SX1278 LoRa 433MHz Wireless Module RA-02 UART Dev Board
SX1278 LoRa 433MHz Wireless Module RA-02 UART Dev Board
SX1278 LoRa 433MHz Spread Spectrum Wireless Development Board Module (RA-02, UART Interface)
Upgrade your IoT or embedded project with the SX1278 LoRa RA-02 Development Board Module — a compact, high-performance 433 MHz spread spectrum wireless module with UART/SPI interface. Designed for makers, engineers, and hobbyists who need ultra-long-range wireless communication in a small, shield-ready PCB form factor. Made in Mainland China.
Key Features
- Ultra-Long Range: Communicate up to 15 km line-of-sight with constant RF power output even as voltage fluctuates — delivers up to +20 dBm (100 mW).
- High Sensitivity: -148 dBm receiver sensitivity for reliable links in challenging environments. Half-duplex SPI communication for seamless integration.
- Versatile Modulation: Supports LoRa, FSK, GFSK, MSK, GMSK, and OOK modulation methods, offering maximum flexibility for your wireless protocol needs.
- Programmable Bit Rate: Configurable up to 300 kbps with a 127 dB RSSI dynamic range for precise link quality monitoring.
- Smart RF Features: Automatic RF signal detection, Channel Activity Detection (CAD) mode, high-speed AFC, and a built-in packet engine with CRC (up to 256 bytes).
- Compact Dual-Column Stamp Hole Patch Package: Shielded shell with external antenna connector (RA-02) for flexible antenna placement.
- UART Interface: Easy serial communication with microcontrollers such as Arduino, Raspberry Pi, ESP32, and STM32.
Specifications
| Module Type | RA-02 Development Board (with soldering pins) |
| Frequency | 433 MHz |
| Communication Interface | UART / SPI |
| Supply Voltage | 3.3 V |
| Supply Current | 0.2 A |
| TX Power | Up to +20 dBm (100 mW) |
| Sensitivity | -148 dBm |
| Max Range | ~15 km (line of sight) |
| Modulation | LoRa, FSK, GFSK, MSK, GMSK, OOK |
| PCB Material | FR4 PCB |
| Antenna | External antenna port (RA-02) |
| Country of Origin | Made in Mainland China |
What's in the Box
- 1× RA-02 SX1278 LoRa Development Board Module (with soldering pins)
Note: Other products shown in images are not included. Minor color differences may appear due to lighting and display settings. Dimensional tolerance: ±1–3 cm.
Ideal Applications
- IoT sensor networks and smart home automation
- Long-range remote monitoring and telemetry
- Agricultural and environmental data logging
- Amateur radio and RF experimentation
- Arduino, Raspberry Pi, ESP32 & STM32 projects
For more information on IoT wireless communication standards and radio frequency regulations, visit the FCC or refer to the NIST Communications Technology Laboratory for technical guidance on wireless standards.
Frequently Asked Questions
Q: What microcontrollers are compatible with the SX1278 RA-02 LoRa module?
A: The SX1278 RA-02 module is compatible with a wide range of microcontrollers including Arduino (Uno, Mega, Nano), Raspberry Pi, ESP32, ESP8266, and STM32 boards. It communicates via UART or SPI interface and operates at 3.3 V logic levels — use a logic level converter when interfacing with 5 V systems.
Q: What is the maximum communication range of this 433 MHz LoRa module?
A: Under ideal line-of-sight conditions, the SX1278 RA-02 module can achieve a wireless communication range of up to approximately 15 km. Real-world range will vary based on antenna quality, obstacles, interference, and environmental conditions.
Q: Does this module support both LoRa and FSK modulation?
A: Yes. The SX1278 chip supports multiple modulation schemes including LoRa, FSK, GFSK, MSK, GMSK, and OOK, giving you the flexibility to choose the best mode for your specific application — whether you need long-range low-power LoRa communication or faster FSK data rates.
Q: What antenna does the RA-02 module use?
A: The RA-02 variant uses an external antenna connector, allowing you to attach a compatible 433 MHz antenna for optimized range and signal strength. The antenna is not included in the package and must be purchased separately.