Arduino's New Modulino Modules Make I2C Builds Bigger and Stress-Free
Arduino launched three Modulino modules in late June 2026 — a Hub for up to 64 I2C devices, a 30-meter Extender, and a Motors driver — starting at $8.85.
Three Small Boards That Solve Real Maker Headaches
Sometimes the most useful hardware is not the flashiest — it is the part that quietly removes a recurring annoyance. In late June 2026, Arduino announced three new Modulino modules that do exactly that for anyone building with I2C and the QWIIC connector standard. They are cheap, plug-and-play, and aimed at the moment your project outgrows a single sensor.
The Modulino Hub: Goodbye, Address Conflicts
If you have ever tried to wire up several identical sensors on one I2C bus, you have met the dreaded address conflict — two devices insisting on the same address and neither one working. The Modulino Hub ($8.85) fixes this with an 8-channel I2C switch (the TI TCA9548A) and ten QWIIC connectors. Because the hubs are daisy-chainable, you can fan out to address up to 64 I2C devices from a single bus, sidestepping conflicts entirely. For a sensor-heavy robot or a home-automation rig, that is the difference between a clean build and a rat's nest of workarounds.
The Modulino Extender: 30 Meters of Reach
The Modulino Extender ($11.93) tackles the other classic I2C limitation: distance. The protocol was designed for short, on-board hops, and signals degrade quickly over long wires. Using a single LTC4311 accelerator chip, the Extender pushes a reliable I2C connection out to 30 meters over Cat5e or Cat6 cable at 100 kHz — and it needs no special library to do it. Plug it in and your sensor can live across the room or out in the garden while the single-board computer or microcontroller stays at the bench.
The Modulino Motors: Movement Made Simple
Rounding out the trio is a Modulino Motors module that drives two DC motors or a single stepper, giving makers an easy, standardized way to add movement to a build. Like its siblings, it speaks QWIIC and slots into the same tidy ecosystem.
Built for Beginners, Useful for Everyone
All three are designed to work smoothly with boards like the Arduino UNO R4 WiFi and the newer UNO Q, and the whole point is to lower friction. Arduino's framing for the launch — bigger ideas without the added stress — captures it well. These are not modules that demand you learn a new toolchain; they are modules that let you scale a project you already understand.
That is what I love about well-made maker hardware. A $9 board that erases an entire category of debugging frustration does more for the hobby than another spec-sheet record. By making I2C expansion approachable, Arduino is quietly nudging more first-time builders toward the ambitious projects they might otherwise have abandoned at the first address conflict. For the maker community, that is a genuine win.
Sources: CNX Software — "Arduino Modulino Hub & Extender modules support 64 I2C devices, 30-meter range" — June 28, 2026; Arduino Blog — "Three new Arduino Modulino modules are here" — June 26, 2026.