---
tags: [project-drogheda, product-spec, hbox, datasheet]
project: Project Drogheda
author: Helgen CTO
date: 2026-06-20
status: Draft
---

# HBOX — Product Specification (Series 1 → Series 2)

> The HBOX as a product: what it is, its variants, interfaces, and target specs.
> Requirements live in [[01-Requirements/SRS|SRS]]; parts in
> [[03-Architecture-Hardware/BOM-master|BOM]]. **Series 1** = current
> module-based build (ASA case + Dupont wiring). **Series 2** = the production PCB target.

## 1. Overview

HBOX is a ruggedized, cabinet-housed **RTK GPS telemetry unit** for heavy port
equipment. It delivers **centimetre-class** position over 4G to the Helgen
backend, with an onboard **watchdog** that keeps the correction link alive
unattended. Sold as a **gabinete (cabinet) assembly**: an industrial IP67 cabinet
(power, protection, ignition isolation) + the internal HBOX (RTK + 4G + watchdog).

## 2. Variants

| Variant | Machine power | Cabinet supply → | Notes |
|---|---|---|---|
| 12 V | 12 Vdc | Mean Well DDR-60G-24 → 24 V | Tractoplana, Montacargas |
| **24 V** | 24 Vdc | DDR-60G-24 → 24 V | **dominant**: RTG, Reach Stacker, Empty Handler |
| 48 V | 48 Vdc | DDR-60L-24 → 24 V | — |
| 110 V | 110 Vac/dc | HDR-60-24 / Siemens → 24 V | + AC SPD + termomagnético |
| 230 V | 220 Vac | HDR-60-24 → 24 V | + Bussman fusing |
| **Base Station** | 110 Vac | — | Ardusimple AS-PRO-CORS (RTK source/NTRIP caster) |

Internal HBOX electronics are **identical across variants**; only the cabinet
power/protection stage changes with machine voltage.

## 3. Key specifications (targets)

| Parameter | Spec |
|---|---|
| GNSS | u-blox ZED-F9P, multi-band L1/L2, multi-constellation |
| Position accuracy | RTK fixed: ~1–2 cm + 1 ppm CEP (open sky, valid corrections) |
| Update rate | 1 Hz (active) / 30 s (idle/battery) |
| Corrections | NTRIP/RTCM3 over 4G LTE (ArduSimple 4G NTRIP Master) |
| Telemetry out | NMEA over UDP → retranslator → Wialon/Traccar → VERONICA |
| HBOX input | 24 Vdc (from cabinet) + isolated ignition |
| Internal 5 V | Mean Well SD-15B-05 (18–36 V→5 V, 3 A) |
| Backup power | PowerBoost 1000C + 18650 Li-ion 1S4P *(under review — see SRS FR-7)* |
| MCU / watchdog | STM32F411 Blackpill, firmware `blackpillrtkcode_v2` |
| HBOX↔cabinet | GX16-5 locking circular connector |
| Antennas | 1× multiband GNSS (SMA) + 2× LTE (AR1582) |
| Status | external LED (multi-pattern) + onboard LED + debug UART dashboard |
| Cabinet | Yetlebox P3901, ABS, **IP67**, 39×29×16 cm, DIN rail |
| Environmental (target) | −10…+75 °C internal; ≥2 G vibration *(to validate)*; coastal humidity |
| Enclosure (HBOX) | **Series 1: ASA (adequate)** → Series 2: ASA or metal / plate-mount |

## 4. Interfaces

- **GX16-5 (HBOX↔cabinet):** 24 V, GND, ignition, (spare ×2) — finalize pinout on
  the schematic before PCB.
- **Antennas:** bulkhead SMA (GNSS) + 2× LTE via glands; torque + thread-lock.
- **SIM:** Telcel micro (Series 1, internal) → front-panel or MFF2 eSIM (Series 2).
- **Debug:** USB/UART ANSI dashboard (battery, fix, packets, temp, state).

## 5. Status indication (LED)

Boot (fast blink) · Running+RTK (solid) · Battery mode (heartbeat) · Searching/
degraded (slow blink) · LIMP/no-4G (SOS-ish double) · Power-cycling (strobe) ·
Sleep/critical (off). See firmware v2.

## 6. Model / SKU

`H-BOX Series1` (current) → `H-BOX Series2` (PCB). Each unit carries a Helgen
data label (modelo, serie, datos técnicos) + warning + input-voltage label.

## 7. Series 2 (production) deltas

ASA case retained (optional metal) · Dupont/hand-wire → PCB + locking connectors · discrete
watchdog → integrated load switch · battery decision · front-panel SIM ·
conduction cooling · documented assembly. See
[[03-Architecture-Hardware/hardware-respec-and-pcb-brief|hardware brief]].

## Open Questions

- [ ] Finalize GX16-5 pinout · battery strategy · enclosure material.
- [ ] Validate the 2 G vibration and IP67-after-mods claims for the datasheet.

## Related

- [[CLAUDE|Master Index]] · [[01-Requirements/SRS|SRS]] · [[03-Architecture-Hardware/BOM-master|BOM]]