DTMF X IOT CONTROLER 4 CH ~ Belajar Elektro

KODE PROGRAM DTMF X IOT 4 CH

ESP32 lolin Lite dan MT8070

KONTROL DTMF 4 CHANEL DENGAN ESP32 LOLIN LITE LAYAR 0.96 SPI WEB SERVER

3.3V -------------------------- OLED VCC

GND -------------------------- OLED GND

GPIO18 (SPI CLK) -------------- OLED D0 (SCK)

GPIO23 (SPI MOSI) ------------- OLED D1 (MOSI)

GPIO5 ------------------------ OLED RES

GPIO17 ------------------------ OLED DC

GPIO16 ------------------------ OLED CS

5V -------------------------- MT8870 VCC

GND -------------------------- MT8870 GND

GPIO32 ------------------------ MT8870 Q1

GPIO33 ------------------------ MT8870 Q2

GPIO25 ------------------------ MT8870 Q3

GPIO26 ------------------------ MT8870 Q4

GPIO27 ------------------------ MT8870 StQ

GPIO4 ------------------------ Relay 1 IN

GPIO13 ------------------------ Relay 2 IN

GPIO14 ------------------------ Relay 3 IN

GPIO12 ------------------------ Relay 4 IN

5V ------------------------ Relay VCC (pastikan sesuai modul)

GND ------------------------ Relay GND

GPIO19 ------------------------ Buzzer +

GND ------------------------ Buzzer –

KODE PROGRAM :

#include <SPI.h>

#include <Adafruit_GFX.h>

#include <Adafruit_SSD1306.h>

#include <WiFi.h>

#include <WebServer.h>

#include <Preferences.h> // untuk menyimpan status relay

// ===== OLED SPI Pins =====

#define OLED_MOSI 23

#define OLED_CLK 18

#define OLED_RESET 5

#define OLED_DC 17

#define OLED_CS 16

#define SCREEN_WIDTH 128

#define SCREEN_HEIGHT 64

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &SPI, OLED_DC, OLED_RESET, OLED_CS);

// ===== DTMF MT8870 input =====

const int dtmfPins[4] = {32, 33, 25, 26}; // Q1..Q4

const int stqPin = 27; // data valid StQ

// ===== Relay pins =====

const int relays[4] = {4, 13, 14, 12};

bool relayState[4] = {false, false, false, false};

// ===== Buzzer =====

const int buzzerPin = 19;

// ===== WiFi Station =====

const char* ssid = "Tes123"; // Ganti dengan nama WiFi rumahmu

const char* password = "1234Dcba12"; // Ganti dengan password WiFi

// ===== Web server on port 80 =====

WebServer server(80);

// ===== Preferences (EEPROM emulasi) =====

Preferences preferences;

const char* prefNamespace = "relay_states"; // nama namespace

const char* prefKey = "states"; // kunci penyimpanan

int lastDTMF = -1;

// ===== Fungsi pembantu =====

char decodeDTMF(int value) {

switch (value) {

case 0x1: return '1';

case 0x2: return '2';

case 0x3: return '3';

case 0x4: return '4';

case 0x5: return '5';

case 0x6: return '6';

case 0x7: return '7';

case 0x8: return '8';

case 0x9: return '9';

case 0xA: return '0';

case 0xB: return '*';

case 0xC: return '#';

default: return '?';

}

void buzz(int frequency, int duration) {

tone(buzzerPin, frequency, duration);

delay(duration);

noTone(buzzerPin);

}

void playNokiaMelody() {

int melody[] = {

659, 659, 0, 659, 0, 523, 659, 784,

0, 392, 0, 523, 0, 392, 0

};

int noteDurations[] = {

150, 150, 100, 150, 100, 150, 150, 300,

150, 300, 150, 150, 150, 150, 300

};

for (int i = 0; i < sizeof(melody)/sizeof(int); i++) {

if (melody[i] == 0) {

noTone(buzzerPin);

} else {

tone(buzzerPin, melody[i], noteDurations[i]);

}

delay(noteDurations[i] + 20);

}

noTone(buzzerPin);

}

void playRelayTone(int relayIndex, bool isOn) {

// Nada berbeda tiap relay untuk ON dan OFF

int freqOn[4] = {523, 587, 659, 698}; // C5, D5, E5, F5

int freqOff[4] = {349, 330, 294, 262}; // F4, E4, D4, C4

if (isOn) {

buzz(freqOn[relayIndex], 150);

} else {

buzz(freqOff[relayIndex], 150);

}

void displayCenteredText(const char* line1, const char* line2) {

display.clearDisplay();

display.setTextColor(SSD1306_WHITE);

display.setTextSize(1);

int16_t x1, y1;

uint16_t w, h;

display.getTextBounds(line1, 0, 0, &x1, &y1, &w, &h);

int16_t xPos1 = (SCREEN_WIDTH - w) / 2;

display.getTextBounds(line2, 0, 0, &x1, &y1, &w, &h);

int16_t xPos2 = (SCREEN_WIDTH - w) / 2;

int16_t yPos1 = (SCREEN_HEIGHT / 2) - 9;

int16_t yPos2 = yPos1 + 10;

display.setCursor(xPos1, yPos1);

display.print(line1);

display.setCursor(xPos2, yPos2);

display.print(line2);

display.display();

}

void displayStatus(char key) {

display.clearDisplay();

display.setCursor(0, 0);

display.setTextSize(1);

display.setTextColor(SSD1306_WHITE);

display.print("Key: ");

display.println(key);

display.println("PILIHAN ONLINE:");

for (int i = 0; i < 4; i++) {

display.print("[");

display.print(i + 1);

display.print("] ");

display.println(relayState[i] ? "ON " : "OFF");

}

display.print("IP: ");

display.println(WiFi.localIP());

display.display();

}

void updateRelays() {

for (int i = 0; i < 4; i++) {

digitalWrite(relays[i], relayState[i] ? HIGH : LOW);

}

void saveRelayStates() {

uint8_t b = 0;

for (int i = 0; i < 4; i++) {

if (relayState[i]) {

b |= (1 << i);

}

preferences.putUInt(prefKey, b);

}

void loadRelayStates() {

uint32_t b = preferences.getUInt(prefKey, 0);

for (int i = 0; i < 4; i++) {

relayState[i] = (b & (1 << i)) != 0;

}

// ===== Web UI handler =====

String generateWebPage() {

String page = R"rawliteral(

<!DOCTYPE html>

<head>

<title>ESP32 Relay Control</title>

<style>

body {

font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;

background: #121212;

color: #eee;

margin: 0;

padding: 20px;

text-align: center;

}

h2 {

color: #00cc66;

}

.relay-container {

display: flex;

justify-content: center;

flex-wrap: wrap;

gap: 15px;

margin-top: 20px;

}

.relay {

background: #333;

border-radius: 8px;

box-shadow: 0 0 8px #00cc66;

padding: 20px 30px;

min-width: 120px;

cursor: pointer;

transition: background 0.3s ease, color 0.3s ease;

user-select: none;

font-weight: 600;

font-size: 1.1em;

}

.relay:hover {

background: #00cc66;

color: #111;

}

.relay.on {

background: #00cc66;

color: #111;

box-shadow: 0 0 12px #00cc66;

}

a {

text-decoration: none;

color: inherit;

display: block;

font-weight: bold;

}

footer {

margin-top: 40px;

font-size: 0.9em;

color: #666;

}

</style>

</head>

<body>

<h2>PILIHAN ONLINE</h2>

)rawliteral";

for (int i = 0; i < 4; i++) {

page += "<div class=\"relay ";

page += (relayState[i] ? "on" : "");

page += "\"><a href=\"/relay";

page += String(i + 1);

page += "_";

page += (relayState[i] ? "off" : "on");

page += "\">Relay ";

page += String(i + 1);

page += "<br>";

page += (relayState[i] ? "ON" : "OFF");

page += "</a></div>";

}

page += R"rawliteral(

</div>

<footer>IP: )rawliteral";

page += WiFi.localIP().toString();

page += R"rawliteral(

</footer>

</body>

</html>

)rawliteral";

return page;

}

void handleRoot() {

server.send(200, "text/html", generateWebPage());

}

void handleRelay(int idx, bool turnOn) {

relayState[idx] = turnOn;

updateRelays();

saveRelayStates();

displayStatus('*'); // refresh OLED dengan tanda '*'

playRelayTone(idx, turnOn);

server.sendHeader("Location", "/");

server.send(302, "text/plain", "");

}

void setupWebHandlers() {

server.on("/", HTTP_GET, handleRoot);

for (int i = 0; i < 4; i++) {

String onPath = "/relay" + String(i + 1) + "_on";

String offPath = "/relay" + String(i + 1) + "_off";

server.on(onPath.c_str(), HTTP_GET, [i]() {

handleRelay(i, true);

});

server.on(offPath.c_str(), HTTP_GET, [i]() {

handleRelay(i, false);

});

}

server.begin();

}

void setup() {

Serial.begin(115200);

// OLED init

SPI.begin(OLED_CLK, -1, OLED_MOSI, OLED_CS);

if (!display.begin(SSD1306_SWITCHCAPVCC)) {

Serial.println("OLED FAILED");

while(true);

}

pinMode(buzzerPin, OUTPUT);

digitalWrite(buzzerPin, LOW);

for (int i = 0; i < 4; i++) {

pinMode(dtmfPins[i], INPUT);

pinMode(relays[i], OUTPUT);

digitalWrite(relays[i], LOW);

}

pinMode(stqPin, INPUT);

preferences.begin(prefNamespace, false);

loadRelayStates();

updateRelays();

// Opening tulisan center kecil dan rapi

displayCenteredText("WELCOME TO", "PILIHAN ONLINE");

// Nada pembuka Nokia style

playNokiaMelody();

delay(3000); // biar tulisan tetap tampil 3 detik setelah nada

displayStatus(' '); // tampilkan status relay dan IP

// WiFi connect

WiFi.begin(ssid, password);

Serial.print("Menghubungkan ke WiFi");

int retry = 0;

while (WiFi.status() != WL_CONNECTED && retry < 20) {

delay(500);

Serial.print(".");

retry++;

}

if (WiFi.status() == WL_CONNECTED) {

Serial.println();

Serial.print("Terhubung ke WiFi! IP: ");

Serial.println(WiFi.localIP());

} else {

Serial.println();

Serial.println("Gagal terhubung ke WiFi.");

}

displayStatus(' ');

setupWebHandlers();

}

void loop() {

server.handleClient();

if (digitalRead(stqPin) == HIGH) {

int value = 0;

for (int i = 0; i < 4; i++) {

value |= (digitalRead(dtmfPins[i]) << i);

}

if (value != lastDTMF) {

lastDTMF = value;

char key = decodeDTMF(value);

if (key != '?') {

Serial.print("Key: ");

Serial.println(key);

// Nada DTMF tekan tombol

buzz(1000, 100);

switch (key) {

case '1': relayState[0] = true; playRelayTone(0, true); break;

case '2': relayState[1] = true; playRelayTone(1, true); break;

case '3': relayState[2] = true; playRelayTone(2, true); break;

case '4': relayState[3] = true; playRelayTone(3, true); break;

case '5': relayState[0] = relayState[1] = false; playRelayTone(0, false); playRelayTone(1, false); break;

case '6': relayState[2] = relayState[3] = false; playRelayTone(2, false); playRelayTone(3, false); break;

case '7': relayState[0] = !relayState[0]; playRelayTone(0, relayState[0]); break;

case '8': relayState[1] = !relayState[1]; playRelayTone(1, relayState[1]); break;

case '9': relayState[2] = !relayState[2]; playRelayTone(2, relayState[2]); break;

case '0': relayState[3] = !relayState[3]; playRelayTone(3, relayState[3]); break;

}

updateRelays();

saveRelayStates();

displayStatus(key);

}

} else {

lastDTMF = -1; // reset jika tidak ada sinyal

}

Kode fix dengan Auto Reconect

#include <SPI.h>

#include <Adafruit_GFX.h>

#include <Adafruit_SSD1306.h>

#include <WiFi.h>

#include <WebServer.h>

#include <Preferences.h>

// ===== OLED SPI Pins =====

#define OLED_MOSI 23

#define OLED_CLK 18

#define OLED_RESET 5

#define OLED_DC 17

#define OLED_CS 16

#define SCREEN_WIDTH 128

#define SCREEN_HEIGHT 64

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &SPI, OLED_DC, OLED_RESET, OLED_CS);

// ===== DTMF MT8870 input =====

const int dtmfPins[4] = {32, 33, 25, 26}; // Q1..Q4

const int stqPin = 27; // data valid StQ

// ===== Relay pins =====

const int relays[4] = {4, 13, 14, 12};

bool relayState[4] = {false, false, false, false};

// ===== Buzzer =====

const int buzzerPin = 19;

// ===== WiFi Station =====

const char* ssid = "Tes123"; // Ganti dengan WiFi kamu

const char* password = "1234Dcba12"; // Ganti dengan password WiFi

// ===== Web server on port 80 =====

WebServer server(80);

// ===== Preferences (EEPROM emulasi) =====

Preferences preferences;

const char* prefNamespace = "relay_states";

const char* prefKey = "states";

int lastDTMF = -1;

bool isApMode = false;

// ===== Fallback to AP Mode =====

void startAccessPoint() {

const char* apSSID = "PILIHAN-ONLINE";

const char* apPassword = "12345678";

WiFi.softAP(apSSID, apPassword);

isApMode = true;

Serial.println("Fallback ke AP Mode.");

Serial.print("AP IP: ");

Serial.println(WiFi.softAPIP());

displayCenteredText("AP MODE ACTIVE", WiFi.softAPIP().toString().c_str());

}

// ===== WiFi Auto Reconnect =====

void reconnectWiFi() {

if (!isApMode && WiFi.status() != WL_CONNECTED) {

Serial.println("WiFi terputus. Mencoba reconnect...");

WiFi.disconnect();

WiFi.begin(ssid, password);

int retry = 0;

while (WiFi.status() != WL_CONNECTED && retry < 20) {

delay(500);

Serial.print(".");

retry++;

}

if (WiFi.status() == WL_CONNECTED) {

Serial.println("\nBerhasil reconnect!");

displayStatus(' ');

} else {

Serial.println("\nGagal reconnect. Mengaktifkan AP Mode.");

startAccessPoint();

}

// ===== Utilitas DTMF =====

char decodeDTMF(int value) {

switch (value) {

case 0x1: return '1';

case 0x2: return '2';

case 0x3: return '3';

case 0x4: return '4';

case 0x5: return '5';

case 0x6: return '6';

case 0x7: return '7';

case 0x8: return '8';

case 0x9: return '9';

case 0xA: return '0';

case 0xB: return '*';

case 0xC: return '#';

default: return '?';

}

void buzz(int frequency, int duration) {

tone(buzzerPin, frequency, duration);

delay(duration);

noTone(buzzerPin);

}

void playNokiaMelody() {

int melody[] = {

659, 659, 0, 659, 0, 523, 659, 784,

0, 392, 0, 523, 0, 392, 0

};

int noteDurations[] = {

150, 150, 100, 150, 100, 150, 150, 300,

150, 300, 150, 150, 150, 150, 300

};

for (int i = 0; i < sizeof(melody)/sizeof(int); i++) {

if (melody[i] == 0) {

noTone(buzzerPin);

} else {

tone(buzzerPin, melody[i], noteDurations[i]);

}

delay(noteDurations[i] + 20);

}

noTone(buzzerPin);

}

void playRelayTone(int relayIndex, bool isOn) {

int freqOn[4] = {523, 587, 659, 698};

int freqOff[4] = {349, 330, 294, 262};

buzz(isOn ? freqOn[relayIndex] : freqOff[relayIndex], 150);

}

void displayCenteredText(const char* line1, const char* line2) {

display.clearDisplay();

display.setTextColor(SSD1306_WHITE);

display.setTextSize(1);

int16_t x1, y1;

uint16_t w, h;

display.getTextBounds(line1, 0, 0, &x1, &y1, &w, &h);

display.setCursor((SCREEN_WIDTH - w) / 2, 20);

display.println(line1);

display.getTextBounds(line2, 0, 0, &x1, &y1, &w, &h);

display.setCursor((SCREEN_WIDTH - w) / 2, 35);

display.println(line2);

display.display();

}

void displayStatus(char key) {

display.clearDisplay();

display.setCursor(0, 0);

display.setTextSize(1);

display.setTextColor(SSD1306_WHITE);

display.print("Key: ");

display.println(key);

display.println("PILIHAN ONLINE:");

for (int i = 0; i < 4; i++) {

display.print("[");

display.print(i + 1);

display.print("] ");

display.println(relayState[i] ? "ON " : "OFF");

}

display.print("IP: ");

display.println(isApMode ? WiFi.softAPIP() : WiFi.localIP());

display.display();

}

void updateRelays() {

for (int i = 0; i < 4; i++) {

digitalWrite(relays[i], relayState[i] ? HIGH : LOW);

}

void saveRelayStates() {

uint8_t b = 0;

for (int i = 0; i < 4; i++) if (relayState[i]) b |= (1 << i);

preferences.putUInt(prefKey, b);

}

void loadRelayStates() {

uint32_t b = preferences.getUInt(prefKey, 0);

for (int i = 0; i < 4; i++) relayState[i] = (b & (1 << i)) != 0;

}

// ===== Web UI =====

String generateWebPage() {

String page = R"rawliteral(

<!DOCTYPE html><html><head>

<title>ESP32 Relay Control</title>

<style>

body { background:#121212; color:#eee; font-family:sans-serif; text-align:center; padding:20px; }

h2 { color:#00cc66; }

.relay-container { display:flex; flex-wrap:wrap; justify-content:center; gap:15px; margin-top:20px; }

.relay { background:#333; padding:20px 30px; border-radius:8px; min-width:120px; cursor:pointer; transition:0.3s; font-weight:600; font-size:1.1em; box-shadow:0 0 8px #00cc66; }

.relay:hover { background:#00cc66; color:#111; }

.relay.on { background:#00cc66; color:#111; box-shadow:0 0 12px #00cc66; }

a { text-decoration:none; color:inherit; display:block; }

footer { margin-top:30px; color:#666; font-size:0.9em; }

</style></head><body><h2>PILIHAN ONLINE</h2><div class='relay-container'>

)rawliteral";

for (int i = 0; i < 4; i++) {

page += "<div class='relay ";

if (relayState[i]) page += "on";

page += "'><a href='/relay";

page += String(i + 1);

page += relayState[i] ? "_off" : "_on";

page += "'>Relay ";

page += String(i + 1);

page += "<br>";

page += relayState[i] ? "ON" : "OFF";

page += "</a></div>";

}

page += "</div><footer>IP: ";

page += isApMode ? WiFi.softAPIP().toString() : WiFi.localIP().toString();

page += "</footer></body></html>";

return page;

}

void handleRoot() {

server.send(200, "text/html", generateWebPage());

}

void handleRelay(int idx, bool turnOn) {

relayState[idx] = turnOn;

updateRelays();

saveRelayStates();

displayStatus('*');

playRelayTone(idx, turnOn);

server.sendHeader("Location", "/");

server.send(302, "text/plain", "");

}

void setupWebHandlers() {

server.on("/", HTTP_GET, handleRoot);

for (int i = 0; i < 4; i++) {

String onPath = "/relay" + String(i + 1) + "_on";

String offPath = "/relay" + String(i + 1) + "_off";

server.on(onPath.c_str(), HTTP_GET, [i]() { handleRelay(i, true); });

server.on(offPath.c_str(), HTTP_GET, [i]() { handleRelay(i, false); });

}

server.begin();

}

// ===== SETUP & LOOP =====

void setup() {

Serial.begin(115200);

SPI.begin(OLED_CLK, -1, OLED_MOSI, OLED_CS);

if (!display.begin(SSD1306_SWITCHCAPVCC)) while (true);

pinMode(buzzerPin, OUTPUT);

for (int i = 0; i < 4; i++) {

pinMode(dtmfPins[i], INPUT);

pinMode(relays[i], OUTPUT);

digitalWrite(relays[i], LOW);

}

pinMode(stqPin, INPUT);

preferences.begin(prefNamespace, false);

loadRelayStates();

updateRelays();

displayCenteredText("WELCOME TO", "PILIHAN ONLINE");

playNokiaMelody();

delay(3000);

displayStatus(' ');

WiFi.mode(WIFI_STA);

WiFi.begin(ssid, password);

WiFi.setAutoReconnect(true);

WiFi.persistent(true);

int retry = 0;

while (WiFi.status() != WL_CONNECTED && retry < 20) {

delay(500);

retry++;

}

if (WiFi.status() == WL_CONNECTED) {

isApMode = false;

} else {

startAccessPoint();

}

displayStatus(' ');

setupWebHandlers();

}

void loop() {

server.handleClient();

reconnectWiFi();

if (digitalRead(stqPin) == HIGH) {

int value = 0;

for (int i = 0; i < 4; i++) value |= (digitalRead(dtmfPins[i]) << i);

if (value != lastDTMF) {

lastDTMF = value;

char key = decodeDTMF(value);

if (key != '?') {

buzz(1000, 100);

switch (key) {

case '1': relayState[0] = true; break;

case '2': relayState[1] = true; break;

case '3': relayState[2] = true; break;

case '4': relayState[3] = true; break;

case '5': relayState[0] = relayState[1] = false; break;

case '6': relayState[2] = relayState[3] = false; break;

case '7': relayState[0] = !relayState[0]; break;

case '8': relayState[1] = !relayState[1]; break;

case '9': relayState[2] = !relayState[2]; break;

case '0': relayState[3] = !relayState[3]; break;

}

for (int i = 0; i < 4; i++) playRelayTone(i, relayState[i]);

updateRelays();

saveRelayStates();

displayStatus(key);

}

} else {

lastDTMF = -1;

}

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