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Five small green circuit boards with pin headers and chips

LORDWORLD

LORDWORLD Eport-E20 Serial-to-Ethernet Module 5pcs

SKU CH-J9ZC-E8Z3Y

Five serial-to-Ethernet modules with Cortex-M3 MCU, 128KB SRAM and 2MB Flash for embedded networking

  • Cortex-M3 MCU with 128KB SRAM for responsive embedded control
  • 2MB Flash stores firmware and configuration data locally
  • FreeRTOS real-time kernel enables deterministic task scheduling
  • 3V TTL serial interface connects directly to microcontroller logic levels
  • DHCP TCP/IP Telnet converter bridges serial devices to Ethernet networks

Embedded serial-to-Ethernet module

The LORDWORLD Eport-E20 converts TTL serial signals to Ethernet using a Cortex-M3 MCU with 128KB SRAM and 2MB Flash. It runs FreeRTOS and supports DHCP, TCP/IP and Telnet for networked device integration. Designed for engineers adding wired connectivity to legacy or custom hardware.

Low-power 3.3V operation

The module operates at 3.3V with minimal current draw, making it suitable for battery-backed or enclosed deployments. No active cooling is required and the solid-state design produces no audible noise. Stable thermal behaviour is maintained across continuous network traffic.

Five-unit pack for multi-node projects

This listing supplies five identical modules, enabling parallel development or redundant installation across several nodes. Single-unit buyers or projects needing only one converter should source individually. The quantity fixed at five defines the purchase.

Highlights

  • Cortex-M3 MCU with 128KB SRAM for responsive embedded control
  • 2MB Flash stores firmware and configuration data locally
  • FreeRTOS real-time kernel enables deterministic task scheduling
  • 3V TTL serial interface connects directly to microcontroller logic levels
  • DHCP TCP/IP Telnet converter bridges serial devices to Ethernet networks

Specifications

BrandLORDWORLD

Questions about this item

How do I wire the Eport-E20 module for 3.3 V TTL serial connection?

Connect the module's TTL pins to a 3.3 V logic-level UART; supplying 5 V on these pins will damage the Cortex-M3 MCU.

What firmware storage does the module use and can it be updated?

The module provides 2 MB of on-board Flash for the FreeRTOS image; updates are performed over the Ethernet link using the vendor's TFTP tool.

How many simultaneous TCP/IP sessions can the Cortex-M3 handle before latency rises?

With 128 KB SRAM the MCU typically sustains 10 concurrent sessions; beyond that buffer pressure increases round-trip time.

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