EBYTE E28-2G4M27SX 2.4GHz LoRa trådløst RF-modul brugermanual

1. Produktet er slutview

The E28-2G4M27SX is a high-performance 2.4GHz RF transceiver module developed by EBYTE. It features a transmit power of 500mW and utilizes an SPI interface for communication. Designed with a small-volume SMD type (pin spacing 1.27mm), this module incorporates a 52MHz industrial-grade high-precision low-temperature drift crystal oscillator, ensuring stable and reliable performance in various applications.

This module is built around the SX1281 radio frequency chip, which supports multiple physical layers and modulation methods, including LoRa, FLRC, and GFSK. It is also compatible with Bluetooth protocols. The integrated Power AmpPA- og lavstøjsdæmper Amplifier (LNA) enhance its maximum transmit power to 500mW and improve receiving sensitivity, leading to significantly improved communication stability.

Figure 1.1: EBYTE E28-2G4M27SX 2.4GHz LoRa Wireless RF Module.

2. Nøglefunktioner og -funktioner

• Udvidet kommunikationsområde: Achieves communication distances up to 8km under ideal conditions.
• Høj sendeeffekt: Built-in PA+LNA provides a maximum transmit power of 500mW.
• Bluetooth Kompatibilitet: Supports BLE protocol.
• Frekvensbånd: Operates in the license-free ISM 2.4GHz frequency band.
• Flexible Data Rates: Supports data transmission rates from 0.595kbps to 2Mbps.
• Flere modulationstilstande: Includes GFSK, FLRC, and LoRa modes.
• Bredt strømforsyningsområde: Supports 2.5V to 3.6V power supply, with optimal performance above 3.3V.
• Adjustable Air Rate: Up to 1.3Mbps under FLRC modulation.
• Enhanced Anti-blocking: Excellent anti-blocking properties for reliable communication.
• Ranging Functionality: Includes Time-of-flight (ToF) function for ranging applications.
• Lavt strømforbrug: Extremely low current consumption in low-power mode.
• RSSI Support: SX1281 supports RSSI for in-depth secondary development.

Figur 2.1: Overview of key functions including BLE Protocol, Multiple Modulation Modes, Ranging Engine, and High-speed LoRa.

3. Tekniske specifikationer

Figure 3.1: Physical dimensions of the E28-2G4M27SX module (20mm x 15mm).

Figure 3.2: Agilent Spectrogram showing the module's RF performance, tested with an Agilent N9030A Spectrum Analyzer.

4. Opsætning og integration

The E28-2G4M27SX is a pure RF transceiver module and requires an external Microcontroller Unit (MCU) for operation. Users will need to develop or integrate firmware on their chosen MCU to control the module via its SPI interface.

Definitioner af 4.1 ben

Refer to the module's datasheet for detailed pin definitions and electrical characteristics. Proper connection of power, ground, SPI lines (SCK, MISO, MOSI, CS), and other control pins (e.g., RESET, DIO) is crucial for correct functionality.

4.2 Strømforsyning

Sørg for, at strømforsyningen voltage is within the 2.5V to 3.6V range. For optimal performance, a stable power supply of 3.3V or higher is recommended. Adequate decoupling capacitors should be placed close to the module's power pins to minimize noise.

4.3 Antenneforbindelse

The module features an IPEX antenna interface. Connect a suitable 2.4GHz antenna to this port. The performance of the wireless link is highly dependent on the antenna's quality and placement. Avoid placing the antenna near metal objects or within enclosures that could obstruct the RF signal.

5. Betjeningsvejledning

Operation of the E28-2G4M27SX module is primarily controlled through the SPI interface by the host MCU. The SX1281 chip offers various registers and commands to configure its operating modes, modulation schemes, and data transmission parameters.

5.1 SPI Communication

Implement SPI communication routines in your MCU firmware to read from and write to the module's registers. The SPI clock speed should be configured according to the module's specifications to ensure reliable data transfer.

5.2 Konfigurationsparametre

Key parameters to configure include:

• Driftstilstand: Set the module to transmit, receive, or sleep modes.
• Modulation Type: Select LoRa, FLRC, or GFSK based on application requirements.
• Frekvenskanal: Configure the desired operating frequency within the 2.4GHz band.
• Sendeeffekt: Juster udgangseffektniveauet.
• Datahastighed: Set the desired air data rate.
• Pakkeformat: Define packet length, CRC, and header settings.

Refer to the SX1281 datasheet and EBYTE's programming guide for detailed register maps and configuration examples.

5.3 Data Transmission and Reception

Once configured, data can be transmitted by writing payload data to the module's FIFO buffer and initiating a transmit command. For reception, the module will indicate incoming packets via an interrupt pin (e.g., DIO1), after which the received data can be read from the FIFO.

6. Vedligeholdelse og bedste praksis

The E28-2G4M27SX module is designed for robust and stable operation. Adhering to best practices can further ensure its longevity and performance.

• Miljøforhold: Operate the module within its specified temperature and humidity ranges. Avoid exposure to extreme temperatures, moisture, or corrosive environments.
• Strømstabilitet: Provide a clean and stable power supply. Voltage fluctuations or ripple can affect RF performance.
• ESD beskyttelse: Handle the module with care, especially during integration, to prevent electrostatic discharge (ESD) damage. Use appropriate ESD precautions.
• Firmwareopdateringer: Keep your MCU firmware updated with the latest drivers and libraries provided by EBYTE or the chip manufacturer (if available) to benefit from performance improvements or bug fixes.
• Antennepleje: Ensure the antenna is securely connected and not damaged. A damaged antenna can significantly degrade communication range and reliability.

7. Fejlfinding

If you encounter issues with the E28-2G4M27SX module, consider the following troubleshooting steps:

• No Communication with MCU:
  • Verify SPI connections (SCK, MISO, MOSI, CS) and power supply.
  • Check if the module is correctly powered on and reset.
  • Ensure SPI clock speed and mode (CPOL, CPHA) match the module's requirements.
• Poor RF Performance/Short Range:
  • Check antenna connection and ensure it is suitable for 2.4GHz.
  • Verify antenna placement; avoid obstructions or metal enclosures.
  • Confirm transmit power settings in firmware.
  • Check for local interference from other 2.4GHz devices (Wi-Fi, Bluetooth).
  • Ensure power supply is stable and sufficient (especially for 500mW output).
• Modulet svarer ikke:
  • Perform a hardware reset of the module.
  • Re-check all wiring and power connections.
  • Ensure the MCU is correctly initializing the module.
• Datakorruption:
  • Verify data rate and modulation settings are consistent between transmitter and receiver.
  • Check for packet loss or CRC errors.
  • Ensure proper handling of FIFO buffers in firmware.

For persistent issues, consult the detailed technical documentation provided by EBYTE or seek support from the manufacturer.

8. Anvendelsesscenarier

The E28-2G4M27SX module's versatile features make it suitable for a wide range of applications:

Figure 8.1: Diverse applications including Industrial Manufacturing, Smart Home, Smart Farm, and Hotel Management.

• Smart Homes: Physical layer technology solutions for home Internet of Things (IoT) devices.
• Sikkerhedssystemer: Reliable wireless communication for sensors and alarms.
• Location Tracking & Wireless Ranging: Utilizing Time-of-flight function for precise distance measurement.
• Bærbare enheder: Compact size and low power consumption suitable for smart bracelets and health management.
• Industrial Manufacturing: Short-distance industrial field applications, replacing signal cables and simplifying wiring.
• Smart Farms: Accurately monitoring details of operation areas.
• Hotelledelse: Supporting a large number of access points for robust connectivity.

9. Producentens information og support

This product is manufactured by EBYTE.

Figure 9.1: Module label indicating manufacturer EBYTE.

For further technical documentation, software development kits (SDKs), or direct support, please visit the official EBYTE webwebsted:

http://www.cdebyte.com/

9.1 Garantioplysninger

Se venligst producentens officielle website or product packaging for detailed warranty terms and conditions. Typically, warranty covers defects in materials and workmanship under normal use for a specified period from the date of purchase.