As shown below Arietta has a placement for 6 strip pitch 2mm where it is possible to place a WiFi module. The WiFi module has a 6 pin male strip already soldered on the bottom side. On Arietta it is possible to place a female connector or to weld the WiFi module directly in case you don't need to remove the module.
On this pad are presents the USB B host port signals, the power supply line at 3.3 volt DC, and some GPIO used to manage some module function.
|7||WPS||OUT||WSP function. Low level activated. Wired to PC16|
|6||LED||N.C.||WiFi module activity led. Not used|
|5||GND||Signal ground GND|
|4||USB B D+||USB Host B D+|
|3||USB B D-||USB Host B D-|
|2||VCC 3.3V DC||OUT||Output from the internal regulator from 5 to 3.3 volt|
|1||WiFi TXEN||OUT||RF on/off control. Low level activated to off. Wired to PC30|
echo 80 > /sys/class/gpio/export echo out > /sys/class/gpio/pioC16/direction echo 0 > /sys/class/gpio/pioC16/value
echo 1 > /sys/class/gpio/pioC16/value
echo 94 > /sys/class/gpio/export echo out > /sys/class/gpio/pioC30/direction echo 0 > /sys/class/gpio/pioC30/value
echo 1 > /sys/class/gpio/pioC30/value