Arduino drive Lora module master node

1、LoRa Module configuration

I bought the module punctual atom Lora sx1278 Use serial port protocol to realize data transmission , It's convenient to configure it .

This is the attached upper computer software , According to the manual given by the merchant, configure it in minutes according to your own needs .

matters needing attention ：

（1） The transmission power should not be too high , It will cause the signal to be too accurate , Not easy to receive .

（2） Module address 、 The communication channel and baud rate should be consistent .

（3） When it comes to configuration , The baud rate above must be selected 115200, Otherwise it will prompt Connection timeout .

2、Arduino uno Code

#include <SoftwareSerial.h> / Soft string oral documents 
#include <dht11.h> // Import dht11 The header file 

#define DhtPIN A0 //dht11 Controlled port 

SoftwareSerial LoRa_Serial(2, 3); 	// RX, TX // Simulate a soft serial port , The development board accepts LoRa The signal received by the module 
dht11 DHT11; 						// Substantiation dht11 Class , Name it ：DHT11
String comdata = "";                // The received string 
char str_chk[] = "chk =";
char str_temp[] = "temp =";
char str_hum[] = "Hum =";
long previousMillis = millis();     // Last activation time 
long interval = 5000;               // interval 

void Receive_Data() {
    
  while (LoRa_Serial.available() > 0) {
    	// Come here with the data 
    comdata += char(LoRa_Serial.read());
    delay(2);
  }
  
  Serial.print("comdata = ");
  Serial.println(comdata);			// Print information 
  comdata = "";						// Receive information return 0
}

void Send_Data() {
    
  float res_temp = 0.0;
  float res_hum = 0.0;

  DHT11.read(DhtPIN);				 // Read sensor data 
  res_temp = (float)DHT11.temperature;
  res_hum = (float)DHT11.humidity;
  if (res_temp >= 0 && res_hum > 0) {
    
    LoRa_Serial.print("temp = ");// Serial port print results , Easy to observe and debug 
    LoRa_Serial.print(res_temp);// Serial port print results , Easy to observe and debug 
    LoRa_Serial.print(",Hum = ");// Serial port print results , Easy to observe and debug 
    LoRa_Serial.println(res_hum);// Serial port print results , Easy to observe and debug 
  }

}

void setup() {
    
  // put your setup code here, to run once:
  pinMode(DhtPIN, OUTPUT);  // Set up dht11 Port mode is output 

  Serial.begin(9600);// Initialize port continuous communication from baud rate 9600 Start 
  Serial.println("hardware seriall!");
  Serial.begin(9600);
  Serial.println("software serial!");
}

void loop() {
    
  // put your main code here, to run repeatedly:
  if (LoRa_Serial.available()) {
    
    Receive_Data();
  }
  if (millis() - previousMillis > interval) {
    
    Send_Data();
    previousMillis = millis();
  }
}