trmk.de · Munich · embedded engineer

Tobias R.M.K.
Meyer

For more than ten years I've built small devices that listen: to radio, to railway tracks, and now to forests. Each one hears a quieter signal than the last.

● NOW  Senior Embedded AI Engineer @ Hula Earth · owning the BIoT device, from supplier to firmware

Follow the signal

Move your pointer to tune the trace.

§ 01 · Signal chain

Three devices, each one quieter.

I like small, lean, battery-powered things that have to survive without anyone watching, and the teams that build them. On paper: B.Sc. Electrical Engineering, M.Sc. Computer Science. In practice: a decade of firmware, radios, RTOS and the system around them. Full CV

Signal 01EnOcean · 2010–2020
A wall switch sends radio rings across the room to light a lamp

Power from a single press

Intern → Software Engineer

Energy-harvesting radio switches that power themselves from the push of a finger and still get a message across the room. No battery. No wire.

Signal 02KONUX · 2020–2026
A train passes a trackside sensor and its axles show up as bursts in a vibration trace

Listening to the rails

Senior Firmware Developer → Engineering Manager

Rugged battery-powered sensors on railway infrastructure that feel every train go by. I started on the firmware and grew into leading the device team: hardware reviews, compliance, people.

Signal 03Hula Earth · since 2026
A scrolling spectrogram from 0 to 10 kilohertz where bird calls appear as bright traces

Listening to a forest

Senior Embedded AI Engineer

Self-sufficient bioacoustic sensors record ecosystems, and AI recognises species by their calls. I own the BIoT development and coordinate supplier, product and team. Getting stuff done, a full jack of all trades.

“Every problem is just a decomposition away.”

Zephyr RTOS Ultra-low power Edge AI / TinyML C C++ Python BLE LTE-M LPWAN HW/SW co-design Protocol design Certification Supplier management Team lead

§ 02 · The constraint

A decade on a coin cell

Low-power firmware is a budget. Every microamp spent asleep and every millisecond of radio comes out of a battery the size of a coin. Tune it and watch the lifetime move.

12.6years

Current draw over time on a log scale: a low sleep floor with short radio spikes

§ 03 · Off-grid channels

Away from the keyboard

Different hobbies, same habit: read the problem, respect the constraint, try again. Each channel has something to play with.

Rock · Alpine

Read the wall, then move

Bouldering is debugging with your whole body: observe, hypothesise, commit. Up in the Wetterstein and Karwendel the same habit becomes careful risk assessment. Last big one: Ortler, 3,905 m.

A bouldering wall; tap holds within reach to climb from start to top

Road · Cycle

Every metre under my own power

Isar loops for maintenance, Timmelsjoch and Stelvio for the real meditation. Longest ride so far: Munich → Vienna, 430 km in 16 h 17 min of moving time.

Strava →
Elevation profile of a sample 14 kilometre climb with a rider marker

Kitchen · Vegan

Mostly vegan, always experimenting

Plant cooking is the more interesting constraint: flavour has to be built, texture has to be earned. Signature: Mapo Tofu. Obsession: pizza dough. Build one.

Café Tobi →

A pizza you can top and bake

Viewfinder

A camera as an excuse to stand still

Mostly a side effect of the other hobbies: wildlife on travel, mountain huts, rides at dawn. Sony α7 IV, a 35 mm prime, and far too many frames.

Open the archive
Open the current photo

§ 04 · Archive

Photography

A small selection from travels — from the cloud forests of Costa Rica to the north ridge of the Zugspitze. Full sets by region on request.

Scarlet macaw in profile, bright red feathers against green foliage
Young howler monkey peering out through the leaves of a tree
Weathered alpine hut with a shingle roof on a sunny meadow, mountain ranges behind
Close-up of an iguana, head raised, against a soft blue background
Black and white shot of a vulture landing on a ruined stone wall
Blue man o' war washed up on black volcanic sand
Mount Fuji with a snow-capped peak across the lake, reeds and bare branches in the foreground
Young deer looking at the camera, forest behind
Alpine ibex stepping over rocks, snowfield behind
Snow-covered glacier summit under a deep blue sky
Rows of weathered bronze lanterns in a Japanese temple garden
Rooftops of Porto at dusk with the Dom Luís I bridge in the distance

§ 05 · Latest transmissions

From the blog

Honest build logs, including the wrong turns. Mostly Zephyr, hardware and working with AI tools.

All transmissions →