Nice prototyping board!  We&#x27;ve been working on a similar concept at ESProto - <a href="http:&#x2F;&#x2F;www.esproto.com&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.esproto.com&#x2F;</a> - and have taken a few steps beyond your board.  We&#x27;ve created the ESProto 1, and now the ESProto IoT.  Both are being released as open source, and also sold as kits.<p>The ESProto 1 is designed to support the AI Thinker ESP-12F (FCC Certified) module, and give you space for an optional regulator, and prototyping space on board.  We include jumpers and a push button for easily entering programming mode.<p>The ESProto IoT is our newest prototyping board, and couples the ESP-12F with a 5v Arduino Pro Mini to provide enhanced connectivity for sensors and peripherals, all in the form factor of the Arduino Uno.<p>Both boards use external USB for programming.<p>These things are too cool, and too much fun!