The Dimensions of WIFI Module USR-C216 

 

Unit: mm

Pin	Name	Signal type	Introduction
1	GPIO1	NC	NC
2	GPIO2	NC	NC
3	GPIO3	I/O	GPIO, do not support
4	GPIO4	I/O	GPIO, do not support
5	UART0_ TX	O	TX of UART
6	UART0_ RX	I	RX of UART
7	UART0_ CTS	I	CTS of UART
8	UART0_ RTS	O	RTS of UART
9	SPI_IRQ	O	485 Control pin, after disabled 485 function presents high resistance state, enable 485 function, the default is low level; when serial port has data transmission, temporary switch to high level
10	nReset	I	Module reset, low level effective, pull down at least 100 ms
11	nReady	O	Module works normally with indication pin, low efficiency, external LED
12	nReload	I	Pull down 0.5-3 seconds to start Simple Config distribution network. Pull down more than 3 seconds to restore factory settings.
13	nLink	O	Module WiFi Connection Indicator Pin, Low Effective, External LED
14	WPS	I/O	WPS function pin, do not support
15	VCC	P	3.3V
16	GND	P	ground
17	RFIO	O	Radio Frequency Signal Output