component
ESP32-C3-WROOM-02-H4
Public Made by Adomby adom
Espressif Systems WiFi Modules, ESP32-C3-WROOM-02. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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ESP32-C3-WROOM-02-H4
Espressif Systems · WiFi Modules · ESP32-C3-WROOM-02
ESP32-C3-WROOM-02-H4 from Espressif Systems, in a ESP32-C3-WROOM-02. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | 3V3 | power_in | Module power supply input; the extracted pages give no voltage range or current limit for this pin. |
| 2 | EN | input | Chip enable: high turns the chip on, low powers it off, and the pin must not be left floating. |
| 3 | IO4 | bidirectional | GPIO4 with ADC1_CH4, FSPIHD and MTMS alternate functions; no electrical limits are stated for this pin in the extracted text. |
| 4 | IO5 | bidirectional | GPIO5 with ADC2_CH0, FSPIWP and MTDI alternate functions; no electrical limits are stated for this pin in the extracted text. |
| 5 | IO6 | bidirectional | GPIO6 with FSPICLK and MTCK alternate functions; no electrical limits are stated for this pin in the extracted text. |
| 6 | IO7 | bidirectional | GPIO7 with FSPID and MTDO alternate functions; no electrical limits are stated for this pin in the extracted text. |
| 7 | IO8 | bidirectional | GPIO8, a chip boot-configuration strapping pin that also controls ROM message printing; default state is floating. |
| 8 | IO9 | bidirectional | GPIO9, a chip boot-mode strapping pin with a weak internal pull-up (default logic 1) at reset. |
| 9 | GND | power_in | Ground pin of the module. |
| 10 | IO10 | bidirectional | GPIO10 with FSPICS0 alternate function; no electrical limits are stated for this pin in the extracted text. |
| 11 | RXD | bidirectional | GPIO20 multiplexed as UART0 receive (U0RXD), used for firmware download and log output. |
| 12 | TXD | bidirectional | GPIO21 multiplexed as UART0 transmit (U0TXD), used for firmware download and log output. |
| 13 | IO18 | bidirectional | GPIO18 multiplexed with the USB D- signal of the USB Serial/JTAG controller. |
| 14 | IO19 | bidirectional | GPIO19 multiplexed with the USB D+ signal of the USB Serial/JTAG controller. |
| 15 | IO3 | bidirectional | GPIO3 with ADC1_CH3 alternate function; no electrical limits are stated for this pin in the extracted text. |
| 16 | IO2 | bidirectional | GPIO2 with ADC1_CH2 and FSPIQ alternate functions; it is a chip boot-mode strapping pin and is floating by default. |
| 17 | IO1 | bidirectional | GPIO1 with ADC1_CH1 and XTAL_32K_N alternate functions; no electrical limits are stated for this pin in the extracted text. |
| 18 | IO0 | bidirectional | GPIO0 with ADC1_CH0 and XTAL_32K_P alternate functions; no electrical limits are stated for this pin in the extracted text. |
| 19 | GND | power_in | Ground pin (also the exposed pad, EPAD); soldering it to the base-board ground is optional but improves thermal performance. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Espressif Systems |
| Package | ESP32-C3-WROOM-02 |
| Category | IoT/Communication Modules |
| Pins | 19 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Power supply voltage | VDD33 | -0.3 | 3.6 | V | 22 | ||
| Storage temperature | TSTORE | -40 | 105 | °C | 22 | ||
| Power supply voltage | VDD33 | 3 | 3.3 | 3.6 | V | 22 | |
| Current delivered by external power supply | IVDD | 0.5 | A | 22 | |||
| Operating ambient temperature | TA | -40 | 105 | °C | 105 °C version | 22 | |
| High-level input current | IIH | 50 | nA | 22 | |||
| Low-level input current | IIL | 50 | nA | 22 | |||
| Pin capacitance | CIN | 2 | pF | 22 | |||
| High-level source current | IOH | 40 | mA | VDD1 = 3.3 V, VOH >= 2.64 V, PAD_DRIVER = 3 | 22 | ||
| Low-level sink current | IOL | 28 | mA | VDD1 = 3.3 V, VOL = 0.495 V, PAD_DRIVER = 3 | 22 | ||
| Internal weak pull-up resistor | RPU | 45 | kΩ | 22 | |||
| Internal weak pull-down resistor | RPD | 45 | kΩ | 22 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | tin | Solder: Sn-Ag-Cu (SAC305) lead-free solder Temperature (°C) | 40 |
CAD (KiCad official)
- Symbol:
ESP32-C3-WROOM-02-H4 - Footprint:
PCM_Espressif:ESP32-C3-WROOM-02 - 3D model: ESP32-C3-WROOM-02 (KiCad packages3D, STEP)
- 3D model files:
esp32-c3-wroom-02-h4-etched.step/esp32-c3-wroom-02-h4-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);esp32-c3-wroom-02-h4.step/esp32-c3-wroom-02-h4.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Espressif Systems datasheet (47 pp, sha256
2375b1be75ebbfcf, retrieved 2026-10-28, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).
# ESP32-C3-WROOM-02-H4
**Espressif Systems** · WiFi Modules · ESP32-C3-WROOM-02
ESP32-C3-WROOM-02-H4 from Espressif Systems, in a ESP32-C3-WROOM-02. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
## Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | 3V3 | power_in | Module power supply input; the extracted pages give no voltage range or current limit for this pin. |
| 2 | EN | input | Chip enable: high turns the chip on, low powers it off, and the pin must not be left floating. |
| 3 | IO4 | bidirectional | GPIO4 with ADC1_CH4, FSPIHD and MTMS alternate functions; no electrical limits are stated for this pin in the extracted text. |
| 4 | IO5 | bidirectional | GPIO5 with ADC2_CH0, FSPIWP and MTDI alternate functions; no electrical limits are stated for this pin in the extracted text. |
| 5 | IO6 | bidirectional | GPIO6 with FSPICLK and MTCK alternate functions; no electrical limits are stated for this pin in the extracted text. |
| 6 | IO7 | bidirectional | GPIO7 with FSPID and MTDO alternate functions; no electrical limits are stated for this pin in the extracted text. |
| 7 | IO8 | bidirectional | GPIO8, a chip boot-configuration strapping pin that also controls ROM message printing; default state is floating. |
| 8 | IO9 | bidirectional | GPIO9, a chip boot-mode strapping pin with a weak internal pull-up (default logic 1) at reset. |
| 9 | GND | power_in | Ground pin of the module. |
| 10 | IO10 | bidirectional | GPIO10 with FSPICS0 alternate function; no electrical limits are stated for this pin in the extracted text. |
| 11 | RXD | bidirectional | GPIO20 multiplexed as UART0 receive (U0RXD), used for firmware download and log output. |
| 12 | TXD | bidirectional | GPIO21 multiplexed as UART0 transmit (U0TXD), used for firmware download and log output. |
| 13 | IO18 | bidirectional | GPIO18 multiplexed with the USB D- signal of the USB Serial/JTAG controller. |
| 14 | IO19 | bidirectional | GPIO19 multiplexed with the USB D+ signal of the USB Serial/JTAG controller. |
| 15 | IO3 | bidirectional | GPIO3 with ADC1_CH3 alternate function; no electrical limits are stated for this pin in the extracted text. |
| 16 | IO2 | bidirectional | GPIO2 with ADC1_CH2 and FSPIQ alternate functions; it is a chip boot-mode strapping pin and is floating by default. |
| 17 | IO1 | bidirectional | GPIO1 with ADC1_CH1 and XTAL_32K_N alternate functions; no electrical limits are stated for this pin in the extracted text. |
| 18 | IO0 | bidirectional | GPIO0 with ADC1_CH0 and XTAL_32K_P alternate functions; no electrical limits are stated for this pin in the extracted text. |
| 19 | GND | power_in | Ground pin (also the exposed pad, EPAD); soldering it to the base-board ground is optional but improves thermal performance. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Espressif Systems |
| Package | ESP32-C3-WROOM-02 |
| Category | IoT/Communication Modules |
| Pins | 19 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Power supply voltage | VDD33 | -0.3 | | 3.6 | V | | 22 |
| Storage temperature | TSTORE | -40 | | 105 | °C | | 22 |
| Power supply voltage | VDD33 | 3 | 3.3 | 3.6 | V | | 22 |
| Current delivered by external power supply | IVDD | 0.5 | | | A | | 22 |
| Operating ambient temperature | TA | -40 | | 105 | °C | 105 °C version | 22 |
| High-level input current | IIH | | | 50 | nA | | 22 |
| Low-level input current | IIL | | | 50 | nA | | 22 |
| Pin capacitance | CIN | | 2 | | pF | | 22 |
| High-level source current | IOH | | 40 | | mA | VDD1 = 3.3 V, VOH >= 2.64 V, PAD_DRIVER = 3 | 22 |
| Low-level sink current | IOL | | 28 | | mA | VDD1 = 3.3 V, VOL = 0.495 V, PAD_DRIVER = 3 | 22 |
| Internal weak pull-up resistor | RPU | | 45 | | kΩ | | 22 |
| Internal weak pull-down resistor | RPD | | 45 | | kΩ | | 22 |
## Materials and finish
As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | | tin | Solder: Sn-Ag-Cu (SAC305) lead-free solder Temperature (°C) | 40 |
## CAD (KiCad official)
- Symbol: `ESP32-C3-WROOM-02-H4`
- Footprint: `PCM_Espressif:ESP32-C3-WROOM-02`
- 3D model: ESP32-C3-WROOM-02 (KiCad packages3D, STEP)
- 3D model files: `esp32-c3-wroom-02-h4-etched.step` / `esp32-c3-wroom-02-h4-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `esp32-c3-wroom-02-h4.step` / `esp32-c3-wroom-02-h4.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Espressif Systems datasheet](https://www.espressif.com/sites/default/files/documentation/esp32-c3-wroom-02_datasheet_en.pdf) (47 pp, sha256 `2375b1be75ebbfcf`, retrieved 2026-10-28, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).
[Datasheet PDF](docs/esp32-c3-wroom-02-h4-datasheet.pdf)