1. Introduction
The EBYTE E22 series LoRa Module with USB interface is a versatile wireless serial module designed for long-range, anti-interference communication. Utilizing advanced LoRa spread spectrum technology, these modules offer stable and reliable data transmission over distances up to 5 kilometers in open environments. They are ideal for various Internet of Things (IoT) applications, including industrial manufacturing, smart home systems, smart farming, and hotel management. The module features a standard USB interface for easy plug-and-play functionality and supports online firmware upgrades.
Video: Overview of the EBYTE E22-900T22U LoRa module and its antenna.
2. Setup Guide
2.1 Package Contents
- EBYTE E22 LoRa Module (Host)
- Antenna (TX400-JK-11 or similar, depending on frequency)
Image: Shipping kit contents, including the E22 module and antenna.
2.2 Hardware Connection
- Attach the Antenna: Carefully screw the provided antenna onto the SMA antenna connector on the side of the LoRa module. Ensure it is securely fastened.
- Connect to USB: Plug the USB standard interface of the LoRa module into an available USB port on your computer or host device.
Image: Hardware Interface Description, showing USB standard interface, two-color indicator, tactile switch, and SMA antenna connector.
2.3 Initial Configuration
Upon connection, the module may require driver installation depending on your operating system. The module features a tactile switch for mode switching and a two-color indicator LED for status indication:
- Tactile Switch: Press and hold for more than 1.5 seconds to switch between modes. Release the button to confirm the mode selection.
- Bicolor LED:
- Solid green: Indicates transmission mode.
- Flashing green: Indicates data transmission in progress.
- Solid red: Indicates configuration mode.
- Flashing red: Indicates command response process.
For detailed parameter configuration, refer to the RF Settling document available on the EBYTE website.
3. Operating Instructions
3.1 Data Transmission
The E22 module functions as a USB to LoRa wireless serial device, allowing data exchange and power supply via the USB interface. Once configured, data sent to the module via USB will be transmitted wirelessly using LoRa technology.
3.2 Communication Key
Users can set their own communication keys. Only receiving modules with the same key can receive data, enhancing the confidentiality of user data. The key cannot be read once set, ensuring security.
3.3 Listen Before Talk (LBT) Function
Before transmitting, the module actively listens for ambient noise in the channel. If the noise exceeds a certain value, transmission is delayed. This function improves the communication success rate in harsh environments and is used for network transmission and anti-collision processing.
Image: Explanation of Communication Key and Listen Before Talk (LBT) Function.
3.4 Remote Configuration
The module supports remote parameter modification, which effectively reduces installation, debugging, and maintenance costs in deployed systems.
3.5 Firmware Upgrade
The E22 module supports USB (serial port) IAP online firmware upgrades, allowing for easy updates and improvements to the module's functionality.
Image: Illustration of USB IAP online firmware upgrade and automatic relay networking.
3.6 Automatic Relay Networking
The module can realize multi-level relay networking, suitable for ultra-long distance or complex environment networking communication. In relay mode, the module only requires a power supply and does not need other control units.
3.7 Practical Functions
The E22 series modules offer a range of practical functions:
- Fixed-point transmission
- Broadcast monitoring
- Forward error correction
- Watchdog
- Remote configuration
- Firmware upgrade
- Parameter saving
- Variable packet length
Image: Practical functions and hardware features including Semtech chip, industrial-grade crystal oscillators, SMA antenna, and standard USB interface.
4. Maintenance
To ensure the longevity and optimal performance of your EBYTE LoRa module, follow these general maintenance guidelines:
- Keep the module clean and free from dust and debris.
- Avoid exposing the module to extreme temperatures or humidity.
- Handle the module with care to prevent physical damage.
- Ensure the antenna connection is always secure.
No specific routine maintenance is required beyond general care for electronic devices.
5. Troubleshooting
While the EBYTE LoRa module is designed for reliable operation, should you encounter issues, consider the following general steps:
- No Power/Indicator LED Off: Ensure the module is correctly plugged into a powered USB port. Try a different USB port or cable.
- No Communication:
- Verify that the correct drivers are installed on your host device.
- Check the antenna connection.
- Ensure both transmitting and receiving modules are configured with the same communication key and parameters (frequency, modulation method).
- Confirm that the modules are within range and not experiencing excessive interference.
- Unstable Communication:
- Check for potential sources of interference in the environment.
- Ensure the LBT function is enabled if operating in a noisy environment.
- Consider adjusting module placement or antenna orientation.
For more complex issues or specific error codes, please refer to the detailed user manual PDF available on the EBYTE website or contact EBYTE technical support.
6. Specifications
6.1 General Product Properties
- Brand Name: EBYTE
- Type: Drive IC
- Package: DIP (Direct Plug-in)
- Condition: New
- Origin: Mainland China
6.2 RF Parameters
| Parameter Name | E22-230T22U | E22-400T22U | E22-900T22U | Remarks |
|---|---|---|---|---|
| Working frequency band | 220.125 ~ 236.125MHz | 410.125 ~ 493.125MHz | 850.125 ~ 930.125MHz | E22-400T22U supports ISM band |
| Transmit power | 22dBm | The software is adjustable and requires users to develop settings by themselves. | ||
| Acceptance sensitivity | -122dBm | Over-the-air rate 2.4 kbps | ||
| FIFO | 240 Byte | Packetization bytes can be set to be sent through instructions. | ||
| Modulation method | LoRa | Next generation LoRa modulation technology | ||
| Measured distance | 5 Km | In a clear and open environment, the antenna gain is 5dBi. Antenna height 2.5 meters, air rate 2.4 kbps | ||
6.3 Hardware Parameters
| Parameter Name | Parameter Value | Remarks | ||
|---|---|---|---|---|
| Communication interface | USB | - | ||
| Packaging method | Direct plug-in | - | ||
| Interface mode | USB | - | ||
| Overall dimensions | 45.3*27.8*11.2mm | ±0.2mm, with housing and cap | ||
| Antenna form | SMA | Externally threaded inner hole, equivalent impedance is about 50Ω | ||
| Product net weight | 8.4g | ±0.3g | ||
6.4 Electrical Parameters (Instantaneous Power Consumption)
| Electrical Parameters | Minimum | Typical | Typical | Remarks |
|---|---|---|---|---|
| Supply voltage (V) | 4.8 | 5.0 | 5.5 | ≥5.0V guarantees output power, exceeding 5.5V permanently burns module |
| Emission current (mA) | - | 110 | - | Instantaneous power consumption |
| Receive current (mA) | - | 14 | - | Instantaneous power consumption |
| Operating temperature (°C) | -40 | 20 | 85 | Industrial grade design |
Image: Detailed tables outlining RF, hardware, and electrical parameters for the E22 series modules.
6.5 Physical Dimensions
Image: Physical dimensions of the E22 module (45.3mm x 27.8mm x 11.2mm).
7. User Tips
- Meshtastic Compatibility: Some users inquire about Meshtastic compatibility. Please refer to the official EBYTE documentation or community forums for specific compatibility details and configuration guides.
8. Warranty and Support
For detailed warranty information, technical support, and additional resources, please visit the official EBYTE website. You can find comprehensive documentation, FAQs, and contact information for customer service.
EBYTE Official Website: www.cdebyte.com
RF Settling Document: Download RF Settling
User Manual PDF: Download User Manual
