For absolute minimal instructions for setting up your hardware, please review the following documentation: Sparrow Quickstart
For instructions on how to download a GitHub release and upload the binary to your device, please review the following documentation: Sparrow Firmware Updates
For instructions on how to setup your hardware, please review the following documentation: Sparrow Builder's Guide
For instructions on how to write applications for the Sparrow framework, please review the following document: Writing Sparrow Applications
A deep dive into the Diagnostic application! Not only does this document provide a high-level overview, but it also moves line-by-line through the source explaining each step. Sparrow Application Guide: Diagnostic is a must read if you are planning to develop a Sparrow application.