Page Ideas

Status Aug 2026: ✔ = implemented (link points to the actual page — some names differ from the original plan below), ◐ = partially covered, ○ = still open.

Planned page	Status	Actual page / notes
start	✔	en (incl. documentation overview and group order)
hardware:receiver	○	board reference (ESP32-C5, versions, jumpers) still to be written
hardware:power	◐	covered in getting_started (power supply, PoE jumper) and the jumper table in faq
hardware:antennas	✔	antennas
hardware:enclosure	✔	enclosure
hardware:leds	○	LED table in faq exists but the meanings are still blank
hardware:build-your-own	○	waiting for content (the German `empfaenger_bauen` is a stub as well)
software:first-steps	✔	getting_started
software:connectivity	✔	transmission_methods
software:mobile-setup	◐	partially in getting_started (WLAN / mobile operation) and faq (USB tethering)
software:node-registration	✔	node_registration
software:mqtt	✔	mqtt (incl. topic reference)
software:home-assistant	✔	home_assistant
reception:*	✔	merged into a single page: reception (placement, interference, thermal)
c-its	✔	c-its — message types: CAM, DENM, MAPEM, SPATEM, IVIM
c-its:senders	✔	senders
sightings	◐	landing page sightings exists — per-city sub-pages (at:vienna, at:graz, de:aachen, vehicles) still open
api	○	map/data API, endpoints, data formats (`api` is still a stub)
faq	✔	faq
community:contributing	✔	contributing
community:order	◐	covered by the group order section on en

Original plan

start → Landing page (what/why, live map, links, order status)

hardware: → HARDWARE

hardware:receiver          → The OTM node (ESP32-C5 board, versions v2, jumpers)
hardware:power             → Power: USB (either port, common +5V rail) vs PoE
                             (802.3af active / passive 7–58V, jumper positions)
hardware:antennas          → Standard PCB antenna + external antenna options,
                             connector type, gain, 5.9 GHz band notes
hardware:enclosure         → 3D-printed case (ASA), bottom.stl, screws M4x12 TX20,
                             LAN grommet, weatherproof mounting
hardware:leds              → LED meanings (SYS blink states, LAN-port LEDs),
                             brightness control, disabling LEDs
hardware:build-your-own    → DIY receiver (fill empfaenger_bauen): dev-board build,
                             Gerber/BOM/CPL, PCB fab

software: → SOFTWARE & CONNECTIVITY

software:first-steps       → (migrate erste_schritte) unboxing, power + internet,
                             DHCP, minimal working setup
software:connectivity      → How to get data online: SPI-Ethernet (W5500/ENC28J60)
                             direct, USB→Raspberry Pi, USB→Android (cits-to-go),
                             FritzBox 3390, v2x2map, ESPHome/Home Assistant
software:mobile-setup      → Phone tethering: USB-Ethernet dongle + cable
                             (node cannot emulate a NIC), enable tethering AFTER
                             node is powered & linked, Android Auto use
software:node-registration → (keep) Self-Service Portal, MQTT connection string,
                             friendly name, show-on-map, heatmap
software:mqtt              → MQTT topics (its/nodeXXX/packet/json, .../stats),
                             subscribing to own node, live-stream vs buffering,
                             why C-ITS is real-time (paho-mqtt caveats)
software:home-assistant    → HA integration, sub-pub proxy / bridge pattern,
                             monitoring the node

reception: → RECEPTION & PLACEMENT

reception:optimal-placement→ Height, line-of-sight, urban vs quiet areas
reception:interference     → 5 GHz Wi-Fi AP interference near 5.9 GHz, filters,
                             vertical separation, front-end desensitisation
reception:thermal          → Heat (>60 °C reports), causes, mitigation

c-its: → C-ITS BACKGROUND (fill c-its)

c-its                      → What is C-ITS, message types (CAM, MAPEM, SPATEM…)
c-its:senders              → Which vehicles/infra send C-ITS (VW/Volvo, ASFINAG
                             retrofits, trams, Car2x traffic lights, signatures)

sightings: → SIGHTINGS / FIELD FINDINGS

sightings                      → Landing: was gehört hier rein, wie eintragen,
                                 Legende (signatur ja/nein, OBU-only, etc.)
sightings:at:vienna            → Wien: Trams (Linie 2, MAC, ZN/Kurs), Ampeln, …
sightings:at:graz              → Graz: …
sightings:de:aachen            → Aachen: …
sightings:vehicles             → Fahrzeugmodelle die senden (Audi A5, VW-Pakete,
                                 Volvo) — modellbezogen statt ortsbezogen

api: → (fill api) map/data API, endpoints, data formats

faq → FAQ (see below)

community: → CONTRIBUTING

community:contributing     → How to get edit rights, style, language policy
community:order            → Group order / Pretix, pickup (realraum Graz), shipping

FAQ:

What do the LEDs mean? (SYS blinking = no connection yet)
Does it matter which USB-C port powers it? (No — both share one +5V rail)
My phone won't do USB tethering — why? (Node can't emulate a NIC; use USB-Ethernet dongle + cable; enable tethering after the node is up)
Is there a data buffer when offline? (No — MQTT live-stream by design; only position/MAPEM are sensible cache candidates)
Which antennas can I use? (→ hardware:antennas)
Why is my node so hot? (→ reception:thermal)
Why is reception poor despite good height? (→ reception:interference — nearby 5 GHz APs)
How do I monitor my node in Home Assistant? (→ software:home-assistant)
PoE vs USB / jumper settings? (→ hardware:power)