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#define DEBUG
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#include <Wire.h>
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#include <LiquidCrystal_I2C.h>
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#include <WiFi.h>
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#include <ThingerESP32.h>
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#include <HardwareSerial.h>
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// Initialize I2C LCD display with address 0x27, 16 columns, and 2 rows
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LiquidCrystal_I2C lcd(0x27, 16, 2);
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// Initialize HardwareSerial for LoRa E32 on UART2
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HardwareSerial LoRaSerial(2); // Use UART2
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// Define buzzer pin
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const int buzzerPin = 12;
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// Thinger.io credentials
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#define USERNAME "akbarwijaya1701"
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#define DEVICE_ID "TAD3"
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#define DEVICE_CREDENTIAL "GN&bnQsadgJEKjPL"
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// WiFi credentials
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const char* ssid = "rodijayapap";
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const char* pass = "ps4jember";
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// Variable to store received data
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String receivedData = "Waiting for data";
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// Variables to store SNR, RSSI, and Delay
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float SNR = 0.0;
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int RSSI = 0;
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float delayTime = 0.0; // Use float to store delay in seconds
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// Thinger.io instance
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ThingerESP32 thing(USERNAME, DEVICE_ID, DEVICE_CREDENTIAL);
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void setup() {
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// Initialize serial communication for debugging
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Serial.begin(57600);
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// Initialize LCD
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lcd.init();
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lcd.backlight();
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// Set buzzer pin as output
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pinMode(buzzerPin, OUTPUT);
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// Initialize LoRa E32 communication on UART2
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LoRaSerial.begin(9600, SERIAL_8N1, 16, 17); // Baud rate 9600, 8 data bits, no parity, 1 stop bit
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// Connect to Wi-Fi
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WiFi.begin(ssid, pass);
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Serial.print("Connecting to WiFi...");
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while (WiFi.status() != WL_CONNECTED) {
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delay(500);
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Serial.print(".");
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}
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Serial.println();
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Serial.println("Connected to WiFi");
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// Initialize Thinger.io
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thing.add_wifi(ssid, pass);
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// Define Thinger.io resources
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thing["receivedData"] >> [](pson& out){
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out = receivedData;
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};
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thing["buzzer"] << [](pson& in){
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if (in.is_empty()) {
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in = digitalRead(buzzerPin);
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} else {
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digitalWrite(buzzerPin, in ? HIGH : LOW);
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}
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};
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// Define Thinger.io resources for SNR, RSSI, and Delay
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thing["SNR"] >> [](pson& out){
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out = SNR;
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};
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thing["RSSI"] >> [](pson& out){
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out = RSSI;
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};
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thing["delayTime"] >> [](pson& out){
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out = delayTime;
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};
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// Print initial message on LCD
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lcd.setCursor(0, 0);
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lcd.print("Waiting for data");
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// Print initial message to Serial Monitor
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Serial.println("Receiver is ready. Waiting for data...");
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}
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void loop() {
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thing.handle();
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if (LoRaSerial.available()) {
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String data = LoRaSerial.readStringUntil('\n');
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unsigned long receiveTime = millis(); // Capture the timestamp
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// Print received data to Serial Monitor
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Serial.print("Received: ");
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Serial.println(data);
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// Check if the data contains SNR, RSSI, and TIME
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int snrIndex = data.indexOf("SNR:");
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int rssiIndex = data.indexOf("RSSI:");
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int timeIndex = data.indexOf("TIME:");
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if (snrIndex != -1 && rssiIndex != -1 && timeIndex != -1) {
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String snrString = data.substring(snrIndex + 4, data.indexOf(',', snrIndex));
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String rssiString = data.substring(rssiIndex + 5, data.indexOf(',', rssiIndex));
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String timeString = data.substring(timeIndex + 5);
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// Print parsed values to Serial Monitor
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Serial.print("SNR string: ");
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Serial.println(snrString);
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Serial.print("RSSI string: ");
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Serial.println(rssiString);
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Serial.print("Time string: ");
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Serial.println(timeString);
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SNR = snrString.toFloat();
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RSSI = rssiString.toInt();
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unsigned long sendTime = timeString.toInt();
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delayTime = (receiveTime - sendTime) / 1000.0; // Convert delay to seconds
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// Remove additional information from receivedData
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receivedData = data.substring(0, snrIndex - 1);
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// Display received data on LCD
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lcd.clear();
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lcd.setCursor(0, 0);
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lcd.print(receivedData.substring(0, 16)); // Display first 16 characters on the first row
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if (receivedData.length() > 16) {
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lcd.setCursor(0, 1);
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lcd.print(receivedData.substring(16, 32)); // Display next 16 characters on the second row if available
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}
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// Print SNR, RSSI, and Delay to Serial Monitor
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Serial.print("SNR: ");
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Serial.println(SNR);
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Serial.print("RSSI: ");
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Serial.println(RSSI);
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Serial.print("Delay: ");
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Serial.println(delayTime);
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} else {
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receivedData = data;
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// Display received data on LCD
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lcd.clear();
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lcd.setCursor(0, 0);
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lcd.print(receivedData.substring(0, 16)); // Display first 16 characters on the first row
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if (receivedData.length() > 16) {
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lcd.setCursor(0, 1);
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lcd.print(receivedData.substring(16, 32)); // Display next 16 characters on the second row if available
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}
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}
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// Check for distance warning message
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if (receivedData.indexOf("WARNING: Bahaya!") != -1) {
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// Turn on the buzzer
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digitalWrite(buzzerPin, HIGH);
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} else {
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// Turn off the buzzer
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digitalWrite(buzzerPin, LOW);
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}
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} else {
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// No data received, print to Serial Monitor for debugging
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Serial.println("No data received from LoRa.");
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}
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// Brief delay to avoid overwhelming the loop
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delay(1000);
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}
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@ -0,0 +1,120 @@
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#include <LiquidCrystal_I2C.h>
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#include <SoftwareSerial.h>
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#include <HardwareSerial.h>
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// Define SoftwareSerial for sensor communication
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SoftwareSerial mySerial(25, 26); // RX, TX
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// Initialize data array and distance variable
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unsigned char data[4] = {};
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float distance;
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// Initialize I2C LCD display with address 0x27, 16 columns, and 2 rows
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LiquidCrystal_I2C lcd(0x27, 16, 2);
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// Define buzzer pin
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const int buzzerPin = 12;
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// Initialize HardwareSerial for LoRa E32 on UART2
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HardwareSerial LoRaSerial(2); // Use UART2
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void setup() {
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// Initialize serial communication for debugging
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Serial.begin(57600);
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mySerial.begin(9600);
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// Initialize LCD
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lcd.init();
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lcd.backlight();
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// Set buzzer pin as output
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pinMode(buzzerPin, OUTPUT);
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// Initialize LoRa E32 communication on UART2
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LoRaSerial.begin(9600, SERIAL_8N1, 16, 17); // Baud rate 9600, 8 data bits, no parity, 1 stop bit
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// Print initial message to Serial Monitor
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Serial.println("Sender is ready. Sending data...");
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}
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void loop() {
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// Read data from sensor
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do {
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for (int i = 0; i < 4; i++) {
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data[i] = mySerial.read();
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}
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} while (mySerial.read() == 0xff);
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mySerial.flush();
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if (data[0] == 0xff) {
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int sum = (data[0] + data[1] + data[2]) & 0x00FF;
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if (sum == data[3]) {
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distance = (data[1] << 8) + data[2];
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unsigned long sendTime = millis(); // Capture the timestamp
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int snr = random(10, 20); // Simulate SNR
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int rssi = random(-100, -30); // Simulate RSSI
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if (distance > 280) {
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// Print distance to Serial Monitor
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Serial.print("Jarak: ");
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Serial.print(distance / 10);
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Serial.println(" cm");
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// Display distance on LCD
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lcd.clear();
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lcd.setCursor(0, 0);
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lcd.print("Jarak: ");
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lcd.print(distance / 10);
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lcd.print(" cm");
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// Send distance via LoRa
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LoRaSerial.print("Jarak: ");
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LoRaSerial.print(distance / 10);
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LoRaSerial.print(" cm,SNR:");
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LoRaSerial.print(snr);
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LoRaSerial.print(",RSSI:");
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LoRaSerial.print(rssi);
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LoRaSerial.print(",TIME:");
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LoRaSerial.println(sendTime);
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// Turn off the buzzer
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digitalWrite(buzzerPin, LOW);
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} else {
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// Print warning to Serial Monitor
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Serial.println("WARNING: Bahaya! Air terlalu tinggi!");
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// Display warning on LCD
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lcd.clear();
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lcd.setCursor(0, 0);
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lcd.print("WARNING: Bahaya!");
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lcd.setCursor(0, 1);
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lcd.print("Air Tinggi");
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// Send warning via LoRa
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LoRaSerial.print("WARNING: Bahaya! Air terlalu tinggi!,SNR:");
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LoRaSerial.print(snr);
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LoRaSerial.print(",RSSI:");
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LoRaSerial.print(rssi);
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LoRaSerial.print(",TIME:");
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LoRaSerial.println(sendTime);
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// Turn on the buzzer
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digitalWrite(buzzerPin, HIGH);
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}
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} else {
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// Print error to Serial Monitor
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Serial.println("ERROR");
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// Display error on LCD
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lcd.clear();
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lcd.print("ERROR");
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// Send error via LoRa
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LoRaSerial.println("ERROR");
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}
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}
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// Brief delay between measurements
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delay(150);
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}
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