On each icoBoard up to three ico X-tention boards allows the connection of various additional hardware.
Additionally there are 40 connections available at two 2*16 100mil connectors on the icoBoard.
Currently available is the ico X-tention board PMOD for 4 additional PMOD modules as seen in the picture.
The following ico X-tention boards to connect other sensors and actuators are currently planned.
ico X-tention board UEXT to connect to UEXT boards
ico X-tention board Groove to connet to several Groove sensors
ico X-tention board RaspiComm to connect up to four RaspiComm Modules
ico X-tention board Tinker to connect to Tinker Bricklets
Additionally an interface board from dual PMOD to 32*32 LED panel is planned.