DFRobot Screw M3x25 Low-Profile Cross-Head 10pcs - FIT0281 water quality Feature CP2102 (this board) CH340

Feature CP2102 (this board) CH340 (NodeMCU V3) Driver support Excellent on all OS — often auto-installs Good — manual driver needed on some systems Max baud rate Up to 921600 baud Up to 2 Mbaud Board size Compact (V1 form factor) Wider (V3 form factor) Cost Slightly higher More affordable Best for Plug-and-play on macOS/Linux

slim controllers 8-bit AVR / 16 MHz Native USB

Use the correct board voltage and I2C address in your code

Compared Product Best For Key Difference Direct Link TT Motor Metal Shaft Gearbox Straight Type mechanical fit and mounting Motor Metal Shaft Gearbox View product DC Geared Motor with Back Shaft Straight Type mechanical fit and mounting Geared Motor with Back View product DC Geared Motor Tank Shaft 130 mechanical fit and mounting tank View product Technical specifications

1 × Barometric Pressure Sensor BMP085 Breakout

DFRobot Screw M3x25 Low-Profile Cross-Head 10pcs - FIT0281 water quality Feature CP2102 (this board) CH340These are M3 crosshead cap screw, which provides a more secure way to install circuit boards, sensors and mechanical mounting. SPECIFICATION Screw Drive Type: cross Screw size: M3 Screw length: 25 mm