Fossibot / AFERIY / SYDPOWER Control PWA

Unlock the full potential of your portable power station.

This Progressive Web App (PWA) allows you to control and monitor your Fossibot F2400, F3600 Pro, and similar power stations directly from your browser via Bluetooth Low Energy (BLE). It bypasses the need for the official cloud-dependent app, offering a private, offline-first, and feature-rich alternative. This has only been fully tested on a Fossibot anf Afirty but should work on SYDPOWER and ABOK. Below is a list of Makes and Models it should work. I created this Web App with the help of Antigravity using Gemini Pro 3 and Claude Opus. I was fed up with the BrightEMS app logging me out all the time and if I was somewhere without Internet I wouldn't be able to easily control it or see the stats. Good luck. On the app, please go into diagnostics and click Copy JSON, and paste it into the Github Repo Issues, I'm interested in see other users diagnostic data to work out some extra mappings. User interface bottom right on the stats page takes you to diag.

FOSSiBOT F3600 Pro, FOSSiBOT F2400 SYDPOWER N052, SYDPOWER N066 AFERIY P210, AFERIY P310 ABOK Power Ark3600 (Probalby works, but not tested)

🚀 Launch Web App

📱 Interface Guide

Area	Icon / Label	Function
Top Bar	Not connected / Connected	Connection status: Always shows whether you are connected, and to which power station. Tap it to connect or disconnect.
Top Left	⚙️ (Gear)	Settings: Open configuration menu (Charge limits, Timers, Theme).
Top Right	⚡ (Bluetooth)	Connect/Disconnect: Toggle connection to the device.
Center	Ring Chart	Battery Level: Visual and percentage SOC. Color changes with level.
Center	-- W	Power Flow: Input (Left) and Output (Right) wattage.
Bottom	-- hrs	Time Remaining: Shows "Time to Empty" 🔋 or "Time to Full" ⚡ while charging.
Bottom Left	📖 (Book)	Device Info: System Summary and status flags.
Bottom Right	🔧 (Wrench)	Diagnostics: Advanced debugging, register inspector, and JSON import/export.
Below the chart	🤖 Press	SwitchBot Power Button: Tells a paired SwitchBot Bot to push the station's physical power button — the only way to switch a powered-off unit back on. See setup.

✨ Comprehensive Features

⚡ Real-Time Telemetry & Monitoring

Switchable Dashboard Layouts: Pick the dashboard that suits you in Settings → Theme & Layout: Classic, Energy Flow (animated power-flow diagram with tappable output nodes), Gauges (cockpit-style radial dials), or Pro Monitor (data-dense table with a full-size chart on top).
Smart Time Estimates: Automatically switches between "Time to Full" (⚡) when charging and "Time to Empty" (🔋) when discharging.
Live Power Flow: Visualize real-time Input (Charging) and Output (Discharging) wattage with dynamic gauges.
System Health & Active Fan Monitoring: Monitor system voltage, frequency, and real-time active cooling fan speed levels (0–5) with an animated spinning fan indicator on the dashboard whenever fans are active.
Flashing Visual Fault Alerts: Prominent pulsing red/amber fault warning banner that immediately flashes in the UI when an issue occurs on the device (Error 78 Inverter Trip, Error 79 Critical Hardware Safety Lockout, or Thermal Extreme Protection).
Thermal Protection Detection: Decodes internal environmental protection states: sub-zero cold freeze charging lockout (<0°C via Reg 21 code 15) and high-heat inverter safety pause (>55°C via Reg 8 code 79 with Reg 42 hardware mask = 0).
Battery Extensions: Support for monitoring external battery packs (Success/Extension batteries) with individual charge levels.
Power History Chart: Live graph of Input/Output wattage and battery % on the dashboard, with optional Fan level and AC input voltage series when active. Selectable time ranges (5m / 10m / 30m / 1h / 24h), tap the graph to read exact values at any point, and one-click CSV export.
Persistent History: Chart samples are stored locally (IndexedDB) so the last 24 hours survive page reloads and reconnects.
Daily Energy Totals: Charged/discharged energy (Wh / kWh) is tracked per day under the chart, with an optional cost estimate if you enter your electricity tariff in Settings → App Data.
Session Stats: Average and peak output plus peak input for the current connection, shown under the chart.
OLED Saver Theme: Pure-black theme that switches OLED pixels off — the most power-efficient way to leave the dashboard on overnight with "Keep Screen Awake".
Saved Devices & One-Tap Reconnect: Devices you have paired once appear in Settings → My Devices — reconnect without the browser chooser, rename or forget them, and optionally auto-connect when the app opens (Chrome/Edge).
Guided First Connection: A status bar at the top of the dashboard always says whether you are connected and to what. Until you are, the dashboard is replaced by a short walkthrough — switch the station on, turn Bluetooth on, tap Connect — and after the first pairing that becomes a single Connect to <your station> button. Failures are explained in plain English with the next thing to try, instead of leaving the screen full of dashes.
Auto-Reconnect: Automatically retries the Bluetooth connection (with backoff) if the link drops unexpectedly.
Keep Screen Awake: Optional Wake Lock so your phone screen stays on while monitoring.
Alerts: Optional browser notifications for low battery (configurable threshold), device faults, charge complete, AC input loss (UPS use), and output overload.
Adjustable Poll Rate: Choose how often the app reads device status (1–10 s).
Settings Backup: Export/import all app preferences (themes, alerts, custom appliances, energy totals) as JSON from Settings → App Data.

🔋 Power Simulator

Runtime Calculator: Estimate how long your power station will run with selected appliances.
Split AC/DC Lists: Clearly organized appliance management with separate AC and DC columns.
Editable Wattages: Click any appliance wattage to customize its power draw.
Efficiency Modeling: Card-based AC (88%) and DC (96%) efficiency toggles to account for real-world conversion losses.
Custom Appliances: Add your own devices with custom names, wattages, and AC/DC type — saved across sessions and removable.

🛠️ Advanced Control Dashboard

Power Toggle: Remotely toggle AC Inverter, DC (12V) Output, and USB Ports.
LED Light Control: Switch between Light modes: Off, Low, High, SOS, and Flash.
Silent Charging Mode: Toggle "Silent Charging" to reduce fan noise max charging speed for overnight use.

🤖 SwitchBot Power Button (Remote Power-On)

Wake a powered-off station: When the station is off its Bluetooth is off too, so no app can switch it on remotely. Stick a SwitchBot Bot (button-pusher) over the physical power button and the Press button at the bottom of the dashboard makes it press the button for you.
One-tap pairing: The first tap opens the browser's Bluetooth chooser filtered to SwitchBot devices (the Bot usually advertises as "WoHand"; on Android and Windows the chooser also shows the MAC address so you can pick the right one). Browsers cannot pre-select a device by MAC address, so this first pick is always manual — after that the Bot is remembered and Press fires immediately.
Password support: If the Bot has a password set in the SwitchBot app you are asked for it once; only the CRC32 checksum the protocol needs is stored locally, never the password itself.
Hands-free recovery: After a successful press the app waits 5 seconds for the station to boot, then starts the normal auto-connect so the dashboard comes straight back up.
Clear failure reasons: The panel reports exactly what the Bot said back — busy, low battery, wrong password — instead of failing silently, and the ✕ button forgets the Bot if you move it to another device.
Works with the original Bot and the 2026 rechargeable USB-C Bot — both speak the same BLE protocol. Full setup walkthrough below.

⚙️ Power Management Settings (F2400 / Classic V0 Platform)

The web application is tailored for the Classic V0 Platform (Fossibot F2400, F3600 Pro, Aferiy P210/P310, SYDPOWER N052/N066) communicating via Modbus BLE (0x1103 Settings / 0x1104 Status):

Platform Identifier Badge: Active profile banner clearly identifying the Classic V0 Modbus protocol.
Key Sound / Buzzer Tone: Remotely toggle button confirmation beep (Reg 56).
AC Output Frequency: Switch inverter output between 50 Hz and 60 Hz (Reg 16: 500 = 50Hz, 600 = 60Hz).
Charging Rate: Adjust AC Charging power from 300W to 1100W+ across 5 selectable levels (Reg 13).
Max Charging Current: Select maximum charging current ceiling in Amps (Reg 20, 3A–20A).
Discharge Limit: Set a lower DOD limit for battery discharge (e.g., stop discharging at 10%) to preserve battery health (Reg 66).
EPS / UPS Settings: Configure Entry Power Supply (UPS mode) behavior and upper charge limits (Reg 67: 60%–100%).
Schedule Charge Delay: Schedule charge start countdown in minutes (Reg 63 write, Reg 57 live countdown, and one-click cancel).
Hardware & Sub-MCU Firmware Inspector: Real-time decoding of AC Inverter, BMS, Solar MPPT, and Front Display Panel MCU firmware versions (Regs 47–50), maximum AC wattage ceiling (Reg 14), and regional hardware model IDs (Reg 11).
Standby Timers: detailed control over auto-shutdown timers to save power:
- Screen Timeout: (Reg 62) 1 min, 3 min, 5 min, 10 min, 30 min, 1 hr, 2 hr, 4 hr, Never.
- System Idle Shutdown (Whole Device): Auto-shutdown the entire device after inactivity (Reg 68: 5 min – 8 hr). ⚠️ "Never" / 0 is not supported and has been confirmed to permanently brick devices — the option is removed and writes of 0 to register 68 are blocked at the protocol layer.
- AC Standby: Turn off inverter if no load detected (Reg 60: 1 hr, 8 hr, 16 hr, 24 hr, Never).
- DC Standby: Turn off 12V DC ports if idle (Reg 61: 1 hr, 8 hr, 16 hr, 24 hr, Never).
- USB Standby: Turn off USB ports if idle (Reg 59: 5 min, 10 min, 30 min, 1 hr, 2 hr, 8 hr, 10 hr, Never).
Factory Reset / Unbind: Safely reset station parameters to defaults and unbind via Reg 0 with confirmation dialog.

🔍 Advanced Diagnostics & Reverse Engineering

Auto-Refresh: Live status updates every 2-10 seconds for real-time debugging.
Multi-Device Comparison: Import JSON diagnostic files from other users to compare specifications, firmware settings, and calibration data side-by-side.
Change Recorder: Capture a baseline and automatically detect register changes after performing physical actions on the device (reverse engineering helper).
Register Inspector: View raw BMS data streams (0x1104 Status vs 0x1103 Settings).
Safety Status Card & Fault Matrix: Real-time health banner showing active safety states and complete reference table for Error Codes 78, 79, 136, hardware fault masks, and DC-DC protection flags.
System Summary: Get a plain-English status report of the device state.
Visualization: "Flash" indicators show exactly which data points are changing in real-time.
Hide Zeros: Filter out unused registers to focus on active data.

🎨 Customization & Themes

Personalize your control panel with built-in themes:

☢️ Pipboy: Fallout-inspired retro CRT green.
🏭 Industrial: Clean, high-contrast, professional amber/slate look.
🌃 Cyberpunk: Neon magenta and cyan on dark purple.
🌊 Ocean: Calming teal and deep blue tones. (Default)
🌅 Sunset: Warm gradients of violet, orange, and gold.
☀️ Daylight: Pleasant light mode with soft whites and muted blues.
🖥️ Terminal: Minimalist retro command prompt style.
🌈 Rainbow: High-visibility vibrant colors.

📱 detailed Installation Guide

This app uses Web Bluetooth API, which means it runs entirely in your browser but can talk to hardware devices.

Platform Support

Platform	Browser	Status	Notes
Android	Chrome / Edge	✅ Fully Supported	Best experience. Supports PWA install.
Windows / Mac / Linux	Chrome / Edge	✅ Fully Supported	Requires Bluetooth hardware on PC.
iOS / iPadOS	Bluefy Browser	⚠️ Restricted	Safari does NOT support Web Bluetooth. You must download Bluefy from the App Store.

How to Install (PWA)

For the best experience (fullscreen, offline access), install the app:

Open the App: Navigate to dandwhelan.github.io/fossibot-bluetooth/
Pair: Click the blue Connect button top-right. Select your device (usually named "Fossibot..." or similar) from the list.
Install:
- Chrome (Desktop): Click the "Install" icon in the address bar (right side).
- Chrome (Android): Tap the menu (⋮) -> "Add to Home Screen" or "Install App".
- Bluefy (iOS): Bookmark the page.

🤖 SwitchBot Power Button Setup (Remote Power-On)

The problem: when a power station is switched off, its Bluetooth radio is off too. No app — this one, BrightEMS, or anything else — can wake it over the air. Somebody has to physically press the power button.

The fix: a SwitchBot Bot is a small battery-powered arm that presses a button on command over Bluetooth. Stick one over the station's power button and the app can press it for you from anywhere the Bot is in Bluetooth range.

What you need

A SwitchBot Bot — the original or the 2026 rechargeable USB-C model. Both use the same BLE protocol.
The Bot stuck over your station's power button (double-sided pad included in the box). Leave it in Press mode, not Switch mode.
Chrome / Edge on Android, Windows, Mac or Linux, or Bluefy on iOS — same Web Bluetooth support as the rest of the app.
You do not need the SwitchBot app, a SwitchBot Hub, a cloud account or an API token. The app talks to the Bot directly over BLE.

Steps

Open the app and scroll to the SwitchBot Power Button panel at the bottom of the dashboard.
Tap Press. The browser's Bluetooth chooser opens, filtered to SwitchBot devices — Bots usually advertise as "WoHand". On Android and Windows the chooser shows the MAC address printed inside the Bot's battery cover, so you can tell several Bots apart.
Pick your Bot. It is remembered from then on: later taps of Press fire immediately without the chooser.
If the Bot has a password set in the SwitchBot app you are prompted for it once. Only the CRC32 checksum the protocol needs is saved on your device — the password itself is never stored.
On a successful press the app waits 5 seconds for the station to boot, then auto-connects and the dashboard comes back up on its own.

Tap the ✕ next to Press to forget the Bot (for example if you move it to a different device); the stored password checksum is cleared with it.

Troubleshooting

Symptom	What it means
Chooser is empty	Browser permission problem, not the Bot. Grant Nearby devices (Android 12+) or Location and try again. Tap Press a second time to re-scan without the SwitchBot name filter.
"the Bot is busy"	A press is already running. Wait a couple of seconds and tap again.
"the Bot battery is too low"	Change the CR2 cell (or charge the USB-C model). Bots refuse to actuate on a flat battery.
"wrong password"	The saved checksum is dropped automatically — tap Press again and re-enter the password from the SwitchBot app.
"No response from the Bot"	The command was sent but no reply arrived within 5 s. The press may still have happened — check the station.
Press works, station stays off	The arm is not lined up on the button, or the press is too short for a station that needs a long press. Reposition the Bot, or use the SwitchBot app to set a longer press duration.

Protocol details are in PROTOCOL.md § 8.

🔄 Battery Factory Reset

If you want to remove your battery's Wi-Fi connection to the cloud (or recover after sending bogus credentials with the "Disable WiFi Access Point" button), you can factory-reset the battery. Press and hold the DC, Light, and USB buttons simultaneously for about 5 seconds. You will hear a beep when the reset completes.

🔧 Technical Protocol Documentation

For developers interested in the underlying communications or building their own integrations (Home Assistant, ESP32, etc.).

Bluetooth Service UUIDs

Main Service: 0000a002-0000-1000-8000-00805f9b34fb
Write Characteristic: 0000c304-0000-1000-8000-00805f9b34fb (Send commands)
Notify Characteristic: 0000c305-0000-1000-8000-00805f9b34fb (Receive data)

Data Packets

The device uses a custom binary protocol wrapped in BLE GATT.

1. Status Packet (`0x1104`)

Received automatically via Notify (UUID ...C305). Contains read-only telemetry.

Structure: [Header 0x11 0x04] [Data ~170b] [CRC] or simply raw Modbus-like register dump.
Key Registers:
- Reg 20: Total Output Watts
- Reg 21: System Idle Load (~10W units)
- Reg 56: Main Battery SOC (0-1000, scale 10)
- Reg 58: Time to Full (minutes)
- Reg 59: Time to Empty (minutes)

2. Settings Packet (`0x1103`)

Received upon request or when settings change.

Key Registers:
- Reg 13: Charge Power Level
- Reg 27: LED Light State
- Reg 57: Silent Charging Toggle

Writing Commands

Commands are sent to the Write Characteristic using a specific structure: [Header 0x11] [Cmd 0x??] [Reg High] [Reg Low] [Val High] [Val Low] [CRC]

SwitchBot Bot (power button pusher)

A separate BLE connection, unrelated to the power station's command queue.

Service: cba20d00-224d-11e6-9fb8-0002a5d5c51b
Write: cba20002-... · Notify: cba20003-...
Press: 57 01 00, or 57 11 <crc32 of password> 00 when the Bot has a password.
Reply (first byte): 01 OK · 02 error · 03 busy · 06 low battery · 07 password required · 09 wrong password.

This is SwitchBot's own published protocol (OpenWonderLabs/SwitchBotAPI-BLE), not reverse-engineered here.

See PROTOCOL.md for the complete reverse-engineered register map and packet structure details.

☀️ Next-Gen V1 Platform & Balcony Solar Findings

APK reverse-engineering of the manufacturer app revealed that newer hardware revisions and Balcony Solar products utilize a modernized protocol dubbed V1 Platform (portable-power-station-v1, balcony-pv, and switch-box device families, internally identified by protocol_version >= 1 and the unified se register architecture):

Unified Register Layout (se): Rather than scattering configuration across arbitrary high-numbered registers, the V1 platform condenses standby and power limits into lower contiguous holding registers:
- Reg 24: AC Inverter Standby Sleep Timer (replaces V0 Reg 60)
- Reg 25: LCD Screen Dim Timer (replaces V0 Reg 62)
- Reg 26: Minimum Discharge Limit (DOD %) (replaces V0 Reg 66)
- Reg 27: UPS Maximum Charge SOC Limit (%) (replaces V0 Reg 67)
- Reg 28: Whole Machine Auto-Shutdown Timer (replaces V0 Reg 68)
- Reg 29: USB / QC / PD Sleep Timer (replaces V0 Reg 59)
- Reg 30: 12V DC Port Sleep Timer (replaces V0 Reg 61)
- Reg 86: Grid-Tie Export / Feedback Power Maximum (Watts)
System State Bitmask (OpCode 0x05 / Reg 75): Rapid single-packet toggling of 15 system states via bitfield flags:
- Bit 0: Solar Self-Consumption Mode
- Bit 1: Grid Feedback Pause
- Bit 3: AI Dynamic Energy Scheduling
- Bit 6: Silent Charging Mode
- Bit 7: Buzzer / Key Sound Enable
- Bit 9: Low-Voltage Solar PV Charge Enable
- Bit 10: Car Charging Enable
- Bit 11: Master DC / USB / LED / Wireless Power Enable
- Bit 13: High-Voltage Solar PV Charge Enable
- Bit 14: Remote App Shutdown
Balcony Solar & Energy Metering:
- 32-bit Lifetime Solar Generation Wh counters (Reg 59 High Word, Reg 60 Low Word) and Daily Solar Wh (Reg 61).
- Built-in RTC synchronization (Regs 97–99: Year/Month, Day/Hour, Minute/Second).
- Micro-inverter grid feed-in coordination, smart socket integration, and grid export power limits.

Note: While the web app is optimized for the widely-deployed Classic V0 platform (F2400, F3600 Pro, Aferiy P210/P310), the complete V1 register definitions are fully mapped in PROTOCOL.md Section 9 for developers building Next-Gen drivers.

🚐 DC-DC Auxiliary Battery Charger Protocol (`wp`)

The manufacturer codebase also contains driver support for dual-battery vehicle/camper DC-DC chargers (DC_DC-V1-0083 profile, wp register architecture):

Live Alternator Telemetry (0x1104): Alternator input voltage, current, and wattage (Regs 0–2), auxiliary battery charge voltage, current, and wattage (Regs 3–5), and heatsink temperature (Reg 6).
Engine Protection: Hardware engine flameout detection and vibration cut-off protection (Reg 7 Bit 7 / Reg 13), and alternator cutoff voltage threshold (Reg 14).
Target Float / Bulk Voltage Setting: Adjustable auxiliary battery charge voltage profile (Reg 11).

See PROTOCOL.md Section 10 for complete register tables.

⚡ Smart Automatic Transfer Switch Box (`switch-box` / ATS)

The manufacturer ecosystem includes an automated transfer switch box (switch-box) for whole-home backup, RV sub-panel switching, and dynamic off-grid scheduling:

Operational Mode (Input Reg 4): Switches between 1 = Mains Mode (grid priority pass-through) and 2 = Smart Mode (dynamic automated off-grid scheduling).
Grid Transfer Status (Input Reg 12): Live state reporting 1 = ON GRID (mains active), 2 = OFF GRID (sub-panel isolated and powered by the portable power station), or 3 = FAULT.
Forced Off-Grid Control (Holding Reg 12): Remotely force the relay to disconnect from the electrical utility grid and run 100% off the portable power station battery.

See PROTOCOL.md Section 13 for full protocol details.

🤝 Contributing & Development

This project is open-source and depends on community investigation to map unknown registers for different models.

Clone the Repo: git clone https://github.com/dandwhelan/fossibot-bluetooth.git
Run Locally: Use a local server (e.g. VS Code Live Server) to serve index.html over HTTPS (or localhost). Note: Web Bluetooth requires a Secure Context (HTTPS or localhost).
Investigate: Use the built-in Diagnostics tab to find new registers.
Submit PR: Pull Requests are welcome! I've love people to find out what all the other settings and options do.

📄 License

MIT License. Free for personal and commercial use.

🧒 Explain it like I'm 5 years old

Here is how the Bluetooth data works in this app, using a Robot Restaurant analogy.

The Magic Bluetooth Restaurant 🍔🤖

Imagine the Fossibot is a very busy Robot Chef inside a magical kitchen. Your Phone is the Waiter.

1. Finding the Restaurant (The Connection)

Before anything can happen, the Waiter (your phone) needs to find the right restaurant.

The World: There are thousands of buildings (Bluetooth devices) nearby.
The Address (0xA002): The Waiter has a specific address written on a piece of paper. He ignores the Library and the Gym and goes straight to "Chef Bot's Kitchen (Address 0xA002)".

graph LR
    Phone["Your Phone<br>(The Waiter)"] -- Scans for 0xA002 --> Device["Fossibot<br>(The Kitchen)"]
    style Phone fill:#e0f2fe,stroke:#0284c7,stroke-width:2px
    style Device fill:#dcfce7,stroke:#16a34a,stroke-width:2px

2. The Serving Windows (Characteristics)

Once inside, the Waiter sees the Chef. But he can't just shout orders! There are two special windows to pass things through.

Window A: The "Order Here" Window (`0xC304`)

What it is: The IN window. Think of 0xC304 as the Mailbox Number painted on the wall.
The Ticket: The command 11 06... is the Letter you put inside.
- Note: You don't write "0xC304" on the letter itself. You just put the letter into the box marked "0xC304".
The Secret Language: The Waiter writes: 11 06 00 1B 00 01 ("Reg 27 On").

Window B: The "Pick Up" Window (`0xC305`)

What it is: The OUT window.
How it works: The Waiter stands here and waits. Every few seconds, the Chef slides a tray of food (Data) out.

graph LR
    Waiter["Waiter<br>(Your App)"] -- "Slides Ticket: 11 06..." --> WindowA["IN Window<br>(0xC304)"]
    WindowB["OUT Window<br>(0xC305)"] -- Slides Data Tray --> Waiter
    subgraph Kitchen [The Robot Kitchen]
        WindowA --> Chef(Robot Chef)
        Chef --> WindowB
    end
    style WindowA fill:#fce7f3,stroke:#db2777,stroke-width:2px
    style WindowB fill:#dbeafe,stroke:#2563eb,stroke-width:2px

3. The Problem: The Kitchen Traffic Jam 🚦💥

Before we fixed the code, here is what was happening:

You pressed "Turn On Light" (11 06...). The Waiter ran to the IN Window.
At the exact same time, the App wanted to ask "What is the Settings?" (11 03...). A second Waiter ran to the IN Window.
Use your imagination: Two waiters tried to shove two order tickets through the tiny slot at the exact same moment!
The Result: They bumped heads. The tickets fell on the floor. The Chef got confused and yelled "GATT ERROR!" (which is robot for "Get Out!").

sequenceDiagram
    participant Waiter1 as Waiter (Light Button)
    participant Waiter2 as Waiter (Settings Check)
    participant Slot as IN Window (0xC304)
    
    Waiter1->>Slot: Shoves "11 06..." Ticket
    Waiter2->>Slot: Shoves "11 03..." Ticket
    Note over Slot: 💥 CRASH! Both stuck!
    Slot-->>Waiter1: Error!
    Slot-->>Waiter2: Error!

4. The Solution: The Ticket Line (Command Queue) 🎫🚶‍♂️🚶‍♀️

We built a nice velvet rope line (a Queue) in front of the IN Window.

Waiter 1 arrives with "Turn On Light". The rope creates a barrier. He goes first.
Waiter 2 arrives with "Get Settings". He sees Waiter 1 is busy, so he waits in line.
Waiter 1 slides his ticket (11 06...). Success! ✅
Waiter 1 leaves. The Chef takes a breath (500 milliseconds).
Waiter 2 steps up and slides his ticket (11 03...). Success! ✅

Now, everyone gets their turn, the Chef is happy, and the "GATT Error" is gone forever!

graph LR
    W1(Waiter 1<br>Light On)
    W2(Waiter 2<br>Settings)
    Queue[The Line<br>Command Queue]
    Slot(IN Window<br>0xC304)
    Chef(Robot Chef)

    W1 --> Queue
    W2 --> Queue
    Queue -- One at a time! --> Slot
    Slot --> Chef

    style Queue fill:#fef08a,stroke:#ca8a04,stroke-width:2px,stroke-dasharray: 5 5

Name		Name	Last commit message	Last commit date
.github/workflows		.github/workflows
img		img
test		test
CLAUDE.md		CLAUDE.md
GEMINI.md		GEMINI.md
PROTOCOL.md		PROTOCOL.md
README.md		README.md
icon-512.png		icon-512.png
index.html		index.html
manifest.json		manifest.json
service-worker.js		service-worker.js
task.md		task.md

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