Pictured above is an early prototype. The final board will have quite some differences – mainly some components have been moved to allow better enclosure compatibility.
Watermelon is an affordable, DIY-friendly, compact embedded development board with pure connectivity in mind. It’s about twice the size of a PI, but it comes with way more juice! Seven fully powered USB 2.0 host ports and one USB-OTG are on-board, so there’s no need for a separate USB hub. You can even power attached devices with an additional LIPO battery to have uninterruptible power.
Lots of I/O make it easy to attach your existing gadgets, modules and sensors. A battery backed realtime clock, a SATA connector, LIPO charging circuit and WiFi are on-board, to help you to turn your prototype into a product easily.
Watermelon is the perfect connectivity hub for your next Internet Of Things project and always-on device prototype – or a base for your next commercial product. All the components you’ll need for real-life applications are included.
The Watermelon IoT Development Board is Open Source Hardware (OSHW). Its schematic and PCB layout are licensed under Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0). The CAD sources are available so you can study, modify, distribute, make and even sell derivatives of the Watermelon IoT Board. There’s no non-commercial restriction. The Watermelon IoT board itself is based on the OlinuXino Lime by Olimex.
However, the trade mark “Watermelon IoT Board” and the silkscreen graphics remain intellectual property of Whitebox Labs and can’t be used in your derivatives.