ESP32-S2-SOLO-U-N4R2

{
  "schema_version": 1,
  "type": "component",
  "slug": "esp32-s2-solo-u-n4r2",
  "title": "ESP32-S2-SOLO-U-N4R2",
  "brief": "Espressif Systems RF and Wireless, 40-SMD Module. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "rf and wireless",
    "esp32-s2-solo-u-n4r2",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "ESP32-S2-SOLO-U-N4R2",
    "manufacturer": "Espressif Systems",
    "package": "40-SMD Module",
    "pin_count": 41,
    "category": "RF and Wireless",
    "subcategory": "RF and Wireless",
    "datasheet": "https://www.espressif.com/sites/default/files/documentation/esp32-s2-solo_esp32-s2-solo-u_datasheet_en.pdf",
    "parts": {
      "symbol": "esp32-s2-solo-u-n4r2.kicad_sym",
      "footprint": "esp32-s2-solo-u-n4r2.kicad_mod",
      "model_3d": "esp32-s2-solo-u-n4r2-etched.glb",
      "model_3d_plain": "esp32-s2-solo-u-n4r2.glb",
      "model_3d_step": "esp32-s2-solo-u-n4r2-etched.step",
      "model_3d_step_plain": "esp32-s2-solo-u-n4r2.step",
      "lbr": "esp32-s2-solo-u-n4r2.lbr"
    },
    "distributor_links": {
      "digikey": "1965-ESP32-S2-SOLO-U-N4R2TR-ND",
      "mouser": "356-ESP32S2SOLOUN4R2"
    },
    "distributor_check": {
      "checked_at": "2026-10-28T17:47:09Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "1965-ESP32-S2-SOLO-U-N4R2TR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "356-ESP32S2SOLOUN4R2",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin of the module."
      },
      {
        "number": "2",
        "name": "3V3",
        "type": "power_in",
        "description": "Module power supply input; the datasheet's recommended supply range is 3.0 V to 3.6 V with 3.3 V typical."
      },
      {
        "number": "3",
        "name": "EN",
        "type": "input",
        "description": "Chip enable: high enables the chip and low powers it off, and the pin must not be left floating."
      },
      {
        "number": "4",
        "name": "IO4",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing RTC_GPIO4, TOUCH4 and ADC1_CH3 functions."
      },
      {
        "number": "5",
        "name": "IO5",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing RTC_GPIO5, TOUCH5 and ADC1_CH4 functions."
      },
      {
        "number": "6",
        "name": "IO6",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing RTC_GPIO6, TOUCH6 and ADC1_CH5 functions."
      },
      {
        "number": "7",
        "name": "IO7",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing RTC_GPIO7, TOUCH7 and ADC1_CH6 functions."
      },
      {
        "number": "8",
        "name": "IO15",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing RTC_GPIO15, U0RTS, ADC2_CH4 and XTAL_32K_P functions."
      },
      {
        "number": "9",
        "name": "IO16",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing RTC_GPIO16, U0CTS, ADC2_CH5 and XTAL_32K_N functions."
      },
      {
        "number": "10",
        "name": "IO17",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing RTC_GPIO17, U1TXD, ADC2_CH6 and DAC_1 functions."
      },
      {
        "number": "11",
        "name": "IO18",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing RTC_GPIO18, U1RXD, ADC2_CH7, DAC_2 and CLK_OUT3 functions."
      },
      {
        "number": "12",
        "name": "IO8",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing RTC_GPIO8, TOUCH8 and ADC1_CH7 functions."
      },
      {
        "number": "13",
        "name": "IO19",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing RTC_GPIO19, U1RTS, ADC2_CH8, CLK_OUT2 and USB_D- functions."
      },
      {
        "number": "14",
        "name": "IO20",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing RTC_GPIO20, U1CTS, ADC2_CH9, CLK_OUT1 and USB_D+ functions."
      },
      {
        "number": "15",
        "name": "IO3",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing RTC_GPIO3, TOUCH3 and ADC1_CH2 functions."
      },
      {
        "number": "16",
        "name": "IO46",
        "type": "input",
        "description": "Input-only GPIO46 that also serves as a strapping pin controlling ROM message printing (default pull-down, bit value 0)."
      },
      {
        "number": "17",
        "name": "IO9",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing RTC_GPIO9, TOUCH9, ADC1_CH8 and FSPIHD functions."
      },
      {
        "number": "18",
        "name": "IO10",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing RTC_GPIO10, TOUCH10, ADC1_CH9, FSPICS0 and FSPIIO4 functions."
      },
      {
        "number": "19",
        "name": "IO11",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing RTC_GPIO11, TOUCH11, ADC2_CH0, FSPID and FSPIIO5 functions."
      },
      {
        "number": "20",
        "name": "IO12",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing RTC_GPIO12, TOUCH12, ADC2_CH1, FSPICLK and FSPIIO6 functions."
      },
      {
        "number": "21",
        "name": "IO13",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing RTC_GPIO13, TOUCH13, ADC2_CH2, FSPIQ and FSPIIO7 functions."
      },
      {
        "number": "22",
        "name": "IO14",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing RTC_GPIO14, TOUCH14, ADC2_CH3, FSPIWP and FSPIDQS functions."
      },
      {
        "number": "23",
        "name": "IO21",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing the RTC_GPIO21 function."
      },
      {
        "number": "24",
        "name": "IO33",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing SPIIO4 and FSPIHD functions."
      },
      {
        "number": "25",
        "name": "IO34",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing SPIIO5 and FSPICS0 functions."
      },
      {
        "number": "26",
        "name": "IO45",
        "type": "bidirectional",
        "description": "General-purpose I/O that also serves as a strapping pin controlling VDD_SPI voltage (default pull-down, bit value 0)."
      },
      {
        "number": "27",
        "name": "IO0",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing RTC_GPIO0; it is a strapping pin controlling chip boot mode (default pull-up, bit value 1)."
      },
      {
        "number": "28",
        "name": "IO35",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing SPIIO6 and FSPID functions."
      },
      {
        "number": "29",
        "name": "IO36",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing SPIIO7 and FSPICLK functions."
      },
      {
        "number": "30",
        "name": "IO37",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing SPIDQS and FSPIQ functions."
      },
      {
        "number": "31",
        "name": "IO38",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing the FSPIWP function."
      },
      {
        "number": "32",
        "name": "IO39",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing MTCK and CLK_OUT3 functions."
      },
      {
        "number": "33",
        "name": "IO40",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing MTDO and CLK_OUT2 functions."
      },
      {
        "number": "34",
        "name": "IO41",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing MTDI and CLK_OUT1 functions."
      },
      {
        "number": "35",
        "name": "IO42",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing the MTMS function."
      },
      {
        "number": "36",
        "name": "RXD0",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing the U0RXD (UART0 receive) function, GPIO44 and CLK_OUT2."
      },
      {
        "number": "37",
        "name": "TXD0",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing the U0TXD (UART0 transmit) function, GPIO43 and CLK_OUT1."
      },
      {
        "number": "38",
        "name": "IO2",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing RTC_GPIO2, TOUCH2 and ADC1_CH1 functions."
      },
      {
        "number": "39",
        "name": "IO1",
        "type": "bidirectional",
        "description": "General-purpose I/O also providing RTC_GPIO1, TOUCH1 and ADC1_CH0 functions."
      },
      {
        "number": "40",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin of the module."
      },
      {
        "number": "41",
        "name": "EPAD",
        "type": "power_in",
        "description": "Exposed ground pad; soldering it to the base-board ground is optional and can improve thermal performance if the paste amount is controlled."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The supplied package hint says 40 pins, but the datasheet states 'The module has 41 pins' (Table 3 l; The datasheet covers both ESP32-S2-SOLO and ESP32-S2-SOLO-U and the pin table (Table 3) is shared. T; The datasheet type column uses I/O/T (T = high impedance per footnote). These were mapped to KiCad '"
        ],
        "pages_sent": 20,
        "cost_usd": 0.0735,
        "at": "2026-10-28T17:47:35"
      },
      "datasheet": {
        "url": "https://www.espressif.com/sites/default/files/documentation/esp32-s2-solo_esp32-s2-solo-u_datasheet_en.pdf",
        "pages": 34,
        "sha256": "dbfee97a9809455c",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 41,
        "described": 41,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "esp32-s2-solo-u-n4r2.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          18,
          25.5,
          3.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 3.77,
        "footprint_binding": "identity",
        "sha256": "98b1af187c98047964186c7d25224c0d8b7396e4912b1b81824278702a906953",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "esp32-s2-solo-u-n4r2-etched.step",
        "role": "eda",
        "up": "Z",
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        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
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        "centre_offset_mm": 3.77,
        "footprint_binding": "identity",
        "sha256": "68932d37033b4c75733e6e68350a9eb67860fc47b8c7ed67dc377c4fe6ab3293",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Espressif Systems",
      "Package": "40-SMD Module",
      "Category": "RF and Wireless",
      "Pins": "41"
    },
    "appearance": {
      "contacts": {
        "quote": "Solder — Sn-Ag-Cu (SAC305) lead-free solder alloy Figure 13: Reflow Profile",
        "page": 28,
        "doc": "ds.pdf",
        "plating": "tin"
      },
      "version": 1,
      "datasheet_sha256": "dbfee97a9809455c5b0b5de88e3e55a64885d21f0fd56891261a8b790aac3ed6"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "dbfee97a9809455c5b0b5de88e3e55a64885d21f0fd56891261a8b790aac3ed6",
      "rows": [
        {
          "name": "Power supply voltage",
          "symbol": "VDD33",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 3.6,
          "conditions": "",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature",
          "symbol": "TSTORE",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 105,
          "conditions": "",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Power supply voltage",
          "symbol": "VDD33",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 3,
          "typ": 3.3,
          "max": 3.6,
          "conditions": "",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Current delivered by external power supply",
          "symbol": "IVDD",
          "kind": "recommended_operating",
          "unit": "A",
          "min": 0.5,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Operating ambient temperature",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "85 °C version",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Low-level input voltage",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "High-level input current",
          "symbol": "IIH",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Low-level input current",
          "symbol": "IIL",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Chip reset voltage",
          "symbol": "VIL_nRST",
          "kind": "electrical",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "TX EVM limit",
          "symbol": "",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": null,
          "max": -10,
          "conditions": "802.11b, 1 Mbps, DSSS",
          "source_page": 18,
          "source": "datasheet"
        },
        {
          "name": "TX EVM limit",
          "symbol": "",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": null,
          "max": -5,
          "conditions": "802.11g, 6 Mbps, OFDM",
          "source_page": 18,
          "source": "datasheet"
        },
        {
          "name": "TX EVM limit",
          "symbol": "",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": null,
          "max": -25,
          "conditions": "802.11g, 54 Mbps, OFDM",
          "source_page": 18,
          "source": "datasheet"
        },
        {
          "name": "TX EVM limit",
          "symbol": "",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": null,
          "max": -27,
          "conditions": "802.11n, HT20, MCS7",
          "source_page": 18,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_triggers": [
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  "discovery_pitch": "ESP32-S2-SOLO-U-N4R2 (Espressif Systems) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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