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489-4-1(게이트웨이).txt
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489-4-1(게이트웨이).txt
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#include <SPI.h> // include libraries
#include <LoRa.h>
//920.9Mhz
const long frequency = 9209E5;
void setup() {
Serial.begin(115200); // initialize serial
//NSS(D10), RST(D9), DIO0(D3)
LoRa.setPins(D8, D1, D2);
if (!LoRa.begin(frequency)) {
Serial.println("LoRa init failed. Check your connections.");
while (true); // if failed, do nothing
}
//LoRa.setTxPower(20);
Serial.println("LoRa init succeeded.");
Serial.println();
Serial.println("LoRa Simple Gateway");
Serial.println("Only receive messages from nodes");
Serial.println("Tx: invertIQ enable");
Serial.println("Rx: invertIQ disable");
Serial.println();
LoRa.onReceive(onReceive);
LoRa.onTxDone(onTxDone);
LoRa_rxMode();
}
void loop() {
//5초에 한번 실행된다~
if (runEvery(5000)) { // repeat every 5000 millis
String message = "HeLoRa World! ";
message += "I'm a Gateway! ";
message += millis();
LoRa_sendMessage(message); // send a message
//1.TX모드로 전환한다
//2.메시지를 LoRa로 전송한다
//3.Rx모드로 전환한다
Serial.println("Send Message!");
}
}
//수신모드
void LoRa_rxMode(){
LoRa.disableInvertIQ(); // normal mode
LoRa.receive();
}
//송신모드
void LoRa_txMode(){
LoRa.idle(); // set standby mode
LoRa.enableInvertIQ(); // active invert I and Q signals
}
void LoRa_sendMessage(String message) {
LoRa_txMode(); // set tx mode
LoRa.beginPacket(); // start packet
LoRa.print(message); // add payload
LoRa.endPacket(true); // finish packet and send it
}
void onReceive(int packetSize) {
String message = "";
while (LoRa.available()) {
message += (char)LoRa.read();
}
Serial.print("Gateway Receive: ");
Serial.println(message);
}
void onTxDone() {
Serial.println("TxDone");
LoRa_rxMode();
}
boolean runEvery(unsigned long interval)
{
static unsigned long previousMillis = 0;
unsigned long currentMillis = millis();
if (currentMillis - previousMillis >= interval)
{
previousMillis = currentMillis;
return true;
}
return false;
}