ESP32-S2-SOLO-N4

{
  "slug": "esp32-s2-solo-n4",
  "version": "0.1.0",
  "type": "component",
  "description": "Espressif Systems RF and Wireless, 40-SMD Module. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "rf and wireless",
    "esp32-s2-solo-n4",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "esp32-s2-solo-n4.kicad_sym",
    "esp32-s2-solo-n4.kicad_mod",
    "esp32-s2-solo-n4.glb",
    "esp32-s2-solo-n4.step",
    "esp32-s2-solo-n4.lbr",
    "docs/hero.png",
    "docs/esp32-s2-solo-n4-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "component": {
    "mpn": "ESP32-S2-SOLO-N4",
    "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-n4.kicad_sym",
      "footprint": "esp32-s2-solo-n4.kicad_mod",
      "model_3d": "esp32-s2-solo-n4-etched.glb",
      "model_3d_plain": "esp32-s2-solo-n4.glb",
      "model_3d_step": "esp32-s2-solo-n4-etched.step",
      "model_3d_step_plain": "esp32-s2-solo-n4.step",
      "lbr": "esp32-s2-solo-n4.lbr"
    },
    "distributor_links": {
      "digikey": "1965-ESP32-S2-SOLO-N4TR-ND",
      "mouser": "356-ESP32-S2-SOLO-N4"
    },
    "distributor_check": {
      "checked_at": "2026-10-28T17:49:11Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "1965-ESP32-S2-SOLO-N4TR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "356-ESP32-S2-SOLO-N4",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference pin of the module."
      },
      {
        "number": "2",
        "name": "3V3",
        "type": "power_in",
        "description": "Module 3.3 V supply pin; Table 10 gives VDD33 as 3.0 V minimum, 3.3 V typical and 3.6 V maximum."
      },
      {
        "number": "3",
        "name": "EN",
        "type": "input",
        "description": "High enables the chip and low powers it off, and the pin must not be left floating."
      },
      {
        "number": "4",
        "name": "IO4",
        "type": "bidirectional",
        "description": "GPIO4 with alternate functions RTC_GPIO4, TOUCH4 and ADC1_CH3."
      },
      {
        "number": "5",
        "name": "IO5",
        "type": "bidirectional",
        "description": "GPIO5 with alternate functions RTC_GPIO5, TOUCH5 and ADC1_CH4."
      },
      {
        "number": "6",
        "name": "IO6",
        "type": "bidirectional",
        "description": "GPIO6 with alternate functions RTC_GPIO6, TOUCH6 and ADC1_CH5."
      },
      {
        "number": "7",
        "name": "IO7",
        "type": "bidirectional",
        "description": "GPIO7 with alternate functions RTC_GPIO7, TOUCH7 and ADC1_CH6."
      },
      {
        "number": "8",
        "name": "IO15",
        "type": "bidirectional",
        "description": "GPIO15 with alternate functions RTC_GPIO15, U0RTS, ADC2_CH4 and XTAL_32K_P."
      },
      {
        "number": "9",
        "name": "IO16",
        "type": "bidirectional",
        "description": "GPIO16 with alternate functions RTC_GPIO16, U0CTS, ADC2_CH5 and XTAL_32K_N."
      },
      {
        "number": "10",
        "name": "IO17",
        "type": "bidirectional",
        "description": "GPIO17 with alternate functions RTC_GPIO17, U1TXD, ADC2_CH6 and DAC_1."
      },
      {
        "number": "11",
        "name": "IO18",
        "type": "bidirectional",
        "description": "GPIO18 with alternate functions RTC_GPIO18, U1RXD, ADC2_CH7, DAC_2 and CLK_OUT3."
      },
      {
        "number": "12",
        "name": "IO8",
        "type": "bidirectional",
        "description": "GPIO8 with alternate functions RTC_GPIO8, TOUCH8 and ADC1_CH7."
      },
      {
        "number": "13",
        "name": "IO19",
        "type": "bidirectional",
        "description": "GPIO19 with alternate functions RTC_GPIO19, U1RTS, ADC2_CH8, CLK_OUT2 and USB_D-."
      },
      {
        "number": "14",
        "name": "IO20",
        "type": "bidirectional",
        "description": "GPIO20 with alternate functions RTC_GPIO20, U1CTS, ADC2_CH9, CLK_OUT1 and USB_D+."
      },
      {
        "number": "15",
        "name": "IO3",
        "type": "bidirectional",
        "description": "GPIO3 with alternate functions RTC_GPIO3, TOUCH3 and ADC1_CH2."
      },
      {
        "number": "16",
        "name": "IO46",
        "type": "input",
        "description": "GPIO46, input-only pin that is also a strapping pin controlling boot mode and ROM message printing."
      },
      {
        "number": "17",
        "name": "IO9",
        "type": "bidirectional",
        "description": "GPIO9 with alternate functions RTC_GPIO9, TOUCH9, ADC1_CH8 and FSPIHD."
      },
      {
        "number": "18",
        "name": "IO10",
        "type": "bidirectional",
        "description": "GPIO10 with alternate functions RTC_GPIO10, TOUCH10, ADC1_CH9, FSPICS0 and FSPIIO4."
      },
      {
        "number": "19",
        "name": "IO11",
        "type": "bidirectional",
        "description": "GPIO11 with alternate functions RTC_GPIO11, TOUCH11, ADC2_CH0, FSPID and FSPIIO5."
      },
      {
        "number": "20",
        "name": "IO12",
        "type": "bidirectional",
        "description": "GPIO12 with alternate functions RTC_GPIO12, TOUCH12, ADC2_CH1, FSPICLK and FSPIIO6."
      },
      {
        "number": "21",
        "name": "IO13",
        "type": "bidirectional",
        "description": "GPIO13 with alternate functions RTC_GPIO13, TOUCH13, ADC2_CH2, FSPIQ and FSPIIO7."
      },
      {
        "number": "22",
        "name": "IO14",
        "type": "bidirectional",
        "description": "GPIO14 with alternate functions RTC_GPIO14, TOUCH14, ADC2_CH3, FSPIWP and FSPIDQS."
      },
      {
        "number": "23",
        "name": "IO21",
        "type": "bidirectional",
        "description": "GPIO21 with alternate function RTC_GPIO21."
      },
      {
        "number": "24",
        "name": "IO33",
        "type": "bidirectional",
        "description": "GPIO33 with alternate functions SPIIO4 and FSPIHD."
      },
      {
        "number": "25",
        "name": "IO34",
        "type": "bidirectional",
        "description": "GPIO34 with alternate functions SPIIO5 and FSPICS0."
      },
      {
        "number": "26",
        "name": "IO45",
        "type": "bidirectional",
        "description": "GPIO45, which is also a strapping pin that sets the VDD_SPI voltage at reset."
      },
      {
        "number": "27",
        "name": "IO0",
        "type": "bidirectional",
        "description": "GPIO0 with alternate function RTC_GPIO0; it is a strapping pin for chip boot mode with a default pull-up."
      },
      {
        "number": "28",
        "name": "IO35",
        "type": "bidirectional",
        "description": "GPIO35 with alternate functions SPIIO6 and FSPID."
      },
      {
        "number": "29",
        "name": "IO36",
        "type": "bidirectional",
        "description": "GPIO36 with alternate functions SPIIO7 and FSPICLK."
      },
      {
        "number": "30",
        "name": "IO37",
        "type": "bidirectional",
        "description": "GPIO37 with alternate functions SPIDQS and FSPIQ."
      },
      {
        "number": "31",
        "name": "IO38",
        "type": "bidirectional",
        "description": "GPIO38 with alternate function FSPIWP."
      },
      {
        "number": "32",
        "name": "IO39",
        "type": "bidirectional",
        "description": "GPIO39 with alternate functions MTCK and CLK_OUT3."
      },
      {
        "number": "33",
        "name": "IO40",
        "type": "bidirectional",
        "description": "GPIO40 with alternate functions MTDO and CLK_OUT2."
      },
      {
        "number": "34",
        "name": "IO41",
        "type": "bidirectional",
        "description": "GPIO41 with alternate functions MTDI and CLK_OUT1."
      },
      {
        "number": "35",
        "name": "IO42",
        "type": "bidirectional",
        "description": "GPIO42 with alternate function MTMS."
      },
      {
        "number": "36",
        "name": "RXD0",
        "type": "bidirectional",
        "description": "UART0 receive (U0RXD) with alternate functions GPIO44 and CLK_OUT2."
      },
      {
        "number": "37",
        "name": "TXD0",
        "type": "bidirectional",
        "description": "UART0 transmit (U0TXD) with alternate functions GPIO43 and CLK_OUT1; ROM messages print here by default."
      },
      {
        "number": "38",
        "name": "IO2",
        "type": "bidirectional",
        "description": "GPIO2 with alternate functions RTC_GPIO2, TOUCH2 and ADC1_CH1."
      },
      {
        "number": "39",
        "name": "IO1",
        "type": "bidirectional",
        "description": "GPIO1 with alternate functions RTC_GPIO1, TOUCH1 and ADC1_CH0."
      },
      {
        "number": "40",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin of the module."
      },
      {
        "number": "41",
        "name": "EPAD",
        "type": "power_in",
        "description": "Exposed ground thermal pad; soldering it to the base-board ground optimizes thermal performance, applying the correct amount of solder paste."
      }
    ],
    "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: Package hint says 40-SMD, but the datasheet states the module has 41 pins: 40 numbered pads plus EPA; The datasheet covers the ESP32-S2-SOLO (ANT) family, which includes ESP32-S2-SOLO-N4. Table 1 and th; Pin 13 is printed as 'USB_D' followed by a line-break hyphen in the text. I read it as USB_D- becaus",
          "1/41 pins cited to the wrong page (name found elsewhere): ['2:3V3@p15']"
        ],
        "pages_sent": 20,
        "cost_usd": 0.074,
        "at": "2026-10-28T17:49:42"
      },
      "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-n4.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          18.0,
          25.5,
          3.1
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 3.77,
        "footprint_binding": "identity",
        "sha256": "b2b7ce42127ef78939eaf14175b1b084b3f478f0527b83f1b1db385daa60bfdf",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "esp32-s2-solo-n4-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          18.0,
          25.5,
          3.1
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 3.77,
        "footprint_binding": "identity",
        "sha256": "02ef1745ee0d97549df7df99e7de0cfc2bc5db9da6cb16550b527d440aa12bf5",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}