EByte E49-400MBL-01 CMT2300A Wireless Module Testing Board w/ USB

Simply connect the board's USB port to your computer. It will enumerate as a virtual COM port. Use a serial terminal application (like PuTTY or Arduino Serial Monitor) at the appropriate baud rate (default is often 9600 or 115200) to send AT commands for configuring the CMT2300A's frequency, power, and modulation mode. No external power supply or soldering is required for basic evaluation.

For LoRa operation, you will need the CMT2300A driver libraries from EByte or the chip manufacturer. These can be integrated into the Arduino IDE or an STM32 project. The board itself acts as a USB-serial bridge to the transceiver's SPI interface. You typically write firmware for your own microcontroller that communicates via SPI with the CMT2300A on the board, using the provided libraries to handle the LoRa packet formatting and radio control.

The 400MHz version is suitable for regions where this ISM band is license-free, such as many parts of Europe. Always verify local regulations. The 900MHz variant (E49-900MBL-01) is designed for regions like North America. The two boards are functionally identical in pinout and interface, allowing you to swap them in your test setup by simply changing the frequency configuration in your software, making comparative testing straightforward.

You need two units: one configured as a transmitter and one as a receiver. Use the provided example code to send periodic test packets. Gradually increase the distance between the boards while monitoring the received signal strength indicator (RSSI) and packet success rate in the serial terminal. For accurate range testing, ensure you have proper antennas connected (if connectors are present) and conduct tests in an open, clear environment to establish a baseline performance metric.