Commander1024/ESP32_Serial_Swiss_Army_Knife
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ESP32_Serial_Swiss_Army_Knife/hardware/PCB/serial-carrier.kicad_sch
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Commander1024 60c1e279d6 Add KiCad module carrier PCB draft 
Introduce an editable KiCad 10 schematic and routed two-layer 82 × 80 mm
layout with local provisional footprints, validation tooling, and
component
research. Keep the RS-232 male-module mapping and mechanical clearances
explicitly provisional pending hardware verification.
2026-09-20 23:14:01 +02:00

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(kicad_sch (version 20250114) (generator "eeschema") (uuid "c86e0d56-4290-5f2b-b790-14926c8cdeea") (paper "A3")
(title_block (title "ESP32 Serial Swiss Army Knife - Module Carrier") (date "2026-09-20") (rev "A0 DRAFT") (comment 1 "Not fabrication-ready: provisional module footprints and male RS-232 mapping"))
(lib_symbols (symbol "Carrier:HW678_N16R8" (pin_names (offset 0.762)) (in_bom yes) (on_board yes)
(property "Reference" "U" (at 0 34.29 0) (effects (font (size 1.27 1.27)) ))
(property "Value" "HW678_N16R8" (at 0 31.75 0) (effects (font (size 1.27 1.27)) ))
(property "Footprint" "Carrier:HW678_2x22_Provisional" (at 0 0 0) (effects (font (size 1.27 1.27)) (hide yes)))
(property "Datasheet" "" (at 0 0 0) (effects (font (size 1.27 1.27)) (hide yes)))
(property "Description" "HW-678 V0.0.0 / N16R8 carrier interface; project numbering; onboard USB/regulator retained" (at 0 0 0) (effects (font (size 1.27 1.27)) (hide yes)))
(symbol "HW678_N16R8_0_1" (rectangle (start -17.78 29.21) (end 17.78 -29.21) (stroke (width 0.254) (type default)) (fill (type background))))
(symbol "HW678_N16R8_1_1"
(pin power_out line (at -22.86 26.67 0) (length 5.08) (name "3V3" (effects (font (size 1.016 1.016)) )) (number "1" (effects (font (size 1.016 1.016)) )))
(pin passive line (at -22.86 24.13 0) (length 5.08) (name "3V3" (effects (font (size 1.016 1.016)) )) (number "2" (effects (font (size 1.016 1.016)) )))
(pin input line (at -22.86 21.59 0) (length 5.08) (name "EN" (effects (font (size 1.016 1.016)) )) (number "3" (effects (font (size 1.016 1.016)) )))
(pin input line (at -22.86 19.05 0) (length 5.08) (name "GPIO4" (effects (font (size 1.016 1.016)) )) (number "4" (effects (font (size 1.016 1.016)) )))
(pin input line (at -22.86 16.51 0) (length 5.08) (name "GPIO5" (effects (font (size 1.016 1.016)) )) (number "5" (effects (font (size 1.016 1.016)) )))
(pin input line (at -22.86 13.97 0) (length 5.08) (name "GPIO6" (effects (font (size 1.016 1.016)) )) (number "6" (effects (font (size 1.016 1.016)) )))
(pin output line (at -22.86 11.43 0) (length 5.08) (name "GPIO7" (effects (font (size 1.016 1.016)) )) (number "7" (effects (font (size 1.016 1.016)) )))
(pin output line (at -22.86 8.89 0) (length 5.08) (name "GPIO15" (effects (font (size 1.016 1.016)) )) (number "8" (effects (font (size 1.016 1.016)) )))
(pin input line (at -22.86 6.35 0) (length 5.08) (name "GPIO16" (effects (font (size 1.016 1.016)) )) (number "9" (effects (font (size 1.016 1.016)) )))
(pin output line (at -22.86 3.81 0) (length 5.08) (name "GPIO17" (effects (font (size 1.016 1.016)) )) (number "10" (effects (font (size 1.016 1.016)) )))
(pin input line (at -22.86 1.27 0) (length 5.08) (name "GPIO18" (effects (font (size 1.016 1.016)) )) (number "11" (effects (font (size 1.016 1.016)) )))
(pin input line (at -22.86 -1.27 0) (length 5.08) (name "GPIO8" (effects (font (size 1.016 1.016)) )) (number "12" (effects (font (size 1.016 1.016)) )))
(pin bidirectional line (at -22.86 -3.81 0) (length 5.08) (name "GPIO3" (effects (font (size 1.016 1.016)) )) (number "13" (effects (font (size 1.016 1.016)) )))
(pin bidirectional line (at -22.86 -6.35 0) (length 5.08) (name "GPIO46" (effects (font (size 1.016 1.016)) )) (number "14" (effects (font (size 1.016 1.016)) )))
(pin bidirectional line (at -22.86 -8.89 0) (length 5.08) (name "GPIO9" (effects (font (size 1.016 1.016)) )) (number "15" (effects (font (size 1.016 1.016)) )))
(pin input line (at -22.86 -11.43 0) (length 5.08) (name "GPIO10" (effects (font (size 1.016 1.016)) )) (number "16" (effects (font (size 1.016 1.016)) )))
(pin bidirectional line (at -22.86 -13.97 0) (length 5.08) (name "GPIO11" (effects (font (size 1.016 1.016)) )) (number "17" (effects (font (size 1.016 1.016)) )))
(pin output line (at -22.86 -16.51 0) (length 5.08) (name "GPIO12" (effects (font (size 1.016 1.016)) )) (number "18" (effects (font (size 1.016 1.016)) )))
(pin input line (at -22.86 -19.05 0) (length 5.08) (name "GPIO13" (effects (font (size 1.016 1.016)) )) (number "19" (effects (font (size 1.016 1.016)) )))
(pin input line (at -22.86 -21.59 0) (length 5.08) (name "GPIO14" (effects (font (size 1.016 1.016)) )) (number "20" (effects (font (size 1.016 1.016)) )))
(pin passive line (at -22.86 -24.13 0) (length 5.08) (name "5V" (effects (font (size 1.016 1.016)) )) (number "21" (effects (font (size 1.016 1.016)) )))
(pin power_out line (at -22.86 -26.67 0) (length 5.08) (name "GND" (effects (font (size 1.016 1.016)) )) (number "22" (effects (font (size 1.016 1.016)) )))
(pin passive line (at 22.86 26.67 180) (length 5.08) (name "GND" (effects (font (size 1.016 1.016)) )) (number "23" (effects (font (size 1.016 1.016)) )))
(pin bidirectional line (at 22.86 24.13 180) (length 5.08) (name "GPIO43" (effects (font (size 1.016 1.016)) )) (number "24" (effects (font (size 1.016 1.016)) )))
(pin bidirectional line (at 22.86 21.59 180) (length 5.08) (name "GPIO44" (effects (font (size 1.016 1.016)) )) (number "25" (effects (font (size 1.016 1.016)) )))
(pin bidirectional line (at 22.86 19.05 180) (length 5.08) (name "GPIO1" (effects (font (size 1.016 1.016)) )) (number "26" (effects (font (size 1.016 1.016)) )))
(pin bidirectional line (at 22.86 16.51 180) (length 5.08) (name "GPIO2" (effects (font (size 1.016 1.016)) )) (number "27" (effects (font (size 1.016 1.016)) )))
(pin bidirectional line (at 22.86 13.97 180) (length 5.08) (name "GPIO42" (effects (font (size 1.016 1.016)) )) (number "28" (effects (font (size 1.016 1.016)) )))
(pin bidirectional line (at 22.86 11.43 180) (length 5.08) (name "GPIO41" (effects (font (size 1.016 1.016)) )) (number "29" (effects (font (size 1.016 1.016)) )))
(pin bidirectional line (at 22.86 8.89 180) (length 5.08) (name "GPIO40" (effects (font (size 1.016 1.016)) )) (number "30" (effects (font (size 1.016 1.016)) )))
(pin bidirectional line (at 22.86 6.35 180) (length 5.08) (name "GPIO39" (effects (font (size 1.016 1.016)) )) (number "31" (effects (font (size 1.016 1.016)) )))
(pin bidirectional line (at 22.86 3.81 180) (length 5.08) (name "GPIO38" (effects (font (size 1.016 1.016)) )) (number "32" (effects (font (size 1.016 1.016)) )))
(pin bidirectional line (at 22.86 1.27 180) (length 5.08) (name "GPIO37" (effects (font (size 1.016 1.016)) )) (number "33" (effects (font (size 1.016 1.016)) )))
(pin bidirectional line (at 22.86 -1.27 180) (length 5.08) (name "GPIO36" (effects (font (size 1.016 1.016)) )) (number "34" (effects (font (size 1.016 1.016)) )))
(pin bidirectional line (at 22.86 -3.81 180) (length 5.08) (name "GPIO35" (effects (font (size 1.016 1.016)) )) (number "35" (effects (font (size 1.016 1.016)) )))
(pin bidirectional line (at 22.86 -6.35 180) (length 5.08) (name "GPIO0" (effects (font (size 1.016 1.016)) )) (number "36" (effects (font (size 1.016 1.016)) )))
(pin bidirectional line (at 22.86 -8.89 180) (length 5.08) (name "GPIO45" (effects (font (size 1.016 1.016)) )) (number "37" (effects (font (size 1.016 1.016)) )))
(pin bidirectional line (at 22.86 -11.43 180) (length 5.08) (name "GPIO48" (effects (font (size 1.016 1.016)) )) (number "38" (effects (font (size 1.016 1.016)) )))
(pin bidirectional line (at 22.86 -13.97 180) (length 5.08) (name "GPIO47" (effects (font (size 1.016 1.016)) )) (number "39" (effects (font (size 1.016 1.016)) )))
(pin bidirectional line (at 22.86 -16.51 180) (length 5.08) (name "GPIO21" (effects (font (size 1.016 1.016)) )) (number "40" (effects (font (size 1.016 1.016)) )))
(pin bidirectional line (at 22.86 -19.05 180) (length 5.08) (name "GPIO20" (effects (font (size 1.016 1.016)) )) (number "41" (effects (font (size 1.016 1.016)) )))
(pin bidirectional line (at 22.86 -21.59 180) (length 5.08) (name "GPIO19" (effects (font (size 1.016 1.016)) )) (number "42" (effects (font (size 1.016 1.016)) )))
(pin passive line (at 22.86 -24.13 180) (length 5.08) (name "GND" (effects (font (size 1.016 1.016)) )) (number "43" (effects (font (size 1.016 1.016)) )))
(pin passive line (at 22.86 -26.67 180) (length 5.08) (name "GND" (effects (font (size 1.016 1.016)) )) (number "44" (effects (font (size 1.016 1.016)) )))
)
)
(symbol "Carrier:MAX3243_Module_Reference" (pin_names (offset 0.762)) (in_bom yes) (on_board yes)
(property "Reference" "U" (at 0 22.86 0) (effects (font (size 1.27 1.27)) ))
(property "Value" "MAX3243_Module_Reference" (at 0 20.32 0) (effects (font (size 1.27 1.27)) ))
(property "Footprint" "" (at 0 0 0) (effects (font (size 1.27 1.27)) (hide yes)))
(property "Datasheet" "" (at 0 0 0) (effects (font (size 1.27 1.27)) (hide yes)))
(property "Description" "Adafruit male 6253 intended; physical numbering from published female 5988 CAD, VERIFY MALE" (at 0 0 0) (effects (font (size 1.27 1.27)) (hide yes)))
(symbol "MAX3243_Module_Reference_0_1" (rectangle (start -15.24 17.78) (end 15.24 -17.78) (stroke (width 0.254) (type default)) (fill (type background))))
(symbol "MAX3243_Module_Reference_1_1"
(pin power_in line (at -20.32 13.97 0) (length 5.08) (name "Vin" (effects (font (size 1.016 1.016)) )) (number "1" (effects (font (size 1.016 1.016)) )))
(pin power_in line (at -20.32 11.43 0) (length 5.08) (name "GND" (effects (font (size 1.016 1.016)) )) (number "2" (effects (font (size 1.016 1.016)) )))
(pin output line (at -20.32 8.89 0) (length 5.08) (name "DCD" (effects (font (size 1.016 1.016)) )) (number "3" (effects (font (size 1.016 1.016)) )))
(pin output line (at -20.32 6.35 0) (length 5.08) (name "RX" (effects (font (size 1.016 1.016)) )) (number "4" (effects (font (size 1.016 1.016)) )))
(pin input line (at -20.32 3.81 0) (length 5.08) (name "TX" (effects (font (size 1.016 1.016)) )) (number "5" (effects (font (size 1.016 1.016)) )))
(pin input line (at -20.32 1.27 0) (length 5.08) (name "DTR" (effects (font (size 1.016 1.016)) )) (number "6" (effects (font (size 1.016 1.016)) )))
(pin output line (at -20.32 -1.27 0) (length 5.08) (name "DSR" (effects (font (size 1.016 1.016)) )) (number "7" (effects (font (size 1.016 1.016)) )))
(pin input line (at -20.32 -3.81 0) (length 5.08) (name "RTS" (effects (font (size 1.016 1.016)) )) (number "8" (effects (font (size 1.016 1.016)) )))
(pin output line (at -20.32 -6.35 0) (length 5.08) (name "CTS" (effects (font (size 1.016 1.016)) )) (number "9" (effects (font (size 1.016 1.016)) )))
(pin output line (at -20.32 -8.89 0) (length 5.08) (name "RI" (effects (font (size 1.016 1.016)) )) (number "10" (effects (font (size 1.016 1.016)) )))
(pin output line (at -20.32 -11.43 0) (length 5.08) (name "VLD" (effects (font (size 1.016 1.016)) )) (number "11" (effects (font (size 1.016 1.016)) )))
(pin input line (at -20.32 -13.97 0) (length 5.08) (name "OFF_N" (effects (font (size 1.016 1.016)) )) (number "12" (effects (font (size 1.016 1.016)) )))
)
)
(symbol "Carrier:OLED_I2C_26mm" (pin_names (offset 0.762)) (in_bom yes) (on_board yes)
(property "Reference" "DS" (at 0 12.7 0) (effects (font (size 1.27 1.27)) ))
(property "Value" "OLED_I2C_26mm" (at 0 10.16 0) (effects (font (size 1.27 1.27)) ))
(property "Footprint" "Carrier:OLED_26mm_I2C_Provisional" (at 0 0 0) (effects (font (size 1.27 1.27)) (hide yes)))
(property "Datasheet" "" (at 0 0 0) (effects (font (size 1.27 1.27)) (hide yes)))
(property "Description" "User fit-verified 26 mm OLED; front/top header GND VCC SCL SDA" (at 0 0 0) (effects (font (size 1.27 1.27)) (hide yes)))
(symbol "OLED_I2C_26mm_0_1" (rectangle (start -10.16 7.62) (end 10.16 -7.62) (stroke (width 0.254) (type default)) (fill (type background))))
(symbol "OLED_I2C_26mm_1_1"
(pin power_in line (at -15.24 3.81 0) (length 5.08) (name "GND" (effects (font (size 1.016 1.016)) )) (number "1" (effects (font (size 1.016 1.016)) )))
(pin power_in line (at -15.24 1.27 0) (length 5.08) (name "VCC" (effects (font (size 1.016 1.016)) )) (number "2" (effects (font (size 1.016 1.016)) )))
(pin input line (at -15.24 -1.27 0) (length 5.08) (name "SCL" (effects (font (size 1.016 1.016)) )) (number "3" (effects (font (size 1.016 1.016)) )))
(pin bidirectional line (at -15.24 -3.81 0) (length 5.08) (name "SDA" (effects (font (size 1.016 1.016)) )) (number "4" (effects (font (size 1.016 1.016)) )))
)
)
(symbol "Carrier:SW_NO" (pin_names (offset 0.762)) (in_bom yes) (on_board yes)
(property "Reference" "SW" (at 0 7.62 0) (effects (font (size 1.27 1.27)) ))
(property "Value" "SW_NO" (at 0 5.08 0) (effects (font (size 1.27 1.27)) ))
(property "Footprint" "Button_Switch_THT:SW_TH_Tactile_Omron_B3F-100x" (at 0 0 0) (effects (font (size 1.27 1.27)) (hide yes)))
(property "Datasheet" "" (at 0 0 0) (effects (font (size 1.27 1.27)) (hide yes)))
(property "Description" "Normally open contact; footprint duplicates pads 1 and 2 for internally common terminal pairs" (at 0 0 0) (effects (font (size 1.27 1.27)) (hide yes)))
(symbol "SW_NO_0_1" (polyline (pts (xy -2.54 0) (xy 2.54 1.524)) (stroke (width 0.254) (type default)) (fill (type none)))(circle (center -2.54 0) (radius 0.35) (stroke (width 0.1524) (type default)) (fill (type none)))(circle (center 2.54 0) (radius 0.35) (stroke (width 0.1524) (type default)) (fill (type none))))
(symbol "SW_NO_1_1"
(pin passive line (at -5.08 0 0) (length 2.54) (name "~" (effects (font (size 1.016 1.016)) )) (number "1" (effects (font (size 1.016 1.016)) )))
(pin passive line (at 5.08 0 180) (length 2.54) (name "~" (effects (font (size 1.016 1.016)) )) (number "2" (effects (font (size 1.016 1.016)) )))
)
)
(symbol "Carrier:R" (pin_names (offset 0.762)) (in_bom yes) (on_board yes)
(property "Reference" "R" (at 0 6.096 0) (effects (font (size 1.27 1.27)) ))
(property "Value" "R" (at 0 3.556 0) (effects (font (size 1.27 1.27)) ))
(property "Footprint" "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal" (at 0 0 0) (effects (font (size 1.27 1.27)) (hide yes)))
(property "Datasheet" "" (at 0 0 0) (effects (font (size 1.27 1.27)) (hide yes)))
(property "Description" "Resistor, axial DIN0207 footprint; exact MPN pending" (at 0 0 0) (effects (font (size 1.27 1.27)) (hide yes)))
(symbol "R_0_1" (rectangle (start -2.54 1.016) (end 2.54 -1.016) (stroke (width 0.254) (type default)) (fill (type background))))
(symbol "R_1_1"
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(pin passive line (at 5.08 0 180) (length 2.54) (name "~" (effects (font (size 1.016 1.016)) )) (number "2" (effects (font (size 1.016 1.016)) )))
)
))
(symbol (lib_id "Carrier:HW678_N16R8") (at 95.25 109.22 0) (unit 1) (in_bom yes) (on_board yes) (dnp no) (uuid "3ab265d0-7fd3-5891-94eb-d39426c6a8a3")
(property "Reference" "U1" (at 95.25 74.93 0) (effects (font (size 1.27 1.27)) ))
(property "Value" "HW678 / S3-N16R8" (at 95.25 77.47 0) (effects (font (size 1.27 1.27)) ))
(property "Footprint" "Carrier:HW678_2x22_Provisional" (at 95.25 109.22 0) (effects (font (size 1.27 1.27)) (hide yes)))
(property "Datasheet" "" (at 95.25 109.22 0) (effects (font (size 1.27 1.27)) (hide yes)))
(property "Status" "Header geometry nominal; outline/antenna clearance pending" (at 95.25 109.22 0) (effects (font (size 1.27 1.27)) (hide yes)))
(property "Pin_numbering" "Left 1-22; right 23-44; both top-to-bottom, antenna up" (at 95.25 109.22 0) (effects (font (size 1.27 1.27)) (hide yes)))
(pin "1" (uuid "4a464e7d-e18b-557c-8fae-641c5fc5419f"))
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(pin "12" (uuid "35b6d88b-5907-5977-aadc-eeb22f38e80a"))
(pin "13" (uuid "351de5e5-c93c-5146-ab20-04e74cf929e8"))
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(pin "44" (uuid "cf42b784-faa2-51f5-8b6e-9cbe009fc3ac"))
(instances (project "serial-carrier" (path "/c86e0d56-4290-5f2b-b790-14926c8cdeea" (reference "U1") (unit 1)))))
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(pin "1" (uuid "0e490c78-3450-5a5b-b7d3-d55c32de988b"))
(pin "2" (uuid "6bbc82d1-8cfb-5fd5-832c-8df2775a89c9"))
(instances (project "serial-carrier" (path "/c86e0d56-4290-5f2b-b790-14926c8cdeea" (reference "SW1") (unit 1)))))
(wire (pts (xy 322.58 104.14) (xy 309.88 104.14)) (stroke (width 0) (type default)) (uuid "5b028b05-8a36-55db-aaf9-9b382e614203"))
(label "BTN_PREVIOUS" (at 309.88 104.14 0) (effects (font (size 1.016 1.016)) (justify left bottom)) (uuid "5e45c195-3cf8-5a7b-93e1-84b53b154824"))
(wire (pts (xy 332.74 104.14) (xy 345.44 104.14)) (stroke (width 0) (type default)) (uuid "4036fecd-dbe2-5786-a9b9-dce5b14fbf7f"))
(label "GND" (at 345.44 104.14 0) (effects (font (size 1.016 1.016)) (justify left bottom)) (uuid "d3b7a7cc-4c33-5080-b795-7892d393bb53"))
(text "Previous / back" (at 302.26 110.49 0) (effects (font (size 1.016 1.016)) (justify left top)) (uuid "d84df288-be52-5de4-899d-bf29ba78f4f2"))
(symbol (lib_id "Carrier:R") (at 327.66 124.46 0) (unit 1) (in_bom yes) (on_board yes) (dnp no) (uuid "405055c0-35ab-5334-ad4d-30d45c5ef6f2")
(property "Reference" "R2" (at 327.66 118.364 0) (effects (font (size 1.27 1.27)) ))
(property "Value" "2.2k 1%" (at 327.66 120.904 0) (effects (font (size 1.27 1.27)) ))
(property "Footprint" "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal" (at 327.66 124.46 0) (effects (font (size 1.27 1.27)) (hide yes)))
(property "Datasheet" "" (at 327.66 124.46 0) (effects (font (size 1.27 1.27)) (hide yes)))
(property "Rating" "At least 0.125 W; exact resistor MPN pending" (at 327.66 124.46 0) (effects (font (size 1.27 1.27)) (hide yes)))
(pin "1" (uuid "c23dbef2-d61d-56fa-a158-bb9912ef48ac"))
(pin "2" (uuid "f60eb205-60d1-5d8f-ac84-ca04f66e7106"))
(instances (project "serial-carrier" (path "/c86e0d56-4290-5f2b-b790-14926c8cdeea" (reference "R2") (unit 1)))))
(wire (pts (xy 322.58 124.46) (xy 309.88 124.46)) (stroke (width 0) (type default)) (uuid "eb68b8eb-dbe6-5133-8089-e9de01165396"))
(label "+3V3" (at 309.88 124.46 0) (effects (font (size 1.016 1.016)) (justify left bottom)) (uuid "5bef1a07-0985-5bb8-9b36-ed0c9e2c82ab"))
(wire (pts (xy 332.74 124.46) (xy 345.44 124.46)) (stroke (width 0) (type default)) (uuid "b3b13ef4-4203-52d8-889b-70534a4a1b28"))
(label "BTN_SELECT" (at 345.44 124.46 0) (effects (font (size 1.016 1.016)) (justify left bottom)) (uuid "e8d69aad-ffba-5ace-a414-b44ff7528289"))
(symbol (lib_id "Carrier:SW_NO") (at 327.66 139.7 0) (unit 1) (in_bom yes) (on_board yes) (dnp no) (uuid "c522a716-55a4-584d-a12e-ab135b4c08eb")
(property "Reference" "SW2" (at 327.66 132.08 0) (effects (font (size 1.27 1.27)) ))
(property "Value" "B3F-1000" (at 327.66 134.62 0) (effects (font (size 1.27 1.27)) ))
(property "Footprint" "Button_Switch_THT:SW_TH_Tactile_Omron_B3F-100x" (at 327.66 139.7 0) (effects (font (size 1.27 1.27)) (hide yes)))
(property "Datasheet" "" (at 327.66 139.7 0) (effects (font (size 1.27 1.27)) (hide yes)))
(property "Manufacturer" "Omron" (at 327.66 139.7 0) (effects (font (size 1.27 1.27)) (hide yes)))
(property "MPN" "B3F-1000" (at 327.66 139.7 0) (effects (font (size 1.27 1.27)) (hide yes)))
(property "Function" "Select / confirm" (at 327.66 139.7 0) (effects (font (size 1.27 1.27)) (hide yes)))
(property "Procurement" "Live stock not verified" (at 327.66 139.7 0) (effects (font (size 1.27 1.27)) (hide yes)))
(pin "1" (uuid "19bafbc6-666f-5e53-a4ef-265057c6dc8a"))
(pin "2" (uuid "9e3f47ba-92ac-5503-9d87-6b5590a70ccb"))
(instances (project "serial-carrier" (path "/c86e0d56-4290-5f2b-b790-14926c8cdeea" (reference "SW2") (unit 1)))))
(wire (pts (xy 322.58 139.7) (xy 309.88 139.7)) (stroke (width 0) (type default)) (uuid "05f5a256-5e68-53ae-a051-81eab3a14d4d"))
(label "BTN_SELECT" (at 309.88 139.7 0) (effects (font (size 1.016 1.016)) (justify left bottom)) (uuid "a90ee2dc-ed10-5bb9-9082-99cdbfeac4c9"))
(wire (pts (xy 332.74 139.7) (xy 345.44 139.7)) (stroke (width 0) (type default)) (uuid "04211708-439f-5d65-a5c6-21cf89318109"))
(label "GND" (at 345.44 139.7 0) (effects (font (size 1.016 1.016)) (justify left bottom)) (uuid "7f92da60-87bd-5c50-afc0-4046d0c67767"))
(text "Select / confirm" (at 302.26 146.05 0) (effects (font (size 1.016 1.016)) (justify left top)) (uuid "c28f2639-f392-552b-858e-b031aabc8c0a"))
(symbol (lib_id "Carrier:R") (at 327.66 160.02 0) (unit 1) (in_bom yes) (on_board yes) (dnp no) (uuid "78f9a74f-5d91-5687-b50e-68176333df23")
(property "Reference" "R3" (at 327.66 153.924 0) (effects (font (size 1.27 1.27)) ))
(property "Value" "2.2k 1%" (at 327.66 156.464 0) (effects (font (size 1.27 1.27)) ))
(property "Footprint" "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal" (at 327.66 160.02 0) (effects (font (size 1.27 1.27)) (hide yes)))
(property "Datasheet" "" (at 327.66 160.02 0) (effects (font (size 1.27 1.27)) (hide yes)))
(property "Rating" "At least 0.125 W; exact resistor MPN pending" (at 327.66 160.02 0) (effects (font (size 1.27 1.27)) (hide yes)))
(pin "1" (uuid "d871ee2e-bc82-5f23-a436-7b7ab74b73a9"))
(pin "2" (uuid "96528b84-ba49-5f38-8445-b6ca2cadc93b"))
(instances (project "serial-carrier" (path "/c86e0d56-4290-5f2b-b790-14926c8cdeea" (reference "R3") (unit 1)))))
(wire (pts (xy 322.58 160.02) (xy 309.88 160.02)) (stroke (width 0) (type default)) (uuid "ad7355d6-b196-5b55-b518-28095d4cd010"))
(label "+3V3" (at 309.88 160.02 0) (effects (font (size 1.016 1.016)) (justify left bottom)) (uuid "08ba6112-d16a-5597-b3f3-8794ed1ea849"))
(wire (pts (xy 332.74 160.02) (xy 345.44 160.02)) (stroke (width 0) (type default)) (uuid "7a2af359-d23d-5777-9193-ff203ac538d8"))
(label "BTN_NEXT" (at 345.44 160.02 0) (effects (font (size 1.016 1.016)) (justify left bottom)) (uuid "5011a121-e49f-5298-8cc1-2998dfa40f7d"))
(symbol (lib_id "Carrier:SW_NO") (at 327.66 175.26 0) (unit 1) (in_bom yes) (on_board yes) (dnp no) (uuid "35caa6bb-42a6-512c-848c-f1e4457aa97f")
(property "Reference" "SW3" (at 327.66 167.64 0) (effects (font (size 1.27 1.27)) ))
(property "Value" "B3F-1000" (at 327.66 170.18 0) (effects (font (size 1.27 1.27)) ))
(property "Footprint" "Button_Switch_THT:SW_TH_Tactile_Omron_B3F-100x" (at 327.66 175.26 0) (effects (font (size 1.27 1.27)) (hide yes)))
(property "Datasheet" "" (at 327.66 175.26 0) (effects (font (size 1.27 1.27)) (hide yes)))
(property "Manufacturer" "Omron" (at 327.66 175.26 0) (effects (font (size 1.27 1.27)) (hide yes)))
(property "MPN" "B3F-1000" (at 327.66 175.26 0) (effects (font (size 1.27 1.27)) (hide yes)))
(property "Function" "Next" (at 327.66 175.26 0) (effects (font (size 1.27 1.27)) (hide yes)))
(property "Procurement" "Live stock not verified" (at 327.66 175.26 0) (effects (font (size 1.27 1.27)) (hide yes)))
(pin "1" (uuid "85beb3b7-e16f-5450-ba94-5711245a7b25"))
(pin "2" (uuid "300c4196-eb91-5e58-a9aa-c84b8f7c4219"))
(instances (project "serial-carrier" (path "/c86e0d56-4290-5f2b-b790-14926c8cdeea" (reference "SW3") (unit 1)))))
(wire (pts (xy 322.58 175.26) (xy 309.88 175.26)) (stroke (width 0) (type default)) (uuid "899495f9-e27d-5c7f-9961-bda42dd5b5b5"))
(label "BTN_NEXT" (at 309.88 175.26 0) (effects (font (size 1.016 1.016)) (justify left bottom)) (uuid "4917cd5a-7d37-54f4-8139-7ae4739c44c4"))
(wire (pts (xy 332.74 175.26) (xy 345.44 175.26)) (stroke (width 0) (type default)) (uuid "f48c99dc-9974-5205-8a87-3b1278a4fdfd"))
(label "GND" (at 345.44 175.26 0) (effects (font (size 1.016 1.016)) (justify left bottom)) (uuid "3c7713ca-d8f2-53fd-8e98-6fd376e4570c"))
(text "Next" (at 302.26 181.61 0) (effects (font (size 1.016 1.016)) (justify left top)) (uuid "0db41e9e-455f-5007-82ee-b485aacda4c4"))
(text "MODULE CARRIER - INITIAL SCHEMATIC" (at 15.24 15.24 0) (effects (font (size 2.54 2.54)) (justify left top)) (uuid "81374533-4a9c-521b-8834-9fa30bb907b5"))
(text "Native KiCad 10 schematic. Named wire labels join matching nets on this sheet.\nRead hardware/PCB/README.md before layout or fabrication." (at 15.24 24.13 0) (effects (font (size 1.27 1.27)) (justify left top)) (uuid "d9d89d85-2a9c-5e76-bd60-48c81ac7f524"))
(text "U1: complete development board" (at 53.34 57.15 0) (effects (font (size 1.778 1.778)) (justify left top)) (uuid "320a8f4e-ff8b-5100-845b-dfe249b39a2e"))
(text "Antenna up / USB down: left row 1-22, right row 23-44.\nNC marks mean unused on carrier, not unused inside module." (at 53.34 64.77 0) (effects (font (size 1.016 1.016)) (justify left top)) (uuid "649df1fa-48c0-580d-aeb8-d019ffd0b61d"))
(text "U2: complete RS-232 breakout" (at 177.8 57.15 0) (effects (font (size 1.778 1.778)) (justify left top)) (uuid "5226007c-1904-547d-8ddb-008d14b83d51"))
(text "Male 6253 selected. Numbers from published 5988 female CAD.\nVERIFY male header before routing; no footprint assigned.\nDE-9 and charge pump are already on the module." (at 177.8 64.77 0) (effects (font (size 1.016 1.016)) (justify left top)) (uuid "9b62e7ca-695a-51af-bbbe-e7ee4ee45c08"))
(text "Controls: active-low, firmware-debounced" (at 292.1 57.15 0) (effects (font (size 1.778 1.778)) (justify left top)) (uuid "9d91985c-7375-5177-9a5e-8280e3bcaff6"))
(text "External 2.2k pull-ups: ~1.5 mA pressed at 3.3 V.\nChosen for B3F-1000 rated contact load; internal\npull-ups may remain enabled. Exact resistor MPN pending." (at 292.1 64.77 0) (effects (font (size 1.016 1.016)) (justify left top)) (uuid "b2dd72f5-86fc-5ce1-b09a-67a6fe9404d4"))
(text "DS1: front view GND / VCC / SCL / SDA" (at 177.8 128.27 0) (effects (font (size 1.524 1.524)) (justify left top)) (uuid "7b57748d-38ca-5712-97f9-bf6dab6dafaf"))
(text "Power at 3.3 V only. Verify on-module I2C pull-ups;\nexternal values intentionally not guessed." (at 177.8 165.1 0) (effects (font (size 1.016 1.016)) (justify left top)) (uuid "fb23ec11-40f8-56c7-b78b-0da2d40e4b72"))
(text "POWER / RECOVERY\nPower only through U1's existing USB ports. No carrier 5 V input.\nU1 regulator supplies +3V3; GND pins are common on the module.\nPin 1 +3V3 and pin 22 GND model the onboard supply for ERC.\nGPIO19/20 native USB and GPIO43/44 UART0 remain onboard.\nVerify USB power isolation before attaching two powered hosts.\nKeep both USB connectors and reset/boot buttons accessible." (at 15.24 185.42 0) (effects (font (size 1.27 1.27)) (justify left top)) (uuid "cadf6b77-e888-5f04-b4f6-3873114844ca"))
(text "RS-232 / ELECTRICAL LIMITS\nTX/RX and modem labels are at the ESP32 logic side.\nOFF_N is active low; GPIO9 must remain open-drain.\nBreakout provides its OFF pull-up. No galvanic isolation.\nNo carrier connection to raw RS-232 voltages.\nCarrier GND, USB GND and RS-232 signal ground are common.\nNever power OLED or MAX3243 logic from 5 V." (at 152.4 185.42 0) (effects (font (size 1.27 1.27)) (justify left top)) (uuid "0f7da388-3edb-5cc3-9937-13492397a221"))
(text "BEFORE PCB RELEASE\nVerify male breakout pin order/footprint.\nConfirm header/socket finished-hole requirements.\nComplete module courtyards and antenna clearance.\nVerify 3.3 V budget, OLED pull-ups and USB power path.\nChoose mounting hardware and confirm button stock.\nERC is not hardware or fabrication approval." (at 292.1 185.42 0) (effects (font (size 1.27 1.27)) (justify left top)) (uuid "1df2bd9e-fbff-5047-92a9-09f33d7cd7ac"))
)
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