EBYTE E103-W20(7628) MT7628AN IEEE802.11b/g/n 24dBm Serial port to wifi low power consumption wifi modules
E103-W20 (7628) OpenWrt IoT Wireless Routing Module The E103-W20 (7628) is a compact OpenWrt-based serial-to-WiFi routing module featuring MediaTek's MT7628AN SoC with 580MHz processing power, 20-24dBm transmission, and full custom development capabilities. Key Features Open-Source Flexibility Runs OpenWrt operating system for complete customization and firmware development freedom. High-Performance Processing MT7628AN SoC with 580MHz MIPS CPU handles complex networking tasks and simultaneous connections. Industrial-Grade Wireless 20-24dBm transmission power with IEEE802.11b/g/n support ensures reliable 200m+ connectivity. Rich Interface Options Exposes all MT7628AN interfaces including UART, SPI, I2C, Ethernet, and USB for peripheral expansion. Compact Form Factor Ultra-small 34.1×18.7×2.77mm SMD design enables integration in space-constrained applications. Technical Specifications Core Components SoC: MediaTek MT7628AN CPU: 580MHz MIPS 24Kc Memory: 128MB DDR2 RAM + 16MB SPI Flash Wireless Capabilities WiFi Standard: IEEE 802.11b/g/n Frequency: 2.4GHz TX Power: 20-24dBm (adjustable) Sensitivity: -95dBm @ 11n MCS0 Physical Dimensions Size: 34.1×18.7×2.77mm Weight: 3.5g ±0.1g Antenna: Integrated PCB antenna Power Requirements Operating Voltage: 3.3V DC Power Consumption: 500mA typical Application Scenarios Industrial IoT Gateways Convert legacy serial devices to WiFi-enabled smart sensors in manufacturing environments. Custom Network Appliances Develop specialized routers, VPN gateways, and network security devices with OpenWrt flexibility. Smart Home Controllers Create hub devices for home automation systems with protocol translation capabilities. Wireless Sensor Networks Build distributed monitoring systems for agriculture, environmental sensing, and equipment tracking. Retail Automation Power digital signage controllers, payment terminals, and inventory management systems. Electrical parameters unit model Remark E103-W20（7688） E103-W20（7688） working voltage V 3.3±0.2V Voltage over 3.5 V will permanently burn the module communication level V 3.3 Voltage over 3.5 V will permanently burn the module No-load running current mA 180±50 Average power consumption Supply Current Requirement mA ≥1000 temperature Operating temperature ℃ -20～+55 Industrial grade Storage temperature -40～+85 humidity use %RH 10～95(non-condensing) storage 5～95(non-condensing) Hardware parameters model Remark E103-W20（7688） E103-W20（7688） chip MT7688NN MT7628NN Flash 32MB Customizable 16MB/8MB Memory DDR2 128MB Customizable DDR2 256M/64M/32MB Memory MIPS24KEc Packaging method patch SMD Antenna interface IPEX×1 （1T2R 2.4 GHz with 150Mbps PHY data rate） IPEX×2 （2T2R 2.4 GHz with 300Mbps PHY data rate） Characteristic impedance about 50 ohms interface Ethernet interface 5 10M/100M adaptive Interfaces supported by factory default firmware 1WAN, 4 LAN . UART 3 way The interfaces supported by the firmware are 2-way UART with transparent transmission function . SDIO 1 way Firmware interface not supported SPI 1 way Firmware interface not supported I2C 1 way Firmware interface not supported I2S 1 way Firmware interface not supported PWM 1 way Firmware interface not supported GPIO 8 or more Firmware Supported Interfaces Defined Functions size 34.1*18.7*2.7mm 36.1*18.7*2.7mm The error size is ±0.1mm Note: 1. The default firmware of the module is the firmware developed by our company based on Linux; Ethernet, WiFi, UART0 and UART1 of this firmware have transparent transmission function; 2. The OPENWRT program or the original MTK Linux program can be programmed according to the actual usage. RF parameters unit Model Remark E103-W20（7688） E103-W20（7688） transmit power dBm 20～24 transmit power - IEEE 802.11b/g/n Ideal Range Meter M 200 Antenna gain 5dBi , in a line of sight main frequency MB 580