1. Basic Information

1.1 UUID

Type	UUID
Service	8FE4E987-0824-8B2C-2E59-22C7287395C3
Host to Device	8FE4E988-0824-8B2C-2E59-22C7287395C3
Device to Host	8FE4E989-0824-8B2C-2E59-22C7287395C3

1.2 MAC Address

First 24 bits are fixed: 50:C0:F0
Last 24 bits are random

1.3 Advertising Packet

Type	Data	Description
0x01	0x06	Advertising flag
0x09	C01	Device name
0x02	16-bit UUID	First two bytes of the 128-bit UUID: `8FE4`
0xFF	MAC	Device MAC address

1.4 About iOS

After pairing with the iOS system, due to the presence of the ANCS protocol, iOS will maintain the BLE central connection even after the app is closed and removed from the background.

1.5 About the Bike Computer

To be compatible with the bike computer, the data sent from the device to the app must not exceed 17 bytes per transmission. If the data exceeds this limit, it will be split into multiple packets.

2. Protocol Format

2.1 Protocol Structure

Protocol ID	Version	Command	CRC	Data Length	Data
2 bytes	1 byte	1 byte	2 bytes	2 bytes	N bytes

Multi-byte data uses big-endian format.
Protocol ID = Fixed value: E987
Protocol Version = Current version: 0x04
Command = Refer to section 3. Protocol Commands
CRC = CRC-16-IBM of the “Data” field
Data Length = Byte length of the “Data” field
Data = Actual data content

//crc
unsigned short crc_IBM(unsigned char *ptr, int len)
{
    unsigned int i;
    unsigned short crc = 0x0000;

    while(len--)
    {
        crc ^= *ptr++;
        for (i = 0; i < 8; ++i)
        {
            if (crc & 1)
                crc = (crc >> 1) ^ 0xA001;
            else
                crc = (crc >> 1);
        }
    }
    return crc;
}

Example

Function: Get all device info 0xe98703000000000100

Protocol ID: 0xe9, 0x87 (2 bytes) Version: 0x03 (1 byte) Command: 0x00 (1 byte) [Get device info] CRC: 0x00, 0x00 (2 bytes) Data Length: 0x00, 0x01 (2 bytes) Data: 0x00 (1 byte) [0x00 = all info]

2.2 Protocol Version Conflict

0x00010x0105

These two commands must not be modified.
When a protocol version mismatch is detected, only these two commands are allowed to be used to prompt firmware upgrade.

3. Protocol Commands

🟩 Green highlights indicate repeatable data.

🔵 Blue highlights indicate repeat count.

0x00 Get Device Info

The host sends a request with a specific type, and the device replies with the corresponding information. If the device info changes, the device will proactively send updates.

Host Sends:

Length	Value	Description
1 byte	`0x00`	All information
1 byte	`0x01`	Version info
1 byte	`0x02`	Battery info
1 byte	`0x03`	Brightness info
1 byte	`0x04`	Volume info
1 byte	`0x05`	Device SN
1 byte	`0x06`	Display status

Device Replies:

0x00 All Information

The device will sequentially send all types of data listed above.

0x01 Version Info (Fixed, cannot be modified)

Length	Value	Description
1 byte	`0x01`	Version info
1 byte	`0~255`	Major version
1 byte	`0~255`	Minor version
1 byte	`0~255`	Patch version
1 byte	`00~99`	Compile year
1 byte	`01~12`	Compile month
1 byte	`01~31`	Compile day

Data Example: 0xe9870300b6f600070100012619031c  
Packet Header:  
0xe9, 0x87 (2 bytes), 0x03 (1 byte), 0x00 (1 byte), 0xb6, 0xf6 (2 bytes), 0x00, 0x07 (1 byte)  
Data: 0x01 00 01 26 19 03 1C  【0x01 corresponds to version information】  
Converted to decimal:  
0 (first version number)  
1 (second version number)  
38 (third version number)  
25 (year)  
3 (month)  
28 (day)

0x02 Battery Information

Length	Value	Description
1 byte	`0x02`	Battery Information
1 byte	`1~100`	Battery Percentage (%)
1 byte	`0X00` /`0X01`	Discharging/Charging

0x03 Brightness Information

Length	Value	Description
1 byte	`0x03`	Brightness Information
1 byte	`1~100`	Brightness Level (%)

0x04 Volume Information

(Volume changes made on the phone system are sent back to the app)

(Note: On iOS, volume can be obtained via AMS if AVRCP is not available)

Length	Value	Description
1 byte	`0x04`	Volume Information
1 byte	`1~100`	Volume Level (%)

0x05 Device Serial Number (SN) (Fixed, cannot be modified)

Length	Value	Description
1 byte	`0x05`	Device SN Identifier
14 bytes	ASCII	Serial Number String

0x06 Display Status

Bits are interpreted from least significant bit (LSB) to most significant bit (MSB)

Bit	Value	Description
1 bit	`0x00`	Music Hidden
	`0x01`	Music Shown
1 bit	`0x00`	Incoming Call Hidden
	`0x01`	Incoming Call Shown
1 bit	`0x00`	Message Hidden
	`0x01`	Message Shown
1 bit	`0x00`	Left Dashboard Hidden
	`0x01`	Left Dashboard Shown
1 bit	`0x00`	Right Dashboard Hidden
	`0x01`	Right Dashboard Shown
3 bits	—	Reserved

0x07 Get UI Mode

Retrieves the current UI display mode of the device.

Length	Value	Description
1 byte	`0x07`	Get UI Mode Command
1 byte	`0x00`	Mode 1 (Standard)
	`0x01`	Mode 2 (Dashboard Mode)
	`0x02`	Mode 3 (Focus Mode)

0x08 Get Screen Sleep Timeout

Retrieves the screen sleep timeout duration. If the value is less than or equal to 5 seconds, the screen will be treated as "always on" (no timeout).

Length	Value	Description
1 byte	`0x08`	Get Screen Sleep Timeout Command
2 bytes	`0~65535`	Timeout duration in seconds

0x09 Get Activation Status

Length	Value	Description
1 byte	`0x09`	Get Activation Status Cmd
1 byte	`0x00`/`0x01`	Not Activated/Activated

0x0A Get Accessory Binding

Retrieves accessory binding information.

Length	Value	Description
1 byte	`0x0A`	Get Accessory Binding Cmd
1 byte	`0x01`	Helmet Device
4 bytes	`0x00000000`~`FFFFFFFF`	Group ID (0 = Not Bound)

0x0B Get Unit System (Metric/Imperial)

Retrieves the current unit system setting.

Length	Value	Description
1 byte	`0x0B`	Get Unit System Cmd
1 byte	`0x00` /`0x01`	Metric System/Imperial System

0x01 Set Device Info

The host sends corresponding information to synchronize with the device.

0x00 Set Volume

Length	Value	Description
1 byte	`0x00`	Volume Command
1 byte	`0~100`	Volume Level (%)

0x01 Set Brightness

Length	Value	Description
1 byte	`0x01`	Brightness Command
1 byte	`1~100`	Brightness Level (%)

0x02 Sync Time to Device

Length	Value	Description
1 byte	`0x02`	Time Command
8 bytes	Timestamp	Unix Timestamp

0x03 Factory Reset

Length	Value	Description
1 byte	`0x03`	Factory Reset

0x04 Set Display Status

Sets the visibility of various UI elements.

Bits are interpreted from least significant bit (LSB) to most significant bit (MSB).

Bit	Value	Description
1 bit	`0x00`	Music Hidden
	`0x01`	Music Shown
1 bit	`0x00`	Incoming Call Hidden
	`0x01`	Incoming Call Shown
1 bit	`0x00`	Message Hidden
	`0x01`	Message Shown
1 bit	`0x00`	Left Gauge Hidden
	`0x01`	Left Gauge Shown
1 bit	`0x00`	Right Gauge Hidden
	`0x01`	Right Gauge Shown
3 bits	—	Reserved

0x05 Enter ADFU Mode

Enters firmware upgrade (ADFU) mode.

This command is fixed and must not be modified.

Length	Value	Description
1 byte	`0x05`	Enter ADFU Mode Command

0x06 Switch UI Mode

Switches the device's UI display mode.

Length	Value	Description
1 byte	`0x06`	Switch UI Mode Command
1 byte	`0x00`	Mode 1 (Default)
	`0x01`	Mode 2 (Gauge Mode)
	`0x02`	Mode 3 (Minimal Mode)

0x02 Activity Data

The host sends activity-related data. Data is sent field by field. If the value is 0xFFFFFFFF or the device is disconnected, display --. If the field name or value is empty, it will not be displayed. After switching via remote control, the corresponding field data will be sent.

Length	Value	Description
1 byte	`0x00`	Empty (not displayed)
1 byte	`~~0x01~~`	Duration (deprecated)
1 byte	`0x02`	Distance
1 byte	`0x03`	Speed
1 byte	`0x04`	Cadence
1 byte	`0x05`	Heart Rate
1 byte	`0x06`	Power
1 byte	`0x07`	Altitude & Climb
1 byte	`0x08`	Calories Burned
1 byte	`0x09`	Slope
1 byte	`0x0A`	Incline
1 byte	`0x0B`	Acceleration
1 byte	`0x0C`	Heading

0x00 Activity Field Value

Sends the value of a specific activity field. If the field value is 0xFF or empty, it will not be displayed.

Because of processing speed constraints, continuous updates are limited to intervals of 500 milliseconds or more.

Length	Value	Description
1 byte	`0x00`	Activity Field Value Cmd
1 byte	`0~10` /`0xFF`	Length of field value (N)
0~10 bytes	—	Field value (string)
...N*4	—	Repeated N*4 if needed

0x06 Switch Field

Switches the displayed field and its unit/value. If a field name or unit is not available, set its length to 0xFF or 0x00 .

Because of processing speed constraints, continuous updates are limited to intervals of 1000 milliseconds or more.

Length	Value	Description
1 byte	`0x06`	Switch Field Command
1 byte	`0~25` / `0xFF`	Field name length (N)
0~25 bytes	—	Field name (string)
1 byte	`0~10` / `0xFF`	Field unit length (U)
0~10 bytes	—	Field unit (string)
1 byte	`0~10` / `0xFF`	Field value length (V)
0~10 bytes	—	Field value (string)
...N*4	—	Repeated N*4 if needed

Data Transmission Example
<E9 87 03 02 E0 E0 00 2E 06 04 44 69 73 74 02 4B 6D 00 03 53 50 44 04 6B 6D 2F 68 00 04 47 52 41 44 01 25 00 0B 4C 41 50 20 41 56 47 20 53 50 44 04 6B 6D 2F 68 00>

Corresponding content (in order):

First field:
Field Name: Dist
Unit: Km
Value: -- (value length is 0, so not displayed)
Second field:
Field Name: SPD
Unit: km/h
Value: -- (value length is 0)
Third field:
Field Name: GRAD
Unit: %
Value: -- (value length is 0)
Fourth field:
Field Name: LAP AVG SPD
Unit: km/h
Value: -- (value length is 0)
Notes:

All data is converted from string to byte, including field values.
For example, if the original field value is of type int, it must first be converted to a string, and then to bytes before transmission.

0x01 Activity Goal Achieved Data (Popup Goal Data)

When an activity goal is achieved, this command is used to send a popup message to the device.

Length	Value	Description
1 byte	`0x01`	Activity Goal Achieved Cmd
1 byte	N	Length of the content
N bytes	—	Goal achievement content

0x02 Activity Dashboard Field Data

Sends data for the left and right dashboard fields during an activity. Field types refer to the field mapping table.

Length	Value	Description
1 byte	`0x02`	Dashboard Field Command
1 byte	Field ID	Left Dashboard Field ID
4-Byte Float (IEEE 754 Standard)	Field Value	Left Field Value
1 byte	Field ID	Right Dashboard Field ID
4-Byte Float (IEEE 754 Standard)	Field Value	Right Field Value

0x03 Activity Field Average Value Update

Sends the status of average value changes for activity fields. When this command is sent, the corresponding status will be displayed temporarily, then automatically hidden.

Length	Value	Description
1 byte	`0x03`	Average Value Update Command
1 byte	0 / 1 / 2	Variable Field 1 Status (None/Up/Down)
1 byte	0 / 1 / 2	Variable Field 2 Status
1 byte	0 / 1 / 2	Variable Field 3 Status
1 byte	0 / 1 / 2	Variable Field 4 Status
1 byte	0 / 1 / 2	Dashboard Field 1 Status
1 byte	0 / 1 / 2	Dashboard Field 2 Status

0: No change
1: Value increased
2: Value decreased

0x04 Activity Progress

Sends the current progress of the activity as a percentage.

Length	Value	Description
1 byte	`0x04`	Activity Progress Command
1 byte	0~100	Progress Percentage (%)

0x05 Activity Time

Sends the current activity status and elapsed time. The time is synchronized every 30 seconds or when the status changes.

Length	Value	Description
1 byte	`0x05`	Activity Time Command
1 byte	`0x00`	Activity Ended
	`0x01`	Activity Started
	`0x02`	Activity Paused
4 bytes	Time (s)	Elapsed Time in Seconds

0x03 AI Data

The host sends AI-related status and data.

When the status changes, only 1 byte is sent.

When transmitting AI content, status 0x04 is used, followed by data type and content.

Fast mode is used for auto-start AI scenarios, and the display will remain visible.

0x00 / 0x05 AI Start (Normal / Fast)

Length	Value	Description
1 byte	`0x00` / `0x05`	Enter AI Listening Mode

0x01 / 0x06 AI End (Normal / Fast)

Length	Value	Description
1 byte	`0x01` / `0x06`	Exit AI Mode

0x02 / 0x07 Start Voice Capture (Normal / Fast)

Length	Value	Description
1 byte	`0x02` / `0x07`	Start Capturing Voice Input

0x03 / 0x08 Load Answer (Normal / Fast)

Length	Value	Description
1 byte	`0x03` / `0x08`	Load Answer State

0x04 / 0x09 Display Content (Normal / Fast)

If no correction is needed, send only the new text to append. If correction is needed, send the full updated text.

Length	Value	Description
1 byte	`0x04` / `0x09`	Display Answer Content
1 byte	`0x00`	Question Content (deprecated)
	`0x01`	End of Question (deprecated)
	`0x02`	Answer Content
	`0x03`	End of Answer
2 bytes	N	Data Length
N bytes	—	Text Data (UTF-8)

0x0A AI Reminder (Button Triggered) 0x0B (Auto Triggered)

AI Reminder Data

Length	Value	Description
1 byte	0x0A / 0x0B	AI Reminder Command (Button/Auto)
1 byte	0~25 / 0xFF	Field Name Length (N)
0~25 bytes	—	Field Name (string)
1 byte	0~10 / 0xFF	Field Value Length (V)
0~10 bytes	—	Field Value (string)
1 byte	0 / 1 / 2	Average Value Status:
	0	No Change
	1	Increased
	2	Decreased

0x04 Accessory Status Sync

Synchronizes and displays the status of connected accessories.

0x00 Camera Status

Length	Value	Description
1 byte	`0x00`	Camera Status Command
1 byte	`0x00`	Camera Stopped
	`0x01`	Camera Started
	`0x02`	Camera Paused
2 bytes	—	Duration in minutes (reserved, not sent)

0x01 Remote Control Signal

Length	Value	Description
1 byte	`0x01`	Remote Control Command
1 byte	`0x01`	Turn Left Signal
	`0x02`	Turn Right Signal
	`0x03`	Brake Signal

0x02 Radar Signal

0xFF indicates no radar signal.

Length	Value	Description
1 byte	`0x02`	Radar Signal Command
8 bytes	`0~200` / `0xFF`	Distance of 8 radar points
8 bytes	—	Angle of 8 radar points
8 bytes	—	Speed of 8 radar points

0x03 Pair/Unpair Broadcast Accessory

After pairing starts, the device will scan for the first helmet's group ID and store it.

Subsequent pairing attempts will only match this stored group ID.

Pairing lasts for 1 minute.

If pairing is successful, the group ID will be returned.

A group ID of 0 indicates unbound

Length	Value	Description
1 byte	`0x03`	Pair/Unpair Accessory Command
1 byte	`0x01`	Helmet Device
1 byte	`0x00`/`0x01`	Unpair/Pair

0x05 Notification Data

Sends notification data to the device, which will display it as a popup.

This is only used on Android. iOS uses ANCS (Apple Notification Center Service) instead.

Length	Value	Description
2 bytes		App Name Length
N bytes		App Name (string)
2 bytes		Title Length
M bytes		Title (string)

0x06 Virtual Button

0x00 From App

Length	Value	Description
1 byte	0x00	Source: From App
1 byte	0x01	Left Button
	0x02	Right Button
	0x03	Power Button

0x01 From Device

Length	Value	Description
1 byte	0x01	Source: From Device
1 byte	0x01	Left Handlebar Pressed
	0x02	Left Handlebar Released
	0x03	Right Handlebar Pressed
	0x04	Right Handlebar Released

0x07 Contact Lookup

The app synchronizes the contact list to the phone.

When the device receives a phone number, it sends it back to the app for comparison.

The app then returns the corresponding contact name.

0x00 Device Requests Name

Length	Value	Description
1 byte	`0x00`	Device Requests Name
1 byte		Phone Number Length
N bytes		Phone Number (string)

0x01 App Returns Name

Length	Value	Description
1 byte	0x01	App Returns Name
1 byte		Contact Name Length (0 if empty)
N bytes		Contact Name (string)

0x08 Navigation Data

Navigation data is displayed within a 130×80 pixel area.

All coordinates are based on this display area using (x, y) values.

0x00 Navigation Start/End

Length	Value	Description
1 byte	`0x00`	Navigation Start/End Command
1 byte	`0x00`	Navigation End
	`0x01`	Navigation Start
1 byte	`N`	Total Number of Route Coordinates

0x01 Full Route Map

Length	Value	Description
1 byte	`0x01`	Full Route Map Command
2 bytes	`1~1024`	Number of Route Coordinates (N)
1 byte	`0~Width`	X Coordinate (per point)
1 byte	`0~Height`	Y Coordinate (per point)
...N*N	...N*N	...N*N

0x02 Route

If the number of passed coordinates equals the total route coordinates, it means the route is completed. The number will never exceed the full route count.

Length	Value	Description
1 byte	`0x02`	Passed Route Command
2 bytes	`1~1024`	Number of Passed Coordinates
1 byte	`0~Width`	Last Passed X Coordinate
1 byte	`0~Height`	Last Passed Y Coordinate

0x03 Route Info Text

Length	Value	Description
1 byte	`0x03`	Route Info Command
1 byte	`0~255`	Text Length (N)
N bytes	-	Info Text (UTF-8 string)

0x04 Navigation Position Text

Length	Value	Description
1 byte	`0x04`	Navigation Position Command
1 byte	`0~255`	Text Length (N)
N bytes	—	Position Text (UTF-8 string)

0x05 Navigation Info

Length	Value	Description
1 byte	`0x05`	Navigation Info Command
1 byte	`0~255`	Icon ID
1 byte	`0~255`	Text Length (N)
N bytes	—	Instruction Text (UTF-8 string)

Below is a list of all 87 PNG files under the light theme directory (src/png/light), along with their corresponding type, modifier, and Chinese meaning.

Each file name represents an icon name, with a unified prefix direction_ and suffix .png.

All PNG files have been packaged and attached at the bottom of this documentation.

No	Type	Modifier	PNG Name
2	arrive	left	direction_arrive_left.png
3	arrive	right	direction_arrive_right.png
4	arrive	straight	direction_arrive_straight.png
5	close	—	direction_close.png
7	continue	left	direction_continue_left.png
8	continue	right	direction_continue_right.png
9	continue	slight_left	direction_continue_slight_left.png
10	continue	slight_right	direction_continue_slight_right.png
11	continue	straight	direction_continue_straight.png
12	continue	uturn	direction_continue_uturn.png
14	depart	left	direction_depart_left.png
15	depart	right	direction_depart_right.png
16	depart	straight	direction_depart_straight.png
17	end_of_road	left	direction_end_of_road_left.png
18	end_of_road	right	direction_end_of_road_right.png
19	flag	—	direction_flag.png
20	fork	—	direction_fork.png
21	fork	left	direction_fork_left.png
22	fork	right	direction_fork_right.png
23	fork	slight_left	direction_fork_slight_left.png
24	fork	slight_right	direction_fork_slight_right.png
25	fork	straight	direction_fork_straight.png
26	invalid	—	direction_invalid.png
34	merge	right	direction_merge_right.png
35	merge	slight_left	direction_merge_slight_left.png
36	merge	slight_right	direction_merge_slight_right.png
40	new_name	sharp_left	direction_new_name_sharp_left.png
41	new_name	sharp_right	direction_new_name_sharp_right.png
45	notificaiton	sharp_right	direction_notificaiton_sharp_right.png
46	notification	left	direction_notification_left.png
47	notification	right	direction_notification_right.png
48	notification	sharp_left	direction_notification_sharp_left.png
49	notification	slight_left	direction_notification_slight_left.png
50	notification	slight_right	direction_notification_slight_right.png
51	notification	straight	direction_notification_straight.png
53	off_ramp	right	direction_off_ramp_right.png
54	off_ramp	slight_left	direction_off_ramp_slight_left.png
55	off_ramp	slight_right	direction_off_ramp_slight_right.png
56	on_ramp	left	direction_on_ramp_left.png
57	on_ramp	right	direction_on_ramp_right.png
58	on_ramp	sharp_left	direction_on_ramp_sharp_left.png
59	on_ramp	sharp_right	direction_on_ramp_sharp_right.png
60	on_ramp	slight_left	direction_on_ramp_slight_left.png
61	on_ramp	slight_right	direction_on_ramp_slight_right.png
62	on_ramp	straight	direction_on_ramp_straight.png
63	rotary	—	direction_rotary.png
64	rotary	left	direction_rotary_left.png
65	rotary	right	direction_rotary_right.png
66	rotary	sharp_left	direction_rotary_sharp_left.png
67	rotary	sharp_right	direction_rotary_sharp_right.png
68	rotary	slight_left	direction_rotary_slight_left.png
69	rotary	slight_right	direction_rotary_slight_right.png
70	rotary	straight	direction_rotary_straight.png
71	roundabout	—	direction_roundabout.png
72	roundabout	left	direction_roundabout_left.png
73	roundabout	right	direction_roundabout_right.png
87	uturn	—	direction_uturn.png

The naming convention and retrieval method can be found in the Mapbox directions-icons README. The meanings of type and modifier correspond to the enumerations defined in the Mapbox Directions SDK documentation.

0x09 Personalized Layout Adjustment

Used to customize the position of UI modules.

The full screen resolution is 640 × 480 pixels.

Module Definitions

Module ID	Name	Width	Height
`0x00`	Low Battery	188	24
`0x01`	Ride 1	114	46
`0x02`	Ride 2	114	46
`0x03`	Ride 3	114	46
`0x04`	Ride 4	114	46
`0x05`	Info Bar	100	45
`0x06`	Goal Achieved	400	38
`0x07`	Indicator Bar	24	272
`0x08`	Message	250	80
`0x09`	Direction Prompt	74	36
`0x0A`	Radar	22	220
`0x0B`	Phone	220	36
`0x0C`	AI	640	164
`0x0D`	Pause	27	27
`0x0E`	Track	150	120
`0x0F`	Navigation	266	100
`0x10`	Left Gauge	150	100
`0x11`	Right Gauge	150	100
`0xFF`	All Modules

0x00 Set Module Coordinates

Sets the position and visibility of UI modules for a specific UI mode. Multiple modules can be configured in a single command.

Length	Value	Description
1 byte	`0x00`	Set Module Coordinates Command
1 byte	`0x00`	Mode 1 (Standard Mode)
	`0x01`	Mode 2 (Dashboard Mode)
	`0x02`	Mode 3 (Focus Mode)
1 byte	`0~255`	Number of modules to configure
1 byte	`0x00~0xFE`	Module ID
1 byte	`0x00 / 0x01`	Visibility (0 = Hidden, 1 = Shown)
2 bytes	`0~640`	X Coordinate
2 bytes	`0~480`	Y Coordinate
...	`...`	Repeat for N modules

0x01 Get Module Coordinates

Length	Value	Description
1 byte	`0x01`	Get Module Coordinates Command
1 byte	`0x00`	Mode 1 (Standard Mode)
	`0x01`	Mode 2 (Dashboard Mode)
	`0x02`	Mode 3 (Focus Mode)
1 byte	`0x00~0xFF`	Module ID
1 byte	`0x00 / 0x01`	Visibility (0 = Hidden, 1 = Shown)
2 bytes	`0~640`	X Coordinate
2 bytes	`0~480`	Y Coordinate

0x02 Reset Layout

Resets the layout of a specific module or all modules to the default configuration for the selected UI mode.

Length	Value	Description
1 byte	`0x02`	Reset Layout Command
1 byte	`0x00`	Mode 1 (Standard Mode)
	`0x01`	Mode 2 (Dashboard Mode)
	`0x02`	Mode 3 (Focus Mode)
1 byte	`0x00~0xFE`	Module ID to reset

0xFF Test Command

This command is used for testing specific features. Some features may require specific firmware versions to function properly.

0x01 Debug Brightness

Length	Value	Description
1 byte	`0x01`	Debug Brightness Command
2 bytes	`0~60`	Current Adjustment (mA)
2 bytes	`0~7109`	Brightness Adjustment (level)

Navigation_PNG.zip