When Link Card evaluated processors for a Linux audio IoT board, they considered candidates like Allwinner H3 and Ralink RT5350, but eventually went with Atheros AR9331 due to cost, simplicity, features, and power consumption reasons for their Music802 board based on LC930 system-on-module.
- SoC – Atheros AR9331 MIPS 24K WiSoC @ 400 MHz
- System Memory – 64MB DDR2
- Storage – 16MB SPI Flash
- Audio – Cirrus Logic WM8960 Codec; 2x 3.5 mm jacks for Line IN and headphone; optical S/PDIF output; on-board microphone
- Connectivity – 2x 10/100M Ethernet ports (WAN & LAN), 802.11 b/g/n WiFi with 1x IPEX antenna connector
- USB – 1x USB 2.0 host, 1x micro USB port for power only
- Debugging – 3-pin 2.54mm pitch header for serial console
- Expansion – 16-pin 2.0mm pitch header for GPIO, UART, I2C, etc..
- Misc – Power, system, and 2x user LEDs, 1x reset button, 1x power switch
- Power Supply – 5V/1A via micro USB port
- Dimensions – 83 x 77mm
The board runs u-boot + OpenWrt, the company claims the project is open source, and promises to release source code and hardware files to backers. The latter is often promised on crowdfunding campaigns, but no always followed through.
I’ve asked the company whether they had any github account or similar, and will update the post accordingly if I get an answer.There’s a github account with u-boot code, but the OpenWrt repo is empty for now.
Music802 project has launched on Indiegogo (flexible campaign), and the company aims to raise $7,500. You’ll need to pledge $19 to get the board with an external antenna, and if you are interested in LC930 CPU module instead, there are rewards for the system-on-module starting at $40 for 5 LC930 modules. The board price is probably OK, but sadly the $25 to $35 shipping fee makes it completely unattractive. The first 50 boards would be shipped one week after the campaign, and other boards about 3 weeks later. Bear in mind that one reason for raising funds is to pass CE and FCC certifications, so I assume none of the Music802 boards will have it at that time. LC930 module is likely already certified since it was released in 2013, and you can find more details on the product page.
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