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amiloop.html
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<!DOCTYPE html>
<html>
<head>
<title>AmiLoop WebBluetooth</title>
<meta charset="UTF-8" />
<style type="text/css">
body {
font-family: -apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji";
}
</style>
</head>
<body>
<h1>AmiLoop Management</h1>
<p>This page uses WebBluetooth to manage the AmiLoop.</p>
<p><a id="connectDisconnect" href="#">Connect</a></p>
<div id="connectedStuff" style="display: none;">
<p><strong>Firmware:</strong> <span id="firmware"></span></p>
<ul>
<li><a id="uploadTag" href="#">Upload tag data</a></li>
<li><a id="clearTag" href="#">Write blank tag</a></li>
<li><a id="manualMode" href="#">Set manual mode</a></li>
<li><a id="sequentialMode" href="#">Set sequential mode</a></li>
<li><a id="automaticMode" href="#">Set automatic mode</a></li>
<li><a id="resetAmiloop" href="#">Reset AmiLoop</a></li>
</ul>
</div>
<script>
var blockerElement = document.createElement("div");
blockerElement.style = "background-color: rgba(0, 0, 0, 0.5); align-items: center; justify-content: center; position: fixed; inset: 0px; backdrop-filter: blur(4px); color: white; font-weight: bold; font-size: 2rem; display: none; transition: all 0.3s ease 0s; opacity: 0;";
document.body.append(blockerElement);
var amiLoop = null;
/**
* Prompts the user to select a file and returns its contents as a Uint8Array.
* @returns {Promise<Uint8Array>} A promise that resolves with the file contents as a Uint8Array.
* @throws {Error} If no file is selected or if there is an error reading the file.
*/
function promptForFileAndGetContents() {
return new Promise((resolve, reject) => {
// Create an input element
const input = document.createElement('input');
input.type = 'file';
// Handle file selection
input.onchange = (event) => {
var _a;
const target = event.target;
const file = (_a = target.files) === null || _a === void 0 ? void 0 : _a[0];
if (file) {
const reader = new FileReader();
reader.onload = (loadEvent) => {
var _a;
const result = (_a = loadEvent.target) === null || _a === void 0 ? void 0 : _a.result;
if (result instanceof ArrayBuffer) {
resolve(new Uint8Array(result));
} else {
reject(new Error('Failed to read file contents.'));
}
};
reader.onerror = () => {
reject(new Error('Failed to read file.'));
};
reader.readAsArrayBuffer(file);
} else {
reject(new Error('No file selected.'));
}
};
// Trigger file selection
input.click();
});
}
/**
* Performs bitwise XOR operation on a byte array and returns the result.
* @param {Uint8Array} byteArray - The input byte array.
* @returns {number} The result of XOR operation.
* @throws {Error} If the input byte array is empty.
*/
function xorByteArray(byteArray) {
if (!byteArray || byteArray.length === 0) {
throw new Error("Empty collection can't be reduced.");
}
let result = byteArray[0];
for (let i = 1; i < byteArray.length; i++) {
result ^= byteArray[i];
}
return result & 0xff;
}
/**
* Processes a Uint8Array by splitting it into chunks and adding header and footer bytes to each chunk.
* @param {Uint8Array} input - The input Uint8Array to process.
* @returns {Uint8Array[]} An array of processed chunks.
*/
function processUint8Array(input) {
const output = [];
let start = 0;
while (start < input.length) {
const chunkSize = Math.min(128, input.length - start);
const chunk = input.slice(start, start + chunkSize);
const newData = new Uint8Array(5 + chunk.length + 2);
newData[0] = 0x02;
newData[1] = chunk.length + 3;
newData[2] = 0x87;
newData[3] = chunk.length < 128 ? 1 : 0;
newData[4] = output.length;
newData.set(chunk, 5);
const xorValue = xorByteArray(newData.slice(1, newData.length - 2));
newData[newData.length - 2] = xorValue;
newData[newData.length - 1] = 0x03;
output.push(newData);
start += chunkSize;
}
return output;
}
/**
* Converts an ArrayBuffer to a hexadecimal string.
* @param {ArrayBuffer} buffer - The input ArrayBuffer to convert.
* @returns {string} The hexadecimal representation of the input buffer.
*/
function buf2hex(buffer) {
buffer = new Uint8Array(buffer);
let result = '';
for (let i = 0; i < buffer.length; i++) {
const hex = buffer[i].toString(16).padStart(2, '0');
result += hex.toUpperCase() + ' ';
if ((i + 1) % 8 === 0) {
result += '\n';
}
}
return result.trim();
}
async function connectToAmiLoop(onDisconnect, deviceIdentifier) {
try {
let device;
// Check if deviceIdentifier is provided and reconnect if available
if (deviceIdentifier && navigator.bluetooth.getDevices) {
const devices = await navigator.bluetooth.getDevices();
device = devices.find(d => d.id === deviceIdentifier);
}
// If device not found or deviceIdentifier not provided, perform a new scan
if (!device) {
device = await navigator.bluetooth.requestDevice({
filters: [{
name: 'AmiLoop'
}],
optionalServices: ['6e400001-b5a3-f393-e0a9-e50e24dcca9e']
});
}
await device.gatt.disconnect();
const server = await device.gatt.connect();
const service = await server.getPrimaryService('6e400001-b5a3-f393-e0a9-e50e24dcca9e');
const characteristicTX = await service.getCharacteristic('6e400002-b5a3-f393-e0a9-e50e24dcca9e');
const characteristicRX = await service.getCharacteristic('6e400003-b5a3-f393-e0a9-e50e24dcca9e');
// Add disconnect event listener
device.addEventListener('gattserverdisconnected', () => {
if (typeof onDisconnect === 'function') {
onDisconnect();
}
});
characteristicRX.addEventListener('characteristicvaluechanged', function(event) {
const data = event.target.value;
// Handle received data here
console.log(`\x1B[1mRead data\x1B[m\n${buf2hex(data.buffer)}`);
});
await characteristicRX.startNotifications();
const characteristics = {
device,
service,
server,
characteristicTX,
characteristicRX,
firmware: undefined
}
// Some kind of handshake, maybe?
const handshakeResponse = new Uint8Array((await sendAndWait(characteristics, Uint8Array.from([0x02, 0x01, 0x89, 0x88, 0x03]))).buffer);
characteristics.firmware = new TextDecoder().decode(handshakeResponse.slice(3, 3 + handshakeResponse[1]));
return characteristics;
} catch (error) {
console.error('Error:', error);
throw error;
}
}
function sendAndWait(characteristics, data) {
return new Promise(async (resolve, reject) => {
try {
const { characteristicTX, characteristicRX } = characteristics;
function innerResolve(event) {
characteristicRX.removeEventListener('characteristicvaluechanged', innerResolve)
resolve(event.target.value)
}
characteristicRX.addEventListener('characteristicvaluechanged', innerResolve);
await characteristicTX.writeValueWithResponse(data);
} catch (error) {
console.error('Error:', error);
reject(error);
}
})
}
async function sendDataToAmiLoop(characteristics, data, noWait) {
let i = 0;
try {
const { characteristicTX, characteristicRX } = characteristics;
for (const byteArray of data) {
blockerElement.innerText = `Sending ${++i} / ${data.length}`;
console.log(`\x1B[1mWrite data\x1B[m\n${buf2hex(byteArray)}`);
if (noWait) {
await characteristicTX.writeValueWithResponse(byteArray);
} else {
await sendAndWait(characteristics, byteArray);
}
}
} catch (error) {
console.error('Error:', error);
throw error;
}
}
async function setModeManual() {
await sendDataToAmiLoop(amiLoop, [Uint8Array.from([0x02, 0x02, 0x8a, 0x00, 0x88, 0x03])])
}
async function setModeSequential() {
await sendDataToAmiLoop(amiLoop, [Uint8Array.from([0x02, 0x02, 0x8a, 0x01, 0x89, 0x03])])
}
async function setModeAutomatic() {
await sendDataToAmiLoop(amiLoop, [Uint8Array.from([0x02, 0x02, 0x8a, 0x02, 0x8a, 0x03])])
}
async function resetAmiLoop() {
await sendDataToAmiLoop(amiLoop, [Uint8Array.from([0x12, 0x0d, 0x00, 0x02, 0x01, 0x8f, 0x8e, 0x03])], true)
}
/**
* This function generates and returns a 572-byte array populated with the data of a blank NTAG215 with a random UID.
* @returns An array with blank NTAG215 data.
*/
function getBlankNtag() {
const tag = new Uint8Array(572)
tag[0] = 0x04
tag[1] = Math.round(Math.random() * 255)
tag[2] = Math.round(Math.random() * 255)
tag[3] = tag[0] ^ tag[1] ^ tag[2] ^ 0x88
tag[4] = Math.round(Math.random() * 255)
tag[5] = Math.round(Math.random() * 255)
tag[6] = Math.round(Math.random() * 255)
tag[7] = Math.round(Math.random() * 255)
tag[8] = tag[4] ^ tag[5] ^ tag[6] ^ tag[7]
tag.set([0x48, 0x00, 0x00, 0xE1, 0x10, 0x3E, 0x00, 0x03, 0x00, 0xFE], 0x09)
tag.set([0xBD, 0x04, 0x00, 0x00, 0xFF, 0x00, 0x05], 0x20B)
return tag
}
function onConnected() {
document.getElementById("connectedStuff").style.display = "";
document.getElementById("firmware").innerText = amiLoop.firmware.toString();
}
function onDisconnected() {
document.getElementById("connectedStuff").style.display = "none";
}
function showBlocker() {
blockerElement.innerText = "";
blockerElement.style.display = "flex";
setTimeout(() => blockerElement.style.opacity = "1.0", 1);
}
function hideBlocker() {
blockerElement.style.opacity = 0;
setTimeout(() => blockerElement.style.display = "none", 300);
}
document.getElementById("connectDisconnect").addEventListener("click", async function(e) {
e.preventDefault();
if (amiLoop) {
await amiLoop.server.disconnect();
amiLoop = null;
return;
}
amiLoop = await connectToAmiLoop(() => {
amiLoop = null;
this.innerText = "Connect";
onDisconnected();
}, this.dataset.previousDevice);
this.innerText = "Disconnect"
onConnected();
});
document.getElementById("uploadTag").addEventListener("click", async function(e) {
e.preventDefault();
var fileData = await promptForFileAndGetContents();
var tagData = new Uint8Array(540);
tagData.set(fileData.slice(0, Math.min(540, fileData.length)), 0);
tagData[536] = 0x80;
tagData[537] = 0x80;
var chunkedData = processUint8Array(tagData);
showBlocker();
await sendDataToAmiLoop(amiLoop, chunkedData);
hideBlocker();
})
document.getElementById("clearTag").addEventListener("click", async function(e) {
e.preventDefault();
var tagData = new Uint8Array(540);
tagData.set(getBlankNtag().slice(0, 540), 0);
tagData[536] = 0x80;
tagData[537] = 0x80;
var chunkedData = processUint8Array(tagData);
showBlocker();
await sendDataToAmiLoop(amiLoop, chunkedData);
hideBlocker();
})
document.getElementById("manualMode").addEventListener("click", async function(e) {
e.preventDefault();
showBlocker();
await setModeManual();
hideBlocker();
})
document.getElementById("sequentialMode").addEventListener("click", async function(e) {
e.preventDefault();
showBlocker();
await setModeSequential();
hideBlocker();
})
document.getElementById("automaticMode").addEventListener("click", async function(e) {
e.preventDefault();
showBlocker();
await setModeAutomatic();
hideBlocker();
})
document.getElementById("resetAmiloop").addEventListener("click", async function(e) {
e.preventDefault();
showBlocker();
await resetAmiLoop();
hideBlocker();
})
</script>
</body>
</html>