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LoRa SX1278 433MHz Wireless Transceiver Module (SPI Interface)

Name: LoRa SX1278 433MHz Wireless Transceiver Module (SPI Interface)
Brand: K-TECHNICS
Availability: OutOfStock

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The LoRa SX1278 433MHz Wireless Module (often recognized in the popular Ra-02 form factor) is a high-performance radio transceiver built around the Semtech SX1278 chipset. Designed to operate in the 433MHz ISM band, this module leverages advanced LoRa (Long Range) Chirp Spread Spectrum (CSS) modulation. This technology allows the module to achieve a phenomenal balance: it can transmit data over vast distances (up to 10 kilometers with clear line-of-sight) while maintaining an ultra-low power profile that makes it perfect for battery-operated deployments.

Unlike standard FSK or Wi-Fi modules, the SX1278 boasts a staggering receiver sensitivity of down to -148 dBm. This means it can pick up incredibly weak signals hidden deep beneath the noise floor, giving it unparalleled resistance to RF interference and the physical ability to punch through dense concrete walls, forest canopies, and urban sprawl. Communicating with microcontrollers via a standard SPI interface, it grants developers absolute control over bandwidth, spreading factors, and error correction rates.

Key Features & Functional Advantages:

Chirp Spread Spectrum (CSS): Outperforms traditional FSK/OOK modulation by spreading the signal across a wider bandwidth, dramatically increasing range and making the transmission virtually immune to standard radio jamming and interference.
Exceptional Link Budget: Combines a high transmission power capability (+20dBm / 100mW) with extreme receiver sensitivity (-148dBm) to create an industry-leading link budget, ensuring data delivery where other modules fail.
Low-Power Efficiency: Features ultra-low standby and sleep currents (as low as 0.2µA), allowing remote sensor nodes to run for months or even years on a single coin cell or 18650 lithium battery.
Flexible SPI Control: Interfaces directly with the SPI pins of an Arduino, ESP32, or Raspberry Pi, allowing you to dynamically adjust frequencies, power outputs, and packet handling via software libraries.
Multi-Modulation Support: While optimized for LoRa, the internal radio can also fall back to standard FSK, GFSK, MSK, and OOK modulation for backward compatibility with legacy wireless systems.

Perfect For:

Smart Agriculture & Telemetry: Deploy soil moisture, temperature, and weather sensors across hundreds of acres of farmland without needing a cellular connection or Wi-Fi coverage.
Urban IoT Networks: Build custom smart-city infrastructure, such as remote water meter readers, parking sensors, or street lighting controllers that reliably communicate through heavy building infrastructure.
DIY Home Automation: Create impenetrable, long-range wireless links for security alarms, automatic gate openers, and garage door monitors that standard RF 433MHz modules cannot reach.
UAV & Robotics: Transmit critical flight telemetry and GPS coordinates back to a ground control station from custom drones or high-altitude weather balloons.

Technical Specifications:

RF Chipset: Semtech SX1278
Operating Frequency: 433MHz ISM Band (Tunable from 410MHz to 525MHz)
Modulation Techniques: LoRa CSS, FSK, GFSK, MSK, GMSK, OOK
Operating Voltage: 1.8V to 3.7V DC (Strictly 3.3V Logic; connecting 5V directly to the data pins or VCC will instantly destroy the module)
Maximum Output Power: +20 dBm (approx. 100mW)
Receiver Sensitivity: Down to -148 dBm
Communication Interface: SPI (Serial Peripheral Interface)
Data Transfer Rate: Up to 300 kbps (FSK) / 37.5 kbps (LoRa)
Antenna Connection: IPEX / U.FL connector or direct solder hole for a spring/wire antenna (Antenna must be attached prior to powering on to prevent amplifier damage)