Environmental Sensor I2C for Raspberry Pi Pico - Waveshare WSR-20085

The Waveshare Environmental Sensor I2C for Raspberry Pi Pico (WSR-20085) is a compact board-level sensor module that provides environmental measurements over a standard I2C interface. Designed for straightforward connection to the Raspberry Pi Pico, the module is intended for embedded projects, prototyping, and educational use where small size and easy integration are required. It offers a simple way to add temperature, humidity and other common environmental sensing capabilities to IoT, hobbyist, and classroom systems.

Advantages

The module uses the I2C protocol for reliable two-wire communication with the Raspberry Pi Pico and other compatible microcontrollers, enabling multiple devices on the same bus. Its compact form factor and board-level connectors make it suitable for tight installations and breadboard or custom-board mounting. The sensor provides consistent, repeatable environmental data suitable for monitoring, data logging, and control loops in embedded systems. Standard pinout and predictable electrical characteristics simplify prototype development and code reuse across projects.

Suitable for

• IoT environmental monitoring with Raspberry Pi Pico
• Educational projects and hands-on learning with microcontrollers
• Hobbyist prototypes and proof-of-concept devices
• Data logging and basic climate control experiments

Key specifications

• Interface: I2C two-wire communication compatible with Raspberry Pi Pico
• Form factor: compact board-level module for breadboard or PCB mounting
• Measured parameters: environmental measurements including temperature and humidity (depending on onboard sensor)
• Power supply: low-voltage operation compatible with Pico logic levels
• Connectivity: standard pin header for simple wiring to microcontroller GPIO

How to use

Connect the sensor to the Raspberry Pi Pico using the I2C SDA and SCL pins, along with power (VCC) and ground. Ensure supply voltage levels match the Pico's logic to avoid level-shifting issues. In the software environment, enable I2C on the Pico and use appropriate device drivers or libraries that support the sensor's onboard chipset. Readings can be polled at regular intervals or used with interrupt-driven schemes if the specific sensor supports them. For accurate data, allow the sensor to stabilize after power-up before taking measurements.

Usage recommendations

Place the module away from direct heat sources, drafts, or condensation to obtain representative ambient measurements. When integrating into enclosures, provide adequate ventilation and avoid placing the sensor close to PCB components that generate heat. Calibrate in-situ if precise absolute accuracy is required and perform periodic checks against a reference instrument for long-term deployments.