Raspberry Pi Single Pair Ethernet HAT Adds T1S/T1L

Raspberry Pi Gets Industrial Single Pair Ethernet HAT+ Boards

Single Pair Ethernet is one of those quietly important standards that industrial and building-automation folks have been waiting to get onto the Raspberry Pi, and as of July 13, 2026, they can. Germany's Brechel Electronic launched two HAT+ compliant expansion boards that add 10 Mbit/s Ethernet over a single twisted pair to standard Raspberry Pi single-board computers — one for multidrop bus networks, one for long-range point-to-point links.

• Two boards: BE-IIS-HPP-T1S (10BASE-T1S) and BE-IIS-HPP-T1L (10BASE-T1L), both HAT+ compliant
• T1S: Microchip LAN8651 MAC-PHY, IEEE 802.3cg multidrop, up to 8 nodes over ~25 m of shared bus — €95.54 (~$115)
• T1L: Analog Devices ADIN1110 MAC-PHY, long-reach point-to-point with galvanic isolation — €113.07 (~$135)
• Setup: A "BE-IIS" installer auto-installs Linux drivers, Device Tree overlays, and services on Raspberry Pi OS

What Is Single Pair Ethernet, and Why Put It on a Pi?

Single Pair Ethernet (SPE) carries standard Ethernet over just one twisted pair of wires instead of the usual four, which slashes cabling weight and cost and plays nicely with the two-wire field networks already common in industrial and building systems. The T1S variant, built on Microchip's LAN8651 MAC-PHY, implements the IEEE 802.3cg multidrop standard — meaning up to eight nodes can share a single ~25-meter bus, ideal for sensor networks. The T1L variant uses Analog Devices' ADIN1110 MAC-PHY for longer-range point-to-point runs with galvanic isolation, a must-have where electrical safety and noise immunity matter.

The Best Part: It Just Works

Hardware is only half the battle on a Pi; drivers are the other half. Brechel bundles a BE-IIS installer that automatically installs the necessary Linux drivers, Device Tree overlays, and services on Raspberry Pi OS. After it runs, the SPE link simply shows up as a standard network interface — no kernel-compiling rabbit holes. That turnkey experience is what makes these boards genuinely useful for technology evaluation, industrial network prototyping, and educational labs, and it stacks cleanly thanks to HAT+ support. It is the same maker-friendly philosophy behind other recent Raspberry Pi expansion projects we have covered.

Who Should Care

If you are prototyping industrial IoT, teaching networking, or bridging a Pi into an existing two-wire field bus, these boards remove a real barrier. Available via DigiKey or the company's Tindie store and shipping from Germany, they bring an open-standards, well-supported on-ramp to SPE for the enormous Raspberry Pi ecosystem. It is a small board with an outsized practical payoff — exactly the kind of pragmatic hardware we love to spotlight in our mini computers coverage.

Sources: CNX Software — July 13, 2026; Microchip 10BASE-T1S — 2026.