1. Product Overview
The Haytrix M5 is a smart electronic LCD controller meter display designed for electric bicycles. It provides essential riding data and control functions to enhance your e-bike experience.

Key Features:
- Battery indicator
- Headlight control
- Boost function
- Assist levels (PAS)
- Speed display (current, max, average)
- Trip/Total mileage (ODO, TRIP A, TRIP B)
- Running time (TM)
- Metric/Imperial conversion
- Fault indicator
- Walking mode
- Voltage display (VOL)
- Current operating current (CUR)
- Remaining mileage (RM)
Important Notice: The product protocol is UART2. Ensure your controller's protocol matches to avoid malfunction. The display's default speed limit is 100, but the actual speed displayed will be limited by your controller's settings.

2. Setup and Installation
Package Contents:
- Haytrix M5 LCD Display
- Mounting bracket
- Connection cables
Installation Process:
Follow these steps to install the M5 display on your e-bike handlebar:
- **Mounting the Display:** Position the display on your handlebar. The display is compatible with handlebar sizes 22.2mm, 25.4mm, 28.6mm, and 31.8mm. Use the appropriate transfer ring if needed.
- **Secure the Bracket:** Use the provided screw and Allen key to securely fasten the display bracket to the handlebar.
- **Connect Cables:** Connect the display's cables to your e-bike's controller. Refer to the wiring diagram and connector types below.

Wiring Connections:
The M5 display uses a 7-core connector. Ensure correct connection to your e-bike's controller. Inappropriate interface replacement may affect normal operation.


Instrument Outlet Line Sequence:
| Order of Line | Color of Line | Function |
|---|---|---|
| 1 | Red (VCC) | Instrument power cord |
| 2 | Blue (K) | Controller power line |
| 3 | Black (GND) | Meter earth wire |
| 4 | Green (RX) | Meter data receiving line |
| 5 | Yellow (TX) | Data transmission line of instrument |
Note: Some products use waterproof connections where wire colors may not be visible. Refer to the connector type.
3. Operating Instructions
Display Content:

The display shows various metrics:
- ENERGY BAR: Battery level indicator.
- SPEED: Current speed (MPH/KMH).
- PAS: Pedal Assist System level.
- VOL: Current battery voltage.
- Multifunctional display area: Can switch between ODO (Total Mileage), TRIP A (Single Mileage), TRIP B (Single Mileage), CUR (Current Operating Current), TM (Running Time), RM (Remaining Mileage).
- Headlight: Headlight status indicator.
Key Functions:
The M5 display typically has three buttons: Power, Up (+), and Down (-).
- Power On/Off: Press and hold the Power button to turn the display on or off.
- Multi-function Display Switch: When the display is on, click the Power button to cycle through the different metrics in the multifunctional display area (ODO, TRIP, VOL, CUR, TM). ODO is displayed by default after each power-on.
- PAS Level Adjustment: When the display is on, click the Up (+) button to increase the PAS level by 1, and click the Down (-) button to decrease the PAS level by 1. The default PAS level is 1.
- Front Light Control: On the normal speed display interface, press and hold the Up (+) button to turn the front light on or off.
- Walk Mode Function: When the e-bike is stationary, press and hold the Down (-) button to enter 6KM/h walk mode.
- Locked Mode: After pressing and holding the Down (-) button, the e-bike remains in walk mode even after releasing the button. To exit, press the Down (-) button again or apply the brake.
- Non-lock Mode: Press and hold the Down (-) button to activate walk mode. Release the button to exit walk mode.
- Speed Mode Display: On the normal speed display interface, press the Up (+) and Down (-) buttons simultaneously to switch between average speed, maximum speed, and real-time speed. Real-time speed is the default display.
Parameter Settings:
To enter settings, press and hold the Up (+) and Down (-) buttons simultaneously. Once in settings:
- Use the Power button to switch between parameters.
- Use the Up (+) button to increase a parameter value.
- Use the Down (-) button to decrease a parameter value.
- To save changes and exit, press and hold the Up (+) and Down (-) buttons again. If no action is taken for 8 seconds, the display will automatically exit and save the parameters.
Common Parameters (P-settings):
- P01: Backlight Brightness: Level 1 (darkest) to Level 3 (brightest).
- P02: Mileage Unit: 0 (KM), 1 (MILE).
- P03: Voltage Level: 24V, 36V, 48V, 60V (default 36V).
- P04: Dormancy Time: 0 (no dormancy), 1-60 minutes (default 10 minutes).
- P05: Help File Bit: 0 (3 file mode), 1 (5 gear mode).
- P06: Wheel Diameter: Unit in inches, precision 0.1. This affects speed display accuracy.
- P07: Speed Gauge Magnetic Steel Number: Range 1-100. This affects speed display accuracy.
- P08: Speed Limit: Range 0-100km/h (100 means no speed limit). This value is based on kilometers.
- P09: Zero Start/Non-Zero Start: 0 (zero start), 1 (non-zero start).
- P10: Drive Mode: 0 (Power Drive), 1 (Electric Drive), 2 (Power Drive and Electric Drive Coexistence).
- P11: Help Sensitivity Setting: Range 1-24.
- P12: Help Start Intensity Setting: Range 0-5.
- P13: Power Magnetic Steel Disk Type: 5, 8, 12.
- P14: Controller Limit Value: Default 12A, range 1-20A.
- P15: Controller Undervoltage.
- P16: ODO Zero Setting: Press and hold Power button for 5 seconds to clear ODO.
- P17: Cruising: 0 (no cruising), 1 (enable cruising). Automatic cruise is optional (valid for protocol 2 only).
- P18: Display Speed Ratio Adjustment: Range 50% - 150%.
- P19: 0 Power Bit: 0 (does not include 0).
- P20: Protocol: 0 (2 Protocol), 1 (5 Protocol), 2 (Standby), 3 (Standby).
Reset Defaults:
On the P16 menu interface, press and hold the Power button for 2 seconds to reset all defaults. Note that this operation cannot clear ODO.
4. Maintenance
To ensure the longevity and optimal performance of your Haytrix M5 display, follow these maintenance guidelines:
- Cleaning: Use a soft, damp cloth to wipe the display screen. Avoid using abrasive cleaners or solvents that could damage the acrylic window or housing.
- Protection: While the display has an IP65 rating for dust and water resistance, avoid prolonged exposure to heavy rain or submersion in water.
- Cable Inspection: Periodically check all cables and connectors for any signs of wear, damage, or loose connections. Ensure they are securely plugged in.
- Storage: When not in use for extended periods, store the e-bike and display in a dry, cool place away from direct sunlight and extreme temperatures.
5. Troubleshooting
If you encounter issues with your Haytrix M5 display, refer to the following common problems and their solutions:
Error Codes:
The display may show error codes to indicate specific issues:
| Status Code | State Meaning | Remarks |
|---|---|---|
| E06 | Battery under voltage | Check battery charge level. |
| E07 | Motor failure | Inspect motor connections and functionality. |
| E08 | Turn malfunctioning | Check throttle/turn signal connections. |
| E09 | Controller failure | Verify controller connections and status. |
| E10 | Communication reception failure | Check data receiving line (Green RX). |
| E11 | Communication dispatch failure | Check data transmission line (Yellow TX). |
General Troubleshooting Tips:
- **Display Not Turning On:** Check battery connection and charge. Ensure the power cable is securely connected.
- **Incorrect Speed Reading:** Verify P06 (Wheel Diameter) and P07 (Magnetic Steel Number) settings are correct for your e-bike.
- **Functionality Issues:** If the display is not working properly, ensure the communication protocol (UART2) matches your controller. A mismatch can cause abnormal operation.
- **No Speed Limit (or unexpected limit):** The display itself has no speed limit (set to 100 by default), but your e-bike's controller may enforce a speed limit. The display will reflect the controller's limit.

6. Specifications
General:
- Product Name: M5 Cycling Speed Odometer
- Model: M5
- Communication Method: UART2
- Compatible Voltage: 24V, 36V, 48V, 60V
Physical Characteristics:

- Dimensions (Display): 93.4mm (Height) x 56.4mm (Width) x 9mm (Thickness)
- Out Shell Material: ABS
- Window Material: High hardness acrylic
- Compatible Handlebar Sizes: 22.2mm, 25.4mm, 28.6mm, 31.8mm (with transfer rings)
Certifications:

- CE Certified
- RoHS Compliant
- SGS Certified
- IP65 Water and Dust Resistance
7. User Tips
- Protocol Matching: Always double-check that your e-bike controller uses the UART2 protocol. If it doesn't, the display may not function correctly. This is a common reason for compatibility issues.
- Kill Switch: The Haytrix M5 display includes a 'Kill Switch' feature, which can be useful for quickly cutting power in emergencies.
- Bafang Motor Compatibility: For Bafang BBS02B mid-drive motors, ensure the controller's protocol matches UART2. The display's functionality is dependent on this protocol, not just the motor model.
- Speed Limit: Be aware that while the display itself might not have a hard-coded speed limit, your e-bike's controller will likely have one, which the display will reflect.
8. Warranty and Support
For any technical assistance, warranty claims, or further inquiries, please contact the seller or manufacturer directly. Provide your product model (Haytrix M5) and any relevant purchase details.
A detailed user manual in PDF format is available for download: View User Manual (PDF)
Manufacturer Address: Zhongshan Town, Heshan City, Jiangmen City, China
Manufacturer Website: www.haytrix-display.com





