feat: add SLIX2 password support

Implement ICODE-SLIX2 password authentication in the PN5180 reader
(disable privacy mode) with a configurable 8-digit hex password,
stored in NVS and editable from the RFID settings in the web
interface.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: fhirschmann

html/locales/de.json

@@ -396,6 +396,10 @@
 			"description": "Wähle den Typ des RFID readers. Auto-detect wird versuchen den Reader automatisch zu erkennen.",
 			"pn5180Lpcd": "PN5180 LPCD aktivieren",
 			"pn5180LpcdExp": "Aktiviert Low Power Card Detection für PN5180 RFID Reader. Nur möglich, wenn Lötbrücken richtig gesetzt sind.",
+			"slix2Password": {
+				"title": "SLIX2 Passwort",
+				"description": "8-stelliges Passwort in Hexadezimal-Format (z.B. 01020304) zum Auslesen von SLIX2-Tags."
+			},
 			"mfrc522Gain": "MFRC522 Gain",
 			"mfrc522GainExp": "Stellt die Empfindlichkeit des MFRC522 RFID Readers ein. Mögliche Werte sind 0 (niedrigste Empfindlichkeit) bis 7 (höchste Empfindlichkeit). Standard ist 7."
 		},

html/locales/en.json

@@ -396,8 +396,13 @@
 			},
 			"description": "Select the type of RFID reader connected to your ESPuino. Auto-detect will try to determine the connected reader type automatically.",
 			"pn5180Lpcd": "Enable PN5180 LPCD",
-			"pn5180LpcdExp": "Enable Low Power Card Detection for PN5180 RFID reader. Only possible if solder-pins are set correctly.",
+			"pn5180LpcdExp": "Enables Low Power Card Detection for PN5180 RFID reader. Only possible if solder jumpers are set correctly.",
+			"slix2Password": {
+				"title": "SLIX2 Password",
+				"description": "8-digit password in hexadecimal format (e.g. 01020304) for reading SLIX2 tags."
+			},
 			"mfrc522Gain": "MFRC522 Gain",
+
 			"mfrc522GainExp": "Sets the sensitivity of the MFRC522 RFID reader. Possible values are 0 (lowest sensitivity) to 7 (highest sensitivity). Default is 7."
 		},
 		"options": {

html/management.html

@@ -974,6 +974,18 @@ <h5 class="modal-title" data-i18n="tools.nvs.erase.title"></h5>
 								<a href="#" class="link-secondary" data-bs-toggle="popover"
 									data-i18n="[data-bs-content]general.rfid.pn5180LpcdExp" tabindex="0"><i
 										class="fas fa-circle-question"></i></a>
+							</div><br>
+							<div class="mb-3">
+								<label for="slix2Password" data-i18n="general.rfid.slix2Password.title"></label>
+								<div class="input-group">
+									<input type="text" class="form-control" id="slix2Password" name="slix2Password"
+										maxlength="8" placeholder="e.g. 01020304">
+									<span class="input-group-text bg-transparent border-0">
+										<a href="#" class="link-secondary" data-bs-toggle="popover"
+											data-i18n="[data-bs-content]general.rfid.slix2Password.description" tabindex="0">
+											<i class="fas fa-circle-question"></i></a>
+									</span>
+								</div>
 							</div>
 						</fieldset>
 					</div>
@@ -2537,9 +2549,18 @@ <h5 class="modal-title" data-i18n="tools.nvs.erase.title"></h5>
 				$('#pauseOnMinVolume').prop('checked', genSettings.pauseOnMinVol);
 				$('#recoverVolBoot').prop('checked', genSettings.recoverVolBoot);
 				$('#volumeCurve').prop('checked', genSettings.volumeCurve > 0);
-				$('#rfidReaderType').val(genSettings.rfidReaderType);
-				$('#pn5180Lpcd').prop('checked', genSettings.pn5180Lpcd);
-				$('#mfrc522Gain').val(genSettings.mfrc522Gain);
+				if (genSettings.rfidReaderType !== undefined) {
+					$('#rfidReaderType').val(genSettings.rfidReaderType);
+				}
+				if (genSettings.pn5180Lpcd !== undefined) {
+					$('#pn5180Lpcd').prop('checked', genSettings.pn5180Lpcd);
+				}
+				if (genSettings.slix2Password !== undefined) {
+					$('#slix2Password').val(genSettings.slix2Password);
+				}
+				if (genSettings.mfrc522Gain !== undefined) {
+					document.getElementById('mfrc522Gain').value = genSettings.mfrc522Gain;
+				}
 			}
 			// current values
 			let currSettings = settings.current;
@@ -2954,6 +2975,7 @@ <h5 class="modal-title" data-i18n="tools.nvs.erase.title"></h5>
 					volumeCurve: $("#volumeCurve").prop('checked') ? 1 : 0,
 					rfidReaderType: Number($('#rfidReaderType').val()),
 					pn5180Lpcd: $('#pn5180Lpcd').prop('checked'),
+					slix2Password: $('#slix2Password').val(),
 					mfrc522Gain: Number($('#mfrc522Gain').val())
 				},
 				"led": {

src/RfidPn5180.cpp

@@ -100,7 +100,7 @@ void RfidPn5180_Init(void) {
 		xTaskCreatePinnedToCore(
 			RfidPn5180_Task, /* Function to implement the task */
 			"rfid", /* Name of the task */
-			3072, /* Stack size in words */
+			4096, /* Stack size in words */
 			NULL, /* Task input parameter */
 			2 | portPRIVILEGE_BIT, /* Priority of the task */
 			&rfidTaskHandle, /* Task handle. */
@@ -129,6 +129,19 @@ void RfidPn5180_Task(void *parameter) {
 	uint8_t uid[10];
 	bool showDisablePrivacyNotification = true;
 
+	// SLIX2 Password caching
+	uint8_t password[8] = {0x0F, 0x0F, 0x0F, 0x0F, 0x00, 0x00, 0x00, 0x00};
+	uint8_t passwordLength = 4;
+
+	String savedPwd = gPrefsRfid.getString("slix2Pwd", "");
+	if (savedPwd.length() >= 8) {
+		passwordLength = (savedPwd.length() >= 16) ? 8 : 4;
+		for (uint8_t i = 0; i < passwordLength; i++) {
+			char hex[3] = {savedPwd[i * 2], savedPwd[i * 2 + 1], '\0'};
+			password[i] = (uint8_t) strtol(hex, NULL, 16);
+		}
+	}
+
 	// wait until queues are created
 	while (gRfidCardQueue == NULL) {
 		Log_Println(waitingForTaskQueues, LOGLEVEL_DEBUG);
@@ -193,12 +206,6 @@ void RfidPn5180_Task(void *parameter) {
 			nfc15693.setupRF();
 		} else if (RFID_PN5180_NFC15693_STATE_DISABLEPRIVACYMODE == stateMachine) {
 			// check for ICODE-SLIX2 password protected tag
-			// put your privacy password here, e.g.:
-			// https://de.ifixit.com/Antworten/Ansehen/513422/nfc+Chips+f%C3%BCr+tonies+kaufen
-			//
-			// default factory password for ICODE-SLIX2 is {0x0F, 0x0F, 0x0F, 0x0F}
-			//
-			const uint8_t password[] = {0x0F, 0x0F, 0x0F, 0x0F};
 			ISO15693ErrorCode myrc = nfc15693.disablePrivacyMode(password);
 			if (ISO15693_EC_OK == myrc) {
 				if (showDisablePrivacyNotification) {

src/Web.cpp

@@ -690,6 +690,13 @@ WebsocketCodeType JSONToSettings(JsonObject doc) {
 		success = success && (gPrefsSettings.putUChar("volumeCurve", generalObj["volumeCurve"].as<uint8_t>()) != 0);
 		success = success && (gPrefsRfid.putUChar("rfidReaderType", generalObj["rfidReaderType"].as<uint8_t>()) != 0);
 		success = success && (gPrefsRfid.putBool("pn5180Lpcd", generalObj["pn5180Lpcd"].as<bool>()) != 0);
+		if (generalObj["slix2Password"].is<const char *>()) {
+			const char *pwd = generalObj["slix2Password"].as<const char *>();
+			size_t written = gPrefsRfid.putString("slix2Pwd", pwd);
+			if (strlen(pwd) > 0 && written == 0) {
+				success = false;
+			}
+		}
 		success = success && (gPrefsRfid.putUChar("mfrc522Gain", generalObj["mfrc522Gain"].as<uint8_t>()) != 0);
 		if (!success) {
 			Log_Printf(LOGLEVEL_ERROR, webSaveSettingsError, "general");
@@ -1038,6 +1045,7 @@ static void settingsToJSON(JsonObject obj, const String section) {
 		generalObj["dontAcceptRfidTwice"].set(gPrefsSettings.getBool("dAccRfidTwice", false)); // DONT_ACCEPT_SAME_RFID_TWICE
 		generalObj["rfidReaderType"].set(gPrefsRfid.getUChar("rfidReaderType", 0)); // RFID_READER_TYPE_RUNTIME
 		generalObj["pn5180Lpcd"].set(gPrefsRfid.getBool("pn5180Lpcd", false)); // PN5180 LPCD
+		generalObj["slix2Password"].set(gPrefsRfid.getString("slix2Pwd", "")); // SLIX2 Password
 		generalObj["mfrc522Gain"].set(gPrefsRfid.getUChar("mfrc522Gain", 7)); // MFRC522_GAIN
 		generalObj["pauseOnMinVol"].set(gPrefsSettings.getBool("pauseOnMinVol", false)); // PAUSE_ON_MIN_VOLUME
 		generalObj["recoverVolBoot"].set(gPrefsSettings.getBool("recoverVolBoot", false)); // USE_LAST_VOLUME_AFTER_REBOOT

src/settings-override.h.sample

@@ -210,7 +210,10 @@
 		#define CHIPSET					WS2812B     	// type of Neopixel
 		#define COLOR_ORDER				GRB
 		#define NUM_LEDS_IDLE_DOTS		4           	// count of LEDs, which are shown when Idle
+		#define IDLE_COLOR			CRGB::White	// color of the idle dots
 		#define OFFSET_PAUSE_LEDS		false		// if true the pause-leds are centered in the mid of the LED-Strip
+		#define PROGRESS_COLOR_START		0x00FF00	// start color of the progress bar
+		#define PROGRESS_COLOR_END		0xFF0000	// end color of the progress bar
 		#define PROGRESS_HUE_START		85          	// Start and end hue of mulitple-LED progress indicator. Hue ranges from basically 0 - 255, but you can also set numbers outside this range to get the desired effect (e.g. 85-215 will go from green to purple via blue, 341-215 start and end at exactly the same color but go from green to purple via yellow and red)
 		#define PROGRESS_HUE_END		-1
 		#define DIMMABLE_STATES			50		// Number of dimmed values between two full LEDs (https://forum.espuino.de/t/led-verbesserungen-rework/1739)