BME680 / BNO055 Breakout Board

1. Description

BME680 / BNO055 Breakout Board contains an air quality and an inertial sensor. Both use I²C for communication with an MCU.

From left to right the connections are

3.3V

positive 3.3V supply (not 5V tolerant!)

GND

negative supply

SDA

I²C data

SCL

I²C clock

nRES

BNO055 reset. See datasheet; leave open if not used.

INT

BNO055 interrupt. See datasheet; leave open if not used.

Figure 1. Circuit diagram

Figure 2. PCB layout

Schematic
Board
Cam files:
- Eagle cam processor (File menu), sparkfun-gerb274x.cam
- Centroid files (mountsmd.ulp)
Bill of materials

Leadfree solderpaste,
Template from OshStencils
Tutorial, Youtube
Reflow with Controleo3, standard recipe
Placement of BNO055 is surprisingly forgiving, nudging into center of silk screen frame still results in good connection (had “100% yield” on 2 parts)