RAK Wireless has launched a new development board powered by Mediatek MT7628A processor running OpenWrt with built-in WiFi and Ethernet connectivity, and audio codec and microphone to support Amazon Alexa voice service. Bluetooth, Zigbee, and Z-wave will also be supported via UART modules.
- Processor – Mediatek MT7628A MIPS24KEc CPU @ up to 580MHz
- System Memory – 128MB DDR2 (64 MB optional)
- Storage – 16 MB flash + micro SD card
- MicroSemi ZL38062 for audio in and out
- MicroSemi ZL38067 to handle “Alexa” keyword
- single or dual digital microphone up to 5 meter range
- Far field voice wake up
- Support for echo cancellation
- 802.11 b/g/n WiFi 2×2 MIMO up to 300 Mbps
- 2x 10/100M Ethernet (LAN and WAN)
- Optional UART modules for Bluetooth, ZigBeem Z-Wave
- USB – 1x USB 2.0 host port
- Expansion – Arduino headers with UART, I2C, SPI and GPIOs
- Power Supply – 5V via power barrel or mini USB port
As you can see from the photo below, the main components are on separate boards (for some reasons) with a “mother board”, MT7628 module, and an audio sub-board.
The solution can be used to build voice controlled home automation gateways or appliances, smart speakers, and robots. RAK Wireless sells a development kit with the three boards, an Ethernet cable, a speaker, a USB cable, two antennas, some Dupont wires, some jumpers, and a Quick Start Guide for $49 plus shipping. Visit the product page for a few more details.
Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.