esp32 code

esp32/app.ino

@@ -0,0 +1,221 @@
+#include <SPI.h>
+#include <WiFi.h>
+#include <HTTPClient.h>
+#include <Ethernet.h>
+
+#include <MFRC522v2.h>
+#include <MFRC522DriverSPI.h>
+#include <MFRC522DriverPinSimple.h>
+
+// =========================
+// USER CONFIG
+// =========================
+const String POST_URL = "https://cije.harryesses.com";
+const char* LOCATION_ID = "office_1";
+byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
+// WiFi fallback
+// const char* WIFI_SSID = "Hillel_Student";
+// const char* WIFI_PASS = "Hillel1025";
+const char* WIFI_SSID = "Esses House Wifi";
+const char* WIFI_PASS = "9175768551";
+// =========================
+// RC522 (Software SPI)
+// =========================
+#define SS_PIN   21
+#define RST_PIN  38   // safer than 15
+
+#define SCK_PIN  18
+#define MISO_PIN 16
+#define MOSI_PIN 17
+
+SPIClass softSPI(HSPI);
+
+MFRC522DriverPinSimple ss_pin(SS_PIN);
+MFRC522DriverSPI driver{ss_pin, softSPI};
+MFRC522 mfrc522(driver);
+
+// =========================
+// Ethernet pins (W5500)
+// =========================
+#define ETH_MOSI 11
+#define ETH_MISO 12
+#define ETH_SCK  13
+#define ETH_CS   14
+
+bool ethernetOK = false;
+bool wifiOK = false;
+String action = "";
+// =========================
+// NETWORK STATUS
+// =========================
+void checkEthernet() {
+    // ETH.begin(ETH_CS, ETH_MOSI, ETH_MISO, ETH_SCK);
+    // delay(2000);
+
+    if (!Ethernet.begin(mac) == 0) {
+        ethernetOK = true;
+        Serial.print("Ethernet IP: ");
+        Serial.println(Ethernet.localIP());
+    } else {
+        ethernetOK = false;
+        Serial.println("Ethernet failed");
+    }
+}
+
+void connectWiFi() {
+    WiFi.mode(WIFI_STA);
+    WiFi.begin(WIFI_SSID, WIFI_PASS);
+
+    Serial.print("Connecting WiFi");
+    unsigned long start = millis();
+
+    while (WiFi.status() != WL_CONNECTED && millis() - start < 10000) {
+        delay(500);
+        Serial.print(".");
+    }
+
+    if (WiFi.status() == WL_CONNECTED) {
+        wifiOK = true;
+        Serial.println();
+        Serial.print("WiFi IP: ");
+        Serial.println(WiFi.localIP());
+    } else {
+        wifiOK = false;
+        Serial.println("\nWiFi failed");
+    }
+}
+
+bool sendHTTP(String uid, String action) {
+
+    if (!ethernetOK && !wifiOK) return false;
+    if (action == "") {
+        action = "other";
+    }
+    HTTPClient http;
+    http.begin(POST_URL+"/scan");
+    http.addHeader("Content-Type", "application/json");
+
+    String payload =
+        "{"
+        "\"uid\":\"" + uid + "\","
+        "\"location_id\":\"" + String(LOCATION_ID) + "\","
+        "\"action\":\"" + action + "\""
+        "}";
+
+    int code = http.POST(payload);
+
+    // Serial.print("HTTP Code: ");
+    // Serial.println(code);
+
+    http.end();
+
+    return code > 0;
+}
+bool checkBathroom() {
+
+    if (!ethernetOK && !wifiOK) return false;
+
+    HTTPClient http;
+    http.begin(POST_URL+"/lights/bathroom/" + String(LOCATION_ID));
+    http.addHeader("Content-Type", "application/json");
+
+
+
+    int code = http.GET();
+
+    // Serial.print("HTTP Code: ");
+    // Serial.println(code);
+
+    http.end();
+
+    return code == 202;
+}
+
+// =========================
+// SETUP
+// =========================
+void setup() {
+
+    Serial.begin(115200);
+    delay(3000);
+
+    Serial.println("\nBooting RFID Scanner...");
+
+    // RC522 SPI
+    softSPI.begin(SCK_PIN, MISO_PIN, MOSI_PIN, SS_PIN);
+
+    pinMode(RST_PIN, OUTPUT);
+    digitalWrite(RST_PIN, HIGH);
+
+    mfrc522.PCD_Init();
+    Serial.println("RC522 ready");
+
+    // NETWORK
+    checkEthernet();
+
+    if (!ethernetOK) {
+        connectWiFi();
+    }
+    pinMode(1, INPUT_PULLUP);
+    pinMode(2, INPUT_PULLUP);
+    pinMode(3, INPUT_PULLUP);
+    pinMode(48, OUTPUT);
+}
+
+// =========================
+// LOOP
+// =========================
+void loop() {
+    //   buttonState = digitalRead(1);/
+  if (checkBathroom()){
+    digitalWrite(48, LOW);
+  }
+  if (digitalRead(1) == LOW) { // Button is pressed
+    action = "bathroom";
+    delay(200); // Simple debounce
+  }
+  if (digitalRead(2) == LOW) { // Button is pressed
+    action = "other";
+    delay(200); // Simple debounce
+  }
+  if (digitalRead(3) == LOW) { // Button is pressed
+    action = "office";
+    delay(200); // Simple debounce
+  }
+    if (!mfrc522.PICC_IsNewCardPresent()) {
+        delay(50);
+        return;
+    }
+
+    if (!mfrc522.PICC_ReadCardSerial()) {
+        delay(50);
+        return;
+    }
+
+    // UID build
+    String uidString = "";
+
+    for (byte i = 0; i < mfrc522.uid.size; i++) {
+        if (mfrc522.uid.uidByte[i] < 0x10) {
+            uidString += "0";
+        }
+        uidString += String(mfrc522.uid.uidByte[i], HEX);
+    }
+
+    uidString.toUpperCase();
+
+    Serial.print("Card UID: ");
+    Serial.println(uidString);
+
+    // send to server
+    bool ok = sendHTTP(uidString, action);
+    action = "";
+    if (ok) {
+        Serial.println("Sent OK");
+    } else {
+        Serial.println("Send FAILED");
+    }
+
+    mfrc522.PICC_HaltA();
+    delay(2000);
+}