# Ai-WB2-01M

**Ai-Thinker** · WiFi Modules · DIP-18

Ai-WB2-01M from Ai-Thinker, in a DIP-18. 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 | GND | power_in | Ground reference pin for the module (datasheet function: 接地, ground). |
| 2 | VDD | power_in | 3.3V supply input; the datasheet recommends an external supply able to provide more than 500mA. |
| 3 | TX0 | output | UART0 transmit (TXD), also multiplexed as GPIO16, SPI_MOSI/MISO, IIC_SCL and PWM_CH1. |
| 4 | RX0 | input | UART0 receive (RXD), also multiplexed as GPIO7, SPI_SCLK, IIC_SDA and PWM_CH2. |
| 5 | IO20 | bidirectional | General-purpose I/O GPIO20, also multiplexed as SPI_MOSI/MISO, IIC_SCL and PWM_CH0. |
| 6 | IO12 | bidirectional | General-purpose I/O GPIO12, also multiplexed as SPI_MOSI/MISO, IIC_SCL, PWM_CH2 and ADC_CH0. |
| 7 | IO14 | bidirectional | General-purpose I/O GPIO14, also multiplexed as SPI_SS, IIC_SCL, PWM_CH4 and ADC_CH2. |
| 8 | 8/NC | unconnected | Default NC and not usable; if brought out, it supports Bootstrap/GPIO8/SPI_MOSI/MISO/IIC_SCL/PWM_CH3, and must be used only after contacting Ai-Thinker. At power-up, a high level enters burn mode while a low level boots normally. |
| 9 | EN | input | Default chip enable, active high. |
| 10 | IO4 | bidirectional | General-purpose I/O GPIO4, also multiplexed as SPI_MOSI/MISO, IIC_SCL, PWM_CH4 and ADC_CH4. |
| 11 | IO3 | bidirectional | General-purpose I/O GPIO3, also multiplexed as SPI_SCLK, IIC_SDA and PWM_CH3. |
| 12 | IO2 | bidirectional | General-purpose I/O GPIO2, also multiplexed as SPI_SS, IIC_SCL and PWM_CH2. |
| 13 | IO22 | bidirectional | General-purpose I/O GPIO22, also multiplexed as SPI_SS, IIC_SCL and PWM_CH2. |
| 14 | IO21 | bidirectional | General-purpose I/O GPIO21, also multiplexed as SPI_MOSI/MISO, IIC_SDA and PWM_CH1. |
| 15 | IO17 | bidirectional | General-purpose I/O GPIO17, also multiplexed as SPI_MOSI/MISO, IIC_SDA and PWM_CH2. |
| 16 | IO11 | bidirectional | General-purpose I/O GPIO11, also multiplexed as SPI_SCLK, IIC_SDA and ADC_CH10. |
| 17 | IO1 | bidirectional | General-purpose I/O GPIO1, also multiplexed as SPI_MOSI/MISO, IIC_SDA and PWM_CH1. |
| 18 | IO0 | bidirectional | General-purpose I/O GPIO0, also multiplexed as SPI_MOSI/MISO, IIC_SCL and PWM_CH0. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Ai-Thinker |
| Package | DIP-18 |
| Category | IoT/Communication Modules |
| Pins | 18 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| 供电电压 (supply voltage) | VDD | 2.7 | 3.3 | 3.6 | V |  | 7 |
| IMAX | IMAX |  |  | 15 | mA |  | 7 |
| 供电电流 (supply current, recommended) |  | 500 |  |  | mA | 供电电流 ≥500mA | 6 |
| 工作温度 (operating temperature) |  | -40 |  | 85 | ℃ |  | 6 |

## CAD (KiCad official)

- Symbol: `Ai-WB2-01M`
- Footprint: `Package_DIP:DIP-18_W7.62mm`
- 3D model: DIP-18 (KiCad packages3D, STEP)
- 3D model files: `ai-wb2-01m-etched.step` / `ai-wb2-01m-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ai-wb2-01m.step` / `ai-wb2-01m.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Ai-Thinker datasheet](docs/ai-wb2-01m-datasheet.pdf) (23 pp, sha256 `a83bcf50deb590fb`, retrieved 2026-10-28, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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/ai-wb2-01m-datasheet.pdf)