> For the complete documentation index, see [llms.txt](https://docs.acrome.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.acrome.net/smd-applications/boardoza-sensors/esp01m-wi-fi-module.md).

# ESP01M Wi-Fi Module

### Overview

The Boardoza ESP01M is a highly integrated, compact Wi-Fi SoC (System on Chip) solution driven by the high-performance ESP8266 core architecture. Engineered for robust IoT (Internet of Things) deployments, this module incorporates a full TCP/IP protocol stack and a high-efficiency 2.4 GHz transceiver, enabling seamless network bridging for embedded microcontrollers.

Designed with an ultra-small 18mm x 18mm footprint, the ESP01M minimizes PCB real estate requirements while offering flexible "Station" and "SoftAP" modes. It serves as a critical communication node for smart home automation, industrial telemetry, and low-power sensor networks.

<div align="left"><figure><img src="/files/xAbpuseKGP4ZH1abcGiI" alt="" width="375"><figcaption></figcaption></figure></div>

### Core Technical Specifications

The module is characterized by the following operational parameters:

* Core Architecture: Built upon the Tensilica L106 32-bit RISC processor, optimized for ultra-low power consumption and high-speed data processing.
* Operating Voltage: Supports a wide input range of 3.3V to 5V DC, facilitating direct integration with diverse logic levels.
* Wireless Standard: Compliant with IEEE 802.11 b/g/n protocols, operating strictly in the 2.4 GHz frequency band.
* Data Throughput: Capable of achieving physical layer (PHY) rates up to 72.2 Mbps in 802.11n mode.
* Communication Interface: primarily utilizes a high-speed UART (Universal Asynchronous Receiver-Transmitter) bus with a default baud rate of 74880 bps for boot logs and command interfacing.
* Thermal Endurance: Engineered to withstand harsh industrial environments ranging from -40°C to +85°C.
* Physical Dimensions: A compact square form factor measuring 20 mm x 20 mm.

### Key Engineering Features

#### Advanced Networking Modes

The ESP01M supports a versatile range of network topologies:

1. Station Mode (STA): Allows the module to connect to an existing Wi-Fi router as a client.
2. SoftAP Mode: Enables the module to act as a wireless access point for other devices.
3. Promiscuous Mode: Facilitates low-level packet sniffing for network analysis and security applications.
4. Virtual Wi-Fi Interfaces: Supports up to two simultaneous virtual Wi-Fi interfaces for complex routing scenarios.

#### Robust UART Integration

The module is designed as a serial-to-Wi-Fi bridge. By utilizing standard TX/RX lines, it allows any microcontroller with a UART port to offload the heavy lifting of TCP/IP processing, significantly reducing the computational load on the host MCU.

### Hardware Interface and Signal Mapping

The Boardoza ESP01M exposes a simplified 6-pin header interface designed for rapid prototyping and reliable connectivity:

Power Terminals

* 5V Pin: The positive power supply input, accepting a regulated voltage between 3.3V and 5V.
* GND Pin: The common ground reference for both power and logic signals.

Communication Bus

* TX Pin: UART Transmit line. Used to send data from the ESP01M to the host controller.
* RX Pin: UART Receive line. Used to receive commands and data from the host controller.

Control Logic

* RST Pin: External hardware reset input. Driving this pin low triggers a hard reset of the SoC.
* IO0 (GPIO0): A multi-functional pin used for boot mode selection. Pulling this pin LOW during power-up places the module into UART Download Mode (Flash Mode) for firmware updates.

### Mechanical Specifications

The module features a square 20 mm x 20 mm PCB outline. Mounting is typically achieved via standard 2.54mm pitch headers, making it compatible with breadboards and industry-standard sockets.

{% hint style="info" %}
Ready to integrate? You can purchase the **ESP01M Wi-Fi Module** directly from our [Online Store](https://www.robotshop.com/products/acrome-boardoza-esp-01m-wi-fi-module?qd=b2e8b31d6e5d83b6965b2c55bbf4b7e0). Worldwide shipping is available for engineering samples and production batches.
{% endhint %}

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