BME680 — i2c address & wiring
Temp, humidity, pressure plus a VOC gas sensor — the BME280's air-quality sibling.
Key facts
BME680 at a glance
| i2c address | 0x760x77 address-selectable via pins/jumpers |
|---|---|
| Logic voltage | 3.3–5 V |
| Type | sensor |
| Part | Bosch BME680 |
| Ships with | Qwiic, STEMMA QT |
| Datasheet | Bosch BME680 — manufacturer documentation ↗ |
The chip
What the Bosch BME680 actually is
Integrated environmental sensor measuring temperature, relative humidity, barometric pressure and gas resistance using a metal-oxide (MOX) sensing element. Gas-resistance readings can feed software algorithms that estimate indoor air quality and VOC exposure — the chip does not directly measure VOC concentration or carbon dioxide.
Wiring
How to connect the BME680
The BME680 talks i2c at address 0x76 (up to 2 selectable addresses, handy when you need more than one on the same bus). It runs at 3.3–5 V, so match your host's logic level — if your host is 5 V and a board on the bus is 3.3 V-only, add a level shifter. Use the compatibility checker to confirm the exact cable for your setup.
Because the address is selectable, you can run several BME680 boards on one bus by setting each to a different address — no extra wiring beyond the shared SDA/SCL.
Wiring is the usual four: power, ground, SDA and SCL, plus pull-up resistors — almost always already fitted on the breakout. Nothing showing up? Run an i2c scan first; if the bus is silent, the 7-step checklist finds it faster than guessing.
Ecosystems
Plug-together options for the BME680
BME680 breakouts ship with Qwiic and STEMMA QT — keyed 4-pin cables carrying power, ground, SDA and SCL, so there's nothing to solder and nothing to wire backwards. Chain it to the next board and keep going.
Running a mixed bench? Those ecosystems interoperate more than their marketing suggests — see every connector pairing for the cable or adapter you need, or the standards overview for how they compare.
Go deeper
Guides covering the BME680
Alternatives
Other air quality boards
Watch the bus
Boards that clash with the BME680
These want addresses the BME680 also answers (0x76, 0x77), so they can't share a bus with it untouched. If one is address-selectable, strap it elsewhere; if not, the conflict guide covers the multiplexer and second-bus routes, and the collision roundup explains why a scan won't warn you.
Get one
Questions
BME680 i2c FAQ
What is the BME680's i2c address?
The BME680 uses 0x76 or 0x77, selected with an address pin or solder jumper on the board. If a scan turns up something unexpected, our i2c address list names the usual suspect for every address.
What voltage does the BME680 run at?
3.3–5 V logic. That range covers both 3.3 V and 5 V hosts, so it drops onto a Pi, ESP32 or Arduino without a level shifter.
Can I use two BME680s on one i2c bus?
Yes — set each one to a different address (0x76, 0x77) using its address pin or jumper, then wire both to the same SDA/SCL. That gives you up to 2 on a single bus before you need a multiplexer.
Does the BME680 work with Qwiic and STEMMA QT?
Yes — BME680 breakouts ship with Qwiic / STEMMA QT, so it plugs straight in with no soldering. Mixing ecosystems? The compatibility checker gives you the exact cable or adapter.