สร้างระบบควบคุมเครื่องใช้ไฟฟ้าไร้สายระยะไกลด้วยมือถือผ่าน Arduino และ LoRa (ไม่ต้องง้อ Wi-Fi!)

#include <LiquidCrystal_I2C.h>
#include <SoftwareSerial.h>

#define REPLY_TIMEOUT_IN_MS 300
#define REPLY_END_CHAR '\n'
#define SELF_ADDRESS 0
#define TARGET_ADDRESS 1
#define MIN_CHAR_TO_RCV 1
#define WAIT_FOR_TARGET_REPLY 3000

#define START_CHAR_BT_COMM '*'
#define END_CHAR_BT_COMM '#'
#define START_CHAR_TIME_OUT_BT_COMM (3000U)
#define END_CHAR_TIME_OUT_BT_COMM (300U)

String sCMDLampON = "L1";
String sCMDLampOFF = "L0";
String sCMDFanON = "F1";
String sCMDFanOFF = "F0";
String receivedCommand;

SoftwareSerial btSerial(3, 2);
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  Serial.begin(115200);
  btSerial.begin(115200);
  btSerial.setTimeout(END_CHAR_TIME_OUT_BT_COMM);
  
  lcd.init();
  lcd.backlight();
  lcd.clear();
  
  receivedCommand.reserve(50);
  flushBuffer();
  
  // Initialize LoRa defaults
  bool boRetVal = boRestoreFactoryDefaults();
  if (boRetVal == true) {
    flushBuffer();
    boRetVal = boSetAddress();
  }
  
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print(boRetVal ? "Module Init" : "Module Init");
  lcd.setCursor(0, 1);
  lcd.print(boRetVal ? "Successful" : "Failed");
  if (!boRetVal) while(1);
  delay(1000);
}

void loop() {
  String expected_reply = "DONE";
  bool boRetVal = false;
  flushBuffer();
  
  boRetVal = rcvCommand(START_CHAR_TIME_OUT_BT_COMM);
  if (boRetVal == false) {
    lcd.clear(); lcd.setCursor(0, 0); lcd.print("No BT Command");
  } else {
    if (receivedCommand == sCMDLampON || receivedCommand == sCMDLampOFF || 
        receivedCommand == sCMDFanON || receivedCommand == sCMDFanOFF) {
        
      boRetVal = boSendData(receivedCommand);
      if (boRetVal == true) {
        lcd.clear(); lcd.setCursor(0, 0); lcd.print("Cmd Rcvd & Sent");
        delay(1000);
        boRetVal = chkReply(expected_reply, REPLY_END_CHAR, WAIT_FOR_TARGET_REPLY);
        
        lcd.clear(); lcd.setCursor(0, 0);
        lcd.print(boRetVal ? "Reply Received:" : "No Reply");
        lcd.setCursor(0, 1);
        lcd.print(boRetVal ? expected_reply : "Received");
      }
    }
  }
}
// (ฟังก์ชันการทำงานส่วนเชื่อมต่อ LoRa และรับส่ง Serial เพิ่มเติมอิงจากไฟล์ต้นฉบับ)

#include <LiquidCrystal_I2C.h>

#define REPLY_TIMEOUT_IN_MS 300
#define REPLY_END_CHAR '\n'
#define CMD_END_CHAR '\n'
#define MODULE_ADDRESS 1
#define CONTROLLER_ADDRESS 0
#define MIN_CHAR_TO_RCV 1
#define WAIT_FOR_REQUEST 3000

String sCMDLampON = "L1";
String sCMDLampOFF = "L0";
String sCMDFanON = "F1";
String sCMDFanOFF = "F0";
String receivedCommand;

LiquidCrystal_I2C lcd(0x27, 16, 2);

#define LAMP_CTRL_PIN 11
#define FAN_CTRL_PIN 12
#define LAMP_ON() digitalWrite(LAMP_CTRL_PIN, 0)
#define LAMP_OFF() digitalWrite(LAMP_CTRL_PIN, 1)
#define FAN_ON() digitalWrite(FAN_CTRL_PIN, 0)
#define FAN_OFF() digitalWrite(FAN_CTRL_PIN, 1)

void setup() {
  Serial.begin(115200);
  lcd.init();
  lcd.backlight();
  lcd.clear();
  
  pinMode(LAMP_CTRL_PIN, OUTPUT);
  pinMode(FAN_CTRL_PIN, OUTPUT);
  LAMP_OFF();
  FAN_OFF();
  
  receivedCommand.reserve(50);
  delay(1000);
  flushBuffer();
  
  bool boRetVal = boRestoreFactoryDefaults();
  if (boRetVal == true) {
    flushBuffer();
    boRetVal = boSetAddress();
  }
}

void loop() {
  String expected_reply = "DONE";
  bool boRetVal = false;
  
  boRetVal = rcvCommand(CMD_END_CHAR, WAIT_FOR_REQUEST);
  if (boRetVal == false) {
    lcd.clear(); lcd.setCursor(0, 0); lcd.print("No Command");
  } else {
    if (receivedCommand == sCMDLampON || receivedCommand == sCMDLampOFF || 
        receivedCommand == sCMDFanON || receivedCommand == sCMDFanOFF) {
        
      vImplementTask(receivedCommand); // ควบคุม Relay
      
      lcd.clear(); lcd.setCursor(0, 0); lcd.print("Task Done");
      delay(1000);
      
      boRetVal = boSendData(expected_reply); // ส่ง DONE กลับ
    }
  }
}

void vImplementTask(String data) {
  if (data == sCMDLampON) { LAMP_ON(); } 
  else if (data == sCMDLampOFF) { LAMP_OFF(); } 
  else if (data == sCMDFanON) { FAN_ON(); } 
  else if (data == sCMDFanOFF) { FAN_OFF(); }
}
// (ฟังก์ชันการทำงานส่วนเชื่อมต่อ LoRa เพิ่มเติมอิงจากไฟล์ต้นฉบับ)