EByte E80-400M2213S LR1121 Dual-Band LoRa Module 433/868/915/2.4G SPI

Connect the module's SPI pins (MOSI, MISO, SCK, CS) to corresponding GPIOs on the ESP32. Ensure the ESP32's VCC (3.3V) and GND are properly connected to the module's supply pins. You will need to install a LoRa library like RadioLib or the Sandeep Mistry library in the Arduino IDE. Configure the library to use the LR1121 chipset and define the correct CS, DIO0, and RESET pins in your sketch. The SPI bus speed should be set within the module's specifications, typically up to 10 MHz.

The Surface-Mount Device Temperature Compensated Crystal Oscillator (SMD TCXO) provides a highly stable clock reference for the LoRa transceiver's RF synthesizer. Unlike a standard crystal, the TCXO actively compensates for frequency drift caused by temperature changes. This results in more accurate carrier frequency generation, which is critical for maintaining a stable communication link, meeting regulatory channel masks, and achieving maximum receiver sensitivity over a wide industrial temperature range, typically from -40°C to +85°C.

Yes, you can solder a wire antenna or a u.FL pigtail cable directly to the IPEX stamp hole footprint on the PCB. For a wire antenna, calculate the length for your target frequency (e.g., 433 MHz or 868 MHz) and solder it to the RF pad, ensuring a solid ground connection on the adjacent pad. For best performance and to avoid damaging the pad with repeated connections, it is recommended to solder a u.FL connector pigtail. Ensure you use a 50-ohm coaxial cable and keep the exposed center conductor as short as possible to minimize impedance mismatch and signal loss.

Current consumption depends on the configured output power and frequency band. For the LR1121 chipset at maximum output power (typically +22 dBm on Sub-GHz bands), the transmit current can be around 120-140 mA. In receive mode, the current is significantly lower, typically in the range of 10-15 mA. The module supports various low-power sleep modes where current can drop to microamp levels, which is essential for battery-powered applications. Always consult the LR1121 datasheet for precise current figures based on your specific configuration of spreading factor, bandwidth, and output power.