{"product_id":"ra-02-lora-module-433470mhz-sx1278-spi-for-arduino-iot","title":"RA-02 LoRa Module (433\/470MHz, SX1278, SPI) for Arduino \u0026 IoT","description":"\u003ch1\u003eRA-02 LoRa Module (433\/470 MHz, SX1278, SPI)\u003c\/h1\u003e\n\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFrequency Range\u003c\/td\u003e\n\u003ctd\u003e410–525 MHz (433\/470 MHz typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCore IC\u003c\/td\u003e\n\u003ctd\u003eSemtech SX1278\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eSPI\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e1.8–3.6 V (3.3 V typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Power\u003c\/td\u003e\n\u003ctd\u003eUp to +20 dBm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eReceiver Sensitivity\u003c\/td\u003e\n\u003ctd\u003eDown to -148 dBm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRange (Line-of-Sight)\u003c\/td\u003e\n\u003ctd\u003eUp to 10 km\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-indoor-weather-station\"\u003eRemote weather station transmitting sensor data over kilometers\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-soil-moisture-sensor-starter-kit\"\u003eLow-power agricultural sensor network for soil moisture monitoring\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/esp32-gps-tracker-kit-build-a-live-tracking-dashboard\"\u003eGPS tracker with long-range periodic location updates\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eWireless home automation system extending beyond Wi-Fi range\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis 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.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect 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.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery 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.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, 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.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat antenna does it require?\u003c\/summary\u003e\u003cp\u003eThe 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.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the typical range in an urban area?\u003c\/summary\u003e\u003cp\u003eIn dense urban environments, expect around 500 m to 2 km. Range depends on obstacles, antenna placement, and spreading factor settings.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery 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.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445050138989,"sku":"CDN-0865","price":410.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_de61e3ca-3b6d-437c-857f-0ca1bee83686.jpg?v=1781513063","url":"https:\/\/compoden.com\/products\/ra-02-lora-module-433470mhz-sx1278-spi-for-arduino-iot","provider":"Compoden","version":"1.0","type":"link"}