SKU: IOWC-1760
📋 GST Invoice Available

SX1278 LoRa Ra-02 Module 433MHz Spread Spectrum Transceiver

₹489.00 (Inclusive of all taxes)
Out of Stock

The SX1278 LoRa Ra-02 module is a long-range, low-power wireless transceiver operating in the 433MHz ISM band, based on Semtech’s SX1278 chip. It features LoRa spread spectrum modulation for robust communication up to 10km and is interfaced via SPI for integration into Arduino, ESP32, or Raspberry Pi projects.

Features

  • Long-range LoRa communication up to 10km with +20dBm (100mW) output power and -148dBm high sensitivity.
  • Multi-modulation support for FSK, GFSK, MSK, GMSK, LoRa, and OOK, programmable via SPI interface.
  • Low power operation with 2.5-3.7V supply range and air-wakeup function for battery-powered IoT nodes.
  • Robust RF performance with 127dB dynamic RSSI range, automatic signal detection, and CRC packet engine.
  • Compact SMD footprint with IPEX antenna connector and shielded metal case for stable deployment.

Out of stock

Description

The SX1278 LoRa Ra-02 module is a dedicated wireless transceiver designed for long-range, low-data-rate IoT communication. Built around the proven Semtech SX1278 RF IC, it implements LoRa spread spectrum modulation to achieve exceptional link budget and interference immunity, making it ideal for challenging urban and rural environments. The module operates in the 433MHz frequency band, offering a balance of range and antenna size.

Communication is handled via a half-duplex SPI interface, allowing for direct connection to microcontrollers like STM32, ESP32, or ATmega328P (Arduino). Its integrated packet engine with CRC supports reliable data frames up to 256 bytes. The module’s shielded metal housing ensures stable RF performance and protects against external noise, while the IPEX connector allows for the attachment of external antennas to optimize range for specific deployments.

Key Features

  • Semtech SX1278-based LoRa transceiver with patented spread spectrum modulation.
  • Extended communication range up to 10,000 meters in line-of-sight conditions.
  • Superior interference rejection and selective blocking immunity compared to traditional FSK.
  • Ultra-low power consumption with programmable air-wakeup (CAD mode) for battery-operated sensors.
  • Integrated high-performance packet engine with hardware CRC for reliable data integrity.
  • Compact, shielded SMD package with dual-row stamp-hole pins for secure mounting.
  • Wide operating voltage range from 2.5V to 3.7V, compatible with Li-ion batteries.
  • Supports automatic RF signal detection, channel activity detection (CAD), and fast AFC.

Applications

  • Smart meter reading and automatic utility metering (AMR) systems.
  • Long-range environmental sensors for agriculture (soil moisture, weather stations).
  • Industrial telemetry and wireless SCADA for remote monitoring.
  • Smart home automation and security (intrusion alarms, door sensors).
  • Asset tracking and logistics management in wide-area networks.
  • LoRaWAN gateway nodes and private network end-devices.

Technical Specifications

RF Transceiver ICSemtech SX1278
Wireless ProtocolLoRa, FSK, GFSK, MSK, GMSK, OOK
Frequency Range410 - 525 MHz (433MHz ISM band)
RF Output PowerUp to +20 dBm (100mW)
Receiver SensitivityDown to -148 dBm (LoRa mode)
Supply Voltage2.5 - 3.7 VDC
Data Rate (LoRa)Programmable up to 300 kbps
Communication InterfaceHalf-duplex SPI
Antenna ConnectorIPEX (U.FL)
Operating Temperature-10°C to +65°C
DimensionsApprox. 16mm x 16mm (SMD package)

Frequently Asked Questions

How do I connect the SX1278 Ra-02 module to an Arduino Uno?

Connect the module's SPI pins (SCK, MISO, MOSI, NSS) to the Arduino's corresponding SPI pins (D13, D12, D11, D10). Provide 3.3V power to VCC and GND to ground. Use a library like RadioHead or LoRa by Sandeep Mistry. Ensure you define the correct NSS pin and reset pin (if used) in your sketch. The module operates at 3.3V logic levels, so no level shifter is needed for 3.3V Arduino boards.

What is the typical current consumption during transmission and sleep?

At maximum output power (+20 dBm), the transmit current can reach approximately 120mA. In receive mode, current consumption is around 10-15mA. The module supports low-power sleep modes via its built-in CAD (Channel Activity Detection) and air-wakeup functions, where sleep current can drop to a few microamps, depending on your microcontroller's management of the module's DIO0 and DIO1 pins for wake-up interrupts.

Can I change the operating frequency of the Ra-02 module?

Yes, the operating frequency is software-configurable via the SPI interface within its 410-525 MHz range. You must program the SX1278's RF frequency registers (Frfb) using your microcontroller code. Ensure your selected frequency complies with local ISM band regulations (e.g., 433.05-434.79 MHz in EU, 902-928 MHz in US requires an 915MHz variant). Always pair it with an antenna tuned to your chosen frequency for optimal performance.

Package Includes

  • 1 x SX1278 LoRa Ra-02 Wireless Module

Additional Information

Weight 0.003 kg
Dimensions 10 × 7 × 1 cm