BME680 ESP Board

A compact carrier PCB (36.5 × 25 mm) that connects a BME680 environmental sensor module to a Seeed Studio XIAO ESP32C6, with optional battery power support.

Features

• BME680 sensor module socket (I²C: SDA/SCL, plus SDO/CS for address/SPI selection)
• Dual 7-pin headers (J2, J3) for XIAO ESP32C6
• 2-pin screw terminal (J4) for external power input
• Battery pad connector (BAT_PAD1)
• 200 kΩ voltage divider (R1, R2) for battery level monitoring via ADC

Files

File	Description
bme680-espboard.kicad_sch	Schematic
bme680-espboard.kicad_pcb	PCB layout
bme680-espboard.csv	Bill of Materials
bme680-espboard-fabfiles/	Gerber & drill files for fabrication
bme680-espboard-fabfiles.zip	Zipped fab files

Bill of Materials

Ref	Value	Description
J1	Conn_01x06_Socket	BME680 module connector (6-pin horizontal)
J2, J3	Conn_01x07_Socket	XIAO ESP32C6 headers (7-pin vertical, ×2)
J4	Screw_Terminal_01x02	External power screw terminal
BAT_PAD1	Conn_01x02_Pin	Battery pad header
R1, R2	200 kΩ	Battery voltage divider

Power

• 3.3 V supplied by the XIAO ESP32C6
• VBUS (5 V USB) available on headers
• V_BAT monitored through R1/R2 voltage divider → ESP32C6 ADC pin

Toolchain

Designed with KiCad 10.