1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Mcezdy UART2 Electric Bike LCD Display Meter. This intelligent display is designed to enhance your ebike riding experience by providing essential information and control functions. Please read this manual thoroughly before use to ensure proper functionality and safety.
The Mcezdy UART2 LCD Display Meter is available in several models, including M5, M6C, and H6C, offering various form factors and connection types (SM or Waterproof) to suit different ebike setups. All models utilize the UART2 communication protocol.
2. Specifications
The Mcezdy UART2 LCD Display Meters offer a range of features and are compatible with various ebike configurations. Key specifications are detailed below:
Common Features:
- Communication Method: UART 2 Protocol
- Compatible Voltage: 24V / 36V / 48V / 60V
- USB Charging: 5V / 500mA
- Functions: Battery indicator, headlight control, boost function, assist levels, speed display, trip/total mileage, running time, metric/imperial conversion, fault indicator, walking mode, PAS levels, riding time, error warning.
Model-Specific Dimensions:
| Model | Dimensions (L x W x H) |
|---|---|
| H6C Bicycle Accessory | 71.3mm x 116.1mm x 22.8mm |
| M6C Cycling Speed Odometer | 98.1mm x 61.9mm x 24.6mm |
| M5 Cycling Speed Odometer | 93.4mm x 56.4mm x 9mm |
The display features a frosted aluminum alloy housing and a tough glass screen for durability.
3. Installation
3.1 Handlebar Mounting
The display is compatible with various handlebar sizes: 22.2mm, 25.4mm, 28.6mm, and 31.8mm. Choose the appropriate mounting bracket for your handlebar diameter and securely attach the display.
3.2 Wiring Connections
Ensure your ebike controller uses the UART2 communication protocol. The display connects to your controller via either an SM or Waterproof connection plug. Refer to the wiring diagram below for the standard 5-pin SM terminal interface. Match the wire colors to the corresponding functions on your controller.
- Red (D+): Power positive
- Blue (K): Controller communication line
- Black (GND): Ground
- Green (RX): Data reception
- Yellow (TX): Data transmission
Important: The display's compatibility depends on the controller's protocol. This display is designed for controllers using the UART2 protocol. If your controller uses a different protocol (e.g., Bafang, KDS), this display will not be compatible.
4. Operation
4.1 Power On/Off
Press and hold the power button to turn the display on or off.
4.2 Display Functions
The display provides real-time information about your ebike's performance:
- Energy Bar: Shows current battery level.
- Speed: Displays current riding speed (km/h or mph). The display can show speeds over 50 km/h if your controller supports it.
- PAS (Pedal Assist System) Level: Indicates the current assist level.
- ODO (Odometer): Total accumulated mileage.
- Trip: Current trip mileage.
- TM (Running Time): Current trip duration.
- Fault Indicator: Displays error codes if issues are detected.
- Headlight Control: Allows control of your ebike's headlights.
- Boost Function: Engages a temporary power boost.
- Walking Mode: Provides low-speed assistance for walking the bike.
4.3 Changing Speed Units (Metric/Imperial)
The display supports both kilometers per hour (km/h) and miles per hour (mph). The method for switching between these units is typically found within the display's settings menu. Consult your ebike's main controller manual or the display's advanced settings for specific instructions.
4.4 Adjusting Speed Limit (P08 Setting)
To change the speed limit:
- Long press the '+' and '-' keys simultaneously to enter the menu.
- Short press the power button to navigate to the P08 setting.
- Use the '+' key to set your desired speed limit.
- After adjusting, long press the '+' and '-' keys simultaneously to save the setting and exit the menu.
Note: The ability to lift the speed limit depends on whether the limitation is imposed by the display or the controller. If the controller has a hardwired speed limit, adjusting the display setting may not override it. A specially customized version may support a fast speed limit of 25 km/h, while the regular version does not.
5. Maintenance
- Keep the display clean using a soft, damp cloth. Avoid abrasive cleaners or solvents.
- Ensure all connections are secure and free from corrosion.
- Protect the display from extreme temperatures and direct prolonged sunlight when not in use.
- Regularly check for any physical damage to the housing or screen.
6. Troubleshooting
6.1 E10 Error Displayed
If the display shows an "E10" error after connection, there are two primary possibilities:
- Incompatible Communication Protocol: The communication protocol between your display and the ebike controller is incompatible. This display requires a controller that uses the UART2 protocol.
- Vehicle System Issues: The overall condition of your ebike's electrical system is poor. This could involve issues with the boost controller, throttle, or motor, leading to communication failure with the display.
Action: Verify your controller's protocol. If it is UART2, inspect other components of your ebike's electrical system for faults.
6.2 Display Not Powering On
- Check all power connections to ensure they are securely plugged in.
- Verify that your ebike's battery is charged and providing power.
- Inspect the wiring for any visible damage or breaks.
6.3 Incorrect Speed Readings
- Ensure the wheel circumference setting in the display's advanced menu is correctly configured for your ebike's wheel size.
- Check the speed sensor and its magnet for proper alignment and function.
7. User Tips
- Verify Controller Protocol: Before purchasing or installing, always confirm that your ebike's controller uses the UART2 protocol. This is crucial for compatibility. You can check your controller's manual, its appearance, or contact your controller's seller.
- Speed Limit Awareness: Understand that speed limits can be imposed by either the display or the controller. If your controller has a hardwired speed limit, the display cannot override it.
- No Returns for Incompatibility: Be aware that returns or exchanges are generally not accepted for non-quality issues, such as incompatibility with your ebike's controller.
- Voltage Compatibility: While most models support 24V/36V/48V/60V, always double-check the specific model's voltage compatibility.
8. Warranty and Support
For warranty information and technical support, please refer to the documentation provided with your purchase or contact the seller directly. Ensure you retain your proof of purchase for any warranty claims.