component
ESP32-C3-WROOM-02U-N4
Public Made by Adomby adom
Espressif Systems WiFi Modules, SMD-19P. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
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"type": "component",
"slug": "esp32-c3-wroom-02u-n4",
"title": "ESP32-C3-WROOM-02U-N4",
"brief": "Espressif Systems WiFi Modules, SMD-19P. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.0",
"license": "CC-BY-SA-4.0",
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"component": {
"mpn": "ESP32-C3-WROOM-02U-N4",
"manufacturer": "Espressif Systems",
"package": "SMD-19P",
"pin_count": 19,
"category": "IoT/Communication Modules",
"subcategory": "WiFi Modules",
"datasheet": "https://www.espressif.com/sites/default/files/documentation/esp32-c3-wroom-02_datasheet_en.pdf",
"parts": {
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"lbr": "esp32-c3-wroom-02u-n4.lbr"
},
"distributor_links": {
"lcsc": "C2926676",
"digikey": "1965-ESP32-C3-WROOM-02U-N4TR-ND",
"mouser": "356-ESP32C3WROM02UN4"
},
"distributor_check": {
"checked_at": "2026-10-28T17:24:46Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "1965-ESP32-C3-WROOM-02U-N4TR-ND",
"status": "found"
},
"mouser": {
"pn": "356-ESP32C3WROM02UN4",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "3V3",
"type": "power_in",
"description": "Module power supply pin; the datasheet gives no voltage limit for this pin in the pin definition table."
},
{
"number": "2",
"name": "EN",
"type": "input",
"description": "Chip enable: high turns the chip on, low powers the chip off, and the pin must not be left floating."
},
{
"number": "3",
"name": "IO4",
"type": "bidirectional",
"description": "GPIO4, also available as ADC1_CH4, FSPIHD and MTMS."
},
{
"number": "4",
"name": "IO5",
"type": "bidirectional",
"description": "GPIO5, also available as ADC2_CH0, FSPIWP and MTDI."
},
{
"number": "5",
"name": "IO6",
"type": "bidirectional",
"description": "GPIO6, also available as FSPICLK and MTCK."
},
{
"number": "6",
"name": "IO7",
"type": "bidirectional",
"description": "GPIO7, also available as FSPID and MTDO."
},
{
"number": "7",
"name": "IO8",
"type": "bidirectional",
"description": "GPIO8, a strapping pin that sets chip boot mode and ROM message printing; it is floating by default."
},
{
"number": "8",
"name": "IO9",
"type": "bidirectional",
"description": "GPIO9, a strapping pin that sets chip boot mode; it has a weak pull-up by default (bit value 1)."
},
{
"number": "9",
"name": "GND",
"type": "power_in",
"description": "Ground pin of the module."
},
{
"number": "10",
"name": "IO10",
"type": "bidirectional",
"description": "GPIO10, also available as FSPICS0."
},
{
"number": "11",
"name": "RXD",
"type": "bidirectional",
"description": "GPIO20, also used as U0RXD (UART0 receive) for firmware download and log output."
},
{
"number": "12",
"name": "TXD",
"type": "bidirectional",
"description": "GPIO21, also used as U0TXD (UART0 transmit) for firmware download and log output."
},
{
"number": "13",
"name": "IO18",
"type": "bidirectional",
"description": "GPIO18, also used as USB_D- for the USB Serial/JTAG controller."
},
{
"number": "14",
"name": "IO19",
"type": "bidirectional",
"description": "GPIO19, also used as USB_D+ for the USB Serial/JTAG controller."
},
{
"number": "15",
"name": "IO3",
"type": "bidirectional",
"description": "GPIO3, also available as ADC1_CH3."
},
{
"number": "16",
"name": "IO2",
"type": "bidirectional",
"description": "GPIO2, also available as ADC1_CH2 and FSPIQ, and it is a strapping pin for chip boot mode that is floating by default."
},
{
"number": "17",
"name": "IO1",
"type": "bidirectional",
"description": "GPIO1, also available as ADC1_CH1 and XTAL_32K_N."
},
{
"number": "18",
"name": "IO0",
"type": "bidirectional",
"description": "GPIO0, also available as ADC1_CH0 and XTAL_32K_P."
},
{
"number": "19",
"name": "GND",
"type": "power_in",
"description": "Ground pin, which is the exposed pad (EPAD); soldering it to the base-board ground is optional and improves thermal performance when done with the correct amount of paste."
}
],
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"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 datasheet does not use the name SMD-19P. It says the module has 19 pins (Section 3.2), so the pa; The N4 variant (ESP32-C3-WROOM-02U-N4, 4 MB Quad SPI flash, -40 to 85 C) appears in Table 1-2. The p; Pin 19 is listed as GND in Table 3-1 and as EPAD 19 in Figure 9-1, so it is recorded as one GND pin."
],
"pages_sent": 22,
"cost_usd": 0.0804,
"at": "2026-10-28T17:24:04"
},
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"url": "https://www.espressif.com/sites/default/files/documentation/esp32-c3-wroom-02_datasheet_en.pdf",
"pages": 47,
"sha256": "2375b1be75ebbfcf",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 19,
"described": 19,
"cites_pages": true,
"refuses_to_fabricate": true
}
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"metadata": {
"specs": {
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"Package": "SMD-19P",
"Category": "IoT/Communication Modules",
"Pins": "19"
},
"appearance": {
"contacts": {
"quote": "Solder: Sn-Ag-Cu (SAC305) lead-free solder Temperature (°C)",
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"plating": "tin"
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"name": "Storage temperature",
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{
"name": "Power supply voltage",
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{
"name": "Current delivered by external power supply",
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{
"name": "Operating ambient temperature",
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"unit": "°C",
"min": -40,
"typ": null,
"max": 85,
"conditions": "85 °C version",
"source_page": 22,
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{
"name": "Chip reset voltage (CHIP_EN voltage is within the specified range)",
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{
"name": "High-level input current",
"symbol": "IIH",
"kind": "electrical",
"unit": "nA",
"min": null,
"typ": null,
"max": 50,
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"source_page": 22,
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"min": null,
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{
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"source_page": 24,
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{
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{
"name": "Maximum clock frequency",
"symbol": "FC",
"kind": "electrical",
"unit": "MHz",
"min": 80,
"typ": null,
"max": null,
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"source_page": 24,
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{
"name": "Program/erase cycles",
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"kind": "electrical",
"unit": "cycles",
"min": 100000,
"typ": null,
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{
"name": "Data retention time",
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"min": 20,
"typ": null,
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{
"name": "Page program time",
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{
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{
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"source_page": 22,
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