Introduction
Thank you for choosing the SinoTrack ST-901L 4G GPS Tracker. This manual provides detailed instructions for the proper installation, operation, and maintenance of your device. Please read this manual thoroughly before using the product to ensure optimal performance and safety.
The ST-901L is a compact and waterproof GPS tracker designed for vehicles, motorcycles, and scooters. It supports 4G+2G networks for reliable positioning and tracking, offering features like real-time tracking, history route playback, geo-fencing, and various alarms.
Key Features
- Waterproof design
- Mini size for easy concealment
- ACC Detection (ACC Alarm)
- Remote Engine Cut-off (requires 4PIN cable with Relay)
- Main power off alarm (with built-in battery)
- Geo-fence alarm & Over speed alarm
- Suitable for Vehicle/Motorcycle/Scooter/Bus
- Built-in high sensitivity GPS & GSM antenna
- 4G+2G Network GPS/GPRS/GSM/SMS Positioning and Tracking
- SMS tracking on cellphone with Google Maps link
- Built-in 150mAh battery
Specifications
| Feature | Detail |
|---|---|
| Brand Name | SinoTrack |
| Model Name | ST-901L |
| GPS Type | GPS Tracker |
| Special Features | Internet Connected |
| GPS Geographic Location | Global (South America mentioned as example) |
| Screen Size | No screen |
| Battery Life | 1 to 4 Hours (Built-in 150mAh battery) |
| Out Power | 0.02W |
| Voltage | 12 V (Supports 12V/24V systems) |
| GPS Module | Yes |
| Certification | CE |
| Network | 4G+2G |
| Dimensions | Approx. 3.54 inch (L) x 2.04 inch (W) x 0.66 inch (H) |
For visual reference of the product dimensions:

Image: SinoTrack ST-901L GPS Tracker with dimensions and feature icons.
Package Contents
The package includes the following items, depending on the variant purchased:
Standard Package (3PCS ST-901L)
- 3 * ST-901L Main Unit
- 3 * User manual
- 3 * Sticker

Image: Package contents for 3 ST-901L units.
Package with Relay (3PCS ST-901L with Relay)
- 3 * 4 PIN ST-901L Main Unit
- 3 * User manuals
- 3 * Relays
- 3 * Stickers

Image: Package contents for 3 ST-901L units with relays.
Ensure all components are present and in good condition upon unboxing. A user manual is included in the retail package.
Setup and Installation
1. SIM Card Installation
- Unscrew the lid of the tracker to open it.
- Insert a local SIM card with 4G network capability. The SIM card should be a Normal SIM card and should not have a PIN code enabled.
- The tracker will automatically identify the APN (Access Point Name). If the APN is not recognized, you may need to set it manually (refer to "Set APN" in the Operating Instructions).
- Charge the device for at least 1 hour.
- Take the device outside and turn on the switch. The LED lights will start blinking, indicating proper operation.
For a visual guide on SIM card installation:

Image: Steps for SIM card insertion and basic wiring connections.
2. Wiring and Device Placement
The GPS antenna side of the tracker should face towards a clear sky for optimal signal reception. Avoid placing it under metal objects; glass and plastic covers are acceptable.
Connect the wires as follows:
- Red wire: Connect to Power + (12V or 24V battery).
- Black wire: Connect to Power - (Ground).
- Orange wire: Connect to ACC port (Accessory power, which is live when the ignition is on).
- Yellow wire: Connect to the Relay (for remote engine cut-off functionality).
Refer to the wiring diagram for detailed connections:

Image: Wiring diagram for the ST-901L GPS Tracker.
The device supports both 12V and 24V systems, making it suitable for cars, trucks, motorcycles, and scooters.
Operating Instructions
1. LED Status Indicators
The tracker uses LED lights to indicate its status:
| LED Color | Status | Meaning |
|---|---|---|
| Blue LED | Flashing | No GPS Signal or GPS starting |
| Blue LED | ON | GPS OK |
| Orange LED | Flashing | No SIM card or GSM starting |
| Orange LED | ON | GSM OK |
2. Tracking Platform Access
You can track your device using the SinoTrack PRO mobile application or the web platform.
Mobile App:
- Search for "SinoTrack PRO" on the Apple App Store (iOS) or Google Play Store (Android).
- Download and install the app.
- Login with the following details:
- Server: Pro.SinoTrack
- User: Your device's ID number (found on the tracker)
- Password: 123456 (default, change after first login)
App login screen example:

Image: SinoTrack PRO App Login.
The app allows for real-time tracking and history route playback.

Image: Mobile App Real-time Tracking.
Web Platform:
- Visit the website: www.sinotrack.com or http://45.112.204.246
- Login using the same credentials as the mobile app.
Web platform interface example:

Image: SinoTrack Web Tracking Platform.
3. Activating Online Tracking (SMS Configuration)
To ensure your tracker connects to the platform for online tracking, you may need to send specific SMS commands. Replace "password" with your device's password (default is 0000).
- Set GPRS Mode: Send SMS:
710password(e.g.,7100000for default password). Reply: SET OK. - Set Server IP and Port: Send SMS:
804password 45.112.204.246 8090(e.g.,8040000 45.112.204.246 8090). Reply: SET OK. - Set APN: The APN (Access Point Name) is specific to your SIM card provider. If the tracker doesn't automatically identify it, you'll need to set it manually.
- If APN does not require a username and password: Send SMS:
803password APN(e.g.,8030000 INTERNET). Reply: SET OK. - If APN requires a username and password: Send SMS:
803password APN APNuser APNpassword. Reply: SET OK.
You can find your SIM card's APN information from your mobile network provider or online resources like apn.how.
- If APN does not require a username and password: Send SMS:
Watch this video for a quick setup guide:
Video: SinoTrack ST-901L GPS Tracker Setup and Tracking Demonstration.
4. Key SMS Commands and Functions
All commands should be sent via SMS to the tracker's phone number. Replace "password" with your device's password (default: 0000).
- Set Control Number:
- Command:
Numberpassword serial - Example:
139504434650000 1(Sets +86 13950443465 as the first control number with password 0000). - Reply: SET OK. You can set up to three control numbers.
- Command:
- Change Password:
- Command:
777NewPasswordOldPassword - Example:
77712340000(Changes password from 0000 to 1234). - Reply: SET OK.
- Command:
- Get Location with Google Link:
- Command:
669password - Example:
6690000 - The tracker will reply with GPS data and a Google Maps link.
- Command:
- Get Location by Phone Call:
- Call the SIM card number in the tracker. It will hang up and reply with a Google Maps link.
- If the device is in an invalid location, it will send the last valid location and then send a new one once a signal is acquired.
- Change Time Zone:
- Command:
896passwordE/WHH(E for East, W for West, HH for hours offset). - Example:
8960000E02(Sets time zone to GMT+2). - Reply: SET OK.
- Command:
- Geo-fence Alarm: (Sends alarm to the first control number only)
- Open Geo-fence:
211password(e.g.,2110000). Reply: SET OK. - Close Geo-fence:
210password(e.g.,2100000). Reply: SET OK. - Set Geo-fence radius:
005password DistanceInMeters(e.g.,0050000 1000for 1000 meters). Reply: SET OK.
- Open Geo-fence:
- Over Speed Alarm: (Sends alarm to control numbers)
- Command:
122password XXX(XXX is speed in KM/H, 0-999). - Example:
1220000 120(Sets over speed alarm at 120 KM/H). - To close:
122password 0. - Reply: SET OK.
- Command:
- Shock Alarm: (Sends SMS alarm to the first control number)
- Open Shock Alarm:
181passwordTSeconds(Seconds: 0-120, duration of shocking). - Example:
1810000T10(Activates shock alarm with 10-second sensitivity). - Close Shock Alarm:
180password(e.g.,1800000). - Reply: SET OK.
- Open Shock Alarm:
- Low Battery Alarm:
- The tracker automatically sends a "Low Power Alarm" SMS to the first control number when the battery level drops to 20% (Bat:1).
- Battery levels: Bat:5 (100%), Bat:4 (80%), Bat:3 (60%), Bat:2 (40%), Bat:1 (20%).
- ACC On/Off Alarm:
- Open ACC on alarm (SMS):
886password. Reply: SET OK. - Close ACC on alarm (SMS):
887password. Reply: SET OK. - Open ACC on alarm (Phone Call):
888password. Reply: SET OK. - Close ACC on alarm (Phone Call):
889password. Reply: SET OK.
- Open ACC on alarm (SMS):
- Call Mode:
- Call mode on:
150password. When on, alarms will call and send SMS. Reply: SET OK. - Call mode off:
151password. When off, alarms will only send SMS. Reply: SET OK.
- Call mode on:
- Cut Engine Remotely: (Requires 4PIN cable with Relay)
- Command:
940password. Reply: SET OK. - Attention: This function only works when the vehicle speed is below 20 KM/H. If the speed is higher, the engine will not cut off.
- Recover Engine:
941password. Reply: SET OK.
- Command:
- Set GPRS Upload Time Interval:
- ACC on time interval (default 20 seconds):
805password T(T in seconds, 0-180). Example:8050000 20. Reply: SET OK. - ACC off time interval (default 180 seconds):
809password T(T in seconds, 0-180). Example:8090000 180. Reply: SET OK. - Setting T=0 closes GPRS. Minimum time interval is 10 seconds.
- ACC on time interval (default 20 seconds):
- Sleep Mode:
- Command:
SLEEPpassword T(T in minutes, tracker sleeps when vehicle stopped for T minutes). - Example:
SLEEP0000 5(Tracker sleeps after 5 minutes of inactivity). Reply: SET OK. - To close sleep mode (tracker works all the time):
SLEEP0000 0.
- Command:
Troubleshooting
If you encounter issues, refer to the following common problems and solutions:
| Problem | Possible Cause / Solution |
|---|---|
| Device shows "unactivated" on platform | Check SIM card balance, internet plan, and APN settings. Send RCONF to device to verify settings. |
| Device shows "offline" on platform | Check SIM card balance and internet plan. Verify APN, IP, and Port settings. Send RCONF to device. |
| Orange LED is flashing | No SIM card or GSM network issue. Ensure SIM is properly inserted and has network coverage. |
| Blue LED is flashing | No GPS signal or GPS is starting. Take the device to an open area with clear sky. |
| Device doesn't send SMS alarm | Check SIM card balance and ensure it can send SMS. Verify control numbers are set correctly. |
| Cannot login app or website | Ensure correct server (Pro.SinoTrack or SinoTrackPro) is selected. Verify device ID and password. |
| Device shows incorrect location | Take the device to an open area to get good GPS signal. |
| Device doesn't send SMS command | Check SIM card balance and ensure it can send SMS. |
| Device responds SMS link to any phone | This is normal behavior for location requests. To manage who receives alarms, set control numbers. |
| How to change IMEI? | You cannot change the IMEI. It is a unique identifier. |
| Does your device support 3G or 4G SIM card? | Yes, it supports 4G+2G networks. Ensure your SIM card is compatible. |
| How much internet data is used per month? | Approximately 50-100MB/month. |
For a full configuration report, send the SMS command RCONF to the tracker. It will reply with a detailed status of all settings.
User Tips
- Always ensure your SIM card has sufficient balance and an active data plan for continuous online tracking.
- For optimal GPS signal, place the tracker where its antenna side has a clear view of the sky.
- If using the remote engine cut-off feature, remember it only works at speeds below 20 KM/H for safety reasons.
- Regularly check the device's battery status, especially if relying on the main power off alarm.
- The mobile app is free to use and provides a convenient way to monitor your tracker.
- The device supports 12V and 24V systems, making it versatile for various vehicle types, including trucks.
Maintenance
- Keep the device dry. Moisture can damage internal circuits.
- Do not expose the device to extreme temperatures.
- Clean the device with a dry cloth. Do not use harsh chemicals or cleaning solvents.
- Ensure all wiring connections are secure and free from corrosion.
- Periodically check the SIM card for proper insertion and functionality.
Support and Further Information
For more detailed information, you can refer to the official user manual PDF: SinoTrack ST-901L User Manual (PDF).
If you have further questions or require technical assistance, please contact SinoTrack Official Store support. They typically respond to inquiries within 24 hours.





