i < size; i++) {
printf("0x%x ",payload[i] );
}
printf("\n");
}
void demo_lora_rx(void)
{
int cnt = 0;
ESP_LOGI(TAG, "system start");
ESP_LOGI(TAG, "demo lora rx continue");
bsp_sx126x_init();
RadioEvents.RxDone = OnRxDone;
Radio.Init( &RadioEvents );
Radio.SetChannel( RF_FREQUENCY );
Radio.SetTxConfig( MODEM_LORA,22, 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 );
Radio.SetMaxPayloadLength( MODEM_LORA, 255 );
Radio.Rx( 0 );
while(1) {
printf("cnt: %d\n", cnt++);
vTaskDelay(10000 / portTICK_PERIOD_MS);
}
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