SparkFun's open standard to make prototyping with I2C as simple as possible.


Leave the breadboard behind and utilize a 4-pin JST connector to quickly interface development boards with sensors, LCDs, relays and more.

See Qwiic Products

Benefits of the Qwiic Connect System


The Qwiic Connect System is designed to keep your projects moving.

no soldering

no soldering

Qwiic cables (4-pin JST) plug easily from development boards to sensors, shields, accessory boards and more, making easy work of setting up a new prototype.

polarized connector

There's no need to worry about accidentally swapping the SDA and SCL wires on your breadboard. The Qwiic connector is polarized so you know you’ll have it wired correctly every time, right from the start.

daisy chain-able

It’s time to leverage the power of the I2C bus! Most Qwiic boards will have two or more connectors on them, allowing multiple devices to be connected.

Small projects require small solutions.

Introducing Qwiic Micro, our smallest boards yet.

Each Qwiic Micro board includes one Qwiic Connector as well as a single standoff hole which reduces the size of a normal Qwiic board by more than a third. Qwiic Micro boards measure in a minuscule 0.75in. x 0.30in (19.05mm x 7.62mm).

See Qwiic Micro Boards

Qwiic Line of Products


Our Qwiic line of products has grown to include powerful development boards, helpful shields, a vast array of sensors and much more.

Qwiic Development Boards

SparkFun RedBoard Qwiic

SparkFun RedBoard Qwiic

DEV-15123
$21.50
20
SparkFun Qwiic Pro Micro - USB-C (ATmega32U4)

SparkFun Qwiic Pro Micro - USB-C (ATmega32U4)

DEV-15795
$21.50
12
SparkFun RedBoard Plus

SparkFun RedBoard Plus

DEV-18158
$21.50
6
SparkFun Thing Plus - RP2040

SparkFun Thing Plus - RP2040

DEV-17745
$19.50
4
SparkFun OpenLog Artemis

SparkFun OpenLog Artemis

DEV-16832
$54.95
9
SparkFun Artemis Global Tracker

SparkFun Artemis Global Tracker

WRL-18712
$399.95
2
SparkFun RedBoard Artemis Nano

SparkFun RedBoard Artemis Nano

DEV-15443
$16.50
6
SparkFun RedBoard Artemis

SparkFun RedBoard Artemis

DEV-15444
$21.50
10
SparkFun Thing Plus - ESP32 WROOM (Micro-B)

SparkFun Thing Plus - ESP32 WROOM (Micro-B)

WRL-15663
$22.50
14

SparkFun Pro nRF52840 Mini - Bluetooth Development Board

DEV-15025
1
SparkFun Thing Plus - ESP32 WROOM (USB-C)

SparkFun Thing Plus - ESP32 WROOM (USB-C)

WRL-20168
$24.95
3
SparkFun Thing Plus - nRF9160

SparkFun Thing Plus - nRF9160

WRL-17354
$139.95
Alchitry Au+ FPGA Development Board (Xilinx Artix 7)

Alchitry Au+ FPGA Development Board (Xilinx Artix 7)

DEV-17514
$324.95
3
SparkFun Edge Development Board - Apollo3 Blue

SparkFun Edge Development Board - Apollo3 Blue

DEV-15170
$16.50
22

SparkFun RED-V RedBoard - SiFive RISC-V FE310 SoC

DEV-15594
8 Retired
SparkFun Thing Plus - STM32

SparkFun Thing Plus - STM32

DEV-17712
$32.50
1

Qwiic HATs, Shields, and Carrier Boards

SparkFun Qwiic HAT for Raspberry Pi

SparkFun Qwiic HAT for Raspberry Pi

DEV-14459
$6.50
5
SparkFun Auto pHAT for Raspberry Pi

SparkFun Auto pHAT for Raspberry Pi

ROB-16328
$32.50
1
SparkFun Qwiic pHAT v2.0 for Raspberry Pi

SparkFun Qwiic pHAT v2.0 for Raspberry Pi

DEV-15945
$6.95
2
SparkFun Servo pHAT for Raspberry Pi

SparkFun Servo pHAT for Raspberry Pi

DEV-15316
$11.95
5
SparkFun LTE CAT M1/NB-IoT Shield - SARA-R4

SparkFun LTE CAT M1/NB-IoT Shield - SARA-R4

CEL-14997
$90.95
7
SparkFun MicroMod Asset Tracker Carrier Board

SparkFun MicroMod Asset Tracker Carrier Board

DEV-17272
$149.95
2
SparkFun Qwiic Shield for Arduino

SparkFun Qwiic Shield for Arduino

DEV-14352
$7.50
9
SparkFun Qwiic Shield for Thing Plus

SparkFun Qwiic Shield for Thing Plus

DEV-16790
$4.95
SparkFun moto:bit - micro:bit Carrier Board (Qwiic)

SparkFun moto:bit - micro:bit Carrier Board (Qwiic)

DEV-15713
$24.95
SparkFun MicroMod GNSS Carrier Board (ZED-F9P)

SparkFun MicroMod GNSS Carrier Board (ZED-F9P)

GPS-17722
$269.95 $215.96
SparkFun Qwiic micro:bit Breakout (with Headers)

SparkFun Qwiic micro:bit Breakout (with Headers)

BOB-16446
$6.25
2
SparkFun MicroMod ATP Carrier Board

SparkFun MicroMod ATP Carrier Board

DEV-16885
$19.95
1

Qwiic Sensors

SparkFun GPS-RTK2 Board - ZED-F9P (Qwiic)

SparkFun GPS-RTK2 Board - ZED-F9P (Qwiic)

GPS-15136
$249.95 $212.46
21
SparkFun GPS-RTK-SMA Breakout - ZED-F9P (Qwiic)

SparkFun GPS-RTK-SMA Breakout - ZED-F9P (Qwiic)

GPS-16481
$249.95 $199.96
18
SparkFun GPS-RTK Board - NEO-M8P-2 (Qwiic)

SparkFun GPS-RTK Board - NEO-M8P-2 (Qwiic)

GPS-15005
$264.95 $179.95
7
SparkFun GPS Breakout - NEO-M9N, SMA (Qwiic)

SparkFun GPS Breakout - NEO-M9N, SMA (Qwiic)

GPS-17285
$74.95 $59.96
8
SparkFun Triad Spectroscopy Sensor - AS7265x (Qwiic)

SparkFun Triad Spectroscopy Sensor - AS7265x (Qwiic)

SEN-15050
$69.95
13
SparkFun Grid-EYE Infrared Array Breakout - AMG8833 (Qwiic)

SparkFun Grid-EYE Infrared Array Breakout - AMG8833 (Qwiic)

SEN-14607
$45.95
2
SparkFun IR Array Breakout - 110 Degree FOV, MLX90640 (Qwiic)

SparkFun IR Array Breakout - 110 Degree FOV, MLX90640 (Qwiic)

SEN-14843
$74.95
7
SparkFun Spectral Sensor Breakout - AS7263 NIR (Qwiic)

SparkFun Spectral Sensor Breakout - AS7263 NIR (Qwiic)

SEN-14351
$27.95
4
SparkFun Distance Sensor Breakout - 4 Meter, VL53L1X (Qwiic)

SparkFun Distance Sensor Breakout - 4 Meter, VL53L1X (Qwiic)

SEN-14722
$23.50
10
SparkFun Qwiic Mini ToF Imager - VL53L5CX

SparkFun Qwiic Mini ToF Imager - VL53L5CX

SEN-19013
$25.50
1
SparkFun Proximity Sensor Breakout - 20cm, VCNL4040 (Qwiic)

SparkFun Proximity Sensor Breakout - 20cm, VCNL4040 (Qwiic)

SEN-15177
$7.50
1
SparkFun Human Presence Sensor Breakout - AK9753 (Qwiic)

SparkFun Human Presence Sensor Breakout - AK9753 (Qwiic)

SEN-14349
$19.95
2
SparkFun 9DoF IMU Breakout - ICM-20948 (Qwiic)

SparkFun 9DoF IMU Breakout - ICM-20948 (Qwiic)

SEN-15335
$18.50
6
SparkFun 6 Degrees of Freedom Breakout - LSM6DSO (Qwiic)

SparkFun 6 Degrees of Freedom Breakout - LSM6DSO (Qwiic)

SEN-18020
$12.95
SparkFun Triple Axis Magnetometer Breakout - MLX90393 (Qwiic)

SparkFun Triple Axis Magnetometer Breakout - MLX90393 (Qwiic)

SEN-14571
$17.50
1
SparkFun Triple Axis Accelerometer Breakout - KX134 (Qwiic)

SparkFun Triple Axis Accelerometer Breakout - KX134 (Qwiic)

SEN-17589
$21.95
SparkFun Atmospheric Sensor Breakout - BME280 (Qwiic)

SparkFun Atmospheric Sensor Breakout - BME280 (Qwiic)

SEN-15440
$16.50
2
SparkFun Qwiic MicroPressure Sensor

SparkFun Qwiic MicroPressure Sensor

SEN-16476
$16.95
1
SparkFun High Precision Temperature Sensor - TMP117 (Qwiic)

SparkFun High Precision Temperature Sensor - TMP117 (Qwiic)

SEN-15805
$14.95
5
SparkFun Environmental Sensor Breakout - BME680 (Qwiic)

SparkFun Environmental Sensor Breakout - BME680 (Qwiic)

SEN-16466
$18.95
3
SparkFun Pulse Oximeter and Heart Rate Sensor - MAX30101 & MAX32664 (Qwiic)

SparkFun Pulse Oximeter and Heart Rate Sensor - MAX30101 & MAX32664 (Qwiic)

SEN-15219
$42.95
9
SparkFun 2D Barcode Scanner Breakout

SparkFun 2D Barcode Scanner Breakout

SEN-18088
$53.50
4
SparkFun Qwiic Scale - NAU7802

SparkFun Qwiic Scale - NAU7802

SEN-15242
$16.50
10
SparkFun Cryptographic Co-Processor Breakout - ATECC608A (Qwiic)

SparkFun Cryptographic Co-Processor Breakout - ATECC608A (Qwiic)

DEV-18077
$4.95

Qwiic Accessory Boards

SparkFun 16x2 SerLCD - RGB Backlight (Qwiic)

SparkFun 16x2 SerLCD - RGB Backlight (Qwiic)

LCD-16396
$21.95
2
SparkFun Qwiic LED Stick - APA102C

SparkFun Qwiic LED Stick - APA102C

COM-18354
$10.95
4
SparkFun Qwiic Alphanumeric Display - Green

SparkFun Qwiic Alphanumeric Display - Green

COM-18566
$9.95
3
SparkFun Micro OLED Breakout (Qwiic)

SparkFun Micro OLED Breakout (Qwiic)

LCD-22495
$18.50
SparkFun Qwiic Single Relay

SparkFun Qwiic Single Relay

COM-15093
$13.95
3
SparkFun Power Delivery Board - USB-C (Qwiic)

SparkFun Power Delivery Board - USB-C (Qwiic)

DEV-15801
$26.95
6
SparkFun Qwiic Quad Relay

SparkFun Qwiic Quad Relay

COM-16566
$32.50
6
SparkFun Qwiic Dual Solid State Relay

SparkFun Qwiic Dual Solid State Relay

COM-16810
$149.95 $59.95
1
SparkFun Qwiic Twist - RGB Rotary Encoder Breakout

SparkFun Qwiic Twist - RGB Rotary Encoder Breakout

DEV-15083
$24.95
8
SparkFun Qwiic Joystick

SparkFun Qwiic Joystick

COM-15168
$11.50
3
SparkFun Qwiic Keypad - 12 Button

SparkFun Qwiic Keypad - 12 Button

COM-15290
$11.50
11
SparkFun Qwiic Button - Red LED

SparkFun Qwiic Button - Red LED

BOB-15932
$4.95
1
SparkFun Qwiic 12 Bit ADC - 4 Channel (ADS1015)

SparkFun Qwiic 12 Bit ADC - 4 Channel (ADS1015)

DEV-15334
$11.50
1
SparkFun Qwiic Motor Driver

SparkFun Qwiic Motor Driver

ROB-15451
$19.50
3
SparkFun IoT Brushless Motor Driver (ESP32 WROOM, TMC6300)

SparkFun IoT Brushless Motor Driver (ESP32 WROOM, TMC6300)

ROB-22132
$89.95
3
SparkFun Qwiic Haptic Driver - DA7280

SparkFun Qwiic Haptic Driver - DA7280

ROB-17590
$16.50
Tsunami Super WAV Trigger (Qwiic)

Tsunami Super WAV Trigger (Qwiic)

WIG-18159
$85.95
4
SparkFun Qwiic OpenLog

SparkFun Qwiic OpenLog

DEV-15164
$18.50
SparkFun Real Time Clock Module - RV-8803 (Qwiic)

SparkFun Real Time Clock Module - RV-8803 (Qwiic)

BOB-16281
$17.50
2
SparkFun Qwiic EEPROM Breakout - 512Kbit

SparkFun Qwiic EEPROM Breakout - 512Kbit

COM-18355
$4.50

Qwiic Kits

SparkFun Inventor's Kit - v4.1.2

SparkFun Inventor's Kit - v4.1.2

KIT-21301
$99.95
6
SparkFun GPS-RTK-SMA Kit

SparkFun GPS-RTK-SMA Kit

KIT-18292
$314.95
5
SparkFun Tinker Kit

SparkFun Tinker Kit

KIT-18577
$53.50
2
SparkFun LoRaSerial Kit - 915MHz (Enclosed)

SparkFun LoRaSerial Kit - 915MHz (Enclosed)

WRL-20029
$174.95
3
Experiential Robotics Platform (XRP) Kit - Beta

Experiential Robotics Platform (XRP) Kit - Beta

KIT-22230
$114.95

SparkFun JetBot AI Kit v3.0 Powered by Jetson Nano

KIT-18486
7
Experiential Robotics Platform (XRP) - DIY Kit

Experiential Robotics Platform (XRP) - DIY Kit

KIT-24045
$94.95
SparkFun Qwiic Haptic Driver Kit - DA7280

SparkFun Qwiic Haptic Driver Kit - DA7280

ROB-18247
$17.50
1
SparkFun Raspberry Pi 4 Basic Kit - 4GB

SparkFun Raspberry Pi 4 Basic Kit - 4GB

KIT-16384
$96.50
8
SparkFun Raspberry Pi 4 Basic Kit - 8GB

SparkFun Raspberry Pi 4 Basic Kit - 8GB

KIT-17980
$123.50
1
SparkFun Raspberry Pi 4 Hardware Starter Kit - 8GB

SparkFun Raspberry Pi 4 Hardware Starter Kit - 8GB

KIT-17380
$192.95
1
SparkFun Raspberry Pi 4 Basic Kit - 2GB

SparkFun Raspberry Pi 4 Basic Kit - 2GB

KIT-16383
$84.95
1

Qwiic Cables and Connectors

SparkFun Qwiic Cable Kit

SparkFun Qwiic Cable Kit

KIT-15081
$8.95
22
Qwiic Cable - 100mm

Qwiic Cable - 100mm

PRT-14427
$1.50
Flexible Qwiic Cable - 50mm

Flexible Qwiic Cable - 50mm

PRT-17260
$1.05
Qwiic Cable - Breadboard Jumper (4-pin)

Qwiic Cable - Breadboard Jumper (4-pin)

PRT-14425
$1.50
SparkFun QwiicBus - EndPoint

SparkFun QwiicBus - EndPoint

COM-16988
$11.95
7
SparkFun Qwiic Mux Breakout - 8 Channel (TCA9548A)

SparkFun Qwiic Mux Breakout - 8 Channel (TCA9548A)

BOB-16784
$12.95
10
SparkFun Qwiic Adapter

SparkFun Qwiic Adapter

DEV-14495
$1.60
5
Qwiic JST Connector - SMD 4-pin (Horizontal)

Qwiic JST Connector - SMD 4-pin (Horizontal)

PRT-14417
$0.55
1
Qwiic connected sensor

Frequently Asked Questions


Check below to answer any questions you may have about using the Qwiic Connect System.

Can I use Qwiic on my system? Can I use the name Qwiic? Can I call it a Qwiic connector? Can I use the logo on my board?

Absolutely. Just call it a Qwiic connector. It’s free! SparkFun encourages the use of Qwiic in silk on a PCB, in the schematic, and in product descriptions. Put the logo near the connector so it’s obvious what the connector is for.

The requirements to say that your board has Qwiic:

  1. SparkFun encourages the use of the Qwiic logo in silk on a PCB, in the schematic, and in product descriptions. You can download Qwiic footprints and images here:
  2. You must use the same style 4-pin connector, JST or equivalent; you may not use a 5-pin or a different size connector. This is to make all Qwiic boards and systems interoperable.
  3. Boards must be 3.3V. You may do an on-board buck or boost to get to a different voltage (1.8V or 5V, for example), but the board must have onboard translation circuitry to work at 3.3V.
  4. All cables must follow the same color scheme: black for GND, red for 3.3V, blue for SDA, yellow for SCL.
  5. For obvious compatibility reasons you must follow the same pinout: GND / 3.3V / SDA / SCL.
  6. You may have any number of Qwiic connectors on a board. We encourage having a second connector on input and output boards to support daisy-chaining, but it is not required.

Does the color of the connector matter?

No. Black is the preferred color but we understand that white is the commonly available and cheaper color. If you’re producing a small volume of boards (<100), white is great. If you’re producing a large number of boards, consider using a black connector.


Should I call it a Qwiic/Stemma connector?

Probably not. The Stemma system supports both 5V and 3.3V. Use the Qwiic nomenclature if the connector or board supports 3.3V only. Use the Qwiic/Stemma nomenclature if the connector or board supports 5V and 3.3V on the I2C bus. Pimoroni’s BME688 is a good example.


What type of Qwiic cables should be used?

There are two types: general Qwiic cables and flexible Qwiic cables. Both are adequate and compatible. We recommend flexible Qwiic interconnect cables for the best user experience.


Who is using Qwiic?


How much power can I use?

The very conservative max current on a Qwiic cable is 226mA[1]. If you want to push it, 28AWG is good for up to 1.4A for chassis wiring “isolated, unbundled wire in free air, as per the Handbook of Electronic Tables and Formulas for American Wire Gauge.” We wouldn’t recommend pushing the cables to 1.4A, but hundreds of mA should be fine.


What’s the pinout again?

All Qwiic cables have the following color scheme and arrangement:

  • Yellow = SCL
  • Blue = SDA
  • Red = 3.3V
  • Black = GND

What are the part numbers?

The Qwiic board connector is part #: SM04B-SRSS-TB(LF)(SN) or equivalent. If you plan to incorporate a Qwiic connector on your own project we generally encourage using a black connector, but any color will work.

The cable connector is part #: SHR-04V-S or equivalent. Here is an assembly drawing of Qwiic cable showing the pinout and wire colors.


What about the INT pin?

We deliberately chose four conductors to increase usability of the interconnecting cables, minimize the cost of the connectors and limit the PCB footprint. All boards with extra pin options (such as interrupts, address selection, power save mode, etc.) will have those pins broken out to 0.1" holes, so the end user can add extra connections as needed.


How far can I run the Qwiic system?

I2C stands for inter-integrated circuit, and we’ve got a tutorial dedicated to it here. The bus was designed to communicate between ICs on a printed circuit board, so it wasn’t really designed to go long distances. That said, we’ve successfully communicated with sensors and boards via I2C over 1 meter (~4 ft).

The fastest and easiest way to extend the range of your I2C communication bus is to use the Differential I2C Breakout. The breakout uses NXP’s PCA9615 IC, which converts the two default I2C signals into four differential signals, two for SCL and two for SDA. The differential signals are sent over an Ethernet cable, which attaches to the breakout through the on-board RJ-45 connectors. The differential signaling allows the I2C signals to reach distances of up to 100ft while still maintaining their signal integrity!


What about my 5V board?

We may implement a DC buck/boost board in the future, but for now Qwiic only supports 3.3V boards. Currently over 90 percent of our I2C products are 3.3V, and the technology market is accelerating this trend.


How can I connect existing SparkFun I2C Boards?

What if you already have a handful of SparkFun sensors and parts? We have been putting our standard GND/VCC/SDA/SCL pinout on all our I2C boards for many years. This makes it possible to attach a Qwiic Adapter that will get your SparkFun I2C sensor or actuator onto the Qwiic system.

Projects, Tutorials & Hookup Guides


Whether you are looking for help hooking up hardware, or you're just looking for project inspiration, take a look below. We are always trying to expand our library of projects and tutorials, so check back often or fill out the form above to be notified of new content.

Build a Qwiic Jukebox that is Toddler Approved!

March 29, 2019

Follow this tutorial to build your own custom jukebox. Note, this is designed simple and tough for use primarily with toddlers. It's also a great introduction to SparkFun's Qwiic products!

IoT Power Relay

May 21, 2018

Using the ESP32 to make a web-configured timed relay.

Displaying Your Coordinates with a GPS Module

April 30, 2019

This Arduino tutorial will teach you how to pinpoint and display your GPS coordinates with a press of a button using hardware from our Qwiic Connect System (I2C).

Qwiic Scale Hookup Guide

April 11, 2019

Create your own digital scale quickly and easily using the Qwiic Scale!