RA-02 LoRa Module (SX1278) – Wireless UART Serial Transceiver with Antenna (Neutral Packing)

SKU: FA1067-1-1
RF Chipset

Semtech SX1278
Operating Frequency

410MHz – 525MHz (Typical: 433MHz)
Max Transmit Power

+20dBm (100mW)
Sensitivity

-148dBm
Interface

SPI
Operating Voltage

1.8V to 3.7V (Standard: 3.3V)
Emission Current

≤ 120mA
Receiving Current

≤ 12mA
Sleep Current

≤ 2uA (Deep Sleep)
Package

SMD-16 / Neutral Industrial Packing
The RA-02 LoRa Module (SX1278) remains a premier choice for long-range wireless data transmission. This specific Neutral Packing version is designed for both individual DIY enthusiasts and business clients who require cost-effective, unbranded packaging for OEM integration or large-scale IoT deployments.
Long Product Description
The RA-02 is a high-performance wireless transceiver module based on the Semtech SX1278 chip and developed by Ai-Thinker. It operates on the 433MHz frequency and utilizes patented LoRa™ (Long Range) spread spectrum technology. This allows for communication distances exceeding 10km in line-of-sight environments, offering significantly better penetration through walls and obstacles than traditional FSK or GFSK-based modules. 
Designed for the “Internet of Things” (IoT), the RA-02 is optimized for low power consumption and high reliability. The module features an integrated IPEX (U.FL) connector, which allows for a secure and professional connection to external antennas via a pigtail cable. The “Neutral Packing” ensures that the product is delivered in standardized, anti-static protective packaging without retail branding, making it the ideal selection for bulk business purchasing, educational kits, and professional engineering projects. 
Key Features
  • LoRa™ Spread Spectrum: High sensitivity (-148dBm) and superior anti-interference capabilities for stable data transmission over extreme distances.
  • Integrated IPEX/U.FL Connector: Includes a specialized port for external high-gain antennas, providing flexibility for housing the module in metal or industrial enclosures.
  • Multi-Mode Functionality: Supports LoRa, FSK, GFSK, MSK, GMSK, and OOK modulation.
  • Low Power Consumption: Features an ultra-low sleep current (<1uA), making it perfect for battery-operated remote sensors.
  • Industrial Reliability: Built with a metal shield to reduce EMI and rated for operating temperatures from -40°C to +85°C.
  • Half-Duplex SPI Interface: Compatible with a wide range of microcontrollers including Arduino, ESP32, Raspberry Pi, and STM32
Usage Instructions
  1. Antenna Connection: Warning: You must connect an antenna to the IPEX port before powering the module. Transmitting without an antenna can cause permanent damage to the RF circuitry.
  2. Wiring: Connect the SPI bus pins (NSS, MOSI, MISO, SCK) and the Reset/DIO0 pins to your microcontroller.
  3. Power Supply: Use a stable 3.3V power source. Do not use 5V logic or power without level shifters, as it will destroy the SX1278 chip.
  4. Software Integration: Use popular libraries such as RadioLib or the LoRa library by Sandeep Mistry in the Arduino environment to configure frequency, bandwidth, and spreading factors
Q: What is the benefit of "Neutral Packing" for business customers?

Neutral packing provides a professional, unbranded appearance suitable for OEMs (Original Equipment Manufacturers) who integrate the module into their own products. It also reduces costs by eliminating unnecessary retail marketing materials, making it ideal for high-volume procurement.

Q: Can this module be used for Meshtastic networks?

Yes. The RA-02 433MHz version is highly popular for creating 433MHz Meshtastic nodes. Ensure your antenna is specifically tuned for 433MHz for optimal performance

Q: Is this module compatible with a 5V Arduino Uno?

While the VCC must be 3.3V, you also need to use logic level converters for the SPI data lines. Connecting 5V signals directly to the RA-02 SPI pins can degrade or destroy the module

Q: How far can this module actually transmit?

In a dense urban area with buildings, expect 1–3km. In an open field with high-gain antennas and a clear line of sight, ranges of 10km to 15km are achievable

Q: Does it support LoRaWAN?

Yes, the RA-02 is a LoRa-ready transceiver. It can be used as a LoRaWAN node when paired with a LoRaWAN software stack (like LMIC) and a compatible gateway.

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