GP4-WLTE 4-Channel 4G Smart Controller User Manual

1. Introduction

The GP4-WLTE is a versatile 4-channel Digital Input (DI), Digital Output (DO), and Analog Quantity Input (AI) 4G remote controller. It is designed for various industrial and automation applications, offering remote control and monitoring capabilities via APP, SMS, and Web interfaces. This manual provides detailed instructions for setting up, operating, and maintaining your GP4-WLTE controller.

Attention: This device supports only 2G/4G networks and does not support 3G.

Model GP4-WLTE-EA does not support power failure alarm. Model GP4-WLTE-EC supports power failure alarm.

2. Key Features

• 4-Channel Analog Input (AI): Supports 4 channels of 4~20mA input with 12-bit accuracy.
• 4-Channel Digital Input (DI): Supports passive switch values (dry contact) for detection.
• 4-Channel Digital Output (DO): Equipped with relay outputs (10A@AC250V/DC30V). Each relay has an independent indicator for immediate status identification.
• Multiple Control Methods: Supports control via dedicated 'WLTE Control' APP, SMS commands, and Web interface.
• Communication Protocols: Provides TCP/HTTP protocols for integration with custom server platforms.
• RS-485 Support: Offers a simple RS-485 communication document for control and data retrieval via Modbus protocol.
• Wide Voltage Input: Operates within a working voltage range of 9-24V DC, suitable for various industrial environments.
• Remote Linkage Actions: Supports AI/DI with remote linkage actions for complex automation logic.
• SMS Alarms: Configurable SMS alarms for events such as analog thresholds being met.
• Power Failure Alert: GP4-WLTE-EC model includes power failure alert functionality.

3. Package Contents

Verify that all items are present in your package:

• GP4-WLTE Smart 4G Controller
• 4G Antenna
• Power Adapter (EU/AU/US/UK Plug, depending on region)
• User Manual (this document)

4. Specifications

5. Safety Information

• Ensure the power supply voltage is within the specified range (9-24V DC).
• All wiring should be performed by qualified personnel to prevent electrical hazards.
• Disconnect power before performing any wiring or maintenance.
• Do not expose the device to extreme temperatures, humidity, or corrosive environments.
• Keep the device away from water and other liquids.
• The power of DC motors directly controlled by the relay must be less than 80W. For higher power AC motors, an AC contactor is required.

6. Setup

6.1 Device Overview

6.2 SIM Card Installation

1. Locate the Micro SIM card slot on the device.
2. Insert a standard Micro SIM card into the slot. Ensure it is correctly oriented.

6.3 Antenna Connection

1. Locate the SMA antenna interface on the device.
2. Screw the provided 4G antenna onto the SMA connector until secure.

6.4 Power Connection

1. Connect the provided power adapter to the DC Power input port (9-24V DC).
2. Plug the power adapter into a suitable power outlet. The device will power on.

6.5 Wiring Diagrams

Important: Circuit wiring requires professional operation. Please handle it carefully.

6.5.1 Dry-Contact Input Wiring

The GP4-WLTE supports 4 channels of dry-contact inputs (DI1-DI4). Connect passive switches or sensors that provide a dry-contact output to these terminals. The diagram illustrates connecting to a passive switch/micro switch and an electric door with a level switch or wired door sensor.

6.5.2 Output Wiring (Relay Control)

The GP4-WLTE provides 4 relay outputs (COM1-COM4) with Normally Open (NO) and Normally Closed (NC) contacts. These can be used to control various devices:

• DC Motor or Other Device (Power below 80W): Connect the motor directly to the relay contacts.
• AC Bulb/LED/Device (Power below 200W): Connect the AC load directly to the relay contacts.
• High-Power AC Motor Control (More than 400W): Use an external AC contactor. The GP4-WLTE relay controls the coil of the AC contactor, which in turn controls the high-power motor. This applies to both two-phase and three-phase motors.
• Access System Application: Connect the relay to control electronic locks or other access control components.

6.5.3 Analog Input Sensor Wiring

The GP4-WLTE supports 4 channels of 4-20mA analog inputs (AI1-AI4). Various 4-20mA transmitters can be connected, such as pressure, temperature, hydrogen sulfide, PT100, current, wind pressure, liquid level, and water temperature sensors.

Wind Speed Sensor Wiring Diagram

Connect the brown wire of the wind speed sensor to VCC, the black wire to GND, and the blue wire to AI2. Follow the APP configuration steps in Section 7.1.3 to set up the analog input for wind speed.

PT100 Transmitter Wiring Diagram

Connect the red wire of the PT100 transmitter to VCC, the black wire to GND, and the blue wire to AI1. Follow the APP configuration steps in Section 7.1.3 to set up the analog input for PT100 temperature.

Liquid Level Sensor Wiring Diagram

Connect the red wire of the liquid level sensor to VCC, the black wire to GND, and the blue wire to AI1. Follow the APP configuration steps in Section 7.1.3 to set up the analog input for liquid level.

Soil Temperature and Humidity Sensor Wiring Diagram

Connect the brown wire of the soil sensor to VCC, the black wire to GND, the yellow wire to AI3 (Soil Temperature Analog Output), and the blue wire to AI4 (Soil Humidity Analog Output). Follow the APP configuration steps in Section 7.1.3 to set up the analog inputs for soil temperature and humidity.

7. Operation

7.1 APP Control ('WLTE Control')

The primary control method is through the 'WLTE Control' app, available in app stores. This app allows for convenient parameter configuration and linking to Digital Output (DO) relays for complex automation control logic.

7.1.1 Adding a Device

1. Download and install the 'WLTE Control' app from your app market.
2. Open the app and register/log in.
3. Select 'Add device'. You can either 'Scan QR code' or 'Manual Input' the device details.
4. Follow the on-screen prompts to complete device registration.

7.1.2 Channel Control

The app provides an interface to monitor analog inputs (AI) and control digital outputs (DO). You can toggle channels ON/OFF directly from the app.

7.1.3 Analog Input Configuration

To obtain accurate readings from connected analog sensors, you need to configure the analog input settings in the app:

1. In the app, navigate to the analog input section (e.g., AI1, AI2, AI3, AI4).
2. Long press on the analog input to enter its settings.
3. Name Modification: Change the name of the analog input to reflect the connected sensor (e.g., "Wind Speed", "PT100", "Liquid Level", "Soil Temperature", "Soil Humidity").
4. Analog Quantity Setting: Configure the parameters for the specific sensor:
   • Unit: Set the unit of measurement (e.g., °C, %, m, m/s).
   • Sensor Max/Min: Enter the maximum and minimum values the sensor can measure.
   • Analog Max/Min: Enter the maximum and minimum analog current values (typically 20 and 4 for 4-20mA sensors).
5. Confirm the settings. Refresh the app to see the updated readings.

7.1.4 Advanced APP Features

• Temperature Control: Set a temperature threshold. When the detected temperature reaches this value, an alarm message can be sent, and a relay can be triggered.
• Timing Control: Schedule up to 24 groups of timing tasks to turn devices ON/OFF daily or on specific days.

• Power Failure Alert (GP4-WLTE-EC only): Receive SMS/APP/Email alerts upon power failure and power restoration.
• Email Pushing: Receive notification emails when a configured temperature or other parameter reaches a preset value.
• APP Pushing: Get APP notifications to stay informed about device status.

• Short-time Trigger Switch: Configure a trigger time (1 to 1000 seconds) for momentary actions, such as opening a garage door.

7.2 SMS Control

You can control the device and receive alarms via SMS messages.

For example, you can send specific SMS commands to turn channels ON/OFF or query the status. SMS alarms can be configured to notify you when analog inputs reach certain thresholds (e.g., liquid level). Refer to the detailed SMS command list in the product documentation for specific commands.

7.3 Dial Control

The device can also be controlled by dialing specific numbers, allowing for simple ON/OFF control of connected devices.

This method is useful for basic remote switching of appliances like electric heaters, water heaters, electric fans, or electric doors.

7.4 Web Control

The GP4-WLTE supports centralized control via a web browser on a PC, offering a comprehensive interface for managing your devices.

This allows for remote monitoring and control from any internet-connected device with a web browser.

7.5 Application Scenarios

The GP4-WLTE is suitable for a wide range of applications:

• Agriculture: Pumped irrigation, seedling cultivation, aquatic products management.
• Home Appliance Control: Remote control of household appliances.
• Industrial Application: Equipment matching, efficiency improvement.
• Base Station Control: Unattended remote control.
• Solar Energy Project: Matching equipment, efficiency improvement.
• Door Opener: Remote control of electric gates and rolling gates.

8. Maintenance

• Regularly check all wiring connections to ensure they are secure.
• Keep the device clean and free from dust and debris.
• Ensure proper ventilation around the device to prevent overheating.
• Periodically check for firmware updates through the app or manufacturer's website to ensure optimal performance and security.
• If the device is exposed to harsh environmental conditions, inspect it more frequently for signs of wear or damage.

9. Troubleshooting

9.1 No Network Connection

• Check if the SIM card is correctly inserted and activated.
• Ensure the 4G antenna is securely connected.
• Verify that the SIM card has an active data plan and sufficient balance.
• Check the signal indicator (SIG LED) on the device. If it's not blinking or solid, there might be a network issue.
• Confirm that the device is in an area with 2G/4G coverage.

9.2 Relays Not Responding

• Check the power supply to the GP4-WLTE controller.
• Verify the wiring of the relays to the controlled devices. Ensure COM, NO, and NC connections are correct.
• Confirm that the control commands (APP, SMS, Web) are being sent correctly and are received by the device.
• Check the relay indicator LEDs on the device to see if they are changing state.
• Ensure the load connected to the relay is within its specified limits (10A@AC250V/DC30V). For high-power AC loads, confirm the AC contactor is correctly wired and functioning.

9.3 Incorrect Analog Readings

• Verify the wiring of the analog sensor to the AI terminals (VCC, GND, AIx).
• Ensure the sensor is a 4-20mA type and is functioning correctly.
• Check the analog input configuration in the 'WLTE Control' app (Sensor Max/Min, Analog Max/Min, Unit). Incorrect settings will lead to inaccurate readings.
• Ensure the sensor is properly calibrated.

9.4 APP/Web Control Issues

• Ensure your smartphone or PC has an active internet connection.
• Verify that the GP4-WLTE controller has a stable 4G network connection.
• Check if the device is correctly added and online in the 'WLTE Control' app.
• For web control, ensure the correct IP address or domain is used and that network firewalls are not blocking access.

10. User Tips

• Analog Input Flexibility: While the device primarily supports 4-20mA analog input, it may be possible to adapt 0-5V or 0-10V sensors using external signal converters if needed. The app allows for custom unit adjustments, so you can configure it to display values in specific units like grams, meters, or percentages after proper sensor calibration.
• Power Outage Alerts: For critical applications where power continuity is essential, consider using the GP4-WLTE-EC model, which includes a power failure alarm feature. This can provide timely notifications via SMS, APP, or email, allowing for quick response to power interruptions.
• API Integration: If you have specific automation needs or want to integrate the GP4-WLTE into an existing system, leverage the provided TCP/HTTP API documentation for custom control and data retrieval.

11. Warranty and Support

For warranty information, technical support, or service inquiries, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase.