87 lines
2.2 KiB
JavaScript
87 lines
2.2 KiB
JavaScript
'use strict';
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const fs = require('fs');
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const log = require('./logger');
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/**
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* WiFi 指示灯控制
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*
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* 硬件路径: /sys/devices/platform/openvfd/attr/b5
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* 1 = 亮 0 = 灭
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*
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* LED 状态与 WiFi 状态的对应关系：
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* - WiFi 已连接且互联网畅通 → 常亮
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* - WiFi 连接中（正在尝试） → 闪烁
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* - WiFi 未连接 / 无互联网 → 熄灭
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*/
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const LED_PATH = process.env.CLAWD_LED_PATH || '/sys/devices/platform/openvfd/attr/b5';
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const BLINK_INTERVAL_MS = 500; // 闪烁间隔（ms）
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class WifiLed {
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constructor() {
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this._blinkTimer = null;
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this._blinkState = false;
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this._current = null; // 'on' | 'off' | 'blink'
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}
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/** 常亮 */
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on() {
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if (this._current === 'on') return;
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this._stopBlink();
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this._write(1);
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this._current = 'on';
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log.debug('led', 'WiFi 指示灯 → 常亮');
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}
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/** 熄灭 */
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off() {
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if (this._current === 'off') return;
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this._stopBlink();
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this._write(0);
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this._current = 'off';
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log.debug('led', 'WiFi 指示灯 → 熄灭');
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}
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/** 闪烁（连接中） */
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blink(intervalMs = BLINK_INTERVAL_MS) {
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if (this._current === 'blink') return;
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this._stopBlink();
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this._blinkState = true;
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this._write(1);
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this._blinkTimer = setInterval(() => {
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this._blinkState = !this._blinkState;
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this._write(this._blinkState ? 1 : 0);
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}, intervalMs);
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this._current = 'blink';
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log.debug('led', 'WiFi 指示灯 → 闪烁');
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}
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/** 释放资源，关灯 */
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destroy() {
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this._stopBlink();
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this._write(0);
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this._current = 'off';
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}
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// ── 内部 ──────────────────────────────────────────────────────────────────
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_stopBlink() {
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if (this._blinkTimer) {
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clearInterval(this._blinkTimer);
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this._blinkTimer = null;
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}
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}
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_write(val) {
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try {
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fs.writeFileSync(LED_PATH, String(val));
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} catch (_) {
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// 设备不支持 openvfd 时静默忽略（开发机上不会报错）
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}
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}
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}
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// 全局单例，整个进程共用
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module.exports = new WifiLed();
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