We have created a port expander for the RFduino, with the eventual goal of adding 8 more I/O's to the RFduino. We selected the MCP23008 because Adafruit has an Arduino library for it, but it turns out that the library isn't directly comparable with RFduino. I am sure the changes required are minor but I decided to do a simple tutorial on writing to this port expander directly!
This is a brief overview of the OTA (Over The Air) firmware updating procedure for BLE112 or BLE113 systems equipped with the required hardware for OTA updates (like our BLE113 breakout board). This procedure (and our BLE113 breakout board) strictly follows Bluegigas APP NOTE for OTA updating.