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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Badge Interactive REPL</title>
<style>
* {
box-sizing: border-box;
}
body {
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
max-width: 900px;
margin: 20px auto;
padding: 20px;
background: #0d1117;
color: #c9d1d9;
}
.container {
background: #161b22;
border-radius: 8px;
padding: 20px;
box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}
h1 {
color: #58a6ff;
margin-top: 0;
font-size: 24px;
}
.controls {
margin-bottom: 15px;
display: flex;
gap: 10px;
flex-wrap: wrap;
}
button {
background: #238636;
color: white;
border: 1px solid #2ea043;
padding: 8px 16px;
border-radius: 6px;
font-size: 14px;
cursor: pointer;
}
button:hover:not(:disabled) {
background: #2ea043;
}
button:disabled {
background: #1f6feb;
border-color: #1f6feb;
cursor: not-allowed;
opacity: 0.6;
}
button.disconnect {
background: #da3633;
border-color: #f85149;
}
button.disconnect:hover:not(:disabled) {
background: #f85149;
}
#terminal {
background: #0d1117;
border: 1px solid #30363d;
border-radius: 6px;
padding: 15px;
font-family: 'Courier New', 'Consolas', monospace;
font-size: 13px;
line-height: 1.6;
white-space: pre-wrap;
word-wrap: break-word;
min-height: 400px;
max-height: 500px;
overflow-y: auto;
margin-bottom: 10px;
}
.input-area {
display: flex;
gap: 10px;
}
#commandInput {
flex: 1;
background: #0d1117;
border: 1px solid #30363d;
border-radius: 6px;
padding: 10px;
color: #c9d1d9;
font-family: 'Courier New', 'Consolas', monospace;
font-size: 14px;
}
#commandInput:focus {
outline: none;
border-color: #58a6ff;
}
#commandInput:disabled {
opacity: 0.5;
cursor: not-allowed;
}
.info {
background: #1f6feb;
border-left: 4px solid #58a6ff;
padding: 12px;
margin: 15px 0;
border-radius: 4px;
font-size: 14px;
}
.terminal-output {
color: #8b949e;
}
.terminal-prompt {
color: #58a6ff;
}
.terminal-error {
color: #f85149;
}
.terminal-success {
color: #3fb950;
}
.terminal-info {
color: #79c0ff;
}
.quick-commands {
display: flex;
gap: 5px;
margin-top: 10px;
flex-wrap: wrap;
}
.quick-commands button {
font-size: 12px;
padding: 5px 10px;
background: #21262d;
border-color: #30363d;
}
.quick-commands button:hover:not(:disabled) {
background: #30363d;
}
</style>
</head>
<body>
<div class="container">
<h1>Badge Interactive REPL</h1>
<div class="info">
<strong>Note:</strong> This tool requires the Web Serial API (Chrome/Edge on desktop).
</div>
<div class="controls">
<button id="connectBtn" onclick="connect()">Connect to Badge</button>
<button class="disconnect" id="disconnectBtn" onclick="disconnect()" disabled>Disconnect</button>
<button id="clearBtn" onclick="clearTerminal()">Clear Terminal</button>
</div>
<div id="terminal"><span class="terminal-info">Ready to connect. Click "Connect to Badge" to start.</span></div>
<div class="input-area">
<input type="text" id="commandInput" placeholder="Enter Python command (e.g., print('Hello'), import os)" disabled autocomplete="off">
<button id="sendBtn" onclick="executeCommand()" disabled>Send</button>
</div>
<div class="quick-commands">
<button onclick="quickCommand('os.listdir()')" disabled id="qc1">List Files</button>
<button onclick="quickCommand('machine.freq()')" disabled id="qc2">CPU Freq</button>
<button onclick="quickCommand('gc.mem_free()')" disabled id="qc3">Free Memory</button>
<button onclick="quickCommand('help()')" disabled id="qc4">Help</button>
</div>
</div>
<script>
let port = null;
let reader = null;
let writer = null;
let readableStreamClosed = null;
let writableStreamClosed = null;
let readLoopRunning = false;
let isConnected = false;
let lastCommand = '';
let connectionPhase = false;
let errorBuffer = '';
const terminal = document.getElementById('terminal');
const commandInput = document.getElementById('commandInput');
function appendToTerminal(text, className = '') {
const span = document.createElement('span');
if (className) {
span.className = className;
}
span.textContent = text;
terminal.appendChild(span);
terminal.scrollTop = terminal.scrollHeight;
}
function clearTerminal() {
terminal.innerHTML = '';
}
// Handle Enter key in input
commandInput.addEventListener('keypress', (e) => {
if (e.key === 'Enter') {
executeCommand();
}
});
async function connect() {
if (!('serial' in navigator)) {
alert('Web Serial API not supported in this browser. Please use Chrome or Edge.');
return;
}
try {
// Reset state
lastCommand = '';
errorBuffer = '';
port = await navigator.serial.requestPort();
await port.open({ baudRate: 115200 });
// Set up streams
const textEncoder = new TextEncoderStream();
writableStreamClosed = textEncoder.readable.pipeTo(port.writable);
writer = textEncoder.writable.getWriter();
const textDecoder = new TextDecoderStream();
readableStreamClosed = port.readable.pipeTo(textDecoder.writable);
reader = textDecoder.readable.getReader();
// Start reading loop
readLoopRunning = true;
readLoop();
// Mark as connection phase (filter boot errors)
connectionPhase = true;
setTimeout(() => { connectionPhase = false; }, 2000);
// Send Ctrl-C to interrupt any running program
await writer.write('\x03');
await sleep(100);
await writer.write('\x03');
await sleep(100);
// Enter friendly REPL mode
await writer.write('\x02');
await sleep(300);
isConnected = true;
updateUI(true);
} catch (error) {
console.error('Connect error:', error);
}
}
async function readLoop() {
try {
while (readLoopRunning && reader) {
const { value, done } = await reader.read();
if (done) {
break;
}
if (value) {
// Add to buffer for error detection
errorBuffer += value;
// Keep buffer manageable (last 1000 chars)
if (errorBuffer.length > 1000) {
errorBuffer = errorBuffer.slice(-1000);
}
// Check if we should filter this error
const shouldFilter =
(connectionPhase || lastCommand.trim().startsWith('import ')) &&
errorBuffer.includes("TypeError: can't convert 'NoneType' object to str implicitly");
if (shouldFilter) {
// Filter out the error - don't display this chunk
// Clear the lastCommand so we don't keep filtering
lastCommand = '';
// Clear error buffer
errorBuffer = '';
} else {
// Display normally
appendToTerminal(value);
}
}
}
} catch (error) {
if (readLoopRunning) {
console.error('Read error:', error);
}
}
}
async function executeCommand() {
const command = commandInput.value.trim();
if (!command || !isConnected || !writer) return;
try {
// Track the last command for error filtering
lastCommand = command;
// Send the command (REPL will echo it back)
await writer.write(command + '\r\n');
// Clear input
commandInput.value = '';
} catch (error) {
appendToTerminal(`ERROR: ${error.message}\n`, 'terminal-error');
console.error('Send error:', error);
}
}
async function quickCommand(cmd) {
commandInput.value = cmd;
await executeCommand();
}
async function disconnect() {
try {
readLoopRunning = false;
if (writer) {
try {
await writer.close();
} catch (e) {
console.error('Writer close error:', e);
}
}
if (reader) {
try {
await reader.cancel();
} catch (e) {
console.error('Reader cancel error:', e);
}
}
try {
await writableStreamClosed;
} catch (e) {
console.error('Writable stream error:', e);
}
try {
await readableStreamClosed;
} catch (e) {
console.error('Readable stream error:', e);
}
if (port) {
await port.close();
}
port = null;
reader = null;
writer = null;
readableStreamClosed = null;
writableStreamClosed = null;
isConnected = false;
lastCommand = '';
connectionPhase = false;
errorBuffer = '';
updateUI(false);
} catch (error) {
appendToTerminal(`DISCONNECT ERROR: ${error.message}\n`, 'terminal-error');
console.error('Error:', error);
}
}
function updateUI(connected) {
document.getElementById('connectBtn').disabled = connected;
document.getElementById('disconnectBtn').disabled = !connected;
document.getElementById('commandInput').disabled = !connected;
document.getElementById('sendBtn').disabled = !connected;
// Enable/disable quick command buttons
const quickBtns = ['qc1', 'qc2', 'qc3', 'qc4'];
quickBtns.forEach(id => {
document.getElementById(id).disabled = !connected;
});
if (connected) {
commandInput.focus();
}
}
function sleep(ms) {
return new Promise(resolve => setTimeout(resolve, ms));
}
// Clean up on page unload
window.addEventListener('beforeunload', async () => {
if (port) {
readLoopRunning = false;
try {
if (writer) await writer.close();
if (reader) await reader.cancel();
if (port) await port.close();
} catch (e) {
console.error('Cleanup error:', e);
}
}
});
</script>
</body>
</html>