EByte E220-400M33S LLCC68 433/470MHz LoRa Module

The module uses a standard 3.3V logic level SPI interface (MOSI, MISO, SCK, NSS) for all communication and configuration. It is compatible with common MCUs like STM32, ESP32, Arduino (via level shifting), and Raspberry Pi. Ensure your host provides 3.3V logic levels; a level shifter is required for 5V Arduino boards. The SPI data rate is configurable up to 10Mbps.

Frequency and power settings are configured via SPI register writes. You must send specific AT-style commands or directly write to the module's internal registers using a provided library (like RadioLib or custom driver). The operating frequency can be set anywhere within the 410-493MHz band, and transmit power is adjustable up to 33dBm. Always consult the EByte datasheet for the exact register map and command structure.

Use a 50-ohm antenna tuned for your target frequency (433MHz or 470MHz). The module provides a stamp hole pad footprint for direct soldering of a wire antenna or an optional IPEX connector for attaching a pigtail. For optimal range, a properly matched external antenna (e.g., a 1/4 wave whip) is recommended. Ensure the antenna impedance is 50 ohms to prevent RF reflection and power loss.

To achieve the full 33dBm (2W) output, a stable 5V supply capable of delivering at least 1.2A peak current is mandatory. The module can operate from 3V to 5.5V, but transmit power scales with voltage. For battery-powered projects, consider using a 3.7V LiPo with a boost converter to 5V for maximum power, or accept reduced output at lower voltages to conserve energy.