1. 서론
The EBYTE E32-900T20D is a LoRa wireless module designed for long-range, low-power data transmission. It operates in the 868MHz and 915MHz frequency bands, offering robust anti-interference capabilities and extended communication distances up to 5.5 kilometers. This module integrates a serial port interface, making it suitable for various embedded applications requiring reliable wireless connectivity.
그림 1: 전면 view of the EBYTE E32-900T20D LoRa Wireless Module.
2. 주요 특징
- LoRa 확산 스펙트럼 기술: Utilizes LoRa Direct Sequence Spread Spectrum for enhanced communication range and interference resistance.
- Dual Frequency Bands: Supports both 868MHz and 915MHz operation.
- High Transmit Power: Features a 20dBm (100mW) transmit power output.
- 장거리 통신 거리: Capable of transmitting data up to 5.5 kilometers in optimal conditions.
- 직렬 포트 인터페이스: Easy integration with microcontrollers via UART (TX, RX).
- 다양한 작업 모드: Offers Transmission, Wake-up, Power Saving, and Deep Sleep modes for flexible power management.
Figure 2: Illustration of LoRa spread spectrum communication benefits.
3. 사양
| 매개변수 | 값 |
|---|---|
| 모델 번호 | E32-900T20D |
| 주파수 대역 | 868MHz / 915MHz |
| 전송 전력 | 20dBm(100mW) |
| 통신 거리 | 최대 5.5km(시야) |
| 인터페이스 | UART (Serial Port) |
| 치수(L x W) | 36mm x 21mm |
| 제조업체 | 이바이트 |
| 패키지 크기 | 2.4 x 2.01 x 0.47 인치 |
| 무게 | 0.71 온스 |
Figure 3: E32-900T20D module with physical dimensions.
4. Pin Definitions and Hardware Interface
The E32-900T20D module features a standard pin header for integration. For detailed pinout information, including specific functions for VCC, GND, TX, RX, AUX, M0, and M1 pins, please refer to the official EBYTE E32-900T20D datasheet available on the manufacturer's website. Proper connection of these pins to your microcontroller or host device is crucial for correct operation.
- VCC: 전원 공급 장치 입력.
- GND : 접지 연결.
- TX : Transmit data output (connects to RX of host).
- RX : Receive data input (connects to TX of host).
- 보조: Auxiliary pin, often used for status indication (e.g., data ready).
- M0, M1: Mode selection pins, used to configure the module's operating mode.
5. 설정 및 연결
- 전원 공급 장치: Connect the VCC pin to a stable power source within the module's specified voltage range. Connect GND to the system ground.
- 직렬 통신: Connect the module's TX pin to the RX pin of your microcontroller or host device, and the module's RX pin to the TX pin of your host device. Ensure both devices share a common ground.
- 안테나 연결: Securely attach a compatible 868MHz or 915MHz antenna to the module's antenna connector. An improperly connected or missing antenna can damage the module.
- 모드 선택: Use the M0 and M1 pins to set the desired operating mode. Refer to the datasheet for specific pin configurations for each mode.
- 소프트웨어 구성 : Configure your host device's UART settings (baud rate, parity, stop bits) to match the module's default or configured settings. The module can often be configured via AT commands through the serial interface.
6. 작동 모드
The E32-900T20D module supports four distinct operating modes, each optimized for different application requirements:
- 전송 모드: This is the standard transparent transmission mode, commonly used for continuous data exchange.
- 웨이크업 모드: Designed for low-power applications, this mode allows the transmitter to wake up the receiver by automatically adding a wake-up code before data transmission.
- 절전 모드: In this receiver-only mode, the module consumes less power. It can receive data but cannot initiate transmissions.
- 깊은 절전 모드: The lowest power consumption mode, where the module's overall power consumption is significantly reduced (e.g., to 2uA), ideal for battery-powered devices requiring minimal activity.
그림 4: 이상view of the four working modes.
7. 응용 프로그램 시나리오
The E32-900T20D LoRa module's long-range and low-power characteristics make it suitable for a wide range of Internet of Things (IoT) and industrial applications:
- Smart Agriculture: Environmental monitoring, irrigation control, livestock tracking.
- 무선 원격 제어: Industrial equipment control, smart home devices.
- Industrial Scene: Sensor data collection, asset tracking, process automation.
- 스마트 웨어러블: Low-power communication for wearable devices.
그림 5: 예amples of application scenarios for the E32-900T20D module.
8. 문제 해결
E32-900T20D 모듈에 문제가 발생하면 다음 문제 해결 단계를 고려하세요.
- 통신 없음:
- 전원 공급 장치 볼륨 확인tage and ground connections.
- Check serial port wiring (TX to RX, RX to TX).
- Ensure UART baud rate, data bits, parity, and stop bits match on both devices.
- Confirm M0 and M1 pins are set correctly for the desired operating mode.
- 단거리 통신 범위:
- Ensure the antenna is securely connected and is appropriate for the operating frequency (868MHz or 915MHz).
- Check for physical obstructions between modules.
- Verify transmit power settings (if configurable).
- 모듈이 응답하지 않음:
- Perform a power cycle.
- Check for any short circuits or incorrect wiring that might damage the module.
For persistent issues, refer to the official EBYTE datasheet or contact technical support.
9. 유지관리
To ensure the longevity and optimal performance of your E32-900T20D module:
- Keep the module in a dry environment, away from moisture and corrosive substances.
- Avoid exposing the module to extreme temperatures or sudden temperature changes.
- Handle the module with care to prevent physical damage to components or pins.
- Ensure proper ventilation if operating in an enclosed space.
10. 보증 및 지원
The EBYTE E32-900T20D LoRa Wireless Module is manufactured by EBYTE. For detailed warranty information, technical support, and access to the latest datasheets and resources, please visit the official EBYTE web사이트를 방문하거나 지원팀에 문의하세요.
제조업체: 이바이트
공식적인 Web대지: http://www.cdebyte.com/
지원 이메일: 서비스@cdebyte.com
