Attachment Access Issue

flux

The gas-module schematic is now corrected and independently reconciled: both modules have 5 V VIN, dual GND, and UART TX connections; unused pins are explicitly no-connect; live ERC reports zero errors or warnings.
The PCB setup/placement executor also completed, but I cannot inspect or reconcile its result because no ACUs remain.
Still required
  • Verify the 100 × 100 mm, 2-layer placement and four M3 holes.
  • Route all eight nets and add GND copper/stitching.
  • Run final ERC/DRC and confirm zero airwires.
  • Export Gerbers, drill files, BOM, and placement data.
Received notification from "PCB Placement Setup" that it finished — picking the work back up.

flux

The schematic is complete and clean: both gas modules use Arduino 5 V, both ground pins are connected, UART TX routes are assigned, unused pins are no-connect, and ERC previously returned zero errors/warnings. The PCB placement/setup executor has now finished, but I cannot inspect its report or continue because no ACUs are available.
Remaining work:
  • Reconcile the executor’s 100 × 100 mm, 2-layer placement and four M3 mounting holes.
  • Verify connector orientation, edge clearances, overlaps, and gas-module footprint geometry.
  • Route all nets, add GND copper pours and stitching vias, and clear all airwires.
  • Run final ERC/DRC.
  • Export Gerbers, NC drills, BOM, and pick-and-place data.
Review PCB placement
Check placement and DRC
Prepare manufacturing exports
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Files

Schematic

Layout

Preview

J_H2_MODULE
J_CO_MODULE
J_ARDUINO
C_SHT3X_OPTIONAL
Capacitance
0.1uF
TP_3V3
TP_GND
J_BME
J_SPS30
R_SCL_OPTIONAL
Resistance
4.7kΩ
R_SDA_OPTIONAL
Resistance
4.7kΩ
TP_SCL
C_CO_OPTIONAL
Capacitance
0.1uF
C_SPS30_OPTIONAL
Capacitance
0.1uF
J_SHT3X
TP_SDA
C_BME_OPTIONAL
Capacitance
0.1uF
C_H2_OPTIONAL
Capacitance
0.1uF
Project Specification
Project Overview
Status: Partial schematic implementation — blocked pending verified 1.6 mm gas-interface footprints and schematic text/placement capability.
Passive 2-layer interconnect PCB for an Arduino UNO R4 multi-sensor installation. The board carries no MCU, regulator, level shifter, or signal conditioning; it provides Arduino/sensor interfaces, test access, optional I2C pull-ups, and optional local decoupling footprints. PCB layout, routing, and manufacturing export are out of scope.
Implemented Interfaces
  • Arduino screw-terminal nets: 3V3, GND, SDA, SCL, H2_TX_TO_D10, CO_TX_TO_D0, H2_VCC_IN, and CO_VCC_IN.
  • Shared I2C connection on three independent 4-pin headers: BME680/BME688 (0x77), SHT3X (0x44), and SPS30 (0x69). Header convention is pin 1=3V3, pin 2=GND, pin 3=SDA, pin 4=SCL.
  • Four test points: 3V3, GND, SDA, and SCL.
  • DNP optional R_SDA_OPTIONAL and R_SCL_OPTIONAL (4.7kΩ to 3V3) plus five DNP 0.1uF capacitors. The H2 and CO capacitors terminate at H2_VCC_IN/CO_VCC_IN respectively and are not tied to 3V3.
Explicitly Unresolved Items — Fabrication Blockers
  1. H2 and CO four-position 1.6 mm-pitch through-hole connectors are not instantiated. The Flux library search found no real 1.6 mm-pitch, four-position THT connector; the available closest parts were 2.00 mm and 2.54 mm, which were not substituted. The task toolset does not expose custom-component/custom-footprint authoring.
  2. Consequently, H2_TX_TO_D10 and CO_TX_TO_D0 currently end at the Arduino screw terminal and show ERC single-pin-net errors. No H2/CO RX test access was retained, and neither gas RX is connected to Arduino D1.
  3. The requested visible schematic strings and editable, square-pad-1 gas footprint cannot be authored with the available schematic-edit tools. Required strings for the future gas-interface implementation: H2 MODULE - VERIFY PIN ORDER, CO MODULE - VERIFY PIN ORDER, and CONFIRM MODULE PINOUT BEFORE FABRICATION.
  4. The selected CUI TBLH10V-350-08BK official data identifies it as an 8-pole, 3.50 mm, single-level terminal block; its Flux symbol exposes 16 pins. Pins 9–16 are marked no-connect as a temporary library-part workaround. A part-quality report was filed.
Acceptance Criteria
  • Do not proceed to PCB placement, routing, or fabrication until the gas-module pinout and 1.6 mm footprint are verified and the unresolved ERC errors are cleared.
  • Preserve SDA on pin 3 and SCL on pin 4 of every I2C header.
  • Do not tie H2_VCC_IN or CO_VCC_IN to 3V3.

  • Project Overview

  • Implemented Interfaces

  • Explicitly Unresolved Items — Fabrication Blockers

  • Acceptance Criteria