Calao Systems is a French company producing small Linux-based computers, roughly the size of a USB key.
Devices use an Atmel or a Nomadik processor (based on ARM architecture) and usually offer about 128MB of RAM (up to 1GB for the most advanced models). The operating system is placed in the 128MB - 1GB non volatile memory.
Devices are powered via a USB male connector which is plugged into a host computer. During development, communication with the system is also performed using this USB connection (there are no serial ports). JTAG is also provided via USB.
Devices also have a connector to which small expansion boards can be fitted on the top of the main board. There are expansion boards for wireless, motion sensors, Bluetooth and so on.
All Calao USB keys have a wired LAN port. Some also have additional USB sockets.
Calao devices use U-boot and run version 2.6 of the Linux kernel. The company recommends the GNU toolchain to develop the software for these devices.
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