DFRobot Fermion Multifunctional Environmental Sensor (Breakout) - I2C/UART, BMP280, SHTC3, VEML7700, ML8511

The module operates strictly at 3.3V DC. The I2C and UART logic levels are also 3.3V. Applying 5V to the power or signal pins may damage the onboard sensors and MCU. For use with 5V systems like Arduino Uno, you must use a logic level converter for the communication lines and regulate the power supply to 3.3V.

The module features a mode selection switch or Jumper. Consult the DFRobot product wiki for the specific pin configuration. The provided Arduino and Python libraries include examples for both protocols. Remember to reconfigure your microcontroller's serial or I2C pins accordingly and ensure the baud rate (for UART) or I2C address is correctly set in your code.

Yes, the integrated microcontroller processes the raw pressure data from the BMP280 sensor. Using a reference SEA-level pressure (typically 1013.25 hPa), it can calculate and output altitude values. The libraries provide functions to retrieve both absolute pressure and calculated altitude, simplifying integration into drone, weather balloon, or hiking altimeter projects.

The 'Gravity' version typically comes with a standardized 3-pin or 4-pin connector compatible with DFRobot's Gravity ecosystem, aimed at plug-and-play use with their shields. The 'Fermion (Breakout)' version, like this one, is a bare PCB with standard 0.1" pitch header pins, designed for direct soldering onto a custom PCB or use on a breadboard, offering greater flexibility for embedded designs.