E28-2G4M27SX RF Transceiver Module Overview
The E28-2G4M27SX is a 2.4GHz LoRa RF transceiver module based on Semtech's SX1281 chip, featuring 500mW (27dBm) transmit power, SPI interface, and ultra-low current consumption in sleep mode for extended-range IoT applications up to 8km.
Key Features
- High-Power Transmission: 27dBm (500mW) output power for long-range communication
- Ultra-Low Power Consumption: Extremely low current in sleep/power-saving modes
- Industrial-Grade Stability: 52MHz precision oscillator with low temperature drift
- Long-Distance Capability: Up to 8km line-of-sight communication range
- Compact SMD Design: Miniature 15×20mm footprint for space-constrained applications
- SPI Interface: Standard serial peripheral interface for easy MCU integration
- Robust Performance: Stable operation in industrial environments
- Lightweight Construction: Only 1.5g ±0.1g for portable applications
Technical Specifications
- RF Chip: Semtech SX1281
- Frequency Band: 2.4GHz ISM
- Transmit Power: 27dBm (500mW)
- Communication Range: Up to 8km (line-of-sight)
- Interface: SPI (Serial Peripheral Interface)
- Dimensions: 15×20mm (L×W)
- Weight: 1.5g ±0.1g
- Pin Spacing: 1.27mm
- Crystal Oscillator: 52MHz industrial-grade precision
- Modulation: LoRa, FLRC, GFSK
- Package Type: Surface Mount Device (SMD)
Application Scenarios
- Industrial IoT Networks: Long-range sensor data collection in manufacturing facilities
- Smart Agriculture: Field monitoring across large agricultural areas
- Urban Infrastructure: Smart city applications including utility monitoring
- Environmental Monitoring: Remote weather stations and ecological research
- Asset Tracking: Logistics and supply chain management solutions
- Security Systems: Perimeter monitoring and alarm systems
- Energy Management: Smart grid and renewable energy installations
- Drone Communications: Long-range telemetry and control links
Power Management
- Ultra-low current sleep modes
- Advanced power-saving algorithms
- Configurable power states
- Wake-on-radio capability
Performance Characteristics
- High receiver sensitivity (-132dBm)
- Excellent interference immunity
- Stable performance across temperature variations
- Fast wake-up and transition times
- Robust signal penetration capabilities
Design Advantages
- Simplified RF design implementation
- Minimal external components required
- Pre-certified RF module reduces compliance testing
- Compatible with automated assembly processes
- Optimized antenna matching circuitry
| RF parameters | value | Remark |
| Working frequency | 2400~2500 MHz |
Supports ISM bands |
| Transmit power | 27 dBm |
Maximum power (about 500mW) |
| Receive sensitivity | -132 dBm |
Airspeed 595kbps |
| Air speed |
LoRa(bps)：0.595k~253.9k FLRC(bps)：260k~1.3M GFSK(bps)：125k~2M |
User programmable customization |
| Measured distance | 8000米 |
Clear sky, antenna gain 5dBi, antenna height 2.5m, airspeed 1kbps |
| Electrical parameters | Min | Typ | Max | Unit | Remark |
| Working voltage | 2.5 | 3.3 | 3.6 | V | ≥3.3V can guarantee output power |
| Communication level | - | 3.3 | - | V | Risk of burnout with 5V TTL |
| Emission current |
- | 580 | - | mA | Instantaneous power consumption |
| Receive current | - |
14.5 | - |
mA |
- |
| Sleep current | - | 2.0 | - | μA | software shutdown |
|
Working temperature |
-40 | - |
+85 | ℃ | Industrial grade design |
|
Working humidity |
10 | 60 |
90 | % | - |
|
Storage temperature |
-40 | 20 |
+125 | ℃ | - |
| Hardware parameters | value | Remark |
| Dimensions | 20 * 15 mm |
- |
| Antenna Interface | IPEX/PCB |
Equivalent impedance is about 50Ω |
| Communication Interface | SPI |
0～10Mbps |
| Packaging Method | SMD |
- |
