Initial release: ESP32-C3 CO2 & environment sensor board

KiCad 10 design (schematic, 2-layer layout, custom symbols and footprints),
fabrication data for PCBWay (Gerber X2, Excellon, job file), BOM, generated
documentation (schematic PDF, layer plots, 3D render) and firmware notes.

gerber/esp+sensair-B_Silkscreen.gbr

@@ -0,0 +1,15 @@
+G04 #@! TF.GenerationSoftware,KiCad,Pcbnew,10.0.6*
+G04 #@! TF.CreationDate,2026-09-08T00:42:25+02:00*
+G04 #@! TF.ProjectId,esp+sensair,6573702b-7365-46e7-9361-69722e6b6963,rev?*
+G04 #@! TF.SameCoordinates,Original*
+G04 #@! TF.FileFunction,Legend,Bot*
+G04 #@! TF.FilePolarity,Positive*
+%FSLAX46Y46*%
+G04 Gerber Fmt 4.6, Leading zero omitted, Abs format (unit mm)*
+G04 Created by KiCad (PCBNEW 10.0.6) date 2026-09-08 00:42:25*
+%MOMM*%
+%LPD*%
+G01*
+G04 APERTURE LIST*
+G04 APERTURE END LIST*
+M02*

gerber/esp+sensair-Edge_Cuts.gbr

@@ -0,0 +1,34 @@
+G04 #@! TF.GenerationSoftware,KiCad,Pcbnew,10.0.6*
+G04 #@! TF.CreationDate,2026-09-08T00:42:25+02:00*
+G04 #@! TF.ProjectId,esp+sensair,6573702b-7365-46e7-9361-69722e6b6963,rev?*
+G04 #@! TF.SameCoordinates,Original*
+G04 #@! TF.FileFunction,Profile,NP*
+%FSLAX46Y46*%
+G04 Gerber Fmt 4.6, Leading zero omitted, Abs format (unit mm)*
+G04 Created by KiCad (PCBNEW 10.0.6) date 2026-09-08 00:42:25*
+%MOMM*%
+%LPD*%
+G01*
+G04 APERTURE LIST*
+G04 #@! TA.AperFunction,Profile*
+%ADD10C,0.050000*%
+G04 #@! TD*
+G04 APERTURE END LIST*
+D10*
+X126300000Y-67000000D02*
+X99500000Y-67000000D01*
+X126300000Y-50500000D02*
+X126300000Y-67000000D01*
+X126300000Y-50500000D02*
+X138500000Y-50500000D01*
+X99500000Y-50500000D02*
+X99500000Y-67000000D01*
+X88500000Y-50500000D02*
+X99500000Y-50500000D01*
+X88500000Y-90500000D02*
+X88500000Y-50500000D01*
+X138500000Y-90500000D02*
+X88500000Y-90500000D01*
+X138500000Y-50500000D02*
+X138500000Y-90500000D01*
+M02*

gerber/esp+sensair-NPTH.drl

@@ -0,0 +1,6 @@
+M48
+INCH,TZ
+%
+G90
+G05
+M30

gerber/esp+sensair-PTH.drl

@@ -0,0 +1,51 @@
+M48
+INCH,TZ
+T1C0.0315
+T2C0.0394
+T3C0.0433
+%
+G90
+G05
+T1
+X35558Y-28343
+X35558Y-34343
+X36558Y-28343
+X36558Y-34343
+X37558Y-28343
+X37558Y-34343
+X38504Y-20520
+X38504Y-21520
+X38504Y-22520
+X38504Y-23520
+X38558Y-28343
+X38558Y-34343
+X39558Y-28343
+X39558Y-34343
+X40558Y-28343
+X40558Y-34343
+X41558Y-28343
+X41558Y-34343
+X42558Y-28343
+X42558Y-34343
+X44610Y-31563
+X44610Y-34563
+X50197Y-20520
+X50197Y-21520
+X50197Y-22520
+X50197Y-23520
+X50197Y-24520
+X50417Y-29587
+X50417Y-30587
+X50417Y-31587
+X50417Y-32587
+X50417Y-33587
+X50417Y-34587
+T2
+X45146Y-27953
+X45146Y-29921
+T3
+X50984Y-26280
+X50984Y-28051
+X53543Y-26280
+X53543Y-28051
+M30

gerber/esp+sensair-job.gbrjob

@@ -0,0 +1,147 @@
+{
+  "Header": {
+    "GenerationSoftware": {
+      "Vendor": "KiCad",
+      "Application": "Pcbnew",
+      "Version": "10.0.6"
+    },
+    "CreationDate": "2026-09-08T00:42:25+02:00"
+  },
+  "GeneralSpecs": {
+    "ProjectId": {
+      "Name": "esp+sensair",
+      "GUID": "6573702b-7365-46e7-9361-69722e6b6963",
+      "Revision": "rev?"
+    },
+    "Size": {
+      "X": 50.05,
+      "Y": 40.05
+    },
+    "LayerNumber": 4,
+    "BoardThickness": 1.6002,
+    "Finish": "None"
+  },
+  "DesignRules": [
+    {
+      "Layers": "Outer",
+      "PadToPad": 0.15,
+      "PadToTrack": 0.15,
+      "TrackToTrack": 0.15,
+      "MinLineWidth": 0.4,
+      "TrackToRegion": 0.5,
+      "RegionToRegion": 0.5
+    },
+    {
+      "Layers": "Inner",
+      "PadToPad": 0.15,
+      "PadToTrack": 0.15,
+      "TrackToTrack": 0.15
+    }
+  ],
+  "FilesAttributes": [
+    {
+      "Path": "esp+sensair-Front.gbr",
+      "FileFunction": "Copper,L1,Top",
+      "FilePolarity": "Positive"
+    },
+    {
+      "Path": "esp+sensair-Back.gbr",
+      "FileFunction": "Copper,L4,Bot",
+      "FilePolarity": "Positive"
+    },
+    {
+      "Path": "esp+sensair-F_Silkscreen.gbr",
+      "FileFunction": "Legend,Top",
+      "FilePolarity": "Positive"
+    },
+    {
+      "Path": "esp+sensair-B_Silkscreen.gbr",
+      "FileFunction": "Legend,Bot",
+      "FilePolarity": "Positive"
+    },
+    {
+      "Path": "esp+sensair-F_Mask.gbr",
+      "FileFunction": "SolderMask,Top",
+      "FilePolarity": "Negative"
+    },
+    {
+      "Path": "esp+sensair-B_Mask.gbr",
+      "FileFunction": "SolderMask,Bot",
+      "FilePolarity": "Negative"
+    },
+    {
+      "Path": "esp+sensair-Edge_Cuts.gbr",
+      "FileFunction": "Profile",
+      "FilePolarity": "Positive"
+    }
+  ],
+  "MaterialStackup": [
+    {
+      "Type": "Legend",
+      "Name": "Top Silk Screen"
+    },
+    {
+      "Type": "SolderPaste",
+      "Name": "Top Solder Paste"
+    },
+    {
+      "Type": "SolderMask",
+      "Thickness": 0.01,
+      "Name": "Top Solder Mask"
+    },
+    {
+      "Type": "Copper",
+      "Thickness": 0.035,
+      "Name": "Front"
+    },
+    {
+      "Type": "Dielectric",
+      "Thickness": 0.4801,
+      "Material": "FR4",
+      "Name": "Front/In1.Cu",
+      "Notes": "Type: dielectric layer 1 (from Front to In1.Cu)"
+    },
+    {
+      "Type": "Copper",
+      "Thickness": 0.035,
+      "Name": "In1.Cu"
+    },
+    {
+      "Type": "Dielectric",
+      "Thickness": 0.4801,
+      "Material": "FR4",
+      "Name": "In1.Cu/In2.Cu",
+      "Notes": "Type: dielectric layer 2 (from In1.Cu to In2.Cu)"
+    },
+    {
+      "Type": "Copper",
+      "Thickness": 0.035,
+      "Name": "In2.Cu"
+    },
+    {
+      "Type": "Dielectric",
+      "Thickness": 0.4801,
+      "Material": "FR4",
+      "Name": "In2.Cu/Back",
+      "Notes": "Type: dielectric layer 3 (from In2.Cu to Back)"
+    },
+    {
+      "Type": "Copper",
+      "Thickness": 0.035,
+      "Name": "Back"
+    },
+    {
+      "Type": "SolderMask",
+      "Thickness": 0.01,
+      "Name": "Bottom Solder Mask"
+    },
+    {
+      "Type": "SolderPaste",
+      "Name": "Bottom Solder Paste"
+    },
+    {
+      "Type": "Legend",
+      "Name": "Bottom Silk Screen"
+    }
+  ]
+}