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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>🛰️ Space IoT Transmission | Stop-and-Wait Protocol in Orbit</title>
<script src="https://cdn.tailwindcss.com"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
<style>
@keyframes float {
0% { transform: translateY(0px); }
50% { transform: translateY(-10px); }
100% { transform: translateY(0px); }
}
@keyframes pulse {
0% { opacity: 0.6; }
50% { opacity: 1; }
100% { opacity: 0.6; }
}
@keyframes satelliteOrbit {
0% { transform: rotate(0deg) translateX(150px) rotate(0deg); }
100% { transform: rotate(360deg) translateX(150px) rotate(-360deg); }
}
.floating {
animation: float 4s ease-in-out infinite;
}
.pulse {
animation: pulse 2s ease-in-out infinite;
}
.satellite {
animation: satelliteOrbit 20s linear infinite;
}
.space-bg {
background: linear-gradient(to bottom, #0f0c29, #302b63, #24243e);
}
.transmission-box {
border: 1px solid rgba(255,255,255,0.1);
background: rgba(0,0,0,0.3);
backdrop-filter: blur(10px);
transition: all 0.3s ease;
}
.transmission-box:hover {
transform: scale(1.02);
box-shadow: 0 0 20px rgba(100, 149, 237, 0.5);
}
.signal-strength {
width: 100%;
height: 6px;
background: linear-gradient(to right, #ff0000, #ffff00, #00ff00);
position: relative;
}
.signal-indicator {
position: absolute;
width: 2px;
height: 10px;
background: white;
top: -2px;
}
.typing {
width: 5px;
height: 5px;
border-radius: 50%;
display: inline-block;
margin-right: 3px;
animation: typing 1s infinite ease-in-out;
background: #4fd1c5;
}
.typing:nth-child(1) {
animation-delay: 0s;
}
.typing:nth-child(2) {
animation-delay: 0.2s;
}
.typing:nth-child(3) {
animation-delay: 0.4s;
}
@keyframes typing {
0% { transform: translateY(0); opacity: 0.4; }
50% { transform: translateY(-5px); opacity: 1; }
100% { transform: translateY(0); opacity: 0.4; }
}
</style>
</head>
<body class="space-bg min-h-screen font-sans text-white">
<div class="container mx-auto px-4 py-8">
<!-- Animated Background Elements -->
<div class="fixed top-0 left-0 w-full h-full overflow-hidden z-0">
<div class="absolute top-20 left-1/4 w-2 h-2 bg-white rounded-full opacity-30"></div>
<div class="absolute top-1/3 left-3/4 w-3 h-3 bg-blue-300 rounded-full opacity-40"></div>
<div class="absolute top-2/3 left-1/5 w-1 h-1 bg-white rounded-full opacity-50"></div>
<div class="absolute top-1/4 left-1/2 w-4 h-4 bg-yellow-200 rounded-full opacity-20"></div>
<div class="absolute top-3/4 left-1/3 w-2 h-2 bg-white rounded-full opacity-30"></div>
</div>
<!-- Header -->
<header class="text-center mb-12 relative z-10">
<div class="inline-block relative">
<div class="satellite absolute -top-8 -left-8">
<i class="fas fa-satellite text-blue-300 text-3xl"></i>
</div>
<h1 class="text-5xl font-bold mb-4 bg-clip-text text-transparent bg-gradient-to-r from-blue-300 to-purple-300 inline-block">SPACE IoT TRANSMISSION</h1>
</div>
<p class="text-xl opacity-80 mb-6">Stop-and-Wait Protocol in Satellite Communications 🛰️</p>
<div class="mt-6">
<span class="inline-block bg-blue-500 bg-opacity-30 text-blue-300 px-4 py-2 rounded-full text-sm font-semibold mr-2 mb-2 border border-blue-400 border-opacity-50">#SpaceComms</span>
<span class="inline-block bg-purple-500 bg-opacity-30 text-purple-300 px-4 py-2 rounded-full text-sm font-semibold mr-2 mb-2 border border-purple-400 border-opacity-50">#ReliableInSpace</span>
<span class="inline-block bg-teal-500 bg-opacity-30 text-teal-300 px-4 py-2 rounded-full text-sm font-semibold mr-2 mb-2 border border-teal-400 border-opacity-50">#IoTFromOrbit</span>
</div>
</header>
<!-- Main Content -->
<div class="flex flex-col lg:flex-row gap-8 relative z-10">
<!-- Theory Section -->
<div class="lg:w-1/2 transmission-box rounded-xl p-6">
<h2 class="text-3xl font-bold text-blue-300 mb-6 flex items-center">
<i class="fas fa-rocket mr-3"></i> Space IoT Transmission Theory
</h2>
<div class="space-y-6">
<div class="transmission-box p-4 rounded-lg">
<h3 class="text-xl font-semibold text-blue-200 mb-2">Why Stop-and-Wait in Space? 🌌</h3>
<p class="opacity-90">
In space communications with IoT devices, distances are vast (like 36,000 km for geostationary satellites!)
and signals are weak. Stop-and-Wait provides reliability when every bit counts and latency is already high.
</p>
</div>
<div class="transmission-box p-4 rounded-lg">
<h3 class="text-xl font-semibold text-purple-200 mb-2">Space Transmission Challenges 🚀</h3>
<ul class="list-disc pl-5 space-y-2 opacity-90">
<li><span class="font-semibold">High Latency:</span> 250-500ms round-trip times make pipelining inefficient</li>
<li><span class="font-semibold">Signal Loss:</span> Atmospheric interference, solar flares, and cosmic noise</li>
<li><span class="font-semibold">Power Constraints:</span> IoT devices have limited energy for retransmissions</li>
<li><span class="font-semibold">Orbital Mechanics:</span> Satellites move, causing Doppler shifts and connection drops</li>
</ul>
</div>
<div class="grid grid-cols-1 md:grid-cols-2 gap-4">
<div class="transmission-box p-4 rounded-lg">
<h3 class="text-xl font-semibold text-green-300 mb-2">Space IoT Use Cases 🛰️</h3>
<ul class="list-disc pl-5 text-sm opacity-90">
<li>Environmental monitoring sensors</li>
<li>Precision agriculture telemetry</li>
<li>Maritime tracking beacons</li>
<li>Remote infrastructure monitoring</li>
<li>Disaster early warning systems</li>
</ul>
</div>
<div class="transmission-box p-4 rounded-lg">
<h3 class="text-xl font-semibold text-yellow-300 mb-2">Protocol Enhancements ⚡</h3>
<ul class="list-disc pl-5 text-sm opacity-90">
<li>Adaptive timeout values based on orbit position</li>
<li>Forward error correction for error recovery</li>
<li>Compressed headers to save bandwidth</li>
<li>Differential encoding to handle Doppler shifts</li>
</ul>
</div>
</div>
<div class="transmission-box p-4 rounded-lg">
<h3 class="text-xl font-semibold text-pink-200 mb-2">Real Space Missions Using This 🛸</h3>
<div class="flex items-start mt-4">
<div class="mr-4 text-4xl opacity-70">
<i class="fas fa-satellite-dish"></i>
</div>
<div class="opacity-90">
<p>NASA's CubeSat missions, ESA's IoT demonstrators, and commercial satellite IoT networks
like Swarm Technologies and Lacuna Space use variants of Stop-and-Wait for reliable
communication with power-constrained devices.</p>
</div>
</div>
</div>
</div>
</div>
<!-- Simulation Section -->
<div class="lg:w-1/2">
<div class="transmission-box rounded-xl p-6 mb-6">
<h2 class="text-3xl font-bold text-green-300 mb-6 flex items-center">
<i class="fas fa-satellite-dish mr-3"></i> Space IoT Transmission Simulator
</h2>
<div class="relative mb-8">
<div class="flex justify-between items-center mb-2">
<div class="text-center">
<div class="w-16 h-16 bg-blue-500 rounded-full flex items-center justify-center mx-auto mb-2 floating">
<i class="fas fa-sensor text-white text-2xl"></i>
</div>
<p class="font-semibold">IoT Device</p>
<p class="text-xs opacity-70">(Ground Station)</p>
</div>
<div class="text-center">
<div class="w-20 h-20 bg-purple-500 rounded-full flex items-center justify-center mx-auto mb-2 floating" style="animation-delay: 0.5s">
<i class="fas fa-satellite text-white text-3xl"></i>
</div>
<p class="font-semibold">Satellite</p>
<p class="text-xs opacity-70">(Geostationary Orbit)</p>
</div>
</div>
<div class="absolute top-1/2 left-0 right-0 h-1 bg-gray-700 z-0"></div>
<div class="relative z-10">
<div class="signal-strength my-4">
<div class="signal-indicator" style="left: 20%"></div>
<div class="signal-indicator" style="left: 45%"></div>
<div class="signal-indicator" style="left: 70%"></div>
</div>
<div class="flex justify-between text-xs opacity-80">
<span>Signal Quality</span>
<span id="signal-quality">Good (SNR: 12dB)</span>
</div>
</div>
</div>
<div class="space-y-4 h-64 overflow-y-auto pr-2" id="simulation-area">
<!-- Initial message -->
<div class="transmission-box p-4 rounded-lg">
<div class="flex justify-between items-center mb-1">
<div class="text-blue-300 font-semibold">Ground Control</div>
<div class="text-xs opacity-70">System Ready</div>
</div>
<div class="text-sm opacity-90">
Space IoT transmission simulator initialized. Waiting for commands...
</div>
</div>
</div>
<div class="mt-6">
<div class="flex justify-between items-center mb-3">
<div>
<span class="text-sm opacity-80">Transmission Delay:</span>
<select id="delay-select" class="ml-2 bg-gray-800 border border-gray-700 rounded px-2 py-1 text-sm">
<option value="500">Low Earth Orbit (500ms)</option>
<option value="1200" selected>Geostationary (1200ms)</option>
<option value="2500">Deep Space (2500ms)</option>
</select>
</div>
<div>
<span class="text-sm opacity-80">Error Rate:</span>
<select id="error-select" class="ml-2 bg-gray-800 border border-gray-700 rounded px-2 py-1 text-sm">
<option value="5">Clean (5%)</option>
<option value="15" selected>Moderate (15%)</option>
<option value="30">Noisy (30%)</option>
</select>
</div>
</div>
<div class="flex flex-wrap gap-3 justify-center mt-4">
<button id="start-btn" class="bg-green-600 hover:bg-green-700 text-white px-6 py-3 rounded-full font-bold transition flex items-center border border-green-400">
<i class="fas fa-play mr-2"></i> Start Transmission
</button>
<button id="step-btn" class="bg-blue-600 hover:bg-blue-700 text-white px-6 py-3 rounded-full font-bold transition flex items-center border border-blue-400">
<i class="fas fa-step-forward mr-2"></i> Single Packet
</button>
<button id="reset-btn" class="bg-gray-600 hover:bg-gray-700 text-white px-6 py-3 rounded-full font-bold transition flex items-center border border-gray-400">
<i class="fas fa-redo mr-2"></i> Reset
</button>
</div>
</div>
</div>
<!-- Stats Panel -->
<div class="transmission-box rounded-xl p-6">
<h3 class="text-xl font-bold text-yellow-300 mb-4 flex items-center">
<i class="fas fa-chart-line mr-2"></i> Mission Telemetry
</h3>
<div class="grid grid-cols-2 md:grid-cols-4 gap-4 text-center">
<div class="transmission-box p-3 rounded-lg">
<p class="text-sm text-blue-300 font-semibold">Packets Sent</p>
<p id="sent-count" class="text-2xl font-bold">0</p>
</div>
<div class="transmission-box p-3 rounded-lg">
<p class="text-sm text-green-300 font-semibold">ACKs Received</p>
<p id="ack-count" class="text-2xl font-bold">0</p>
</div>
<div class="transmission-box p-3 rounded-lg">
<p class="text-sm text-yellow-300 font-semibold">Timeouts</p>
<p id="timeout-count" class="text-2xl font-bold">0</p>
</div>
<div class="transmission-box p-3 rounded-lg">
<p class="text-sm text-red-300 font-semibold">Packet Loss</p>
<p id="loss-count" class="text-2xl font-bold">0</p>
</div>
</div>
<div class="mt-4 grid grid-cols-2 gap-4">
<div class="transmission-box p-3 rounded-lg">
<p class="text-sm text-purple-300 font-semibold">Round-Trip Time</p>
<p id="rtt-value" class="text-xl font-bold">0 ms</p>
</div>
<div class="transmission-box p-3 rounded-lg">
<p class="text-sm text-teal-300 font-semibold">Throughput</p>
<p id="throughput-value" class="text-xl font-bold">0 bps</p>
</div>
</div>
</div>
</div>
</div>
<!-- FAQ Section -->
<div class="mt-12 transmission-box rounded-xl p-6 relative z-10">
<h2 class="text-3xl font-bold text-orange-300 mb-6 flex items-center">
<i class="fas fa-question-circle mr-3"></i> Space Comms FAQ
</h2>
<div class="space-y-4">
<div class="border-b border-gray-700 pb-4">
<button class="faq-btn flex justify-between items-center w-full text-left font-semibold text-lg">
<span>Why use Stop-and-Wait instead of TCP in space? 🛰️</span>
<i class="fas fa-chevron-down transition-transform"></i>
</button>
<div class="faq-answer mt-2 opacity-90 hidden">
<p>TCP's congestion control and sliding window don't play nice with high latency space links. Stop-and-Wait's simplicity means:</p>
<ul class="list-disc pl-5 mt-2 space-y-1">
<li>No complex window size calculations</li>
<li>Lower memory requirements on space hardware</li>
<li>Better handling of intermittent connectivity</li>
<li>Predictable behavior with known latency</li>
</ul>
</div>
</div>
<div class="border-b border-gray-700 pb-4">
<button class="faq-btn flex justify-between items-center w-full text-left font-semibold text-lg">
<span>How do satellites handle Doppler shift? 📡</span>
<i class="fas fa-chevron-down transition-transform"></i>
</button>
<div class="faq-answer mt-2 opacity-90 hidden">
<p>Satellite systems use several techniques:</p>
<div class="grid grid-cols-2 gap-2 mt-2">
<div class="bg-gray-800 bg-opacity-50 p-2 rounded">
<p class="font-semibold text-blue-300">Frequency Prediction</p>
<p class="text-xs">Calculates expected shift based on orbit</p>
</div>
<div class="bg-gray-800 bg-opacity-50 p-2 rounded">
<p class="font-semibold text-purple-300">Automatic Compensation</p>
<p class="text-xs">Ground stations adjust in real-time</p>
</div>
<div class="bg-gray-800 bg-opacity-50 p-2 rounded">
<p class="font-semibold text-green-300">Wideband Receivers</p>
<p class="text-xs">Can receive across a range of frequencies</p>
</div>
<div class="bg-gray-800 bg-opacity-50 p-2 rounded">
<p class="font-semibold text-yellow-300">Differential Encoding</p>
<p class="text-xs">Encodes data as changes rather than absolute values</p>
</div>
</div>
</div>
</div>
<div class="border-b border-gray-700 pb-4">
<button class="faq-btn flex justify-between items-center w-full text-left font-semibold text-lg">
<span>What's the future of space IoT? 🚀</span>
<i class="fas fa-chevron-down transition-transform"></i>
</button>
<div class="faq-answer mt-2 opacity-90 hidden">
<div class="flex items-start">
<div class="mr-4 text-2xl text-yellow-300">
<i class="fas fa-star"></i>
</div>
<div>
<p>The next generation includes:</p>
<ul class="list-disc pl-5 mt-2 space-y-1">
<li>Mega-constellations of small satellites</li>
<li>Intersatellite laser links</li>
<li>AI-driven adaptive protocols</li>
<li>Quantum key distribution for security</li>
<li>Integration with 5G/6G networks</li>
</ul>
</div>
</div>
</div>
</div>
</div>
</div>
<!-- Footer -->
<footer class="mt-12 text-center opacity-80 relative z-10">
<p>Made with <i class="fas fa-heart text-red-400"></i> for space communication enthusiasts</p>
<p class="mt-2 text-sm">Ground Control to Major Vikram Kumar Yadav and Major Aditya Singh Gaur... your packets have been successfully received!</p>
</footer>
</div>
<script>
document.addEventListener('DOMContentLoaded', function() {
// Simulation variables
let sequenceNumber = 0;
let sentCount = 0;
let ackCount = 0;
let timeoutCount = 0;
let lossCount = 0;
let simulationInterval;
let isSimulating = false;
let lastPacketTime = 0;
let totalRtt = 0;
let packetSize = 128; // bytes
// DOM elements
const simulationArea = document.getElementById('simulation-area');
const startBtn = document.getElementById('start-btn');
const stepBtn = document.getElementById('step-btn');
const resetBtn = document.getElementById('reset-btn');
const sentCountEl = document.getElementById('sent-count');
const ackCountEl = document.getElementById('ack-count');
const timeoutCountEl = document.getElementById('timeout-count');
const lossCountEl = document.getElementById('loss-count');
const rttValueEl = document.getElementById('rtt-value');
const throughputValueEl = document.getElementById('throughput-value');
const signalQualityEl = document.getElementById('signal-quality');
const delaySelect = document.getElementById('delay-select');
const errorSelect = document.getElementById('error-select');
// Update signal quality display
function updateSignalQuality() {
const errorRate = parseInt(errorSelect.value);
let quality, snr;
if (errorRate <= 5) {
quality = "Excellent";
snr = "18dB";
} else if (errorRate <= 15) {
quality = "Good";
snr = "12dB";
} else {
quality = "Poor";
snr = "6dB";
}
signalQualityEl.textContent = `${quality} (SNR: ${snr})`;
}
// FAQ functionality
const faqBtns = document.querySelectorAll('.faq-btn');
faqBtns.forEach(btn => {
btn.addEventListener('click', function() {
const answer = this.nextElementSibling;
const icon = this.querySelector('i');
answer.classList.toggle('hidden');
icon.classList.toggle('rotate-180');
});
});
// Simulation functions
function sendPacket() {
const transmissionDelay = parseInt(delaySelect.value);
const errorRate = parseInt(errorSelect.value);
sequenceNumber++;
sentCount++;
sentCountEl.textContent = sentCount;
lastPacketTime = Date.now();
// Create packet element
const packet = document.createElement('div');
packet.className = 'transmission-box p-4 rounded-lg mb-2';
packet.innerHTML = `
<div class="flex justify-between items-center mb-1">
<div class="text-blue-300 font-semibold">Uplink #${sequenceNumber}</div>
<div class="text-xs opacity-70">${new Date().toLocaleTimeString()}</div>
</div>
<div class="text-sm opacity-90">
<div class="flex items-center">
<i class="fas fa-arrow-up text-blue-300 mr-2"></i>
<span>Sensor Data Packet (Seq: ${sequenceNumber % 2})</span>
</div>
<div class="mt-1 text-xs font-mono opacity-80">
${generateRandomHex(16)}
</div>
</div>
<div class="mt-2 flex items-center text-xs">
<span class="typing"></span>
<span class="typing"></span>
<span class="typing"></span>
<span class="ml-2">Transmitting to satellite...</span>
</div>
`;
packet.id = `packet-${sequenceNumber}`;
simulationArea.appendChild(packet);
simulationArea.scrollTop = simulationArea.scrollHeight;
// Randomly decide if packet will be lost
const isLost = Math.random() * 100 < errorRate;
if (isLost) {
lossCount++;
lossCountEl.textContent = lossCount;
setTimeout(() => {
packet.innerHTML += `
<div class="mt-2 text-sm text-red-300 font-semibold flex items-center">
<i class="fas fa-exclamation-triangle mr-2"></i>
<span>Packet lost! (Signal attenuation)</span>
</div>
`;
// Timeout after delay period
setTimeout(() => {
packet.innerHTML += `
<div class="mt-2 text-sm text-yellow-300 font-semibold flex items-center">
<i class="fas fa-clock mr-2"></i>
<span>Timeout! Resending packet...</span>
</div>
`;
timeoutCount++;
timeoutCountEl.textContent = timeoutCount;
// Resend the packet
setTimeout(sendPacket, 1000);
}, transmissionDelay);
}, transmissionDelay/2);
} else {
// Packet arrived successfully
setTimeout(() => {
packet.querySelector('.typing').parentElement.innerHTML = `
<div class="text-sm text-green-300 font-semibold flex items-center">
<i class="fas fa-check-circle mr-2"></i>
<span>Packet received by satellite</span>
</div>
`;
// Send ACK back
setTimeout(sendAck, transmissionDelay/2);
}, transmissionDelay/2);
}
}
function sendAck() {
const transmissionDelay = parseInt(delaySelect.value);
const errorRate = parseInt(errorSelect.value);
ackCount++;
ackCountEl.textContent = ackCount;
// Calculate RTT
const rtt = Date.now() - lastPacketTime;
totalRtt += rtt;
const avgRtt = totalRtt / ackCount;
rttValueEl.textContent = `${Math.round(avgRtt)} ms`;
// Calculate throughput (simplified)
const throughput = (packetSize * 8 * 1000) / avgRtt; // bits per second
throughputValueEl.textContent = `${Math.round(throughput)} bps`;
// Create ACK element
const ack = document.createElement('div');
ack.className = 'transmission-box p-4 rounded-lg ml-8';
ack.innerHTML = `
<div class="flex justify-between items-center mb-1">
<div class="text-purple-300 font-semibold">Downlink #${sequenceNumber}</div>
<div class="text-xs opacity-70">${new Date().toLocaleTimeString()}</div>
</div>
<div class="text-sm opacity-90">
<div class="flex items-center">
<i class="fas fa-arrow-down text-purple-300 mr-2"></i>
<span>ACK (For Seq: ${sequenceNumber % 2})</span>
</div>
<div class="mt-1 text-xs font-mono opacity-80">
ACK-${sequenceNumber}-${generateRandomHex(4)}
</div>
</div>
<div class="mt-2 flex items-center text-xs">
<span class="typing"></span>
<span class="typing"></span>
<span class="typing"></span>
<span class="ml-2">Transmitting to ground station...</span>
</div>
`;
ack.id = `ack-${sequenceNumber}`;
simulationArea.appendChild(ack);
simulationArea.scrollTop = simulationArea.scrollHeight;
// Randomly decide if ACK will be lost
const isLost = Math.random() * 100 < errorRate;
if (isLost) {
lossCount++;
lossCountEl.textContent = lossCount;
setTimeout(() => {
ack.innerHTML += `
<div class="mt-2 text-sm text-red-300 font-semibold flex items-center">
<i class="fas fa-exclamation-triangle mr-2"></i>
<span>ACK lost! (Solar interference)</span>
</div>
`;
// Timeout after delay period
setTimeout(() => {
ack.innerHTML += `
<div class="mt-2 text-sm text-yellow-300 font-semibold flex items-center">
<i class="fas fa-clock mr-2"></i>
<span>Timeout! Resending packet...</span>
</div>
`;
timeoutCount++;
timeoutCountEl.textContent = timeoutCount;
// Resend the packet
setTimeout(sendPacket, 1000);
}, transmissionDelay);
}, transmissionDelay/2);
} else {
// ACK arrived successfully
setTimeout(() => {
ack.querySelector('.typing').parentElement.innerHTML = `
<div class="text-sm text-green-300 font-semibold flex items-center">
<i class="fas fa-check-circle mr-2"></i>
<span>ACK received by ground station</span>
</div>
`;
if (isSimulating) {
// Continue simulation
setTimeout(sendPacket, 1000);
}
}, transmissionDelay/2);
}
}
// Helper function to generate random hex
function generateRandomHex(length) {
let result = '';
const characters = '0123456789ABCDEF';
for (let i = 0; i < length; i++) {
result += characters.charAt(Math.floor(Math.random() * characters.length));
if ((i+1) % 4 === 0 && i !== length-1) result += ' ';
}
return result;
}
// Event listeners
startBtn.addEventListener('click', function() {
if (!isSimulating) {
isSimulating = true;
startBtn.innerHTML = '<i class="fas fa-pause mr-2"></i> Pause Transmission';
startBtn.classList.remove('bg-green-600');
startBtn.classList.add('bg-yellow-600', 'hover:bg-yellow-700');
sendPacket();
} else {
isSimulating = false;
startBtn.innerHTML = '<i class="fas fa-play mr-2"></i> Continue Transmission';
startBtn.classList.remove('bg-yellow-600');
startBtn.classList.add('bg-green-600', 'hover:bg-green-700');
}
});
stepBtn.addEventListener('click', function() {
if (!isSimulating) {
sendPacket();
}
});
resetBtn.addEventListener('click', function() {
// Reset variables
sequenceNumber = 0;
sentCount = 0;
ackCount = 0;
timeoutCount = 0;
lossCount = 0;
isSimulating = false;
totalRtt = 0;
// Reset UI
simulationArea.innerHTML = `
<div class="transmission-box p-4 rounded-lg">
<div class="flex justify-between items-center mb-1">
<div class="text-blue-300 font-semibold">Ground Control</div>
<div class="text-xs opacity-70">System Reset</div>
</div>
<div class="text-sm opacity-90">
Space IoT transmission simulator initialized. Waiting for commands...
</div>
</div>
`;
sentCountEl.textContent = '0';
ackCountEl.textContent = '0';
timeoutCountEl.textContent = '0';
lossCountEl.textContent = '0';
rttValueEl.textContent = '0 ms';
throughputValueEl.textContent = '0 bps';
startBtn.innerHTML = '<i class="fas fa-play mr-2"></i> Start Transmission';
startBtn.classList.remove('bg-yellow-600');
startBtn.classList.add('bg-green-600', 'hover:bg-green-700');
});
// Update signal quality when error rate changes
errorSelect.addEventListener('change', updateSignalQuality);
// Initial signal quality update
updateSignalQuality();
});
</script>
</body>
</html> |