const { SerialPort } = require('serialport');
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const PORT_NAME = 'COM9'; // 确认端口
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// 尝试不同的目标节点和类型
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const PROBES = [
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{ dst: 0x53, type: 0x0F, desc: "Service Node: Get System Info" }, // 'S'
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{ dst: 0x4D, type: 0x0F, desc: "Maint Node: Get System Info" }, // 'M'
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{ dst: 0x53, type: 0x00, cond: 0x09, desc: "Service Node: Get Version (Cond=09)" },
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{ dst: 0x4F, type: 0x0E, desc: "Operator Node: Service Request" } // 特殊类型
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];
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function buildProbe(dst, type, cond = 0x00) {
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// 简化构建：Seq=01, Src=00, Param=0000, NumSpec=00 (无参数)
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// 注意：如果没有 Spec，长度会变短
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// 结构: Seq, Len, Src, Dst, Type, Cond, ParamH, ParamL, NumSpec
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// 如果 NumSpec=0，后面就没有 SpecType/Idx
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const numSpec = 0x00;
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// Len = Src(1)+Dst(1)+Type(1)+Cond(1)+Param(2)+NumSpec(1) + CRC(1) = 8 (0x08)
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const len = 0x08;
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const raw = [0x01, len, 0x00, dst, type, cond, 0x00, 0x00, numSpec];
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let sum = raw.reduce((a, b) => a + b, 0);
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const crc = sum & 0xFF;
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raw.push(crc);
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// 转义
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const special = new Set([0x02, 0x04, 0x06, 0x15, 0x1B]);
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const escaped = [];
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raw.forEach(b => {
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if(special.has(b)) { escaped.push(0x1B); escaped.push((b+0x20)&0xFF); }
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else escaped.push(b);
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});
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return Buffer.from([0x02, ...escaped, 0x04]);
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}
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async function runProbes() {
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const port = new SerialPort({ path: PORT_NAME, baudRate: 9600 });
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port.on('open', async () => {
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console.log("🔍 开始探测维护模式...");
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for (const p of PROBES) {
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const pkt = buildProbe(p.dst, p.type, p.cond);
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console.log(`\n尝试: ${p.desc}`);
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console.log(`Hex: ${pkt.toString('hex').match(/.{1,2}/g).join(' ')}`);
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port.write(pkt);
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const resp = await new Promise(res => {
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let t = setTimeout(() => res(null), 1000);
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port.once('data', d => { clearTimeout(t); res(d); });
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});
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if (resp) {
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if (resp[0] === 0x06) console.log("✅ SUCCESS! 发现隐藏入口!");
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else if (resp[0] === 0x15) console.log("❌ NAK");
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else console.log(`⚠️ 未知: ${resp.toString('hex')}`);
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} else {
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console.log("⏱️ 超时");
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}
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await new Promise(r => setTimeout(r, 300));
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}
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port.close();
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});
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}
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runProbes();
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