Boardoza BME688 Environmental Sensor Breakout Board

The Boardoza BME688 Breakout Board is a compact environmental sensing solution built around the Bosch Sensortec BME688 4-in-1 sensor. It combines gas, barometric pressure, temperature, and relative humidity sensing into a single device while offering high accuracy, fast response times, and low power consumption. The integrated gas sensor is capable of detecting a wide variety of Volatile Organic Compounds (VOCs) and Volatile Sulfur Compounds (VSCs) when combined with Bosch's AI software ecosystem.

Designed for both hobbyists and professional developers, the board supports I²C (default) and SPI communication, making it compatible with a wide range of microcontrollers and embedded systems. It is ideal for air quality monitoring, smart home automation, HVAC(Heating, Ventilation and Air Conditioning) systems, weather stations, indoor environmental monitoring, industrial sensing, food freshness detection, and AI-powered gas classification applications using Bosch BME AI-Studio.

Front Side	Back Side

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Key Features

• 4-in-1 Environmental Sensing: Measures gas, barometric pressure, relative humidity, and temperature using the Bosch Sensortec BME688 sensor.
• AI-Powered Gas Classification: Compatible with Bosch BME AI-Studio for training custom gas detection and classification algorithms.
• VOC and VSC Detection: Detects Volatile Organic Compounds (VOCs), Volatile Sulfur Compounds (VSCs), smells, and various gas mixtures.
• Dual Communication Interface: Supports I²C communication by default and selectable SPI communication.
• 3.3V and 5V System Compatibility: Designed for easy integration with commonly used microcontrollers and development boards.
• Low-Power Operation: Suitable for battery-powered and continuously operating environmental monitoring systems.
• Wide Application Range: Suitable for indoor air-quality monitoring, HVAC systems, weather stations, smart-home applications, odor detection, and food-freshness analysis.

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Technical Specifications

Model: BME688
Manufacturer: Boardoza
Manufacturer IC: Bosch Sensortec
Functions: Gas Sensor, Barometric Pressure Sensor, Temperature Sensor, Relative Humidity Sensor
Supply Voltage: 3.3V – 5V DC
Logic Voltage: 3.3V / 5V Compatible
Communication Interface: I²C (Default) / SPI (Selectable)
Pressure Range: 300 – 1100 hPa
Humidity Range: 0 – 100% RH
Gas Detection: VOCs, VSCs and various gas mixtures (AI classification supported)
Temperature Range: -40°C to +85°C
Board Dimensions: 20mm × 20mm

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Board Pinout

( J1 ) Communication Connector

Pin Number	Pin Name	Description
1	VCC	Power Supply Input (3.3V–5V)
2	nCSB	SPI Chip Select (Active Low, not 5V tolerant when used directly by sensor)
3	SDA / MOSI	I²C Serial Data / SPI MOSI
4	SCL / SCK	I²C Serial Clock / SPI Clock
5	ADR / MISO	I²C Address Select / SPI MISO
6	GND	Ground

Note: The board operates in I²C mode by default. To enable SPI communication, short the JP1 solder jumper or externally pull the nCSB pin LOW.

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Board Dimensions

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Step Files

Boardoza BME688.step

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Datasheet

BME688 Datasheet.pdf
TLV73333PDBVR Datasheet.pdf

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Version History

• V1.0.0 - Initial Release

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Support

• If you have any questions or need support, please contact [email protected]

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License

This repository contains both hardware and software components:

Hardware Design

All hardware design files are licensed under Creative Commons Attribution-ShareAlike 4.0 International License.

Software/Firmware

All software and firmware are licensed under BSD 3-Clause License.