WiFly Click

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How does it work?

WiFly Click is based on the RN-131, a standalone embedded wireless 802.11b/g/n networking module from Microchip. The RN-131 comes preloaded with software to simplify integration and minimize application development, controlled with simple ASCII commands for scanning, authenticating, and connecting to the WiFi networks. This Click board™ has many built-in networking applications, such as DHCP, UDP, DNS, ARP, ICMP, TCP, HTTP client, and FTP client. The module can achieve data rates of up to 54Mbps over an onboard chip antenna or external one through a u.Fl connector. Regarding security, this Click board™ features WEP-128, WPA-PSK(TKIP), or WPA2-PSK(AES) for WiFi authentications. Remote configuration can be made over WiFi using Telnet, although firmware can be upgraded over over-the-air (OtA).

To communicate with the host MCU, the WiFly Click uses the UART interface of the mikroBUS™ socket, with commonly used UART RX and TX pins. This module can be reset over the standard RST pin of the mikroBUS™ socket. The module also supports Sleep mode and can be awakened with active high on the WAK pin (FORCE_AWAKE). UART RTS and CTS flow can be controlled over the CTS, and RTS pins as additional functionality enabled through a population of the J1 and J2 solder jumpers. This Click board™ also features LEDs for visual status presentation. Red ASSC LED shows if the module is associated with a network, with OFF status if internet access is OK. The yellow LED labeled with DATA shows when data is transferred, and the green CONN LED indicates the TCP/IP connection status with different light patterns depending on the IP and internet statuses.

This Click board™ can only be operated from a 3.3V logic voltage level. Therefore, the board must perform appropriate logic voltage conversion before using MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used as a reference for further development.

Specifications

Pinout diagram

This table shows how the pinout on WiFly Click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin					Pin	Notes
	NC	1	AN	PWM	16	NC
Reset	RST	2	RST	INT	15	NC
Forced Wake-Up	WAK	3	CS	RX	14	TX	UART TX
	NC	4	SCK	TX	13	RX	UART RX
	NC	5	MISO	SCL	12	RTS	UART RTS
	NC	6	MOSI	SDA	11	CTS	UART CTS
Power Supply	3.3V	7	3.3V	5V	10	NC
Ground	GND	8	GND	GND	9	GND	Ground

Onboard settings and indicators

WiFly Click electrical specifications