LoRa SX1278 Module (Ra-02) 433MHz

LoRa SX1278 Module (Ra-02) 433MHz Overview

The LoRa SX1278 Module (Ra-02) 433MHz is a high-performance LoRa transceiver based on the Semtech SX1278 chipset. Designed for ultra-long-range, low-power wireless communication, this module is ideal for Internet of Things (IoT) networks, wireless sensor networks, smart agriculture, tracking, and remote monitoring systems. It provides excellent sensitivity and robust performance in noisy RF environments.

Why choose the SX1278 433MHz LoRa module

• Optimized for long-range links and deep indoor penetration on the 433MHz band.
• Very low power consumption for battery-operated applications.
• Strong interference immunity using LoRa modulation for reliable data transfer.
• Small form factor for easy integration into embedded systems.

Key Features

• LoRa Modulation: Long-range, high interference immunity and low power use.
• Frequency: 433MHz band for improved range and penetration.
• High Sensitivity: Up to -148dBm for extended communication distance.
• Low Power: Suitable for battery-powered sensors and remote nodes.
• Secure Communication: Built-in data encryption options for safe transmission.
• SPI Interface: Simple connection to microcontrollers like Arduino, ESP32, and Raspberry Pi.
• Compact Size: 17mm x 16mm x 2.8mm for embedded designs.

Technical Specifications

• Chipset: Semtech SX1278
• Frequency Band: 433MHz
• Communication Range: Up to 10 km line-of-sight depending on environment and antenna
• Sensitivity: -148dBm
• Data Rate: 0.018 to 37.5 kbps
• Modulation: LoRa modulation (also supports FSK, GFSK, MSK, GMSK, OOK)
• Operating Voltage: 1.8V to 3.7V
• Current Consumption: Transmit: ≤120 mA, Receive: ≤10.8 mA
• Interface: SPI
• Operating Temperature: -40°C to +85°C
• Dimensions: 17 mm x 16 mm x 2.8 mm

Typical Applications

• IoT long-range networks and rural connectivity
• Smart agriculture and environmental sensing
• Asset and vehicle tracking systems
• Industrial automation and remote control
• Smart city infrastructure monitoring
• Remote data collection and telemetry

Integration and Wiring Tips

The Ra-02 module uses an SPI interface for control and data transfer. Basic integration steps:

• Connect module VCC to a stable 3.3V supply. Do not exceed 3.7V.
• Use proper MOSI, MISO, SCK, NSS (CS), and DIO pins from your microcontroller.
• Provide a common ground between the module and MCU.
• Use a proper antenna matched to 433MHz to maximize range and sensitivity.
• Consider level shifting if your microcontroller uses 5V logic.

Performance and Range Considerations

• Range depends on antenna type, antenna height, obstructions, and regulatory limits.
• In open line-of-sight conditions, ranges up to 10 km are achievable with optimized antennas.
• Urban or obstructed environments will see reduced range; adjust spreading factor and power to improve link reliability.

Benefits for IoT Projects

• Enables battery-operated sensor nodes to run for years with optimized duty cycles.
• Simple SPI interface accelerates development with popular microcontrollers and SBCs.
• Versatile modulation options allow adaptation to different regional requirements and use cases.

Compatibility

Works well with Arduino, ESP32, STM32, Raspberry Pi, and other microcontroller platforms using available LoRa libraries and drivers. Use community libraries such as RadioHead or LoRaWAN stacks for rapid development.

Ordering and Additional Notes

• Module images are for illustration only; actual product appearance may vary.
• Check local regulations for 433MHz usage and transmit power limits in your region.

Whether you are building smart agriculture sensors, asset trackers, or distributed IoT networks, the LoRa SX1278 Module (Ra-02) 433MHz delivers reliable long-range communication with low power consumption and easy MCU integration.