A lot of projects use pro mini because it is excellent arduino board. So I decided to design improved pro mini board for mysensors projects.

Features

• 100% pin to pin compatible with original arduino pro mini board
• External JDEC EPROM\Flash memory chip on board
• Onboard Atmel ATSHA204A CryptoAuthentication chip
• Battery voltage sensor (via divider)
• Ultra LDO onboard (it is easy to cut it).
• Temperature and humidity sensor Si7021 (optional, to reduce board price)
• All components are on the top side, so board is suitable for smd mounting.
• Easy in production 6mil width\clearance board

PS It is too late to produce this board today, but I've added contest tag just in case :)