QWIIC-based modular sensors and actuators eliminate breadboarding, letting makers build long-range IoT prototypes in minutes instead of hours.
Arduino has launched a new line of plug-and-play modules called Modulino that dramatically simplify building sensor networks. Instead of wiring individual components on a breadboard, each Modulino module connects over a single I2C cable using the QWIIC standard — making prototyping as easy as stacking Lego bricks.
The initial lineup covers the most common needs in embedded projects: a distance sensor, a temperature and humidity sensor (Thermo), a motion detector (PIR), a rotary encoder with push button (Knob), a buzzer module, an LED ring, and a button array. Each module is preassembled in a compact housing with a QWIIC connector, so no soldering, crimping, or level-shifting is required. The ecosystem also includes a Hub, Extender, and Motors module for larger builds.
Traditional sensor prototyping requires managing pull-up resistors, voltage compatibility, and pin mapping. The QWIIC standard — a 4-pin JST connector carrying I2C signals, 3.3V, and ground — removes all of that. Users plug a QWIIC cable from the Arduino board to a Modulino module, and the I2C address is automatically detected. The Arduino Plug and Make Kit, which bundles seven Modulino nodes, can have a working sensor network running in under five minutes.
The Modulino ecosystem is designed for both education and professional use. Teachers can run classroom IoT workshops without debugging wiring errors. Professionals building long-range environmental monitoring stations can prototype a sensor array in one session and deploy the same code to production hardware. The modules support Arduino UNO R4 WiFi, Nano boards, and the new Arduino UNO Q, making them compatible with the most popular boards in the ecosystem.