Leo generated the vendor part with easyeda2kicad (C5120257) -> Drogheda-v6.kicad_sym /
.pretty / .3dshapes, now registered in sym-lib-table and fp-lib-table.
CROSS-CHECK: the EasyEDA/LCSC symbol independently CONFIRMS the datasheet transcription -
pads 1-54 match the u-blox pin assignment function for function, and the 21 Reserved pads
are identical. Pads 55-102 are 48 extra GND pads (the ground array under the module), which
our symbol was missing; T3a2 adds them stacked on the pin-1 coordinate so one GND label
serves all. Symbol is now 102/102 pins, footprint = Drogheda-v6:LCC-LGA-102_L22.0-W17.0_FM660.
Block N as wired (verified by rebuilding connectivity from label-on-pin geometry):
GNSS_TX U16.16 + U18.43 GNSS_RX U16.17 + U18.42
DOUT_4G U18.26 (RXD2, RTCM in - modem end lands in T4)
USART1_RX U16.43 + Rdfu1.1 + U18.27 (TXD2 uplink; K1.1 also on this net per the PCB)
GNSS_RESET_N U16.53 (PC12) + U18.49 + R105 10k pull-up to 3V3_GNSS
GNSS_TIMEPULSE U16.23 (PA7) + U18.53
GNSS_ANT_DETECT U16.9 (PC1) + U18.4
GNSS_ANT_SHORT_N U16.10 (PC2) + U18.6
GNSS_RTK_STAT U16.11 (PC3) + U18.20 <- hardware answer to are-corrections-being-used
3V3_GNSS = U21.5 + U18.33/34 + C120-C124 + R105; U21 fed from SW_5V (stays MCU-gated)
V_BCKP = U18.36 on the UNGATED 3V3 so ephemeris survives a power-cycle
33 no-connects: the 21 reserved pads plus V_USB, USB_DM/DP, ANT_OFF, SDA, SCL, TX_READY,
D_SEL (open = UART mode), SAFEBOOT_N, EXTINT, GEOFENCE_STAT and the LDO NC/NR pin.
T3c fixes two coordinates the generators emitted as 3.552713679e-15 (i.e. zero); KiCad is
not guaranteed to accept exponent notation. See the script header for the lesson: a first
attempt used a bare numeric regex over the whole file and corrupted 264 UUIDs, because
segments such as 895e-4153 parse as scientific notation. Reverted from backup and redone
scoped to (at ...) forms only, with a UUID-integrity guard. Verified 2298 UUIDs, 0
malformed, 0 exponent coordinates.
STILL OPEN: the PCB has no U18/U21/passive footprints yet - that is a KiCad
Update-PCB-from-Schematic. And confirm the -04B datasheet pin assignment on paper.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YJ4eAB6zjQT49RVwpgfKdt
Leo's post-fork V5 work was copper-only: GND stitching +4 seg/+2 vias, /SYS5V -2 seg,
zones refilled 45 -> 48 polys. No footprints added/removed/moved, no pad-net changes,
schematic byte-identical. Rather than hand-merge a routing delta, v6 was re-forked from
the new v5 and the T1/T2 generator scripts replayed - deterministic and re-runnable.
Verified v6 vs v5: GND 212 seg / 176 vias, /SYS5V 57 seg, 48 filled polys all identical;
footprints 228 -> 224 (MOD1/J7/J8/SW4G1 gone); segments 1980 -> 1974 and vias 321 -> 320
(the 7 ripped /USART1_TX items). Net assertions all pass:
/USART6_TX = U16.37 + K1.10 | /USART6_RX = U16.38 | /USART1_RX = U16.43 + Rdfu1.1 + K1.1
/DIN_4G = K1.5 + K1.6 | /USART1_TX, /DOUT_4G, /MODEM_RST retired until T3/T4.
KNOWN: v6 zone fills are inherited from v5 and still carry cutouts for the 4 deleted
footprints - needs a GUI refill (MCP refill segfaults). Cosmetic until the layout phase.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YJ4eAB6zjQT49RVwpgfKdt
T0 hbox-watchdog-v6.{sch,pcb,pro,dru} forked from v5.5 @ e6ac8cc (new files on main,
same precedent as v4 -> v5). All internal project refs renamed, paren-balanced.
T1 Deleted the simpleRTK2B Pro socket (MOD1), both XBee sockets (J7/J8) and the modem
reset button (SW4G1) from schematic and PCB, plus the 25 on-pin labels that carried
their connectivity. The schematic has ZERO wires - connectivity is labels on pins -
so no wire/junction surgery was needed.
T2 Relay K1 pin 10 (NO contact) moves from PA9 /USART1_TX to PC6 /USART6_TX, giving the
MCU ownership of the modem RX line while K1 de-energised still feeds the receiver's
GGA straight to the modem (MCU-dead fail-safe). PA9 freed -> no_connect. USART6_RX
added on PC7. Retired /USART1_TX copper ripped (7 items).
Verified: /USART6_TX = U16.37 + K1.10 | /USART1_RX = U16.43 + Rdfu1.1 + K1.1 | PA9 free.
Nets awaiting T3/T4 silicon: /DOUT_4G, /MODEM_RST, /GNSS_TX, /GNSS_RX, /USART6_RX.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YJ4eAB6zjQT49RVwpgfKdt
