EByte E103-W08A 2.4GHz WiFi 802.11b ARM Cortex-M3 UART Module
EByte E103-W08A 2.4GHz WiFi 802.11b ARM Cortex-M3 UART Module - Image 2
SKU: IOWC-1738
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EByte E103-W08A 2.4GHz WiFi 802.11b ARM Cortex-M3 UART Module

₹319.00 (Inclusive of all taxes)
Out of Stock

The EByte E103-W08A is a low-power 2.4GHz WiFi-to-UART module featuring an ARM Cortex-M3 processor for reliable TCP, HTTP, and MQTT communication. Operating from 2.5-3.6V, it supports AT command configuration and BLE-assisted provisioning for simplified IoT network integration.

Features

  • ARM Cortex-M3 Core: Dedicated application processor ensures stable, reliable performance for handling network protocols and user applications independently from the WiFi link layer.
  • Ultra-Low Power Modes: Achieves a sleep current as low as 18µA while maintaining WiFi connection, enabling long-term battery-powered IoT deployments.
  • Industrial-Grade WiFi: Supports 802.11b standard with WPA/WPA2 security, TCP/HTTP/MQTT protocols, and up to 4 simultaneous socket connections for robust data transfer.
  • Integrated PCB Antenna: The E103-W08A variant includes a built-in PCB antenna, simplifying board design and reducing external component count.
  • BLE-Assisted Provisioning: Features Bluetooth Low Energy for fast and convenient WiFi network distribution (AP connection), streamlining the setup process.

Out of stock

Description

The E103-W08A is an industrial-grade WiFi module engineered for reliable serial-to-WiFi conversion in embedded systems. Its architecture utilizes a dedicated ARM Cortex-M3 application processor paired with a separate link controller, ensuring stable management of network connections and application-layer logic. This separation enhances reliability for demanding IoT scenarios.

Operating across the full 2.412-2.472GHz band with a configurable TX power up to 12dBm, the module provides robust wireless connectivity. It is designed for low-power operation, supporting multi-level power adjustment that allows developers to optimize current consumption down to 120µA while connected, making it ideal for sensor nodes and remote telemetry units. The module’s firmware supports transparent transmission boot, AT command configuration, and seamless integration with common IoT communication stacks.

Key Features

  • IEEE 802.11b compliant WiFi Station with integrated ARM Cortex-M3 application processor.
  • Supports WPA and WPA2 Personal encryption for secure wireless communications.
  • Integrated TCP/IP stack supporting TCP Client, HTTP Client, and MQTT protocol for cloud connectivity.
  • AT command interface for easy parameter configuration, network connection control, and firmware updates.
  • Bluetooth Low Energy (BLE 5.1) co-processor for fast, smartphone-assisted WiFi provisioning and distribution.
  • Ultra-low power architecture with deep sleep current of 18µA and configurable active power modes.
  • Hardware supports up to 4 concurrent socket connections for multi-device communication.
  • Industrial operating temperature range (-40°C to +85°C) ensures reliability in harsh environments.

Applications

  • Industrial IoT (IIoT) Telemetry: Remote monitoring of sensors and equipment via WiFi with MQTT or TCP data transmission to cloud platforms.
  • Smart Home Automation: Enabling legacy serial devices or microcontrollers for wireless control and integration into home networks.
  • Battery-Powered Sensor Nodes: Low-power environmental monitoring (temperature, humidity, air quality) with periodic WiFi data uploads.
  • Wireless Serial Adapters: Converting RS-232/RS-485 serial communication to WiFi for remote access and network-enabled serial devices.
  • Prototyping & Development: Rapid integration of WiFi connectivity into embedded projects using simple AT commands over UART.

Technical Specifications

Model / VariantE103-W08A (PCB Antenna)
Wireless ProtocolIEEE 802.11b
Frequency Range2.412GHz - 2.472GHz
RF Transmit PowerUp to 12 dBm
Receiver SensitivityApprox. -90 dBm (for 802.11b)
Supply Voltage2.5V - 3.6V DC
Operating Current (Tx)130 mA (typical)
Operating Current (Rx)18 mA (typical)
Sleep Current18 µA (typical, WiFi connected)
Main ProcessorARM Cortex-M3
Host InterfaceUART (3.3V logic)
Antenna TypeIntegrated PCB Antenna
Network SecurityWPA, WPA2
Supported ProtocolsTCP, HTTP, MQTT
Operating Temperature-40°C to +85°C
Dimensions (LxWxH)Approx. 6.0 x 6.0 x 1.0 cm

Frequently Asked Questions

What is the primary interface for communicating with the E103-W08A module?

The primary host interface is a 3.3V logic-level UART (Serial). You connect your microcontroller's TX/RX pins to the module's corresponding RX/TX pins. All configuration and data transmission is managed through a comprehensive set of AT commands sent over this serial connection, allowing for network setup, connection management, and data sending/receiving.

How do I configure the WiFi network credentials on this module?

Network credentials are configured via AT commands. You can use standard AT commands like AT+CWJAP to join an Access Point. For easier end-user setup, the module supports BLE-assisted provisioning. In this mode, it broadcasts a BLE service, allowing a smartphone app to send the WiFi SSID and password directly to the module, simplifying the distribution network process without requiring serial commands from the main host MCU.

What is the power supply requirement and how do I minimize current consumption?

The module requires a stable 2.5V to 3.6V DC power supply. To minimize consumption, utilize the built-in low-power modes via AT commands. You can put the module into a light sleep mode while maintaining the WiFi association, which draws around 120µA, or a deeper sleep (AT+GSLP) which can reduce current further. Always ensure your power regulator can supply the ~130mA peak current required during transmission bursts.

Can the E103-W08A function as an HTTP client or MQTT client for cloud communication?

Yes, the integrated TCP/IP stack and AT command set support both HTTP Client and MQTT protocols. For HTTP, you use commands like AT+HTTPGET to request data from a web server. For MQTT, specific AT commands (e.g., AT+MQTT) allow you to connect to a broker, subscribe to topics, and publish sensor data. This enables direct integration with cloud platforms like AWS IoT, Azure, or private MQTT servers without external libraries on your main MCU.

What is the difference between the E103-W08A and E103-W08B variants?

The hardware and firmware are identical except for the antenna implementation. The E103-W08A variant features an integrated PCB antenna etched onto the module itself, requiring no external components. The E103-W08B variant omits the PCB antenna and instead provides an IPEX (u.FL) connector for attaching an external antenna, which can offer better range or directional gain. Choose W08A for compact designs and W08B for applications requiring specific antenna placement or higher gain.

Package Includes

  • 1 x EByte E103-W08A WiFi Module (SMD)

Additional Information

Weight 0.005 kg
Dimensions 6 × 6 × 1 cm

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