The dimensions of P4S-347-R2 are as follows: (Unit: mm)
The weight is about 23.9g(without USB Wireless LAN dongle).
PHPoC Shield for Arduino communicates to Arduino via SPI through ICSP header. SPI interface of the Arduino Uno and Mega is as follows:
On the Mega, the pin 53 must be kept as an output or the SPI interface won't work.
It supports IEEE 802.11b/g wireless LAN. Connect a USB WIFI dongle to this port.
You must use a USB WIFI dongle equipped with Ralink RT3070 or RT5370 chipset.
Micro USB Port
It is a reserved port.
It provides a microSD card socket. Arduino directly communicates with SD memory through SPI. The SS pin of SPI for selecting SD memory communication is 4.
It provides a built-in battery for RTC features and saving log information.
It is used to change or to initialize environment values to default value.
This button is for product reset.
It is for communication with smart expansions for PHPoC shields.
This shield has 3 LEDs to indicate the status.