CHDK can be run from the SD card, so no permanent modifications ... SoftwareSerial is used to connect to the Bluetooth module. The Arduino code has built-in functionality for both Canon and ...

8MB of Flash and the usual compliment of Arduino pins in a Leonardo-compatible layout. Also on the SoC is a PCIE bus, Ethernet, a USB 2.0 host, and an SD card. There’s a lot of stuff on this ...