A custom Linux computer as a 6LoWPAN gateway
Summary
Hackaday portrays a self-designed four-layer board that combines OpenWrt, Ethernet and a 6LoWPAN radio chip into an open gateway. The project uses a four-layer circuit board. The board was reflow-soldered on a hot plate.
Ideas
- An AT91SAM9G25 forms the 400 megahertz Linux computer.
- Ethernet connects the device to the home network.
- A CC2520 chip serves the wireless sensor network.
- OpenWrt provides routing and system management.
Insights
- Custom Linux hardware gives you control over the whole IoT chain.
- Open gateways reduce dependence on discontinued manufacturer services.
- With careful reflow, complex BGAs become achievable for hobby projects.
Facts
- 6LoWPAN carries IPv6 over low-power radio networks.
Recommendations
- Publish the schematic, layout and reproducible firmware together.
- Separate the IoT radio network and management access with clear firewall zones.
References
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