move UART bridge -> tutorials

2026-10-21 11:30:01 +00:00 · 2025-02-26 15:08:06 -03:00
commit aeda7e5520
@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <title>Device Dashboard</title>
+    <meta charset="utf-8" />
+    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <link rel="stylesheet" href="style.css" />
+  </head>
+  <body></body>
+  <script type="module" src="main.js"></script>
+</html>
@@ -0,0 +1,153 @@
+'use strict';
+import {Component, h, html, render, useEffect, useState, useRef} from './preact.min.js';
+
+const Message = m => html`<span
+  style="color: ${m.message.uart ? '#444' : '#373'};">
+  ${m.message.data}
+</span>`;
+
+const App = function(props) {
+  const [cfg, setCfg] = useState({tcp: {}, ws: {}, mqtt: {}});
+  const [messages, setMessages] = useState([]);
+  const [connected, setConnected] = useState(false);
+  const [txt, setTxt] = useState('');
+  const [ws, setWs] = useState(null);
+
+  const refresh = () =>
+      fetch('/api/config/get').then(r => r.json()).then(r => setCfg(r));
+
+  const getport = (url, v) => ((url || '').match(/.*:(\d+)/) || ['', v])[1];
+
+  const watchWebsocket = function() {
+    // Connect to websocker port, to implement WS console
+    var reconnect = function() {
+      var port = getport(cfg.ws.url, 4002);
+      var l = window.location, proto = l.protocol.replace('http', 'ws');
+      var tid, url = `${proto}//${l.hostname}:${port}/ws`;
+      // console.log(url);
+      var ws = new WebSocket(url);
+      ws.onopen = () => {
+        setConnected(true);
+        setWs(ws);
+      };
+      ws.onmessage = ev => {
+        // console.log(ev, ev.data);
+        setMessages(x => x.concat([{data: ev.data, uart: true}]));
+      };
+      ws.onclose = function() {
+        clearTimeout(tid);
+        tid = setTimeout(reconnect, 1000);
+        setConnected(false);
+        setWs(null);
+      };
+    };
+    reconnect();
+  };
+
+  useEffect(() => {
+    refresh();
+    watchWebsocket();
+  }, []);
+
+
+  const sendmessage = ev => {
+    setMessages(x => x.concat([{data: txt + '\n', uart: false}]));
+    if (ws) ws.send(txt + '\n');
+    setTxt('');
+  };
+
+  const onchange = ev => fetch('/api/config/set', {
+                           method: 'POST',
+                           headers: {'Content-Type': 'application/json'},
+                           body: JSON.stringify(cfg),
+                         }).then(r => ws && ws.close());
+
+  const set = obj => setCfg(x => Object.assign(x, obj));
+  const nset = (n,obj) => setCfg(x => Object.assign(x, {[n]: Object.assign(x[n],obj)}));
+  const setTx = ev => set({tx: parseInt(ev.target.value)});
+  const setRx = ev => set({rx: parseInt(ev.target.value)});
+  const setBaud = ev => set({baud: parseInt(ev.target.value)});
+  const setTcpUrl = ev => nset('tcp', {url: `tcp://0.0.0.0:${ev.target.value}`});
+  const setWsUrl = ev => nset('ws',{url: `ws://0.0.0.0:${ev.target.value}`});
+  const setMqttUrl = ev => nset('mqtt',{url: ev.target.value});
+  const setTcpEna = ev => (nset('tcp',{enable: ev.target.checked}), onchange());
+  const setWsEna = ev => (nset('ws',{enable: ev.target.checked}), onchange());
+  const setMqttEna = ev =>(nset('mqtt', {enable: ev.target.checked}), onchange());
+
+  return html`
+<div class="container">
+  <h1 style="margin-bottom: 0;">UART \u27F7 network bridge </h1>
+  <pre class="d-none">${JSON.stringify(cfg, null, 2)}</pre>
+  <div class="row">
+    <div class="col col-4">
+      <h3>UART configuration</h3>
+      <div class="d-flex pr-1 my-1">
+        <label class="addon">UART TX pin</label>
+        <input style="width: 5em;" value=${cfg.tx} onchange=${onchange}
+          oninput=${setTx} />
+      </div><div class="d-flex pr-1 my-1">
+        <label class="addon">UART RX pin</label>
+        <input style="width: 5em;" value=${cfg.rx} onchange=${onchange}
+          oninput=${setRx} />
+      </div><div class="d-flex pr-1 my-y">
+        <label class="addon">UART Baud</label>
+        <input style="width: 5em;" value=${cfg.baud} onchange=${onchange}
+          oninput=${setBaud} />
+      </div>
+    </div>
+    <div class="col col-8">
+      <h3>Network configuration</h3>
+      <div class="d-flex my-1">
+        <label class="addon">Local TCP port</label>
+        <input style="min-width: 4em; flex: 1 100%;"
+          value=${getport(cfg.tcp.url, 4001)} onchange=${onchange}
+          oninput=${setTcpUrl} />
+        <label class="ml-1 d-flex label"><input type="checkbox"
+          checked=${cfg.tcp.enable} onchange=${setTcpEna} /> enable</label>
+      </div><div class="d-flex my-1">
+        <label class="addon">Local WS port</label>
+        <input style="flex: 1 100%;"
+          value=${getport(cfg.ws.url, 4002)} onchange=${onchange}
+          oninput=${setWsUrl} />
+        <label class="ml-1 d-flex label"><input type="checkbox"
+          checked=${cfg.ws.enable} onchange=${setWsEna} /> enable</label>
+      </div><div class="d-flex my-1">
+        <label class="addon">Remote MQTT</label>
+        <input style="flex: 1 100%;"
+          value=${cfg.mqtt.url} onchange=${onchange}
+          oninput=${setMqttUrl} />
+        <label class="ml-1 d-flex label"><input type="checkbox"
+          checked=${cfg.mqtt.enable} onchange=${setMqttEna} /> enable</label>
+      </div>
+    </div>
+  </div>
+
+  <div class="msg">
+    Note: to connect over MQTT, 
+      open <a href="http://www.hivemq.com/demos/websocket-client/">
+        console</a>, subscribe to b/tx and publish to b/rx<br/>
+    Note: to connect over TCP, use netcat utility:<br/>
+    $ nc ${location.hostname} ${getport(cfg.tcp.url, 4001)}
+  </div>
+
+  <div style="margin-top: 2em;">
+    <b>UART console</b><span style="margin-left: 1em; color: #777;">works 
+    over the local WS port. WebSocket status: </span><span
+      style="color: ${connected ? 'teal' : 'red'};">
+      \u25cf ${connected ? 'connected' : 'disconnected'} </span>
+  </div>
+  <div style="margin: 0.5em 0; display: flex">
+    <input placeholder="to send data, type and press enter..." style="flex: 1 100%;"
+      value=${txt} onchange=${sendmessage}
+      oninput=${ev => setTxt(ev.target.value)} />
+    <button style="margin-left: 1em;"
+      onclick=${ev => setMessages([])}>clear</button>
+  </div>
+  <pre style="height: 15em; overflow: auto;">
+    ${messages.map(message => h(Message, {message}))}
+  </pre>
+
+</div>`;
+};
+
+window.onload = () => render(h(App), document.body);
@@ -0,0 +1 @@
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