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Immogen — Ninebot G30 BLE Immobilizer

Immogen is a three-part BLE immobilizer system for the Ninebot Max G30, consisting of Uguisu (key fob), Guillemot (deck receiver), and Whimbrel (Web Serial provisioning app).

Guillemot sits inline between the battery and ESC via an XT60 splice. Without a valid BLE unlock from Uguisu, the scooter stays inoperable. Male/female pigtails keep the install reversible—no permanent modification required.

┌─────────────────┐ BLE advertisement ┌──────────────────────┐
│ UGUISU (FOB) │ ─────────────────────────────> │ GUILLEMOT (RECEIVER) │
│ XIAO nRF52840 │ (2.4 GHz, ~2 m) │ XIAO nRF52840 │
└───────┬─────────┘ └──────────┬───────────┘
│ │
│ ┌────────────────────┐ │
└──────(USB-C)──> │ WHIMBREL (WEB APP) │ <──(USB-C)───┘
(Provisioning) │ Chrome / Edge │ (Provisioning)
└────────────────────┘

Repository Structure

PathDescription
Uguisu/Key fob — firmware, KiCad, BOM. Button press → 2 s BLE broadcast → sleep. README
Guillemot/Deck receiver — firmware, KiCad, BOM. Duty-cycled scan (5%), validates adverts → SR latch → power gate. README
lib/Shared C++ library: AES-128-CCM MIC, provisioning loop, LittleFS counter storage
tools/LED visualizer, BLE timing simulator, buzzer tuner (HTML); MIC test vectors (gen_mic.py)
logs/Technical writeups: architecture reviews, BLE power analysis, design decisions, migration guides, documentation reports

BLE Protocol

Advertisement-only; no persistent connection. Both devices share a company ID, a 2-byte magic prefix (0x494D), and a pre-shared key (PSK). Each advertisement carries a 13-byte payload after the manufacturer specific data header (company ID + magic):

OffsetSizeFieldPurpose
04counterAnti-replay, monotonic (AAD)
41command0x01 = Unlock, 0x02 = Lock (Encrypted)
58micAES-128-CCM auth tag

Quick Start

Pre-built firmware is available on the Releases page. Use Whimbrel to flash and provision keys via Web Serial.

Build from source:

# Deck receivercd Guillemot/firmware && pio run
# Key fobcd Uguisu/firmware && pio run

Roadmap

  • Uguisu enclosure CAD (3D print).
  • First-build validation: PPK2 power, BLE range through deck, pre-charge waveform.

Safety & Legal

  • Prototype security/power-interrupt device. Use at your own risk.
  • Not affiliated with Segway-Ninebot.
  • Do not test lock behavior while riding.

About

BLE immobilizer for Ninebot Max G30 — Uguisu fob, Guillemot receiver. Firmware + KiCad. Provision via Whimbrel.

Topics

bleimmobilizerkicadninebotnrf52840platformioxiao

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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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Immogen — Ninebot G30 BLE Immobilizer
Immogen is a three-part BLE immobilizer system for the Ninebot Max G30, consisting of Uguisu (key fob), Guillemot (deck receiver), and Whimbrel (Web Serial provisioning app).
Guillemot sits inline between the battery and ESC via an XT60 splice. Without a valid BLE unlock from Uguisu, the scooter stays inoperable. Male/female pigtails keep the install reversible—no permanent modification required.
┌─────────────────┐ BLE advertisement ┌──────────────────────┐
│ UGUISU (FOB) │ ─────────────────────────────> │ GUILLEMOT (RECEIVER) │
│ XIAO nRF52840 │ (2.4 GHz, ~2 m) │ XIAO nRF52840 │
└───────┬─────────┘ └──────────┬───────────┘
│ │
│ ┌────────────────────┐ │
└──────(USB-C)──> │ WHIMBREL (WEB APP) │ <──(USB-C)───┘
(Provisioning) │ Chrome / Edge │ (Provisioning)
└────────────────────┘

Repository Structure
PathDescription
Uguisu/Key fob — firmware, KiCad, BOM. Button press → 2 s BLE broadcast → sleep. README
Guillemot/Deck receiver — firmware, KiCad, BOM. Duty-cycled scan (5%), validates adverts → SR latch → power gate. README
lib/Shared C++ library: AES-128-CCM MIC, provisioning loop, LittleFS counter storage
tools/LED visualizer, BLE timing simulator, buzzer tuner (HTML); MIC test vectors (gen_mic.py)
logs/Technical writeups: architecture reviews, BLE power analysis, design decisions, migration guides, documentation reports
BLE Protocol
Advertisement-only; no persistent connection. Both devices share a company ID, a 2-byte magic prefix (0x494D), and a pre-shared key (PSK). Each advertisement carries a 13-byte payload after the manufacturer specific data header (company ID + magic):
OffsetSizeFieldPurpose
04counterAnti-replay, monotonic (AAD)
41command0x01 = Unlock, 0x02 = Lock (Encrypted)
58micAES-128-CCM auth tag
Quick Start
Pre-built firmware is available on the Releases page. Use Whimbrel to flash and provision keys via Web Serial.
Build from source:
# Deck receivercd Guillemot/firmware && pio run
# Key fobcd Uguisu/firmware && pio run
Roadmap
  • Uguisu enclosure CAD (3D print).
  • First-build validation: PPK2 power, BLE range through deck, pre-charge waveform.
Safety & Legal
  • Prototype security/power-interrupt device. Use at your own risk.
  • Not affiliated with Segway-Ninebot.
  • Do not test lock behavior while riding.
About
BLE immobilizer for Ninebot Max G30 — Uguisu fob, Guillemot receiver. Firmware + KiCad. Provision via Whimbrel.
Topics
bleimmobilizerkicadninebotnrf52840platformioxiao
Resources
Readme
Activity
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0 watching
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Immogen — Ninebot G30 BLE Immobilizer
Immogen is a three-part BLE immobilizer system for the Ninebot Max G30, consisting of Uguisu (key fob), Guillemot (deck receiver), and Whimbrel (Web Serial provisioning app).
Guillemot sits inline between the battery and ESC via an XT60 splice. Without a valid BLE unlock from Uguisu, the scooter stays inoperable. Male/female pigtails keep the install reversible—no permanent modification required.
┌─────────────────┐ BLE advertisement ┌──────────────────────┐
│ UGUISU (FOB) │ ─────────────────────────────> │ GUILLEMOT (RECEIVER) │
│ XIAO nRF52840 │ (2.4 GHz, ~2 m) │ XIAO nRF52840 │
└───────┬─────────┘ └──────────┬───────────┘
│ │
│ ┌────────────────────┐ │
└──────(USB-C)──> │ WHIMBREL (WEB APP) │ <──(USB-C)───┘
(Provisioning) │ Chrome / Edge │ (Provisioning)
└────────────────────┘

Repository Structure
PathDescription
Uguisu/Key fob — firmware, KiCad, BOM. Button press → 2 s BLE broadcast → sleep. README
Guillemot/Deck receiver — firmware, KiCad, BOM. Duty-cycled scan (5%), validates adverts → SR latch → power gate. README
lib/Shared C++ library: AES-128-CCM MIC, provisioning loop, LittleFS counter storage
tools/LED visualizer, BLE timing simulator, buzzer tuner (HTML); MIC test vectors (gen_mic.py)
logs/Technical writeups: architecture reviews, BLE power analysis, design decisions, migration guides, documentation reports
BLE Protocol
Advertisement-only; no persistent connection. Both devices share a company ID, a 2-byte magic prefix (0x494D), and a pre-shared key (PSK). Each advertisement carries a 13-byte payload after the manufacturer specific data header (company ID + magic):
OffsetSizeFieldPurpose
04counterAnti-replay, monotonic (AAD)
41command0x01 = Unlock, 0x02 = Lock (Encrypted)
58micAES-128-CCM auth tag
Quick Start
Pre-built firmware is available on the Releases page. Use Whimbrel to flash and provision keys via Web Serial.
Build from source:
# Deck receivercd Guillemot/firmware && pio run
# Key fobcd Uguisu/firmware && pio run
Roadmap
  • Uguisu enclosure CAD (3D print).
  • First-build validation: PPK2 power, BLE range through deck, pre-charge waveform.
Safety & Legal
  • Prototype security/power-interrupt device. Use at your own risk.
  • Not affiliated with Segway-Ninebot.
  • Do not test lock behavior while riding.
About
BLE immobilizer for Ninebot Max G30 — Uguisu fob, Guillemot receiver. Firmware + KiCad. Provision via Whimbrel.
Topics
bleimmobilizerkicadninebotnrf52840platformioxiao
Resources
Readme
Activity
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Immogen — Ninebot G30 BLE Immobilizer
Immogen is a three-part BLE immobilizer system for the Ninebot Max G30, consisting of Uguisu (key fob), Guillemot (deck receiver), and Whimbrel (Web Serial provisioning app).
Guillemot sits inline between the battery and ESC via an XT60 splice. Without a valid BLE unlock from Uguisu, the scooter stays inoperable. Male/female pigtails keep the install reversible—no permanent modification required.
┌─────────────────┐ BLE advertisement ┌──────────────────────┐
│ UGUISU (FOB) │ ─────────────────────────────> │ GUILLEMOT (RECEIVER) │
│ XIAO nRF52840 │ (2.4 GHz, ~2 m) │ XIAO nRF52840 │
└───────┬─────────┘ └──────────┬───────────┘
│ │
│ ┌────────────────────┐ │
└──────(USB-C)──> │ WHIMBREL (WEB APP) │ <──(USB-C)───┘
(Provisioning) │ Chrome / Edge │ (Provisioning)
└────────────────────┘

Repository Structure
PathDescription
Uguisu/Key fob — firmware, KiCad, BOM. Button press → 2 s BLE broadcast → sleep. README
Guillemot/Deck receiver — firmware, KiCad, BOM. Duty-cycled scan (5%), validates adverts → SR latch → power gate. README
lib/Shared C++ library: AES-128-CCM MIC, provisioning loop, LittleFS counter storage
tools/LED visualizer, BLE timing simulator, buzzer tuner (HTML); MIC test vectors (gen_mic.py)
logs/Technical writeups: architecture reviews, BLE power analysis, design decisions, migration guides, documentation reports
BLE Protocol
Advertisement-only; no persistent connection. Both devices share a company ID, a 2-byte magic prefix (0x494D), and a pre-shared key (PSK). Each advertisement carries a 13-byte payload after the manufacturer specific data header (company ID + magic):
OffsetSizeFieldPurpose
04counterAnti-replay, monotonic (AAD)
41command0x01 = Unlock, 0x02 = Lock (Encrypted)
58micAES-128-CCM auth tag
Quick Start
Pre-built firmware is available on the Releases page. Use Whimbrel to flash and provision keys via Web Serial.
Build from source:
# Deck receivercd Guillemot/firmware && pio run
# Key fobcd Uguisu/firmware && pio run
Roadmap
  • Uguisu enclosure CAD (3D print).
  • First-build validation: PPK2 power, BLE range through deck, pre-charge waveform.
Safety & Legal
  • Prototype security/power-interrupt device. Use at your own risk.
  • Not affiliated with Segway-Ninebot.
  • Do not test lock behavior while riding.
About
BLE immobilizer for Ninebot Max G30 — Uguisu fob, Guillemot receiver. Firmware + KiCad. Provision via Whimbrel.
Topics
bleimmobilizerkicadninebotnrf52840platformioxiao
Resources
Readme
Activity
Stars
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Watchers
0 watching
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0 forks
Report repository
Releases
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

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Immogen — Ninebot G30 BLE Immobilizer
Immogen is a three-part BLE immobilizer system for the Ninebot Max G30, consisting of Uguisu (key fob), Guillemot (deck receiver), and Whimbrel (Web Serial provisioning app).
Guillemot sits inline between the battery and ESC via an XT60 splice. Without a valid BLE unlock from Uguisu, the scooter stays inoperable. Male/female pigtails keep the install reversible—no permanent modification required.
┌─────────────────┐ BLE advertisement ┌──────────────────────┐
│ UGUISU (FOB) │ ─────────────────────────────> │ GUILLEMOT (RECEIVER) │
│ XIAO nRF52840 │ (2.4 GHz, ~2 m) │ XIAO nRF52840 │
└───────┬─────────┘ └──────────┬───────────┘
│ │
│ ┌────────────────────┐ │
└──────(USB-C)──> │ WHIMBREL (WEB APP) │ <──(USB-C)───┘
(Provisioning) │ Chrome / Edge │ (Provisioning)
└────────────────────┘

Repository Structure
PathDescription
Uguisu/Key fob — firmware, KiCad, BOM. Button press → 2 s BLE broadcast → sleep. README
Guillemot/Deck receiver — firmware, KiCad, BOM. Duty-cycled scan (5%), validates adverts → SR latch → power gate. README
lib/Shared C++ library: AES-128-CCM MIC, provisioning loop, LittleFS counter storage
tools/LED visualizer, BLE timing simulator, buzzer tuner (HTML); MIC test vectors (gen_mic.py)
logs/Technical writeups: architecture reviews, BLE power analysis, design decisions, migration guides, documentation reports
BLE Protocol
Advertisement-only; no persistent connection. Both devices share a company ID, a 2-byte magic prefix (0x494D), and a pre-shared key (PSK). Each advertisement carries a 13-byte payload after the manufacturer specific data header (company ID + magic):
OffsetSizeFieldPurpose
04counterAnti-replay, monotonic (AAD)
41command0x01 = Unlock, 0x02 = Lock (Encrypted)
58micAES-128-CCM auth tag
Quick Start
Pre-built firmware is available on the Releases page. Use Whimbrel to flash and provision keys via Web Serial.
Build from source:
# Deck receivercd Guillemot/firmware && pio run
# Key fobcd Uguisu/firmware && pio run
Roadmap
  • Uguisu enclosure CAD (3D print).
  • First-build validation: PPK2 power, BLE range through deck, pre-charge waveform.
Safety & Legal
  • Prototype security/power-interrupt device. Use at your own risk.
  • Not affiliated with Segway-Ninebot.
  • Do not test lock behavior while riding.
About
BLE immobilizer for Ninebot Max G30 — Uguisu fob, Guillemot receiver. Firmware + KiCad. Provision via Whimbrel.
Topics
bleimmobilizerkicadninebotnrf52840platformioxiao
Resources
Readme
Activity
Stars
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Watchers
0 watching
Forks
0 forks
Report repository
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
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Immogen — Ninebot G30 BLE Immobilizer
Immogen is a three-part BLE immobilizer system for the Ninebot Max G30, consisting of Uguisu (key fob), Guillemot (deck receiver), and Whimbrel (Web Serial provisioning app).
Guillemot sits inline between the battery and ESC via an XT60 splice. Without a valid BLE unlock from Uguisu, the scooter stays inoperable. Male/female pigtails keep the install reversible—no permanent modification required.
┌─────────────────┐ BLE advertisement ┌──────────────────────┐
│ UGUISU (FOB) │ ─────────────────────────────> │ GUILLEMOT (RECEIVER) │
│ XIAO nRF52840 │ (2.4 GHz, ~2 m) │ XIAO nRF52840 │
└───────┬─────────┘ └──────────┬───────────┘
│ │
│ ┌────────────────────┐ │
└──────(USB-C)──> │ WHIMBREL (WEB APP) │ <──(USB-C)───┘
(Provisioning) │ Chrome / Edge │ (Provisioning)
└────────────────────┘

Repository Structure
PathDescription
Uguisu/Key fob — firmware, KiCad, BOM. Button press → 2 s BLE broadcast → sleep. README
Guillemot/Deck receiver — firmware, KiCad, BOM. Duty-cycled scan (5%), validates adverts → SR latch → power gate. README
lib/Shared C++ library: AES-128-CCM MIC, provisioning loop, LittleFS counter storage
tools/LED visualizer, BLE timing simulator, buzzer tuner (HTML); MIC test vectors (gen_mic.py)
logs/Technical writeups: architecture reviews, BLE power analysis, design decisions, migration guides, documentation reports
BLE Protocol
Advertisement-only; no persistent connection. Both devices share a company ID, a 2-byte magic prefix (0x494D), and a pre-shared key (PSK). Each advertisement carries a 13-byte payload after the manufacturer specific data header (company ID + magic):
OffsetSizeFieldPurpose
04counterAnti-replay, monotonic (AAD)
41command0x01 = Unlock, 0x02 = Lock (Encrypted)
58micAES-128-CCM auth tag
Quick Start
Pre-built firmware is available on the Releases page. Use Whimbrel to flash and provision keys via Web Serial.
Build from source:
# Deck receivercd Guillemot/firmware && pio run
# Key fobcd Uguisu/firmware && pio run
Roadmap
  • Uguisu enclosure CAD (3D print).
  • First-build validation: PPK2 power, BLE range through deck, pre-charge waveform.
Safety & Legal
  • Prototype security/power-interrupt device. Use at your own risk.
  • Not affiliated with Segway-Ninebot.
  • Do not test lock behavior while riding.
About
BLE immobilizer for Ninebot Max G30 — Uguisu fob, Guillemot receiver. Firmware + KiCad. Provision via Whimbrel.
Topics
bleimmobilizerkicadninebotnrf52840platformioxiao
Resources
Readme
Activity
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
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Immogen — Ninebot G30 BLE Immobilizer
Immogen is a three-part BLE immobilizer system for the Ninebot Max G30, consisting of Uguisu (key fob), Guillemot (deck receiver), and Whimbrel (Web Serial provisioning app).
Guillemot sits inline between the battery and ESC via an XT60 splice. Without a valid BLE unlock from Uguisu, the scooter stays inoperable. Male/female pigtails keep the install reversible—no permanent modification required.
┌─────────────────┐ BLE advertisement ┌──────────────────────┐
│ UGUISU (FOB) │ ─────────────────────────────> │ GUILLEMOT (RECEIVER) │
│ XIAO nRF52840 │ (2.4 GHz, ~2 m) │ XIAO nRF52840 │
└───────┬─────────┘ └──────────┬───────────┘
│ │
│ ┌────────────────────┐ │
└──────(USB-C)──> │ WHIMBREL (WEB APP) │ <──(USB-C)───┘
(Provisioning) │ Chrome / Edge │ (Provisioning)
└────────────────────┘

Repository Structure
PathDescription
Uguisu/Key fob — firmware, KiCad, BOM. Button press → 2 s BLE broadcast → sleep. README
Guillemot/Deck receiver — firmware, KiCad, BOM. Duty-cycled scan (5%), validates adverts → SR latch → power gate. README
lib/Shared C++ library: AES-128-CCM MIC, provisioning loop, LittleFS counter storage
tools/LED visualizer, BLE timing simulator, buzzer tuner (HTML); MIC test vectors (gen_mic.py)
logs/Technical writeups: architecture reviews, BLE power analysis, design decisions, migration guides, documentation reports
BLE Protocol
Advertisement-only; no persistent connection. Both devices share a company ID, a 2-byte magic prefix (0x494D), and a pre-shared key (PSK). Each advertisement carries a 13-byte payload after the manufacturer specific data header (company ID + magic):
OffsetSizeFieldPurpose
04counterAnti-replay, monotonic (AAD)
41command0x01 = Unlock, 0x02 = Lock (Encrypted)
58micAES-128-CCM auth tag
Quick Start
Pre-built firmware is available on the Releases page. Use Whimbrel to flash and provision keys via Web Serial.
Build from source:
# Deck receivercd Guillemot/firmware && pio run
# Key fobcd Uguisu/firmware && pio run
Roadmap
  • Uguisu enclosure CAD (3D print).
  • First-build validation: PPK2 power, BLE range through deck, pre-charge waveform.
Safety & Legal
  • Prototype security/power-interrupt device. Use at your own risk.
  • Not affiliated with Segway-Ninebot.
  • Do not test lock behavior while riding.
About
BLE immobilizer for Ninebot Max G30 — Uguisu fob, Guillemot receiver. Firmware + KiCad. Provision via Whimbrel.
Topics
bleimmobilizerkicadninebotnrf52840platformioxiao
Resources
Readme
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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Immogen — Ninebot G30 BLE Immobilizer
Immogen is a three-part BLE immobilizer system for the Ninebot Max G30, consisting of Uguisu (key fob), Guillemot (deck receiver), and Whimbrel (Web Serial provisioning app).
Guillemot sits inline between the battery and ESC via an XT60 splice. Without a valid BLE unlock from Uguisu, the scooter stays inoperable. Male/female pigtails keep the install reversible—no permanent modification required.
┌─────────────────┐ BLE advertisement ┌──────────────────────┐
│ UGUISU (FOB) │ ─────────────────────────────> │ GUILLEMOT (RECEIVER) │
│ XIAO nRF52840 │ (2.4 GHz, ~2 m) │ XIAO nRF52840 │
└───────┬─────────┘ └──────────┬───────────┘
│ │
│ ┌────────────────────┐ │
└──────(USB-C)──> │ WHIMBREL (WEB APP) │ <──(USB-C)───┘
(Provisioning) │ Chrome / Edge │ (Provisioning)
└────────────────────┘

Repository Structure
PathDescription
Uguisu/Key fob — firmware, KiCad, BOM. Button press → 2 s BLE broadcast → sleep. README
Guillemot/Deck receiver — firmware, KiCad, BOM. Duty-cycled scan (5%), validates adverts → SR latch → power gate. README
lib/Shared C++ library: AES-128-CCM MIC, provisioning loop, LittleFS counter storage
tools/LED visualizer, BLE timing simulator, buzzer tuner (HTML); MIC test vectors (gen_mic.py)
logs/Technical writeups: architecture reviews, BLE power analysis, design decisions, migration guides, documentation reports
BLE Protocol
Advertisement-only; no persistent connection. Both devices share a company ID, a 2-byte magic prefix (0x494D), and a pre-shared key (PSK). Each advertisement carries a 13-byte payload after the manufacturer specific data header (company ID + magic):
OffsetSizeFieldPurpose
04counterAnti-replay, monotonic (AAD)
41command0x01 = Unlock, 0x02 = Lock (Encrypted)
58micAES-128-CCM auth tag
Quick Start
Pre-built firmware is available on the Releases page. Use Whimbrel to flash and provision keys via Web Serial.
Build from source:
# Deck receivercd Guillemot/firmware && pio run
# Key fobcd Uguisu/firmware && pio run
Roadmap
  • Uguisu enclosure CAD (3D print).
  • First-build validation: PPK2 power, BLE range through deck, pre-charge waveform.
Safety & Legal
  • Prototype security/power-interrupt device. Use at your own risk.
  • Not affiliated with Segway-Ninebot.
  • Do not test lock behavior while riding.
About
BLE immobilizer for Ninebot Max G30 — Uguisu fob, Guillemot receiver. Firmware + KiCad. Provision via Whimbrel.
Topics
bleimmobilizerkicadninebotnrf52840platformioxiao
Resources
Readme
Activity
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages