RA-02 LoRa Module (433/470MHz, SX1278, SPI) for Arduino & IoT
RA-02 LoRa Module (433/470 MHz, SX1278, SPI)
The RA-02 is a long-range LoRa transceiver module built around the Semtech SX1278 chip. It operates in the 433/470 MHz frequency bands and communicates via SPI, making it suitable for low-power, long-distance IoT applications. Its compact form factor and high sensitivity enable reliable data transmission over several kilometers in open areas.
Key Specifications
| Specification | Value |
|---|---|
| Frequency Range | 410–525 MHz (433/470 MHz typical) |
| Core IC | Semtech SX1278 |
| Interface | SPI |
| Operating Voltage | 1.8–3.6 V (3.3 V typical) |
| Output Power | Up to +20 dBm |
| Receiver Sensitivity | Down to -148 dBm |
| Range (Line-of-Sight) | Up to 10 km |
What You Can Build With This
- Remote weather station transmitting sensor data over kilometers
- Low-power agricultural sensor network for soil moisture monitoring
- GPS tracker with long-range periodic location updates
- Wireless home automation system extending beyond Wi-Fi range
Compatibility
This module works with any 3.3V microcontroller with SPI support, including Arduino Uno (via level shifters), ESP32, ESP8266, and Raspberry Pi (with proper voltage conversion). It pairs commonly with the Arduino LoRa library and can connect directly to 3.3V boards like the ESP32 without additional components.
Wiring Notes
Connect the SPI pins (MOSI, MISO, SCK, NSS) to the corresponding microcontroller pins. The DIO0 pin should be attached to a GPIO for interrupt-driven packet handling. Ensure a stable 3.3V supply and avoid long wires between the module and antenna connector to prevent signal loss.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino Uno?
Yes, but the Uno operates at 5V logic. Use a logic level converter for the SPI lines and power the RA-02 with 3.3V to avoid damage.
What antenna does it require?
The module has an IPEX connector for an external antenna. A 433/470 MHz spring or duck antenna with 50 Ohm impedance is recommended. Ensure the antenna matches your chosen frequency band.
What is the typical range in an urban area?
In dense urban environments, expect around 500 m to 2 km. Range depends on obstacles, antenna placement, and spreading factor settings.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
What you can build with this
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items