NAMING.md

★ N.I.C. ★

NIC — canonical board / front names

The rule: a board gets a name. Anything with its own PCB is a named front/module. A chip that rides on another board's PCB is just a module, not a name.

The name IS the type. A board is called what it is called, on the wire and in the documents alike — the old science labels (seismo, basic, iono, mag) are gone, because nobody should have to learn a second vocabulary to discover that "basic" meant Palatine.

The address IS the identity: TYPE«4 | NUMBER, one byte. Quake #2 is 0x52, Gauss #2 is 0x12, Pluvius #2 on ModBus is 0x16 — three units numbered 2 collide with nothing and nothing is ever translated (core/PROTOCOL.md §2).

The three buses keep separate type spaces and never share one. A module's code never appears on another bus's frame — a host converts its modules' values into its own payload as records, and a record is read in the context of the host that carried it.

NodBus — 40 B, TYPE«4 | NUMBER		mini — 16 B, TYPE«4 | NUMBER		ModBus — TYPE«2 | NUMBER
1	Mayak	1	Gauss	4	Babel, bare
2	Bifrost	2	Quark-Tubes	5	Pluvius
3	Argus	3	Pascal	6	Ceres
4	Marconi			7	Sakura
5	Quake			8..61	free — one per quantity at a position
6	Palatine
7	Tesla
8	Sputnik
9	Photon
10	reserved — Neutron
11	Positron
12	Pip
13	Steinmetz

NodBus and mini stop at 14, ModBus at 61, and for the same reason each: the packed address must land above the hand-written 0x01..0x0F and inside Modbus's legal 1..247. ModBus buys types with the two bits it does not need for instances — a type is a quantity at a position, and a plot carries twenty kinds of sensor and four of any one, where a card's list is short and closed. Gauss is mini type 1 and nothing else — its ModBus form is gone (gauss/WHY.md). Bought sensors get 0x01..0x0F, fifteen hand-written addresses against the eight a full weather station fits.

No house module is hand-written any more, and a NUMBER is unique across the STATION — never per ModBus arm, because Palatine's arms are an electrical division and not an address space.

The station's COMPOSITION lives in one small table on the MASTER, keyed by (bus, TYPE, NUMBER) — adding a unit type never means touching node firmware. Internal library/symbol names (nq-*, nw-*, nr-*) and the science terms (ionosphere, radiation, …) are separate and do not change with a board name.

How a unit attaches — NOD / MOD

Two ways to hang a unit on the network:

Class	spells	what it is	its bus	examples
NOD	Node	a unit that speaks NodBus itself	NodBus — RS-485 data + distributed clock (NIC proto, TDMA)	Quake · Palatine · Sputnik · Tesla · Pip · Steinmetz · Marconi · Photon · Positron
MOD	Modbus	a Modbus slave module, slow — its read interval is a setting, not a fixed rate	ModBus — the RS-485 Modbus-RTU leaf bus off a NOD, polled, no clock. Palatine carries the arms	Pluvius · Sakura · Ceres · Babel
mini-NOD		a unit whose measurement is 8 B and which needs the clock	NodBus mini — the same framing, TDMA and clock as NodBus, one payload wide, behind Argus	Gauss · Quark-Tubes · Pascal

The class is the bus, not the MCU — and the MCU is the H523 either way. A NOD, a MOD and a mini-NOD all carry the house H523; what a slow polled leaf does not use of it costs less than a second firmware base (MCU assignment). No unit appears in two rows — Gauss is a mini-NOD and nothing else (gauss/WHY.md).

So: a NOD sits on the NodBus, behind a Bifrost; a MOD hangs on a ModBus arm — and Palatine carries the ModBus arms — bought sensors and the slow house modules — and Argus carries the NodBus mini segments. The master (Mayak) is the head-end — and it drives the NodBus through Bifrosts: each of its four trunk UARTs is a MasterNOD link — a point-to-point, NodBus-framed, in-enclosure link head ↔ Bifrost; the NodBus proper starts behind the Bifrosts. Everything else is just a board inside a unit's enclosure — the passive tube heads inside Quark-Tubes (the GM and proportional tubes, Gadolin/Rhodion included, all counted on Quark-Tubes' own H523 on the same assembly). It is not a separate bus class.

Why the ModBus is Modbus. RS-485 Modbus RTU — chosen over I²C / I³C / 1-Wire because a differential pair shrugs off the board-to-board noise that single-ended short-range buses don't, and Modbus is universal (the cost is worth the robustness).

Board / module	Name	Directory	Senses	Reports as
Master / head-end	Mayak	mayak/	— front-agnostic: datalogger + uplink + the roster (the clock is Kronos's)	own board (ESP32-S31 head-end, NodBus type 1 Mayak) — every unit hangs off it through the Bifrosts
Station timekeeper	Kronos	kronos/	— the precision heart: GNSS-disciplined TCXO/GPSDO → the network clock (core/blocks/nodbus.md) + PPS + coarse UTC	dedicated STM32H523 clock board beside the Mayak — pure clock, not a Bifrost
Kronos's GNSS front	Polaris	kronos/polaris/	— a time-only GNSS receiver: lean NMEA + PPS to Kronos	a carrier, not a unit — a bought u-blox NEO-M8N with its own bias tee, a bought active antenna, and one Galvani data connector into Kronos's RX/TX + PPS socket — it takes 3,3 V over that connector and needs no power connector. No processor, no bus, no address, and no code of its own: it presents GNSS like the socket facing it, because the code names the interface and not the unit. Fitted where the station has no Sputnik
Longwave carriers — the SID channel, and time	Pip	tesla/pip/ — Tesla's board under its own image; held back by coverage, not shelved	the VLF/LF carrier levels (the D-region SID channel), and from the 34–120 kHz time-code stations and eLoran → PPS + date, for a site where GNSS is not available	NOD, NodBus type 12 Pip — Tesla's H7A3 board, both data bodies populated: NB IN the NodBus link, TIME OUT toward Kronos's second RX/TX + PPS socket, where it presents itself as a GNSS receiver (PPS + NMEA) and serves the socket only under Kronos's heartbeat. Tesla and Pip are one board as Bifrost and Argus are one card
Line faults on power lines	Steinmetz	tesla/steinmetz/ — Tesla's board under its own image	the mains-locked impulsive sources of a line — arc · corona · partial discharge — from a vehicle at 80–100 km/h or a static site; Tesla's 4 B event with its own four classes, the floor and the source states	NOD, NodBus type 13 Steinmetz — Tesla's H7A3 board; in a vehicle behind a Proteus over one hybrid cable
The head, the clock, a Bifrost and Hermes on one small PCB	Proteus	proteus/	— four sections on one PCB, Polaris plugged in, an LTE-M modem, one copper NodBus run on the board, an isolated DC/DC brick at the input, Ethernet and USB-C	one PCB, no type — ESP32-S31 + 3× STM32H523, each section its own document's processor and firmware
The head, the clock, two cards, Palatine and Hermes on one PCB	Mimir (mini-Heimdall)	mimir/	— six sections on one PCB: two NodBus ports, four mini segments, four arms, a spare MasterNOD, Ethernet and USB	one PCB, no type — ESP32-S31 + 5× STM32H523
BMS/MPPT converter	Hermes	hermes/	— the bought power boards' bus (485 Modbus RTU, UART, I²C, CAN) → one register block on the Mayak's LP I²C	house card, no bus type — STM32H523 at 4 or 8 MHz on the Mayak's power body, fed 3,3 V by the head, ID 0,90; not a NodBus node, not a ModBus slave
Optical bridge card	Bifrost	bifrost/	— the light-bridge: station trunk ↔ up to 4 spurs to remote units, copper or fibre (per-spur master, ranging, spur→network time mapping)	NodBus type 2 Bifrost — house STM32H523 bridge card — six USARTs of seven, one trunk with its echo receiver + four spur ports; every unit hangs behind one. The same board is Argus
Seismograph node	Quake	quake/	ground motion (MEMS + precision accel)	NOD, NodBus type 5 Quake
Base / meteo node	Palatine	palatine/ (was weather/)	temp/RH, pressure, wind, solar, UV, soil	NOD, NodBus type 6 Palatine
Weighing rain gauge	Pluvius	pluvius/	precipitation by mass (load cell + ADS1235)	MOD, ModBus type 5 Pluvius — STM32H523
Leaf-wetness sensor	Sakura	ceres/sakura/	leaf surface wetness (capacitive) + the temperature at the plate	MOD, ModBus type 7 Sakura — STM32H523
Soil-moisture sensor (WMO depths)	Ceres	ceres/	soil volumetric water (capacitive) + the soil temperature at its depth	MOD, ModBus type 6 Ceres — STM32H523 each; seated in the ground stacked in a patrona (palatine/CONSTRUCTION.md)
Magnetometer sonde	Gauss	gauss/ — standalone remote unit (garden / well / borehole / sea)	geomagnetic field (RM3100) + ground temp (TMP117/STS35 on the wall, an NTC between the coils) — magnetometer-only, no tilt (SCL3300 dropped)	mini-NOD, NodBus mini type 1 Gauss behind an Argus — a sonde is 6 B of measurement, which is a mini payload, so it never needed a 32 B slot or a Bifrost port of its own; the segment carries the clock, which is why the sonde is on it and not on ModBus. STM32H523 — one sensor board, the port board wired beside it is what changes
Universal Modbus bridge	Babel	babel/	— protocol converter: a sensor's native bus → Modbus RTU	MOD, and it has NO type of its own — STM32H523; each fitted position answers as its own slave on the type of its quantity, and 0xFF01 IDENT says they are one board; a board with nothing fitted answers once on ModBus type 4, bare (babel/MODBUS.md)
Carrier node	Argus	bifrost/argus/	— no sensor of its own: four NodBus mini segments, tiled four 8 B mini payloads to a payload and announced as ⌈minis/4⌉ NODs (bifrost/argus/README.md). A mini segment costs a whole UART — that is what TDMA charges, and it is why a polled bus keeps the fan-out advantage	NOD, NodBus type 3 Argus — the Bifrost board, STM32H523, six USARTs of seven: one NodBus upstream with its echo receiver, and four mini segments. No LPUART on a bus. Four is where the timer captures, the USARTs and the frame index meet
Pressure sonde	Pascal	pascal/	water column above it — MS5837-30BA + thermometer, in Gauss's oil-filled tube	mini-NOD, NodBus mini type 3 Pascal — STM32H523; the Tier 1 tsunami gauge where a site cannot keep a radar mast (atlantis/README.md)
HV-tube counting unit	Quark-Tubes	quark/tubes/	the tube assembly entire — three GM tubes of one type over the deposition plate — bare, β-stopped, behind Pb — and the neutron detector (Gadolin/Rhodion included), all counted on its own H523	mini-NOD, NodBus mini type 2 Quark-Tubes — on a mini segment behind Argus. Counts only, no energy — a tube delivers none — so raw tubes are normalised and subtracted on the unit into four published channels: beta · soft γ · hard γ · neutron, one uint16 each = the whole 8 B payload (quark/tubes/BUS.md). It needs the clock, and a house unit that needs the clock is not a MOD. It carries five NTCs, one on the board and one on each head, but never sends them with the counts: the correction is applied on the counts here, which makes it tier C. Quark-Tubes is not the scintillation side — that is Quark-Scintillation, Photon and Positron on the NodBus (quark/scintillation/); quark/ keeps the shared radiation physics both build on
Universal output block	Galvani	galvani/ — the doctrine home, and the only place that lists the boards	— front-end: the ONE place the network makes a voltage — puts a remote run on 48 V, or 300 V where 48 does not carry the load, carrying the hard-wired unidirectional clock pair + the data pair(s) — duplex follows the feed (NodBus or ModBus data at the insert point) so one universal module replaces per-case boards	not a sensor — the shared power/protection port board family. Eleven boards, each named by what it does — a power board makes the feed or takes it off the cable, a communication board carries the link; the class letters survive only inside a communication board's name (G-I-N-025 · G-I-M-005 · G-O-10-10 · G-O-2-100 · G-12-S; the 300 V unit boards carry their watts, G-300-U-6 and G-300-U-40), and the L/H split and the ×1/2 series are gone
GNSS / ionosphere node	Sputnik	sputnik/ (was iono/)	multi-GNSS → TEC	NOD, NodBus type 8 Sputnik
Air-quality reference (Palatine's)	Chinook	palatine/chinook/	the bought RS-485 air units — none in the base; particulates and gases fitted per site	not a board — the sensor prescription only; the units are bought Modbus slaves on Palatine's arms, each reply a block in its payload
HF ionosphere monitor	Marconi	marconi/	the F-region through fixed HF transmitters — MUF/foF2 and the passive ionogram, 0,5–16 MHz	NOD, NodBus type 4 Marconi — one board in one box: a 1 m air-core loop + LMH5401 and THS4541 + AD9265-80 direct sampling over the PSSI into internal SRAM, and the STM32H7A3IIT6 that runs the FFT; the Galvani bodies and the two 12 V terminals
Lightning node	Tesla	tesla/	sferics / lightning / TGF	NOD, NodBus type 7 Tesla — a single board in one box on the antenna frame: 3 ferrite rods (the converter's fourth channel spare) + THS4551 + ADS127L14 + the STM32H7A3IIT6 that runs its DSP; the two Galvani bodies and the two 12 V terminals. One, two or three NUMBERs: 1 the event records, 2 the source states and the floor, 8 the per-event supplement — a supplement NOD is its base's NUMBER + 7 (tesla/README.md)
Gamma unit	Photon	quark/scintillation/photon/	photons — γ + X-ray, one quantity (they differ by origin, not by energy)	two builds. Scintillation: NOD, NodBus type 9 Photon — CsI(Tl) + SiPM + PIN, sampled simultaneously, on Quark-Photon (quark/scintillation/photon/HARDWARE.md), counts and energy. Tube: GM tubes behind graded Pb, feeding Quark-Tubes' banded channels
Neutron channel, photomultiplier	Neutron	quark/scintillation/neutron/	neutron	a channel, type 10 reserved for it. The two-screen ⁶LiF/ZnS(Ag) stack read by a photomultiplier on Helion's kV source, on channel 1 of Quark-Neutron/Positron, published as two counts, thermal and epithermal, in bytes 8–11 of Positron's record, ahead of its bands — a screen and a discriminator give a count and no energy, so four bytes carry it (quark/scintillation/photon/BUS.md); a build that wants it on a NUMBER of its own takes type 10
He³ neutron head	Helion	quark/tubes/helion/	neutron	no MCU — the He³ / BF₃ proportional tube on Quark-Tubes' neutron channel K4, and the kV source it owns
Beta unit	Positron	quark/scintillation/positron/	beta, both signs — β⁻ and β⁺ ionise alike	NOD, NodBus type 11 Positron — a 25 × 25 × 25 mm plastic block + SiPM on the face, no fibre, on Quark-Neutron/Positron, the block only — the beta the tubes see is Quark-Tubes's derived K1 − K2 (quark/scintillation/positron/HARDWARE.md). One box carries the block with Neutron's screens and answers as ONE NOD — the beta record with Neutron's two counts in bytes 8–11. The one eye on Sr-90/Y-90 and Kr-85 — pure beta emitters no gamma head sees
Gd/Rh neutron detector	Gadolin (Gd) / Rhodion (Rh)	quark/tubes/gadolin/	neutron — Gd capture → γ, or Rh activation → hard β	no MCU — the 13 tubes land on Quark-Tubes' EXTI on the same assembly and Quark-Tubes merges and counts them into its neutron channel K4
Service companion (software)	Handset	mayak/handset/	— the phone at the open enclosure: who enrolled, which sensor is failing by name, GO / NO-GO, and the provisioning commands	not hardware — a phone app (Android + iOS), described and not written, on the master's button-gated BLE service
The radiation part	Quark	quark/	what is measured and the two ways it is measured — Quark-Tubes (quark/tubes/) and Quark-Scintillation (quark/scintillation/) — and the neutron physics both share (NEUTRONS.md)	not a unit and not a board — the folder and the name of the whole radiation part

Why these names

• Mayak — Russian Маяк, the lighthouse: the master is the beacon the network steers by.

• Kronos — the Titan of time: the station's timekeeper takes time from the heavens (GNSS) and hands the whole station its heartbeat (kronos/).

• Polaris — the pole star, what you take your bearing and your hour from: the card that hands Kronos the sky (kronos/polaris/).

• Pip — the pips, the six beeps of the BBC Greenwich Time Signal since 1924, and what every transmitter in the band actually sounds like: a notch cut into the carrier once a second (tesla/pip/). (Briefly "Marconi" — that name now belongs to the HF monitor, marconi/.)

• Hermes — the messenger and interpreter of the gods: the card that carries what the pack and the panel say into the head's own registers (hermes/).

• Bifrost — the Norse bridge of light, guarded by Heimdall: the card that opens the light-bridges (optical spurs) from the station to the remote units (bifrost/).

• Quake — earthquakes.

• Palatine — for the Societas Meteorologica Palatina (1780), the first standardized international weather network (the front takes the English form of the name).

• Pluvius — Latin rain (Jupiter Pluvius).

• Sakura — the Kyoto cherry-blossom record, one of the longest climate proxies.

• Ceres — Roman goddess of the harvest; soil moisture ↔ yield.

• Gauss — the Magnetischer Verein (1836): the first worldwide magnetometer network with synchronised measurement times — this network's direct ancestor. (Briefly "Magnes"; renamed.)

• Babel — the Babel fish, the universal translator: it speaks every sensor's tongue and answers in Modbus.

• Sputnik — the first satellite.

• Handset — what a lineman clips onto a pair to talk to the line; this one clips onto the station. It reads and sets, which is why it is not called a viewer.

• Chinook — the North-American warm wind: the air the station breathes. Not a board — the shared reference for the bought air-quality units.

• Tesla — Nikola Tesla: lightning.

• Marconi — the 1901 transatlantic transmission worked because of the layer this board measures; Kennelly and Heaviside proposed that layer the year after, to explain it (marconi/).

• Photon — γ and X-ray are photons.

• Helion — the He³ nucleus is literally called a helion.

• Positron — the β⁺ particle; the unit reads beta of both signs, and the TGF photonuclear chain (¹⁴N(γ,n)¹³N, β⁺) makes real positrons over thunderstorms.

• Gadolin — Johan Gadolin, namesake of gadolinium.

• Rhodion — the rhodium-activation variant of the same board (quark/tubes/gadolin/).

• Quark — neutrons are made of quarks: the radiation part as a whole. Quark-Tubes and Quark-Scintillation are its two builds.

• Galvani — Luigi Galvani: galvanic isolation is named after him — the output-board kit (galvani/). There are no class letters, no end digits and no numbers: a board is named by what it does, and the name IS its identity. Eleven boards:

  board	what it is
  G-48-S	power, source end, 48 V — the 12 V off the wire on its own terminals
  G-300-S	power, source end, 300 V
  G-48-U	power, unit, 48 V — 12 V out and nothing lower
  G-300-U-6	power, unit, 300 V, 6 W — the pod's board: a 40 mm pipe is the volume
  G-300-U-40	power, unit, 300 V, 40 W — 12 V out; a remote Argus's bus, or any load of that size (a heated unit, a camera — examples)
  G-I-N-025	communication, 485 on copper, NodBus
  G-I-M-005	communication, 485 on copper, ModBus — one transceiver, one pair
  G-O-10-10	communication, glass, 10 Mb/s
  G-O-2-100	communication, glass, 2 Mb/s — 1 m to 100 km
  G-12-S	isolated 12 V, source end — a bought ModBus device a few metres out; no unit-end partner
  G-24-S	switched 24 V, source end — on Palatine's PWR EXT, for a load that is not a sensor

  The boards carried sheet numbers through two schemes and carry none now — both schemes and their maps are in galvani/WHY.md, and why the station numbers nothing is in daedalus/WHY.md.

  A power board makes the feed or takes it off the cable; a communication board carries the link. A communication board serves both ends — the socket says which. Everything that leaves the enclosure is isolated (galvani/README.md).

(Mechanical codenames, the „Barrel" family: one pipe profile, ~40 mm class, in steps of 25 cm, and the name is the multiple — Barrel 25 cm · DoubleBarrel 50 cm · TripleBarrel 75 cm · QuadroBarrel 100 cm. Quake takes a DoubleBarrel, or a QuadroBarrel with the magnetometer; what picks the length and how a body is seated are in quake/CONSTRUCTION.md.)

Structure of the radiation detectors

Split by quantity — one quantity, one unit — and the technology is a build, the Bifrost/Argus move one level up:

• quark/ — Quark, the radiation part: what is measured and by which build, the graveyard and NEUTRONS.md, the neutron physics the three neutron heads share.
  • quark/tubes/ — Quark-Tubes, high voltage: the counting unit Quark-Tubes (mini-NOD type 2) on its one board, the GM head (HEADS.md), quark/tubes/helion/ — Helion, the He³/BF₃ head and the kV source — and quark/tubes/gadolin/ — Gadolin (Gd-capture → γ) and its Rhodion (Rh-activation → β) variant, one skeleton.
  • quark/scintillation/ — Quark-Scintillation, low voltage: the group README over its three folders.
  • quark/scintillation/photon/ — the gamma unit, scintillation NOD (type 9) on Quark-Photon; also the H7A3 layer both LV boards share, the scintillation physics, the record contract and the one firmware image.
  • quark/scintillation/positron/ — the beta unit, scintillation NOD (type 11) on Quark-Neutron/Positron; it carries Neutron's two counts too, and quark/scintillation/neutron/ is that channel — the photomultiplier and the two screens, type 10 reserved for it.

MCU assignment — right-sized

Two MCU tiers below the head (the head itself is the ESP32-S31): the H523 — every node, card and slave module — and the H7A3 DSP tier — Tesla, Marconi, and the two scintillation boards (Photon and Positron). The H523 is the slave tier too: the capacitive sensors read on a synchronous-detector front that wants a timer at 2²⁷ Hz and two differential ADCs (ceres/HARDWARE.md), the ranging return wants a fast timer on every unit (bifrost/HARDWARE.md, Ranging), and one part number across the station is one firmware base and one set of tooling (core/WHY.md, A slave-class MCU).

• STM32H523 — the station nodes (need RAM/buffers/compute; have CORDIC + FMAC):
  • Palatine — buffer memory for the meteo node and the ModBus master for the bought sensors. Radiation is not its job — Quark-Tubes counts the detector heads (its own row below).
  • Quake — seismic recomputations (filtering / STA-LTA / baseline).
  • Sputnik — memory to buffer the GNSS epoch across frames.
  • Tesla — moved to the H7A3 (the DSP tier, below).
  • Argus — six serial ports in the job, which forces the bigger body whichever part is chosen; the H523 is that body and is the MCU every other node already runs (its row below).
• STM32H523 — the sensor modules too, in LQFP100, the house footprint on every H523 (core/HARDWARE.md); two packages in the station and no more, LQFP100 for the H523 and LQFP176 for the H7A3. One part covers the whole slave job, and the same one covers the nodes:
  • Pluvius — ADS1235 over SPI + Modbus over UART + drain logic.
  • Sakura — leaf wetness: the synchronous-detector capacitive front on the timer, the FDA and the two ADCs (ceres/HARDWARE.md, the same electronics) + Modbus.
  • Ceres — soil moisture, the same front, its own electrode + Modbus.
  • Pascal — MS5837-30BA + a thermometer and nothing else.
  • Hermes — two faces: I²C slave to the Mayak, Modbus master to the BMS and the MPPT.
  • Babel — the protocol converter, one slave per fitted position.
  • Argus — six serial ports in the job forced the bigger body before the tier merged; now it is simply the house part. Argus's work is unchanged: it relays values that arrive a sample a minute.
  • Gauss — RM3100 over SPI, the thermometers on I²C and the ADC, and one serial port, the mini link behind an Argus. The pod does no analysis — a temperature correction and a baseline subtraction — and the one non-trivial thing on it, the grid interpolation, costs ~1 % of the core. The H523 is there for the family, not for the arithmetic.
• No MCU — passive tube heads: the tube builds of Photon / Helion are tube + HV + pulse-shaping boards. Their pulse outputs go to Quark-Tubes, on the same assembly, and land on its hardware timer inputs — counted without the core noticing. They are not in the MCU question at all.
• Own H523 — Quark-Tubes, the HV-tube counting unit (mini-NOD, NodBus mini type 2): it counts every tube and answers on an Argus segment, where the clock arrives with the bus. The two jobs split by hardware: the 13 Gadolin/Rhodion tubes take EXTI, because merging them means comparing arrival times so that one particle lit across several tubes counts once; everything else takes a timer input. A slave-class part would be too slow for the burst counting. The tubes ride Quark-Tubes' four published channels — beta · soft γ · hard γ · neutron (quark/tubes/BUS.md owns the layout).
• Own H7A3 — TWO scintillation boards, and the AD9251-80 on the PSSI is what asks for the part on both: Quark-Photon (SiPM + PIN, sampled simultaneously, guard ring populated) and Quark-Neutron/Positron (one SiPM channel and the photomultiplier's, one front end copied, no LTC6268 and no guard ring). quark/scintillation/photon/HARDWARE.md owns the board layer. Quark alone is the radiation part and its folder — never a unit and never a board: the tube counter is Quark-Tubes, NodBus mini type 2, and the scintillation side is Quark-Scintillation.
• Tesla — one board, and its MCU is the STM32H7A3IIT6 (the DSP tier — Tesla, Marconi and the two scintillation boards): the sferic receiver (3 ferrite rods + THS4551 + ADS127L14) and the H7A3 that runs its DSP are a single PCB in one box on the antenna frame. There is no inter-board link and no connector but the Galvani socket, so the fastest signals in the unit stay on inner layers instead of crossing a cable under the antenna. The NodBus (RS-485 + clock) runs up to the enclosure → the node is bus-powered and network-synced like any other, no separate bus or sync glue. (Separation is by layout — the digital corner behind a ground moat, the Galvani socket at the opposite edge from the front-ends.)

The H523 covers the slave tier as it covers the nodes — one part, one firmware base; a slave uses a corner of it.

Temperature-sensor policy (station-wide)

The station carries a pool of temperature sensors — above-ground and buried (e.g. the SHT45, ±0,1 °C, picked as the cheapest clean temp source that isn't bundled with extras; buried units sit at the soil depths). Internally the station holds ~3× more sensor values than it reports externally, so temperatures are selected from the pool as needed, not duplicated.

Rule — add a local temperature sensor to a board only when the module needs it locally for its own internal compensation / power-up calibration to output a clean value (a proper self-calibrating MOD; re-calibrating it externally would make it "botched", not clean). Otherwise take temperature from the pool — don't add a redundant sensor.

• Two thermometer parts across the station, and where the sensor sits decides which. On a board, or on a wall the board touches, a digital part on I²C — TMP117 or STS35, two makers, one fitted (TMP117: ±0,1 °C max over −20…+50 °C, ±0,15 to +70, 16 bit, 3,5 µA at 1 Hz, WSON 2×2; STS35: ±0,1 °C typical over 20…60 °C, 0,01 °C, −40…+125 °C, DFN-8; addresses 0x48 and 0x4A, so one driver tells them apart) — Quake's and Gauss's wall, Kronos's TCXO, Pascal's tube wall, Pluvius's cell — and Ceres's and Sakura's plate, on the board under the glass, because there the temperature is a product and the front end is off while it is read. Inside a sensing volume, or at the end of a lead that only corrects, an NTC on the board's ADC — 10 kΩ, 1 %, ratiometric against the ADC's own reference so the reference cancels, the divider switched from a GPIO for the conversion only: Tesla's rods, between Gauss's and Quake's coils, in Pluvius's vessel, on Quark-Tubes and its four heads, five of one kind — a board that spends its pins on inputs and whose temperature only corrects (quark/tubes/HARDWARE.md) — and on every H7A3 measuring board: Photon's crystal, SiPM and PIN, Positron's block and photomultiplier base, Marconi's board, Tesla's rods, where nothing asks for a digital part's 0,1 °C and a resistor puts no bus edge beside a front end (quark/WHY.md). Two order codes: NCP18XH103F03RB on a board, NXFT15XH103FA2B at the end of a lead; 3 kΩ + 100 nF at the ADC pin. It is 0,3–0,5 °C absolute uncalibrated and 0,1 °C after one point, which every correction in the station is content with, and it puts no current pulse and no bus edge where a sensor would hear it — a 1-Wire part's 1,5 mA conversion is tens of nT between a magnetometer's coils. No DS18B20 anywhere (core/WHY.md). Neither is a bought unit's job.
• Sakura (leaf wetness) — a TMP117/STS35 beside the plate: the compensation and the input calibration of the wetness read, and the temperature at the plate reported beside it on 0x0001 — one unit, two values.
• Ceres (soil moisture) — a TMP117/STS35 beside the electrode, same reason as Sakura (the capacitive read needs temperature compensation at the probe — water permittivity is temperature-dependent), and Ceres is the soil thermometer of its depth: the temperature rides 0x0001 beside the moisture, one unit, one address, the shape a bought T/RH pod has — always fitted, always reported; no bought soil thermometer in the base, and a thermometer at another depth or height is the site's own bought unit on an arm (ceres/README.md).
• Gadolin — none: Geiger-plateau counting is temperature-stable; classic dosimeters omit it, correctly.
• Photon's GM tubes and Helion — one NTC on each head's board, K1 · K2 · K3 on the GM shaper boards and K4 on the He³ preamplifier, read on Quark-Tubes and applied there per channel, never transmitted (quark/tubes/HARDWARE.md). Helion's pulse-height discrimination (the 764 keV peak against gamma) feels a gain drift even in a sealed tube, and the correction is digital.
• Modbus environmental sensors (pressure / humidity / VOC) — none extra: temperature is built into the sensor IC and self-calibrated, so Modbus already delivers a clean value.