Product Overview
The EBYTE EWM103-WF7621A is a full-gigabit WiFi routing gateway module built on the MediaTek MT7621A dual-core MIPS processor. Running at 880 MHz with 128 MB DDR3 RAM and 32 MB Flash, it integrates a 5-port GbE switch, hardware NAT/HQoS/VPN accelerator, and supports the OpenWrt open-source OS for full secondary development. Designed for smart routers, industrial gateways, edge computing nodes, and cloud-connected IoT devices.
- MT7621A dual-core MIPS1004Kc @ 880 MHz
- 5 × 10/100/1000M adaptive Ethernet (1 WAN + 4 LAN default)
- 3 × PCIe + USB 3.0 + USB 2.0 expansion interfaces
- OpenWrt / custom Linux OS support
- Hardware HNAT, HQoS, Samba, VPN accelerator
- Compact SMD module: 50 × 50 × 3 mm, 11.1 g
Technical Specifications
| Parameter | Value | Remark |
|---|---|---|
| Chip Solution | MediaTek MT7621A | Dual-core MIPS1004Kc |
| CPU Frequency | 880 MHz (dual-core) | Hardware NAT/VPN accelerator |
| RAM | DDR3 128 MB | Customizable: 256 / 64 / 32 MB |
| Flash | 32 MB | Customizable: 16 / 8 MB |
| Operating Frequency | 2.4 GHz | — |
| Ethernet | 5 × GbE (10/100/1000M) | Default: 1 WAN + 4 LAN |
| PCIe | 3 × PCIe | For WiFi / LTE expansion |
| USB | USB 3.0 × 1 + USB 2.0 × 1 | Both host interfaces |
| UART | 3 × UART Lite | — |
| Other Interfaces | I²C / SPI / RGMII / MII | — |
| Operating System | OpenWrt / Custom Linux | Secondary development supported |
| Operating Voltage | 3.3 V DC | >3.5V may damage module |
| Supply Current | 500 mA (typical) | — |
| Operating Temperature | -20 °C to +60 °C | — |
| Storage Temperature | -40 °C to +85 °C | — |
| Humidity | 10–95% RH (no condensation) | — |
| Dimensions | 50 × 50 × 3 mm | ±0.2 mm tolerance |
| Weight | 11.1 g | ±0.2 g |
| Package | SMD (stamp-hole) | — |
Product Details
MT7621A High-Performance Dual-Core Processor
The MT7621A integrates two MIPS1004Kc cores at 880 MHz with dedicated hardware accelerators for NAT, HQoS, Samba file sharing, and VPN (IPSec/PPTP/L2TP). This offloads routing and security tasks from the CPU, enabling wire-speed gigabit throughput even under heavy multi-client loads — ideal for industrial edge gateways and smart router applications.
Rich Interface Expansion: PCIe × 3 + USB + GbE Switch
Three PCIe slots support simultaneous expansion of 2.4/5GHz WiFi cards and 4G/5G LTE modules. The integrated 5-port GbE switch (RGMII/MII) provides full-gigabit wired connectivity. USB 3.0 and USB 2.0 host ports enable storage, 4G dongles, and peripheral integration — all in a compact 50 × 50 mm SMD footprint.
OpenWrt Support & Full Secondary Development
Ships with OpenWrt-compatible firmware. Developers can customize routing rules, install packages, configure VPN, VLAN, QoS, and MQTT/cloud connectivity. The open SDK and rich community ecosystem accelerate time-to-market for smart gateway and CPE products.
Ideal Applications
- Industrial IoT Gateway: Edge computing node, protocol conversion, MQTT/cloud uplink
- Smart Router / CPE: Home and enterprise gigabit routing with custom firmware
- 4G/5G LTE Gateway: PCIe LTE module expansion for cellular backhaul
- Smart City Infrastructure: Streetlight control, environmental monitoring aggregation
- Energy & PV Management: Solar inverter data aggregation, remote monitoring
- Embedded Linux Platform: Custom application hosting, VPN concentrator, NAS
Frequently Asked Questions
Q: Does the EWM103-WF7621A support OpenWrt out of the box?
A: Yes. The module is fully compatible with OpenWrt and ships with factory firmware based on it. Developers can flash custom OpenWrt builds, install packages via opkg, and configure routing, VPN, QoS, and cloud connectivity without hardware modification.
Q: Can I add a 5GHz WiFi or 4G LTE module?
A: Yes. The three PCIe interfaces support standard mini-PCIe WiFi cards (2.4/5GHz) and 4G/5G LTE modules simultaneously. USB 3.0 also supports USB-based LTE dongles. This makes the EWM103-WF7621A a flexible platform for multi-radio gateway designs.
Q: What is the operating voltage and power requirement?
A: The module operates at 3.3V DC with a typical supply current of 500 mA. Input voltage must not exceed 3.5V — overvoltage may permanently damage the module. Use a stable, low-ripple 3.3V regulator. Communication logic is also 3.3V; do not connect 5V TTL directly.
Q: Is the RAM and Flash customizable for production orders?
A: Yes. Standard configuration is 128 MB DDR3 RAM + 32 MB Flash. For volume orders, EBYTE supports customization to DDR3 256 MB / 64 MB / 32 MB RAM and 16 MB / 8 MB Flash to optimize BOM cost for your specific application.
