Prototyping with I2C has never been easier.


SparkFun's Qwiic Connect System uses 4-pin JST connectors 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
18
SparkFun Qwiic Pro Micro - USB-C (ATmega32U4)

SparkFun Qwiic Pro Micro - USB-C (ATmega32U4)

DEV-15795
$21.50
10
SparkFun Thing Plus - SAMD51

SparkFun Thing Plus - SAMD51

DEV-14713
$21.50
2
SparkFun RedBoard Turbo - SAMD21 Development Board

SparkFun RedBoard Turbo - SAMD21 Development Board

DEV-14812
$26.95
8
SparkFun RedBoard Artemis

SparkFun RedBoard Artemis

DEV-15444
$21.50
10
SparkFun RedBoard Artemis Nano

SparkFun RedBoard Artemis Nano

DEV-15443
$16.50
6
SparkFun RedBoard Artemis ATP

SparkFun RedBoard Artemis ATP

DEV-15442
$26.95
1
SparkFun Thing Plus - Artemis

SparkFun Thing Plus - Artemis

WRL-15574
$22.50
1
SparkFun Thing Plus - ESP32 WROOM (U.FL)

SparkFun Thing Plus - ESP32 WROOM (U.FL)

WRL-17381
$22.50
10
SparkFun Pro RF - LoRa, 915MHz (SAMD21)

SparkFun Pro RF - LoRa, 915MHz (SAMD21)

WRL-15836
$33.95
4

SparkFun LoRa Gateway - 1-Channel (ESP32)

WRL-18074
SparkFun Pro nRF52840 Mini - Bluetooth Development Board

SparkFun Pro nRF52840 Mini - Bluetooth Development Board

DEV-15025
$32.50
1
SparkFun RED-V RedBoard - SiFive RISC-V FE310 SoC

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

DEV-15594
$42.95
8
SparkFun RED-V Thing Plus - SiFive RISC-V FE310 SoC

SparkFun RED-V Thing Plus - SiFive RISC-V FE310 SoC

DEV-15799
$32.50
Alchitry Cu FPGA Development Board (Lattice iCE40 HX)

Alchitry Cu FPGA Development Board (Lattice iCE40 HX)

DEV-16526
$53.50
3
SparkFun Edge Development Board - Apollo3 Blue

SparkFun Edge Development Board - Apollo3 Blue

DEV-15170
$16.50
20

Qwiic HATs, Shields, and Carrier Boards

SparkFun Qwiic pHAT v2.0 for Raspberry Pi

SparkFun Qwiic pHAT v2.0 for Raspberry Pi

DEV-15945
$6.95
2

SparkFun GPS-RTK Dead Reckoning pHAT for Raspberry Pi

GPS-16475
2
SparkFun Qwiic pHAT Extension for Raspberry Pi 400

SparkFun Qwiic pHAT Extension for Raspberry Pi 400

DEV-17512
$5.50
SparkFun Auto pHAT for Raspberry Pi

SparkFun Auto pHAT for Raspberry Pi

ROB-16328
$32.50
1
SparkFun Qwiic Shield for Arduino

SparkFun Qwiic Shield for Arduino

DEV-14352
$7.50
9
SparkFun Qwiic Shield for Teensy

SparkFun Qwiic Shield for Teensy

DEV-17119
$4.25 $2.55
1
SparkFun Qwiic Shield for Thing Plus

SparkFun Qwiic Shield for Thing Plus

DEV-16790
$4.95
SparkFun Qwiic Shield for Arduino Nano

SparkFun Qwiic Shield for Arduino Nano

DEV-16789
$4.95
SparkFun MicroMod ATP Carrier Board

SparkFun MicroMod ATP Carrier Board

DEV-16885
$19.95
1
SparkFun MicroMod Data Logging Carrier Board

SparkFun MicroMod Data Logging Carrier Board

DEV-16829
$21.50
1
SparkFun MicroMod Machine Learning Carrier Board

SparkFun MicroMod Machine Learning Carrier Board

DEV-16400
$19.95
SparkFun MicroMod Input and Display Carrier Board

SparkFun MicroMod Input and Display Carrier Board

DEV-16985
$59.95
3

Qwiic Sensors

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

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

GPS-16481
$274.95
16
SparkFun GPS Breakout - NEO-M9N, U.FL (Qwiic)

SparkFun GPS Breakout - NEO-M9N, U.FL (Qwiic)

GPS-15712
$69.95
5
SparkFun GPS-RTK Dead Reckoning Breakout - ZED-F9R (Qwiic)

SparkFun GPS-RTK Dead Reckoning Breakout - ZED-F9R (Qwiic)

GPS-16344
$289.95
SparkFun GPS Breakout - NEO-M9N, SMA (Qwiic)

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

GPS-17285
$74.95
7
SparkFun Spectral Sensor Breakout - AS7262 Visible (Qwiic)

SparkFun Spectral Sensor Breakout - AS7262 Visible (Qwiic)

SEN-14347
$27.95
2
SparkFun Ambient Light Sensor - VEML6030 (Qwiic)

SparkFun Ambient Light Sensor - VEML6030 (Qwiic)

SEN-15436
$5.95
SparkFun Grid-EYE Infrared Array Breakout - AMG8833 (Qwiic)

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

SEN-14607
$45.95
2
SparkFun Triad Spectroscopy Sensor - AS7265x (Qwiic)

SparkFun Triad Spectroscopy Sensor - AS7265x (Qwiic)

SEN-15050
$69.95
8
SparkFun Qwiic Ultrasonic Distance Sensor - HC-SR04

SparkFun Qwiic Ultrasonic Distance Sensor - HC-SR04

SEN-17777
$17.95
1
SparkFun Qwiic ToF Imager - VL53L5CX

SparkFun Qwiic ToF Imager - VL53L5CX

SEN-18642
$24.95
2
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 Micro 6DoF IMU - ISM330DHCX (Qwiic)

SparkFun Micro 6DoF IMU - ISM330DHCX (Qwiic)

SEN-20176
$25.95
SparkFun Triple Axis Magnetometer Breakout - MLX90393 (Qwiic)

SparkFun Triple Axis Magnetometer Breakout - MLX90393 (Qwiic)

SEN-14571
$17.50
SparkFun Triple Axis Digital Accelerometer Breakout - ADXL313 (Qwiic)

SparkFun Triple Axis Digital Accelerometer Breakout - ADXL313 (Qwiic)

SEN-17241
$17.50
SparkFun 9DoF IMU Breakout - ICM-20948 (Qwiic)

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

SEN-15335
$18.50
6
SparkFun High Precision Temperature Sensor - TMP117 (Qwiic)

SparkFun High Precision Temperature Sensor - TMP117 (Qwiic)

SEN-15805
$14.95
4
SparkFun Qwiic MicroPressure Sensor

SparkFun Qwiic MicroPressure Sensor

SEN-16476
$16.95
1
SparkFun Qwiic Thermocouple Amplifier - MCP9600 (Screw Terminals)

SparkFun Qwiic Thermocouple Amplifier - MCP9600 (Screw Terminals)

SEN-16295
$22.50
2
SparkFun Qwiic MicroPressure Sensor

SparkFun Qwiic MicroPressure Sensor

SEN-16476
$16.95
1
SparkFun RFID Qwiic Reader

SparkFun RFID Qwiic Reader

SEN-15191
$21.50
SparkFun Pulse Oximeter and Heart Rate Sensor - MAX30101 & MAX32664 (Qwiic)

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

SEN-15219
$42.95
8
SparkFun Capacitive Touch Slider - CAP1203 (Qwiic)

SparkFun Capacitive Touch Slider - CAP1203 (Qwiic)

SEN-15344
$6.50
SparkFun Qwiic Scale - NAU7802

SparkFun Qwiic Scale - NAU7802

SEN-15242
$16.50
10

Qwiic Accessory Boards

SparkFun Micro OLED Breakout (Qwiic)

LCD-14532
7
SparkFun Qwiic Alphanumeric Display - Blue

SparkFun Qwiic Alphanumeric Display - Blue

COM-16917
$9.95
1
SparkFun Qwiic OLED Display (0.91 in, 128x32)

SparkFun Qwiic OLED Display (0.91 in, 128x32)

LCD-17153
$10.95
9
SparkFun 16x2 SerLCD - RGB Text (Qwiic)

SparkFun 16x2 SerLCD - RGB Text (Qwiic)

LCD-16397
$21.50
6
SparkFun Qwiic Single Relay

SparkFun Qwiic Single Relay

COM-15093
$13.95
3
SparkFun Qwiic Quad Relay

SparkFun Qwiic Quad Relay

COM-16566
$32.50
6

SparkFun Qwiic Quad Solid State Relay Kit

KIT-16833
5
SparkFun Power Delivery Board - USB-C (Qwiic)

SparkFun Power Delivery Board - USB-C (Qwiic)

DEV-15801
$26.95
5
SparkFun Qwiic Keypad - 12 Button

SparkFun Qwiic Keypad - 12 Button

COM-15290
$11.50
10
SparkFun Qwiic Twist - RGB Rotary Encoder Breakout

SparkFun Qwiic Twist - RGB Rotary Encoder Breakout

DEV-15083
$24.95
2
SparkFun Qwiic Button - Red LED

SparkFun Qwiic Button - Red LED

BOB-15932
$4.95
1
SparkFun Qwiic Joystick

SparkFun Qwiic Joystick

COM-15168
$11.50
3
SparkFun Qwiic GPIO

SparkFun Qwiic GPIO

DEV-17047
$6.50
4
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 Qwiic Haptic Driver - DA7280

SparkFun Qwiic Haptic Driver - DA7280

ROB-17590
$16.50
SparkFun Real Time Clock Module - RV-8803 (Qwiic)

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

BOB-16281
$17.50
2
SparkFun Real Time Clock Module - RV-1805 (Qwiic)

SparkFun Real Time Clock Module - RV-1805 (Qwiic)

BOB-14558
$18.50 $8.33
4

SparkFun Qwiic MP3 Trigger

DEV-19030
2
SparkFun Qwiic OpenLog

SparkFun Qwiic OpenLog

DEV-15164
$18.50

Qwiic Kits

SparkFun Qwiic Pro Kit

KIT-15349
SparkFun Sensor Kit

SparkFun Sensor Kit

KIT-21286
$149.95
SparkFun RFID Qwiic Kit

SparkFun RFID Qwiic Kit

KIT-15209
$48.50
3

SparkFun Cryptographic Development Kit

KIT-18303
SparkFun JetBot AI Kit v3.0 Powered by Jetson Nano

SparkFun JetBot AI Kit v3.0 Powered by Jetson Nano

KIT-18486
$310.50
4
Experiential Robotics Platform (XRP) Kit - Beta

Experiential Robotics Platform (XRP) Kit - Beta

KIT-22230
$114.95
SparkFun JetBot AI Kit v3.0 (Without Jetson Nano)

SparkFun JetBot AI Kit v3.0 (Without Jetson Nano)

KIT-18487
$160.50
3
SparkFun Qwiic Haptic Driver Kit - DA7280

SparkFun Qwiic Haptic Driver Kit - DA7280

ROB-18247
$17.50
1
SparkFun Qwiic Starter Kit for Raspberry Pi

SparkFun Qwiic Starter Kit for Raspberry Pi

KIT-21285
$59.95
SparkFun Raspberry Pi 4 Desktop Kit - 8GB

SparkFun Raspberry Pi 4 Desktop Kit - 8GB

KIT-16812
$192.95
SparkFun Raspberry Pi 4 Hardware Starter Kit - 8GB

SparkFun Raspberry Pi 4 Hardware Starter Kit - 8GB

KIT-17380
$192.95
1
SparkFun Qwiic SHIM Kit for Raspberry Pi

SparkFun Qwiic SHIM Kit for Raspberry Pi

KIT-16987
$32.50

Qwiic Cables and Connectors

Flexible Qwiic Cable - 100mm

Flexible Qwiic Cable - 100mm

PRT-17259
$1.60
Flexible Qwiic Cable - Female Jumper (4-pin)

Flexible Qwiic Cable - Female Jumper (4-pin)

CAB-17261
$1.50
SparkFun Qwiic Cable Kit

SparkFun Qwiic Cable Kit

KIT-15081
$8.95
19
Qwiic Cable - Grove Adapter (100mm)

Qwiic Cable - Grove Adapter (100mm)

PRT-15109
$1.60
SparkFun QwiicBus - MidPoint

SparkFun QwiicBus - MidPoint

COM-18000
$22.50
1
SparkFun QwiicBus - EndPoint

SparkFun QwiicBus - EndPoint

COM-16988
$11.95
4
SparkFun Qwiic Mux Breakout - 8 Channel (TCA9548A)

SparkFun Qwiic Mux Breakout - 8 Channel (TCA9548A)

BOB-16784
$12.95
10
SparkFun Qwiic MultiPort

SparkFun Qwiic MultiPort

BOB-18012
$2.10
1
Qwiic connected sensor

Frequently Asked Questions


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

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!


Can I use Qwiic on my system?

Absolutely. We would be thrilled if you used a Qwiic connector on your board or product! You can use the name Qwiic without royalties or attribution.

The requirements to say that your board is Qwiic or Qwiic-Compatible:

  1. You must use a version of our registered Qwiic logo from the files provided.
  2. Download Qwiic Logos
  3. 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.
  4. 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.
  5. All cables must follow the same color scheme: black for GND, red for 3.3V, blue for SDA, yellow for SCL.
  6. For obvious compatibility reasons you must follow the same pinout: GND / 3.3V / SDA / SCL.
  7. 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.

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!