I would like to introduce you to a free RAD development tool that we provide named B4J.
One of its goals is to make it easy to build IoT solutions, with a focus on connectivity.
A wrapper for MRAA library is available.
MRAA wrapper: B4J Library - [IoT] jMRAA - Intel Edison | B4X Community - Android, iOS, desktop, server and IoT programming tools
For more information: https://www.b4x.com/b4j
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