EByte E220-900M22S LLCC68 LoRa Module 868/915MHz SPI

The module communicates exclusively via a standard 4-wire SPI interface (SCK, MOSI, MISO, NSS/CS). It uses 3.3V logic levels, making it directly compatible with most modern microcontrollers like the ESP32, STM32, Raspberry Pi Pico, and Arduino boards that operate at 3.3V. For 5V Arduino boards (Uno, Mega), a simple logic level converter is required for safe communication. The SPI interface allows full control over RF parameters via register reads and writes.

Frequency and output power are configured by writing specific values to the module's internal registers over the SPI bus. You must use the EByte-provided library or Semtech's LLCC68 driver code to set the desired frequency within the 850–930 MHz range (e.g., 868.1 MHz for EU LoRaWAN) and the transmit power level (up to +22 dBm). The configuration process typically involves initializing the SPI port, resetting the module, and then programming the appropriate register map for your region's regulations and application needs.

You can use either a 868MHz or 915MHz antenna matched to 50 ohms. The module offers two connection options: a 1st generation IPEX (U.FL) connector for external antennas or stamp holes (castellated pads) for soldering a wire or PCB trace antenna directly. For best range, use an external antenna with appropriate gain (e.g., 3 dBi whip) connected via an IPEX-to-SMA pigtail. Ensure the antenna's frequency band matches your chosen operating frequency to maintain proper VSWR and maximize RF efficiency.

The module requires a stable 3.3V DC power supply. Current consumption varies significantly with mode: during transmission at maximum power (+22 dBm), expect peaks up to 119 mA. In continuous receive mode, it draws a low 5.0 mA. For battery-operated projects, utilize the chip's built-in sleep modes to minimize average current. A well-regulated LDO or switching regulator is essential, as voltage noise can affect RF performance. Bypass capacitors placed close to the module's VCC pin are highly recommended.