#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <WiFi.h>
#include <WebServer.h>
#include <Preferences.h>
#include <HTTPClient.h>
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
#define NUM_SAMPLES 500
#define VREF 3.3
#define ADC_RES 4095.0
#define noiseThreshold 0.5
#define voltageCalibration 312.0
const int pinUPS1 = 32;
const int pinUPS2 = 33;
const int pinPLN = 34;
const int pinGENSET = 35;
float vUPS1 = 0, vUPS2 = 0, vPLN = 0, vGENSET = 0;
Preferences preferences;
WebServer server(80);
String ssid, password;
String ipStr = "", gwStr = "", subnetStr = "";
int serverPort = 80;
String targetIP = "192.168.1.2";
String msgUPS1 = "UPS1 MATI";
String msgUPS2 = "UPS2 MATI";
String msgPLN = "PLN MATI";
String msgGENSET = "GENSET MATI";
bool ups1Sent = false, ups2Sent = false, plnSent = false, gensetSent = false;
// Fungsi membaca tegangan AC dari pin tertentu
float readVoltageAC(int pin) {
float offset = 0;
for (int i = 0; i < NUM_SAMPLES; i++) offset += analogRead(pin);
offset /= NUM_SAMPLES;
float sumSq = 0;
for (int i = 0; i < NUM_SAMPLES; i++) {
float val = analogRead(pin);
float centered = val - offset;
sumSq += centered * centered;
delayMicroseconds(100);
}
float rms = sqrt(sumSq / NUM_SAMPLES);
float voltageADC = (rms / ADC_RES) * VREF;
float acVoltage = voltageADC * voltageCalibration;
return acVoltage < noiseThreshold ? 0.0 : acVoltage;
}
// Tampilkan halaman web
void handleRoot() {
String html = "<!DOCTYPE html><html><head><meta charset='UTF-8'>"
"<style>"
"body { font-family: Arial, sans-serif; background:#f9f9f9; margin:0; padding:20px; }"
".container { max-width: 600px; margin: auto; background: white; padding: 20px; border-radius: 10px; box-shadow: 0 2px 10px rgba(0,0,0,0.1); }"
"h1 { font-size: 22px; color: #333; }"
"form input[type='text'], form input[type='password'], form input[type='number'] { width: 100%; padding: 8px; margin: 5px 0 10px 0; border: 1px solid #ccc; border-radius: 5px; }"
"form input[type='submit'] { background-color: #4CAF50; color: white; border: none; padding: 10px 20px; border-radius: 5px; cursor: pointer; font-size: 16px; }"
"form input[type='submit']:hover { background-color: #45a049; }"
".section { margin-top: 30px; }"
".nilai { font-size: 24px; font-weight: bold; color: #222; margin: 10px 0; }"
".off { color: red; font-weight: bold; }"
"</style></head><body>";
html += "<div class='container'>";
html += "<h1>PUTU-TECKNO - WiFi & Notifikasi Settings</h1>";
html += "<form action='/save' method='post'>"
"SSID:<br><input type='text' name='ssid'><br>"
"Password:<br><input type='password' name='password'><br>"
"IP Address:<br><input type='text' name='ip' value='" + ipStr + "'><br>"
"Gateway:<br><input type='text' name='gw' value='" + gwStr + "'><br>"
"Subnet:<br><input type='text' name='subnet' value='" + subnetStr + "'><br>"
"Port:<br><input type='number' name='port' value='" + String(serverPort) + "'><br>"
"Target IP Notifikasi:<br><input type='text' name='target_ip' value='" + targetIP + "'><br>"
"Pesan UPS1:<br><input type='text' name='msg_ups1' value='" + msgUPS1 + "'><br>"
"Pesan UPS2:<br><input type='text' name='msg_ups2' value='" + msgUPS2 + "'><br>"
"Pesan PLN:<br><input type='text' name='msg_pln' value='" + msgPLN + "'><br>"
"Pesan GENSET:<br><input type='text' name='msg_genset' value='" + msgGENSET + "'><br>"
"<input type='submit' value='Save Settings'></form>";
html += "<div class='section'><h1>Monitoring Tegangan Server</h1>";
html += "<div class='nilai'>UPS1: " + String(vUPS1 < 50.0 ? "<span class='off'>OFF</span>" : String(vUPS1, 1) + "V") + "</div>";
html += "<div class='nilai'>UPS2: " + String(vUPS2 < 50.0 ? "<span class='off'>OFF</span>" : String(vUPS2, 1) + "V") + "</div>";
html += "<div class='nilai'>PLN: " + String(vPLN < 50.0 ? "<span class='off'>OFF</span>" : String(vPLN, 1) + "V") + "</div>";
html += "<div class='nilai'>GENSET: " + String(vGENSET < 50.0 ? "<span class='off'>OFF</span>" : String(vGENSET, 1) + "V") + "</div>";
html += "</div></div></body></html>";
server.send(200, "text/html", html);
}
// Simpan konfigurasi dari form
void handleSave() {
ssid = server.arg("ssid");
password = server.arg("password");
ipStr = server.arg("ip");
gwStr = server.arg("gw");
subnetStr = server.arg("subnet");
serverPort = server.arg("port").toInt();
targetIP = server.arg("target_ip");
msgUPS1 = server.arg("msg_ups1");
msgUPS2 = server.arg("msg_ups2");
msgPLN = server.arg("msg_pln");
msgGENSET = server.arg("msg_genset");
preferences.begin("wifi", false);
preferences.putString("ssid", ssid);
preferences.putString("password", password);
preferences.putString("ip", ipStr);
preferences.putString("gw", gwStr);
preferences.putString("subnet", subnetStr);
preferences.putInt("port", serverPort);
preferences.putString("targetIP", targetIP);
preferences.putString("msgUPS1", msgUPS1);
preferences.putString("msgUPS2", msgUPS2);
preferences.putString("msgPLN", msgPLN);
preferences.putString("msgGENSET", msgGENSET);
preferences.end();
server.send(200, "text/html", "<html><body><h1>Saved! Restarting...</h1></body></html>");
delay(2000);
ESP.restart();
}
// Setup WiFi dan baca konfigurasi tersimpan
void setupWiFi() {
preferences.begin("wifi", true);
ssid = preferences.getString("ssid", "");
password = preferences.getString("password", "");
ipStr = preferences.getString("ip", "");
gwStr = preferences.getString("gw", "");
subnetStr = preferences.getString("subnet", "");
serverPort = preferences.getInt("port", 80);
targetIP = preferences.getString("targetIP", "192.168.1.2");
msgUPS1 = preferences.getString("msgUPS1", "UPS1 MATI");
msgUPS2 = preferences.getString("msgUPS2", "UPS2 MATI");
msgPLN = preferences.getString("msgPLN", "PLN MATI");
msgGENSET = preferences.getString("msgGENSET", "GENSET MATI");
preferences.end();
if (ssid != "") {
if (ipStr != "" && gwStr != "" && subnetStr != "") {
IPAddress ip, gw, sn;
ip.fromString(ipStr); gw.fromString(gwStr); sn.fromString(subnetStr);
WiFi.config(ip, gw, sn);
}
WiFi.begin(ssid.c_str(), password.c_str());
for (int i = 0; i < 10; i++) {
if (WiFi.status() == WL_CONNECTED) break;
delay(500);
}
}
if (WiFi.status() != WL_CONNECTED) {
WiFi.softAP("PUTU@TECKNO-4AC", "rejeki88");
}
server.on("/", handleRoot);
server.on("/save", HTTP_POST, handleSave);
server.begin(serverPort);
}
// Inisialisasi
void setup() {
Serial.begin(115200);
analogReadResolution(12);
if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
Serial.println(F("OLED tidak ditemukan")); while (1);
}
display.clearDisplay();
display.setTextColor(WHITE);
display.setTextSize(1);
display.setCursor(10, 10);
display.println("Monitoring 4 Tegangan...");
display.display();
delay(1500);
setupWiFi();
}
// Loop utama monitoring dan notifikasi
void loop() {
vUPS1 = readVoltageAC(pinUPS1);
vUPS2 = readVoltageAC(pinUPS2);
vPLN = readVoltageAC(pinPLN);
vGENSET = readVoltageAC(pinGENSET);
display.clearDisplay();
display.setTextSize(1);
display.setCursor(0, 0);
display.printf("UPS1 : %s\n", vUPS1 < 50.0 ? "OFF" : String(vUPS1, 1).c_str());
display.setCursor(0, 16);
display.printf("UPS2 : %s\n", vUPS2 < 50.0 ? "OFF" : String(vUPS2, 1).c_str());
display.setCursor(0, 32);
display.printf("PLN : %s\n", vPLN < 50.0 ? "OFF" : String(vPLN, 1).c_str());
display.setCursor(0, 48);
display.printf("GENSET : %s\n", vGENSET < 50.0 ? "OFF" : String(vGENSET, 1).c_str());
display.display();
server.handleClient();
if (WiFi.status() == WL_CONNECTED) {
HTTPClient http;
if (vUPS1 < 50.0 && !ups1Sent) {
http.begin("http://" + targetIP + "/notif?src=" + msgUPS1); http.GET(); http.end(); ups1Sent = true;
} else if (vUPS1 >= 50.0) ups1Sent = false;
if (vUPS2 < 50.0 && !ups2Sent) {
http.begin("http://" + targetIP + "/notif?src=" + msgUPS2); http.GET(); http.end(); ups2Sent = true;
} else if (vUPS2 >= 50.0) ups2Sent = false;
if (vPLN < 50.0 && !plnSent) {
http.begin("http://" + targetIP + "/notif?src=" + msgPLN); http.GET(); http.end(); plnSent = true;
} else if (vPLN >= 50.0) plnSent = false;
if (vGENSET < 50.0 && !gensetSent) {
http.begin("http://" + targetIP + "/notif?src=" + msgGENSET); http.GET(); http.end(); gensetSent = true;
} else if (vGENSET >= 50.0) gensetSent = false;
}
delay(1000);
}
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